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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/iio/imu/st_lsm6dsx
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/iio/imu/st_lsm6dsx')
-rw-r--r--drivers/iio/imu/st_lsm6dsx/Kconfig36
-rw-r--r--drivers/iio/imu/st_lsm6dsx/Makefile8
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h550
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c789
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c2864
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c191
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c57
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c917
-rw-r--r--drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c179
9 files changed, 5591 insertions, 0 deletions
diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
new file mode 100644
index 0000000000..5865a295a4
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config IIO_ST_LSM6DSX
+ tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
+ depends on (I2C || SPI || I3C)
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select IIO_KFIFO_BUF
+ select IIO_ST_LSM6DSX_I2C if (I2C)
+ select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
+ select IIO_ST_LSM6DSX_I3C if (I3C)
+ help
+ Say yes here to build support for STMicroelectronics LSM6DSx imu
+ sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
+ ism330dlc, lsm6dso, lsm6dsox, asm330lhh, asm330lhhx, lsm6dsr,
+ lsm6ds3tr-c, ism330dhcx, lsm6dsrx, lsm6ds0, lsm6dsop, lsm6dstx,
+ lsm6dsv, lsm6dsv16x, lsm6dso16is, ism330is, asm330lhb, lsm6dst
+ and the accelerometer/gyroscope of lsm9ds1.
+
+ To compile this driver as a module, choose M here: the module
+ will be called st_lsm6dsx.
+
+config IIO_ST_LSM6DSX_I2C
+ tristate
+ depends on IIO_ST_LSM6DSX
+ select REGMAP_I2C
+
+config IIO_ST_LSM6DSX_SPI
+ tristate
+ depends on IIO_ST_LSM6DSX
+ select REGMAP_SPI
+
+config IIO_ST_LSM6DSX_I3C
+ tristate
+ depends on IIO_ST_LSM6DSX
+ select REGMAP_I3C
diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
new file mode 100644
index 0000000000..57cbcd67d6
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
+ st_lsm6dsx_shub.o
+
+obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
new file mode 100644
index 0000000000..c19237717e
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -0,0 +1,550 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * STMicroelectronics st_lsm6dsx sensor driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#ifndef ST_LSM6DSX_H
+#define ST_LSM6DSX_H
+
+#include <linux/device.h>
+#include <linux/iio/iio.h>
+#include <linux/regulator/consumer.h>
+
+#define ST_LSM6DS3_DEV_NAME "lsm6ds3"
+#define ST_LSM6DS3H_DEV_NAME "lsm6ds3h"
+#define ST_LSM6DSL_DEV_NAME "lsm6dsl"
+#define ST_LSM6DSM_DEV_NAME "lsm6dsm"
+#define ST_ISM330DLC_DEV_NAME "ism330dlc"
+#define ST_LSM6DSO_DEV_NAME "lsm6dso"
+#define ST_ASM330LHH_DEV_NAME "asm330lhh"
+#define ST_LSM6DSOX_DEV_NAME "lsm6dsox"
+#define ST_LSM6DSR_DEV_NAME "lsm6dsr"
+#define ST_LSM6DS3TRC_DEV_NAME "lsm6ds3tr-c"
+#define ST_ISM330DHCX_DEV_NAME "ism330dhcx"
+#define ST_LSM9DS1_DEV_NAME "lsm9ds1-imu"
+#define ST_LSM6DS0_DEV_NAME "lsm6ds0"
+#define ST_LSM6DSRX_DEV_NAME "lsm6dsrx"
+#define ST_LSM6DST_DEV_NAME "lsm6dst"
+#define ST_LSM6DSOP_DEV_NAME "lsm6dsop"
+#define ST_ASM330LHHX_DEV_NAME "asm330lhhx"
+#define ST_LSM6DSTX_DEV_NAME "lsm6dstx"
+#define ST_LSM6DSV_DEV_NAME "lsm6dsv"
+#define ST_LSM6DSV16X_DEV_NAME "lsm6dsv16x"
+#define ST_LSM6DSO16IS_DEV_NAME "lsm6dso16is"
+#define ST_ISM330IS_DEV_NAME "ism330is"
+#define ST_ASM330LHB_DEV_NAME "asm330lhb"
+
+enum st_lsm6dsx_hw_id {
+ ST_LSM6DS3_ID = 1,
+ ST_LSM6DS3H_ID,
+ ST_LSM6DSL_ID,
+ ST_LSM6DSM_ID,
+ ST_ISM330DLC_ID,
+ ST_LSM6DSO_ID,
+ ST_ASM330LHH_ID,
+ ST_LSM6DSOX_ID,
+ ST_LSM6DSR_ID,
+ ST_LSM6DS3TRC_ID,
+ ST_ISM330DHCX_ID,
+ ST_LSM9DS1_ID,
+ ST_LSM6DS0_ID,
+ ST_LSM6DSRX_ID,
+ ST_LSM6DST_ID,
+ ST_LSM6DSOP_ID,
+ ST_ASM330LHHX_ID,
+ ST_LSM6DSTX_ID,
+ ST_LSM6DSV_ID,
+ ST_LSM6DSV16X_ID,
+ ST_LSM6DSO16IS_ID,
+ ST_ISM330IS_ID,
+ ST_ASM330LHB_ID,
+ ST_LSM6DSX_MAX_ID,
+};
+
+#define ST_LSM6DSX_BUFF_SIZE 512
+#define ST_LSM6DSX_CHAN_SIZE 2
+#define ST_LSM6DSX_SAMPLE_SIZE 6
+#define ST_LSM6DSX_TAG_SIZE 1
+#define ST_LSM6DSX_TAGGED_SAMPLE_SIZE (ST_LSM6DSX_SAMPLE_SIZE + \
+ ST_LSM6DSX_TAG_SIZE)
+#define ST_LSM6DSX_MAX_WORD_LEN ((32 / ST_LSM6DSX_SAMPLE_SIZE) * \
+ ST_LSM6DSX_SAMPLE_SIZE)
+#define ST_LSM6DSX_MAX_TAGGED_WORD_LEN ((32 / ST_LSM6DSX_TAGGED_SAMPLE_SIZE) \
+ * ST_LSM6DSX_TAGGED_SAMPLE_SIZE)
+#define ST_LSM6DSX_SHIFT_VAL(val, mask) (((val) << __ffs(mask)) & (mask))
+
+#define ST_LSM6DSX_CHANNEL_ACC(chan_type, addr, mod, scan_idx) \
+{ \
+ .type = chan_type, \
+ .address = addr, \
+ .modified = 1, \
+ .channel2 = mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = scan_idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }, \
+ .event_spec = &st_lsm6dsx_event, \
+ .ext_info = st_lsm6dsx_ext_info, \
+ .num_event_specs = 1, \
+}
+
+#define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx) \
+{ \
+ .type = chan_type, \
+ .address = addr, \
+ .modified = 1, \
+ .channel2 = mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = scan_idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }, \
+ .ext_info = st_lsm6dsx_ext_info, \
+}
+
+struct st_lsm6dsx_reg {
+ u8 addr;
+ u8 mask;
+};
+
+struct st_lsm6dsx_sensor;
+struct st_lsm6dsx_hw;
+
+struct st_lsm6dsx_odr {
+ u32 milli_hz;
+ u8 val;
+};
+
+#define ST_LSM6DSX_ODR_LIST_SIZE 8
+struct st_lsm6dsx_odr_table_entry {
+ struct st_lsm6dsx_reg reg;
+
+ struct st_lsm6dsx_odr odr_avl[ST_LSM6DSX_ODR_LIST_SIZE];
+ int odr_len;
+};
+
+struct st_lsm6dsx_samples_to_discard {
+ struct {
+ u32 milli_hz;
+ u16 samples;
+ } val[ST_LSM6DSX_ODR_LIST_SIZE];
+};
+
+struct st_lsm6dsx_fs {
+ u32 gain;
+ u8 val;
+};
+
+#define ST_LSM6DSX_FS_LIST_SIZE 4
+struct st_lsm6dsx_fs_table_entry {
+ struct st_lsm6dsx_reg reg;
+
+ struct st_lsm6dsx_fs fs_avl[ST_LSM6DSX_FS_LIST_SIZE];
+ int fs_len;
+};
+
+/**
+ * struct st_lsm6dsx_fifo_ops - ST IMU FIFO settings
+ * @update_fifo: Update FIFO configuration callback.
+ * @read_fifo: Read FIFO callback.
+ * @fifo_th: FIFO threshold register info (addr + mask).
+ * @fifo_diff: FIFO diff status register info (addr + mask).
+ * @max_size: Sensor max fifo length in FIFO words.
+ * @th_wl: FIFO threshold word length.
+ */
+struct st_lsm6dsx_fifo_ops {
+ int (*update_fifo)(struct st_lsm6dsx_sensor *sensor, bool enable);
+ int (*read_fifo)(struct st_lsm6dsx_hw *hw);
+ struct {
+ u8 addr;
+ u16 mask;
+ } fifo_th;
+ struct {
+ u8 addr;
+ u16 mask;
+ } fifo_diff;
+ u16 max_size;
+ u8 th_wl;
+};
+
+/**
+ * struct st_lsm6dsx_hw_ts_settings - ST IMU hw timer settings
+ * @timer_en: Hw timer enable register info (addr + mask).
+ * @hr_timer: Hw timer resolution register info (addr + mask).
+ * @fifo_en: Hw timer FIFO enable register info (addr + mask).
+ * @decimator: Hw timer FIFO decimator register info (addr + mask).
+ * @freq_fine: Difference in % of ODR with respect to the typical.
+ */
+struct st_lsm6dsx_hw_ts_settings {
+ struct st_lsm6dsx_reg timer_en;
+ struct st_lsm6dsx_reg hr_timer;
+ struct st_lsm6dsx_reg fifo_en;
+ struct st_lsm6dsx_reg decimator;
+ u8 freq_fine;
+};
+
+/**
+ * struct st_lsm6dsx_shub_settings - ST IMU hw i2c controller settings
+ * @page_mux: register page mux info (addr + mask).
+ * @master_en: master config register info (addr + mask).
+ * @pullup_en: i2c controller pull-up register info (addr + mask).
+ * @aux_sens: aux sensor register info (addr + mask).
+ * @wr_once: write_once register info (addr + mask).
+ * @emb_func: embedded function register info (addr + mask).
+ * @num_ext_dev: max number of slave devices.
+ * @shub_out: sensor hub first output register info.
+ * @slv0_addr: slave0 address in secondary page.
+ * @dw_slv0_addr: slave0 write register address in secondary page.
+ * @batch_en: Enable/disable FIFO batching.
+ * @pause: controller pause value.
+ */
+struct st_lsm6dsx_shub_settings {
+ struct st_lsm6dsx_reg page_mux;
+ struct {
+ bool sec_page;
+ u8 addr;
+ u8 mask;
+ } master_en;
+ struct {
+ bool sec_page;
+ u8 addr;
+ u8 mask;
+ } pullup_en;
+ struct st_lsm6dsx_reg aux_sens;
+ struct st_lsm6dsx_reg wr_once;
+ struct st_lsm6dsx_reg emb_func;
+ u8 num_ext_dev;
+ struct {
+ bool sec_page;
+ u8 addr;
+ } shub_out;
+ u8 slv0_addr;
+ u8 dw_slv0_addr;
+ u8 batch_en;
+ u8 pause;
+};
+
+struct st_lsm6dsx_event_settings {
+ struct st_lsm6dsx_reg enable_reg;
+ struct st_lsm6dsx_reg wakeup_reg;
+ u8 wakeup_src_reg;
+ u8 wakeup_src_status_mask;
+ u8 wakeup_src_z_mask;
+ u8 wakeup_src_y_mask;
+ u8 wakeup_src_x_mask;
+};
+
+enum st_lsm6dsx_ext_sensor_id {
+ ST_LSM6DSX_ID_MAGN,
+};
+
+/**
+ * struct st_lsm6dsx_ext_dev_settings - i2c controller slave settings
+ * @i2c_addr: I2c slave address list.
+ * @wai: Wai address info.
+ * @id: external sensor id.
+ * @odr_table: Output data rate of the sensor [Hz].
+ * @fs_table: Configured sensor sensitivity table depending on full scale.
+ * @temp_comp: Temperature compensation register info (addr + mask).
+ * @pwr_table: Power on register info (addr + mask).
+ * @off_canc: Offset cancellation register info (addr + mask).
+ * @bdu: Block data update register info (addr + mask).
+ * @out: Output register info.
+ */
+struct st_lsm6dsx_ext_dev_settings {
+ u8 i2c_addr[2];
+ struct {
+ u8 addr;
+ u8 val;
+ } wai;
+ enum st_lsm6dsx_ext_sensor_id id;
+ struct st_lsm6dsx_odr_table_entry odr_table;
+ struct st_lsm6dsx_fs_table_entry fs_table;
+ struct st_lsm6dsx_reg temp_comp;
+ struct {
+ struct st_lsm6dsx_reg reg;
+ u8 off_val;
+ u8 on_val;
+ } pwr_table;
+ struct st_lsm6dsx_reg off_canc;
+ struct st_lsm6dsx_reg bdu;
+ struct {
+ u8 addr;
+ u8 len;
+ } out;
+};
+
+/**
+ * struct st_lsm6dsx_settings - ST IMU sensor settings
+ * @reset: register address for reset.
+ * @boot: register address for boot.
+ * @bdu: register address for Block Data Update.
+ * @id: List of hw id/device name supported by the driver configuration.
+ * @channels: IIO channels supported by the device.
+ * @irq_config: interrupts related registers.
+ * @drdy_mask: register info for data-ready mask (addr + mask).
+ * @odr_table: Hw sensors odr table (Hz + val).
+ * @samples_to_discard: Number of samples to discard for filters settling time.
+ * @fs_table: Hw sensors gain table (gain + val).
+ * @decimator: List of decimator register info (addr + mask).
+ * @batch: List of FIFO batching register info (addr + mask).
+ * @fifo_ops: Sensor hw FIFO parameters.
+ * @ts_settings: Hw timer related settings.
+ * @shub_settings: i2c controller related settings.
+ */
+struct st_lsm6dsx_settings {
+ struct st_lsm6dsx_reg reset;
+ struct st_lsm6dsx_reg boot;
+ struct st_lsm6dsx_reg bdu;
+ struct {
+ enum st_lsm6dsx_hw_id hw_id;
+ const char *name;
+ u8 wai;
+ } id[ST_LSM6DSX_MAX_ID];
+ struct {
+ const struct iio_chan_spec *chan;
+ int len;
+ } channels[2];
+ struct {
+ struct st_lsm6dsx_reg irq1;
+ struct st_lsm6dsx_reg irq2;
+ struct st_lsm6dsx_reg irq1_func;
+ struct st_lsm6dsx_reg irq2_func;
+ struct st_lsm6dsx_reg lir;
+ struct st_lsm6dsx_reg clear_on_read;
+ struct st_lsm6dsx_reg hla;
+ struct st_lsm6dsx_reg od;
+ } irq_config;
+ struct st_lsm6dsx_reg drdy_mask;
+ struct st_lsm6dsx_odr_table_entry odr_table[2];
+ struct st_lsm6dsx_samples_to_discard samples_to_discard[2];
+ struct st_lsm6dsx_fs_table_entry fs_table[2];
+ struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID];
+ struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID];
+ struct st_lsm6dsx_fifo_ops fifo_ops;
+ struct st_lsm6dsx_hw_ts_settings ts_settings;
+ struct st_lsm6dsx_shub_settings shub_settings;
+ struct st_lsm6dsx_event_settings event_settings;
+};
+
+enum st_lsm6dsx_sensor_id {
+ ST_LSM6DSX_ID_GYRO,
+ ST_LSM6DSX_ID_ACC,
+ ST_LSM6DSX_ID_EXT0,
+ ST_LSM6DSX_ID_EXT1,
+ ST_LSM6DSX_ID_EXT2,
+ ST_LSM6DSX_ID_MAX,
+};
+
+enum st_lsm6dsx_fifo_mode {
+ ST_LSM6DSX_FIFO_BYPASS = 0x0,
+ ST_LSM6DSX_FIFO_CONT = 0x6,
+};
+
+/**
+ * struct st_lsm6dsx_sensor - ST IMU sensor instance
+ * @name: Sensor name.
+ * @id: Sensor identifier.
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ * @gain: Configured sensor sensitivity.
+ * @odr: Output data rate of the sensor [Hz].
+ * @samples_to_discard: Number of samples to discard for filters settling time.
+ * @watermark: Sensor watermark level.
+ * @decimator: Sensor decimation factor.
+ * @sip: Number of samples in a given pattern.
+ * @ts_ref: Sensor timestamp reference for hw one.
+ * @ext_info: Sensor settings if it is connected to i2c controller
+ */
+struct st_lsm6dsx_sensor {
+ char name[32];
+ enum st_lsm6dsx_sensor_id id;
+ struct st_lsm6dsx_hw *hw;
+
+ u32 gain;
+ u32 odr;
+
+ u16 samples_to_discard;
+ u16 watermark;
+ u8 decimator;
+ u8 sip;
+ s64 ts_ref;
+
+ struct {
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ u32 slv_odr;
+ u8 addr;
+ } ext_info;
+};
+
+/**
+ * struct st_lsm6dsx_hw - ST IMU MEMS hw instance
+ * @dev: Pointer to instance of struct device (I2C or SPI).
+ * @regmap: Register map of the device.
+ * @irq: Device interrupt line (I2C or SPI).
+ * @fifo_lock: Mutex to prevent concurrent access to the hw FIFO.
+ * @conf_lock: Mutex to prevent concurrent FIFO configuration update.
+ * @page_lock: Mutex to prevent concurrent memory page configuration.
+ * @suspend_mask: Suspended sensor bitmask.
+ * @enable_mask: Enabled sensor bitmask.
+ * @fifo_mask: Enabled hw FIFO bitmask.
+ * @ts_gain: Hw timestamp rate after internal calibration.
+ * @ts_sip: Total number of timestamp samples in a given pattern.
+ * @sip: Total number of samples (acc/gyro/ts) in a given pattern.
+ * @buff: Device read buffer.
+ * @irq_routing: pointer to interrupt routing configuration.
+ * @event_threshold: wakeup event threshold.
+ * @enable_event: enabled event bitmask.
+ * @iio_devs: Pointers to acc/gyro iio_dev instances.
+ * @settings: Pointer to the specific sensor settings in use.
+ * @orientation: sensor chip orientation relative to main hardware.
+ * @scan: Temporary buffers used to align data before iio_push_to_buffers()
+ */
+struct st_lsm6dsx_hw {
+ struct device *dev;
+ struct regmap *regmap;
+ int irq;
+
+ struct mutex fifo_lock;
+ struct mutex conf_lock;
+ struct mutex page_lock;
+
+ u8 suspend_mask;
+ u8 enable_mask;
+ u8 fifo_mask;
+ s64 ts_gain;
+ u8 ts_sip;
+ u8 sip;
+
+ const struct st_lsm6dsx_reg *irq_routing;
+ u8 event_threshold;
+ u8 enable_event;
+
+ u8 *buff;
+
+ struct iio_dev *iio_devs[ST_LSM6DSX_ID_MAX];
+
+ const struct st_lsm6dsx_settings *settings;
+
+ struct iio_mount_matrix orientation;
+ /* Ensure natural alignment of buffer elements */
+ struct {
+ __le16 channels[3];
+ s64 ts __aligned(8);
+ } scan[ST_LSM6DSX_ID_MAX];
+};
+
+static __maybe_unused const struct iio_event_spec st_lsm6dsx_event = {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE)
+};
+
+static __maybe_unused const unsigned long st_lsm6dsx_available_scan_masks[] = {
+ 0x7, 0x0,
+};
+
+extern const struct dev_pm_ops st_lsm6dsx_pm_ops;
+
+int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
+ struct regmap *regmap);
+int st_lsm6dsx_sensor_set_enable(struct st_lsm6dsx_sensor *sensor,
+ bool enable);
+int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val);
+int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor,
+ u16 watermark);
+int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable);
+int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_resume_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u32 odr, u8 *val);
+int st_lsm6dsx_shub_probe(struct st_lsm6dsx_hw *hw, const char *name);
+int st_lsm6dsx_shub_set_enable(struct st_lsm6dsx_sensor *sensor, bool enable);
+int st_lsm6dsx_shub_read_output(struct st_lsm6dsx_hw *hw, u8 *data, int len);
+int st_lsm6dsx_set_page(struct st_lsm6dsx_hw *hw, bool enable);
+
+static inline int
+st_lsm6dsx_update_bits_locked(struct st_lsm6dsx_hw *hw, unsigned int addr,
+ unsigned int mask, unsigned int val)
+{
+ int err;
+
+ mutex_lock(&hw->page_lock);
+ err = regmap_update_bits(hw->regmap, addr, mask, val);
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+static inline int
+st_lsm6dsx_read_locked(struct st_lsm6dsx_hw *hw, unsigned int addr,
+ void *val, unsigned int len)
+{
+ int err;
+
+ mutex_lock(&hw->page_lock);
+ err = regmap_bulk_read(hw->regmap, addr, val, len);
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+static inline int
+st_lsm6dsx_write_locked(struct st_lsm6dsx_hw *hw, unsigned int addr,
+ unsigned int val)
+{
+ int err;
+
+ mutex_lock(&hw->page_lock);
+ err = regmap_write(hw->regmap, addr, val);
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+static inline const struct iio_mount_matrix *
+st_lsm6dsx_get_mount_matrix(const struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ return &hw->orientation;
+}
+
+static inline int
+st_lsm6dsx_device_set_enable(struct st_lsm6dsx_sensor *sensor, bool enable)
+{
+ if (sensor->id == ST_LSM6DSX_ID_EXT0 ||
+ sensor->id == ST_LSM6DSX_ID_EXT1 ||
+ sensor->id == ST_LSM6DSX_ID_EXT2)
+ return st_lsm6dsx_shub_set_enable(sensor, enable);
+
+ return st_lsm6dsx_sensor_set_enable(sensor, enable);
+}
+
+static const
+struct iio_chan_spec_ext_info __maybe_unused st_lsm6dsx_ext_info[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_lsm6dsx_get_mount_matrix),
+ { }
+};
+
+#endif /* ST_LSM6DSX_H */
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
new file mode 100644
index 0000000000..066fe561c5
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -0,0 +1,789 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics st_lsm6dsx FIFO buffer library driver
+ *
+ * LSM6DS3/LSM6DS3H/LSM6DSL/LSM6DSM/ISM330DLC/LSM6DS3TR-C:
+ * The FIFO buffer can be configured to store data from gyroscope and
+ * accelerometer. Samples are queued without any tag according to a
+ * specific pattern based on 'FIFO data sets' (6 bytes each):
+ * - 1st data set is reserved for gyroscope data
+ * - 2nd data set is reserved for accelerometer data
+ * The FIFO pattern changes depending on the ODRs and decimation factors
+ * assigned to the FIFO data sets. The first sequence of data stored in FIFO
+ * buffer contains the data of all the enabled FIFO data sets
+ * (e.g. Gx, Gy, Gz, Ax, Ay, Az), then data are repeated depending on the
+ * value of the decimation factor and ODR set for each FIFO data set.
+ *
+ * LSM6DSO/LSM6DSOX/ASM330LHH/ASM330LHHX/LSM6DSR/LSM6DSRX/ISM330DHCX/
+ * LSM6DST/LSM6DSOP/LSM6DSTX/LSM6DSV/ASM330LHB:
+ * The FIFO buffer can be configured to store data from gyroscope and
+ * accelerometer. Each sample is queued with a tag (1B) indicating data
+ * source (gyroscope, accelerometer, hw timer).
+ *
+ * FIFO supported modes:
+ * - BYPASS: FIFO disabled
+ * - CONTINUOUS: FIFO enabled. When the buffer is full, the FIFO index
+ * restarts from the beginning and the oldest sample is overwritten
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+#include <linux/module.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/regmap.h>
+#include <linux/bitfield.h>
+
+#include <linux/platform_data/st_sensors_pdata.h>
+
+#include "st_lsm6dsx.h"
+
+#define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a
+#define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0)
+#define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3)
+#define ST_LSM6DSX_FIFO_EMPTY_MASK BIT(12)
+#define ST_LSM6DSX_REG_FIFO_OUTL_ADDR 0x3e
+#define ST_LSM6DSX_REG_FIFO_OUT_TAG_ADDR 0x78
+#define ST_LSM6DSX_REG_TS_RESET_ADDR 0x42
+
+#define ST_LSM6DSX_MAX_FIFO_ODR_VAL 0x08
+
+#define ST_LSM6DSX_TS_RESET_VAL 0xaa
+
+struct st_lsm6dsx_decimator_entry {
+ u8 decimator;
+ u8 val;
+};
+
+enum st_lsm6dsx_fifo_tag {
+ ST_LSM6DSX_GYRO_TAG = 0x01,
+ ST_LSM6DSX_ACC_TAG = 0x02,
+ ST_LSM6DSX_TS_TAG = 0x04,
+ ST_LSM6DSX_EXT0_TAG = 0x0f,
+ ST_LSM6DSX_EXT1_TAG = 0x10,
+ ST_LSM6DSX_EXT2_TAG = 0x11,
+};
+
+static const
+struct st_lsm6dsx_decimator_entry st_lsm6dsx_decimator_table[] = {
+ { 0, 0x0 },
+ { 1, 0x1 },
+ { 2, 0x2 },
+ { 3, 0x3 },
+ { 4, 0x4 },
+ { 8, 0x5 },
+ { 16, 0x6 },
+ { 32, 0x7 },
+};
+
+static int
+st_lsm6dsx_get_decimator_val(struct st_lsm6dsx_sensor *sensor, u32 max_odr)
+{
+ const int max_size = ARRAY_SIZE(st_lsm6dsx_decimator_table);
+ u32 decimator = max_odr / sensor->odr;
+ int i;
+
+ if (decimator > 1)
+ decimator = round_down(decimator, 2);
+
+ for (i = 0; i < max_size; i++) {
+ if (st_lsm6dsx_decimator_table[i].decimator == decimator)
+ break;
+ }
+
+ sensor->decimator = decimator;
+ return i == max_size ? 0 : st_lsm6dsx_decimator_table[i].val;
+}
+
+static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw,
+ u32 *max_odr, u32 *min_odr)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ int i;
+
+ *max_odr = 0, *min_odr = ~0;
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ sensor = iio_priv(hw->iio_devs[i]);
+
+ if (!(hw->enable_mask & BIT(sensor->id)))
+ continue;
+
+ *max_odr = max_t(u32, *max_odr, sensor->odr);
+ *min_odr = min_t(u32, *min_odr, sensor->odr);
+ }
+}
+
+static u8 st_lsm6dsx_get_sip(struct st_lsm6dsx_sensor *sensor, u32 min_odr)
+{
+ u8 sip = sensor->odr / min_odr;
+
+ return sip > 1 ? round_down(sip, 2) : sip;
+}
+
+static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_reg *ts_dec_reg;
+ struct st_lsm6dsx_sensor *sensor;
+ u16 sip = 0, ts_sip = 0;
+ u32 max_odr, min_odr;
+ int err = 0, i;
+ u8 data;
+
+ st_lsm6dsx_get_max_min_odr(hw, &max_odr, &min_odr);
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ const struct st_lsm6dsx_reg *dec_reg;
+
+ if (!hw->iio_devs[i])
+ continue;
+
+ sensor = iio_priv(hw->iio_devs[i]);
+ /* update fifo decimators and sample in pattern */
+ if (hw->enable_mask & BIT(sensor->id)) {
+ sensor->sip = st_lsm6dsx_get_sip(sensor, min_odr);
+ data = st_lsm6dsx_get_decimator_val(sensor, max_odr);
+ } else {
+ sensor->sip = 0;
+ data = 0;
+ }
+ ts_sip = max_t(u16, ts_sip, sensor->sip);
+
+ dec_reg = &hw->settings->decimator[sensor->id];
+ if (dec_reg->addr) {
+ int val = ST_LSM6DSX_SHIFT_VAL(data, dec_reg->mask);
+
+ err = st_lsm6dsx_update_bits_locked(hw, dec_reg->addr,
+ dec_reg->mask,
+ val);
+ if (err < 0)
+ return err;
+ }
+ sip += sensor->sip;
+ }
+ hw->sip = sip + ts_sip;
+ hw->ts_sip = ts_sip;
+
+ /*
+ * update hw ts decimator if necessary. Decimator for hw timestamp
+ * is always 1 or 0 in order to have a ts sample for each data
+ * sample in FIFO
+ */
+ ts_dec_reg = &hw->settings->ts_settings.decimator;
+ if (ts_dec_reg->addr) {
+ int val, ts_dec = !!hw->ts_sip;
+
+ val = ST_LSM6DSX_SHIFT_VAL(ts_dec, ts_dec_reg->mask);
+ err = st_lsm6dsx_update_bits_locked(hw, ts_dec_reg->addr,
+ ts_dec_reg->mask, val);
+ }
+ return err;
+}
+
+static int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
+ enum st_lsm6dsx_fifo_mode fifo_mode)
+{
+ unsigned int data;
+
+ data = FIELD_PREP(ST_LSM6DSX_FIFO_MODE_MASK, fifo_mode);
+ return st_lsm6dsx_update_bits_locked(hw, ST_LSM6DSX_REG_FIFO_MODE_ADDR,
+ ST_LSM6DSX_FIFO_MODE_MASK, data);
+}
+
+static int st_lsm6dsx_set_fifo_odr(struct st_lsm6dsx_sensor *sensor,
+ bool enable)
+{
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ const struct st_lsm6dsx_reg *batch_reg;
+ u8 data;
+
+ batch_reg = &hw->settings->batch[sensor->id];
+ if (batch_reg->addr) {
+ int val;
+
+ if (enable) {
+ int err;
+
+ err = st_lsm6dsx_check_odr(sensor, sensor->odr,
+ &data);
+ if (err < 0)
+ return err;
+ } else {
+ data = 0;
+ }
+ val = ST_LSM6DSX_SHIFT_VAL(data, batch_reg->mask);
+ return st_lsm6dsx_update_bits_locked(hw, batch_reg->addr,
+ batch_reg->mask, val);
+ } else {
+ data = hw->enable_mask ? ST_LSM6DSX_MAX_FIFO_ODR_VAL : 0;
+ return st_lsm6dsx_update_bits_locked(hw,
+ ST_LSM6DSX_REG_FIFO_MODE_ADDR,
+ ST_LSM6DSX_FIFO_ODR_MASK,
+ FIELD_PREP(ST_LSM6DSX_FIFO_ODR_MASK,
+ data));
+ }
+}
+
+int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark)
+{
+ u16 fifo_watermark = ~0, cur_watermark, fifo_th_mask;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ struct st_lsm6dsx_sensor *cur_sensor;
+ int i, err, data;
+ __le16 wdata;
+
+ if (!hw->sip)
+ return 0;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ cur_sensor = iio_priv(hw->iio_devs[i]);
+
+ if (!(hw->enable_mask & BIT(cur_sensor->id)))
+ continue;
+
+ cur_watermark = (cur_sensor == sensor) ? watermark
+ : cur_sensor->watermark;
+
+ fifo_watermark = min_t(u16, fifo_watermark, cur_watermark);
+ }
+
+ fifo_watermark = max_t(u16, fifo_watermark, hw->sip);
+ fifo_watermark = (fifo_watermark / hw->sip) * hw->sip;
+ fifo_watermark = fifo_watermark * hw->settings->fifo_ops.th_wl;
+
+ mutex_lock(&hw->page_lock);
+ err = regmap_read(hw->regmap, hw->settings->fifo_ops.fifo_th.addr + 1,
+ &data);
+ if (err < 0)
+ goto out;
+
+ fifo_th_mask = hw->settings->fifo_ops.fifo_th.mask;
+ fifo_watermark = ((data << 8) & ~fifo_th_mask) |
+ (fifo_watermark & fifo_th_mask);
+
+ wdata = cpu_to_le16(fifo_watermark);
+ err = regmap_bulk_write(hw->regmap,
+ hw->settings->fifo_ops.fifo_th.addr,
+ &wdata, sizeof(wdata));
+out:
+ mutex_unlock(&hw->page_lock);
+ return err;
+}
+
+static int st_lsm6dsx_reset_hw_ts(struct st_lsm6dsx_hw *hw)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ int i, err;
+
+ /* reset hw ts counter */
+ err = st_lsm6dsx_write_locked(hw, ST_LSM6DSX_REG_TS_RESET_ADDR,
+ ST_LSM6DSX_TS_RESET_VAL);
+ if (err < 0)
+ return err;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ sensor = iio_priv(hw->iio_devs[i]);
+ /*
+ * store enable buffer timestamp as reference for
+ * hw timestamp
+ */
+ sensor->ts_ref = iio_get_time_ns(hw->iio_devs[i]);
+ }
+ return 0;
+}
+
+int st_lsm6dsx_resume_fifo(struct st_lsm6dsx_hw *hw)
+{
+ int err;
+
+ /* reset hw ts counter */
+ err = st_lsm6dsx_reset_hw_ts(hw);
+ if (err < 0)
+ return err;
+
+ return st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT);
+}
+
+/*
+ * Set max bulk read to ST_LSM6DSX_MAX_WORD_LEN/ST_LSM6DSX_MAX_TAGGED_WORD_LEN
+ * in order to avoid a kmalloc for each bus access
+ */
+static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 addr,
+ u8 *data, unsigned int data_len,
+ unsigned int max_word_len)
+{
+ unsigned int word_len, read_len = 0;
+ int err;
+
+ while (read_len < data_len) {
+ word_len = min_t(unsigned int, data_len - read_len,
+ max_word_len);
+ err = st_lsm6dsx_read_locked(hw, addr, data + read_len,
+ word_len);
+ if (err < 0)
+ return err;
+ read_len += word_len;
+ }
+ return 0;
+}
+
+#define ST_LSM6DSX_IIO_BUFF_SIZE (ALIGN(ST_LSM6DSX_SAMPLE_SIZE, \
+ sizeof(s64)) + sizeof(s64))
+/**
+ * st_lsm6dsx_read_fifo() - hw FIFO read routine
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ *
+ * Read samples from the hw FIFO and push them to IIO buffers.
+ *
+ * Return: Number of bytes read from the FIFO
+ */
+int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
+{
+ struct st_lsm6dsx_sensor *acc_sensor, *gyro_sensor, *ext_sensor = NULL;
+ int err, sip, acc_sip, gyro_sip, ts_sip, ext_sip, read_len, offset;
+ u16 fifo_len, pattern_len = hw->sip * ST_LSM6DSX_SAMPLE_SIZE;
+ u16 fifo_diff_mask = hw->settings->fifo_ops.fifo_diff.mask;
+ bool reset_ts = false;
+ __le16 fifo_status;
+ s64 ts = 0;
+
+ err = st_lsm6dsx_read_locked(hw,
+ hw->settings->fifo_ops.fifo_diff.addr,
+ &fifo_status, sizeof(fifo_status));
+ if (err < 0) {
+ dev_err(hw->dev, "failed to read fifo status (err=%d)\n",
+ err);
+ return err;
+ }
+
+ if (fifo_status & cpu_to_le16(ST_LSM6DSX_FIFO_EMPTY_MASK))
+ return 0;
+
+ fifo_len = (le16_to_cpu(fifo_status) & fifo_diff_mask) *
+ ST_LSM6DSX_CHAN_SIZE;
+ fifo_len = (fifo_len / pattern_len) * pattern_len;
+
+ acc_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ gyro_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_GYRO]);
+ if (hw->iio_devs[ST_LSM6DSX_ID_EXT0])
+ ext_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_EXT0]);
+
+ for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
+ err = st_lsm6dsx_read_block(hw, ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
+ hw->buff, pattern_len,
+ ST_LSM6DSX_MAX_WORD_LEN);
+ if (err < 0) {
+ dev_err(hw->dev,
+ "failed to read pattern from fifo (err=%d)\n",
+ err);
+ return err;
+ }
+
+ /*
+ * Data are written to the FIFO with a specific pattern
+ * depending on the configured ODRs. The first sequence of data
+ * stored in FIFO contains the data of all enabled sensors
+ * (e.g. Gx, Gy, Gz, Ax, Ay, Az, Ts), then data are repeated
+ * depending on the value of the decimation factor set for each
+ * sensor.
+ *
+ * Supposing the FIFO is storing data from gyroscope and
+ * accelerometer at different ODRs:
+ * - gyroscope ODR = 208Hz, accelerometer ODR = 104Hz
+ * Since the gyroscope ODR is twice the accelerometer one, the
+ * following pattern is repeated every 9 samples:
+ * - Gx, Gy, Gz, Ax, Ay, Az, Ts, Gx, Gy, Gz, Ts, Gx, ..
+ */
+ ext_sip = ext_sensor ? ext_sensor->sip : 0;
+ gyro_sip = gyro_sensor->sip;
+ acc_sip = acc_sensor->sip;
+ ts_sip = hw->ts_sip;
+ offset = 0;
+ sip = 0;
+
+ while (acc_sip > 0 || gyro_sip > 0 || ext_sip > 0) {
+ if (gyro_sip > 0 && !(sip % gyro_sensor->decimator)) {
+ memcpy(hw->scan[ST_LSM6DSX_ID_GYRO].channels,
+ &hw->buff[offset],
+ sizeof(hw->scan[ST_LSM6DSX_ID_GYRO].channels));
+ offset += sizeof(hw->scan[ST_LSM6DSX_ID_GYRO].channels);
+ }
+ if (acc_sip > 0 && !(sip % acc_sensor->decimator)) {
+ memcpy(hw->scan[ST_LSM6DSX_ID_ACC].channels,
+ &hw->buff[offset],
+ sizeof(hw->scan[ST_LSM6DSX_ID_ACC].channels));
+ offset += sizeof(hw->scan[ST_LSM6DSX_ID_ACC].channels);
+ }
+ if (ext_sip > 0 && !(sip % ext_sensor->decimator)) {
+ memcpy(hw->scan[ST_LSM6DSX_ID_EXT0].channels,
+ &hw->buff[offset],
+ sizeof(hw->scan[ST_LSM6DSX_ID_EXT0].channels));
+ offset += sizeof(hw->scan[ST_LSM6DSX_ID_EXT0].channels);
+ }
+
+ if (ts_sip-- > 0) {
+ u8 data[ST_LSM6DSX_SAMPLE_SIZE];
+
+ memcpy(data, &hw->buff[offset], sizeof(data));
+ /*
+ * hw timestamp is 3B long and it is stored
+ * in FIFO using 6B as 4th FIFO data set
+ * according to this schema:
+ * B0 = ts[15:8], B1 = ts[23:16], B3 = ts[7:0]
+ */
+ ts = data[1] << 16 | data[0] << 8 | data[3];
+ /*
+ * check if hw timestamp engine is going to
+ * reset (the sensor generates an interrupt
+ * to signal the hw timestamp will reset in
+ * 1.638s)
+ */
+ if (!reset_ts && ts >= 0xff0000)
+ reset_ts = true;
+ ts *= hw->ts_gain;
+
+ offset += ST_LSM6DSX_SAMPLE_SIZE;
+ }
+
+ if (gyro_sip > 0 && !(sip % gyro_sensor->decimator)) {
+ /*
+ * We need to discards gyro samples during
+ * filters settling time
+ */
+ if (gyro_sensor->samples_to_discard > 0)
+ gyro_sensor->samples_to_discard--;
+ else
+ iio_push_to_buffers_with_timestamp(
+ hw->iio_devs[ST_LSM6DSX_ID_GYRO],
+ &hw->scan[ST_LSM6DSX_ID_GYRO],
+ gyro_sensor->ts_ref + ts);
+ gyro_sip--;
+ }
+ if (acc_sip > 0 && !(sip % acc_sensor->decimator)) {
+ /*
+ * We need to discards accel samples during
+ * filters settling time
+ */
+ if (acc_sensor->samples_to_discard > 0)
+ acc_sensor->samples_to_discard--;
+ else
+ iio_push_to_buffers_with_timestamp(
+ hw->iio_devs[ST_LSM6DSX_ID_ACC],
+ &hw->scan[ST_LSM6DSX_ID_ACC],
+ acc_sensor->ts_ref + ts);
+ acc_sip--;
+ }
+ if (ext_sip > 0 && !(sip % ext_sensor->decimator)) {
+ iio_push_to_buffers_with_timestamp(
+ hw->iio_devs[ST_LSM6DSX_ID_EXT0],
+ &hw->scan[ST_LSM6DSX_ID_EXT0],
+ ext_sensor->ts_ref + ts);
+ ext_sip--;
+ }
+ sip++;
+ }
+ }
+
+ if (unlikely(reset_ts)) {
+ err = st_lsm6dsx_reset_hw_ts(hw);
+ if (err < 0) {
+ dev_err(hw->dev, "failed to reset hw ts (err=%d)\n",
+ err);
+ return err;
+ }
+ }
+ return read_len;
+}
+
+#define ST_LSM6DSX_INVALID_SAMPLE 0x7ffd
+static int
+st_lsm6dsx_push_tagged_data(struct st_lsm6dsx_hw *hw, u8 tag,
+ u8 *data, s64 ts)
+{
+ s16 val = le16_to_cpu(*(__le16 *)data);
+ struct st_lsm6dsx_sensor *sensor;
+ struct iio_dev *iio_dev;
+
+ /* invalid sample during bootstrap phase */
+ if (val >= ST_LSM6DSX_INVALID_SAMPLE)
+ return -EINVAL;
+
+ /*
+ * EXT_TAG are managed in FIFO fashion so ST_LSM6DSX_EXT0_TAG
+ * corresponds to the first enabled channel, ST_LSM6DSX_EXT1_TAG
+ * to the second one and ST_LSM6DSX_EXT2_TAG to the last enabled
+ * channel
+ */
+ switch (tag) {
+ case ST_LSM6DSX_GYRO_TAG:
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_GYRO];
+ break;
+ case ST_LSM6DSX_ACC_TAG:
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_ACC];
+ break;
+ case ST_LSM6DSX_EXT0_TAG:
+ if (hw->enable_mask & BIT(ST_LSM6DSX_ID_EXT0))
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT0];
+ else if (hw->enable_mask & BIT(ST_LSM6DSX_ID_EXT1))
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT1];
+ else
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT2];
+ break;
+ case ST_LSM6DSX_EXT1_TAG:
+ if ((hw->enable_mask & BIT(ST_LSM6DSX_ID_EXT0)) &&
+ (hw->enable_mask & BIT(ST_LSM6DSX_ID_EXT1)))
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT1];
+ else
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT2];
+ break;
+ case ST_LSM6DSX_EXT2_TAG:
+ iio_dev = hw->iio_devs[ST_LSM6DSX_ID_EXT2];
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ sensor = iio_priv(iio_dev);
+ iio_push_to_buffers_with_timestamp(iio_dev, data,
+ ts + sensor->ts_ref);
+
+ return 0;
+}
+
+/**
+ * st_lsm6dsx_read_tagged_fifo() - tagged hw FIFO read routine
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ *
+ * Read samples from the hw FIFO and push them to IIO buffers.
+ *
+ * Return: Number of bytes read from the FIFO
+ */
+int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw)
+{
+ u16 pattern_len = hw->sip * ST_LSM6DSX_TAGGED_SAMPLE_SIZE;
+ u16 fifo_len, fifo_diff_mask;
+ /*
+ * Alignment needed as this can ultimately be passed to a
+ * call to iio_push_to_buffers_with_timestamp() which
+ * must be passed a buffer that is aligned to 8 bytes so
+ * as to allow insertion of a naturally aligned timestamp.
+ */
+ u8 iio_buff[ST_LSM6DSX_IIO_BUFF_SIZE] __aligned(8);
+ u8 tag;
+ bool reset_ts = false;
+ int i, err, read_len;
+ __le16 fifo_status;
+ s64 ts = 0;
+
+ err = st_lsm6dsx_read_locked(hw,
+ hw->settings->fifo_ops.fifo_diff.addr,
+ &fifo_status, sizeof(fifo_status));
+ if (err < 0) {
+ dev_err(hw->dev, "failed to read fifo status (err=%d)\n",
+ err);
+ return err;
+ }
+
+ fifo_diff_mask = hw->settings->fifo_ops.fifo_diff.mask;
+ fifo_len = (le16_to_cpu(fifo_status) & fifo_diff_mask) *
+ ST_LSM6DSX_TAGGED_SAMPLE_SIZE;
+ if (!fifo_len)
+ return 0;
+
+ for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
+ err = st_lsm6dsx_read_block(hw,
+ ST_LSM6DSX_REG_FIFO_OUT_TAG_ADDR,
+ hw->buff, pattern_len,
+ ST_LSM6DSX_MAX_TAGGED_WORD_LEN);
+ if (err < 0) {
+ dev_err(hw->dev,
+ "failed to read pattern from fifo (err=%d)\n",
+ err);
+ return err;
+ }
+
+ for (i = 0; i < pattern_len;
+ i += ST_LSM6DSX_TAGGED_SAMPLE_SIZE) {
+ memcpy(iio_buff, &hw->buff[i + ST_LSM6DSX_TAG_SIZE],
+ ST_LSM6DSX_SAMPLE_SIZE);
+
+ tag = hw->buff[i] >> 3;
+ if (tag == ST_LSM6DSX_TS_TAG) {
+ /*
+ * hw timestamp is 4B long and it is stored
+ * in FIFO according to this schema:
+ * B0 = ts[7:0], B1 = ts[15:8], B2 = ts[23:16],
+ * B3 = ts[31:24]
+ */
+ ts = le32_to_cpu(*((__le32 *)iio_buff));
+ /*
+ * check if hw timestamp engine is going to
+ * reset (the sensor generates an interrupt
+ * to signal the hw timestamp will reset in
+ * 1.638s)
+ */
+ if (!reset_ts && ts >= 0xffff0000)
+ reset_ts = true;
+ ts *= hw->ts_gain;
+ } else {
+ st_lsm6dsx_push_tagged_data(hw, tag, iio_buff,
+ ts);
+ }
+ }
+ }
+
+ if (unlikely(reset_ts)) {
+ err = st_lsm6dsx_reset_hw_ts(hw);
+ if (err < 0)
+ return err;
+ }
+ return read_len;
+}
+
+int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw)
+{
+ int err;
+
+ if (!hw->settings->fifo_ops.read_fifo)
+ return -ENOTSUPP;
+
+ mutex_lock(&hw->fifo_lock);
+
+ hw->settings->fifo_ops.read_fifo(hw);
+ err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_BYPASS);
+
+ mutex_unlock(&hw->fifo_lock);
+
+ return err;
+}
+
+static void
+st_lsm6dsx_update_samples_to_discard(struct st_lsm6dsx_sensor *sensor)
+{
+ const struct st_lsm6dsx_samples_to_discard *data;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int i;
+
+ if (sensor->id != ST_LSM6DSX_ID_GYRO &&
+ sensor->id != ST_LSM6DSX_ID_ACC)
+ return;
+
+ /* check if drdy mask is supported in hw */
+ if (hw->settings->drdy_mask.addr)
+ return;
+
+ data = &hw->settings->samples_to_discard[sensor->id];
+ for (i = 0; i < ST_LSM6DSX_ODR_LIST_SIZE; i++) {
+ if (data->val[i].milli_hz == sensor->odr) {
+ sensor->samples_to_discard = data->val[i].samples;
+ return;
+ }
+ }
+}
+
+int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable)
+{
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ u8 fifo_mask;
+ int err;
+
+ mutex_lock(&hw->conf_lock);
+
+ if (enable)
+ fifo_mask = hw->fifo_mask | BIT(sensor->id);
+ else
+ fifo_mask = hw->fifo_mask & ~BIT(sensor->id);
+
+ if (hw->fifo_mask) {
+ err = st_lsm6dsx_flush_fifo(hw);
+ if (err < 0)
+ goto out;
+ }
+
+ if (enable)
+ st_lsm6dsx_update_samples_to_discard(sensor);
+
+ err = st_lsm6dsx_device_set_enable(sensor, enable);
+ if (err < 0)
+ goto out;
+
+ err = st_lsm6dsx_set_fifo_odr(sensor, enable);
+ if (err < 0)
+ goto out;
+
+ err = st_lsm6dsx_update_decimators(hw);
+ if (err < 0)
+ goto out;
+
+ err = st_lsm6dsx_update_watermark(sensor, sensor->watermark);
+ if (err < 0)
+ goto out;
+
+ if (fifo_mask) {
+ err = st_lsm6dsx_resume_fifo(hw);
+ if (err < 0)
+ goto out;
+ }
+
+ hw->fifo_mask = fifo_mask;
+
+out:
+ mutex_unlock(&hw->conf_lock);
+
+ return err;
+}
+
+static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (!hw->settings->fifo_ops.update_fifo)
+ return -ENOTSUPP;
+
+ return hw->settings->fifo_ops.update_fifo(sensor, true);
+}
+
+static int st_lsm6dsx_buffer_postdisable(struct iio_dev *iio_dev)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (!hw->settings->fifo_ops.update_fifo)
+ return -ENOTSUPP;
+
+ return hw->settings->fifo_ops.update_fifo(sensor, false);
+}
+
+static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {
+ .preenable = st_lsm6dsx_buffer_preenable,
+ .postdisable = st_lsm6dsx_buffer_postdisable,
+};
+
+int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
+{
+ int i, ret;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ ret = devm_iio_kfifo_buffer_setup(hw->dev, hw->iio_devs[i],
+ &st_lsm6dsx_buffer_ops);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
new file mode 100644
index 0000000000..b6e6b1df8a
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -0,0 +1,2864 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics st_lsm6dsx sensor driver
+ *
+ * The ST LSM6DSx IMU MEMS series consists of 3D digital accelerometer
+ * and 3D digital gyroscope system-in-package with a digital I2C/SPI serial
+ * interface standard output.
+ * LSM6DSx IMU MEMS series has a dynamic user-selectable full-scale
+ * acceleration range of +-2/+-4/+-8/+-16 g and an angular rate range of
+ * +-125/+-245/+-500/+-1000/+-2000 dps
+ * LSM6DSx series has an integrated First-In-First-Out (FIFO) buffer
+ * allowing dynamic batching of sensor data.
+ * LSM9DSx series is similar but includes an additional magnetometer, handled
+ * by a different driver.
+ *
+ * Supported sensors:
+ * - LSM6DS3:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 12.5, 26, 52, 104, 208, 416
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ * - FIFO size: 8KB
+ *
+ * - LSM6DS3H/LSM6DSL/LSM6DSM/ISM330DLC/LSM6DS3TR-C:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 12.5, 26, 52, 104, 208, 416
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ * - FIFO size: 4KB
+ *
+ * - LSM6DSO/LSM6DSOX/ASM330LHH/ASM330LHHX/LSM6DSR/ISM330DHCX/LSM6DST/LSM6DSOP/
+ * LSM6DSTX/LSM6DSO16IS/ISM330IS:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 12.5, 26, 52, 104, 208, 416,
+ * 833
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ * - FIFO size: 3KB
+ *
+ * - LSM6DSV/LSM6DSV16X:
+ * - Accelerometer/Gyroscope supported ODR [Hz]: 7.5, 15, 30, 60, 120, 240,
+ * 480, 960
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported full-scale [dps]: +-125/+-250/+-500/+-1000/+-2000
+ * - FIFO size: 3KB
+ *
+ * - LSM9DS1/LSM6DS0:
+ * - Accelerometer supported ODR [Hz]: 10, 50, 119, 238, 476, 952
+ * - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ * - Gyroscope supported ODR [Hz]: 15, 60, 119, 238, 476, 952
+ * - Gyroscope supported full-scale [dps]: +-245/+-500/+-2000
+ * - FIFO size: 32
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/minmax.h>
+#include <linux/pm.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/bitfield.h>
+
+#include <linux/platform_data/st_sensors_pdata.h>
+
+#include "st_lsm6dsx.h"
+
+#define ST_LSM6DSX_REG_WHOAMI_ADDR 0x0f
+
+#define ST_LSM6DSX_TS_SENSITIVITY 25000UL /* 25us */
+
+static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x28, IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL_ACC(IIO_ACCEL, 0x2c, IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec st_lsm6dsx_gyro_channels[] = {
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x22, IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x24, IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x26, IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec st_lsm6ds0_gyro_channels[] = {
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x18, IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x1a, IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL(IIO_ANGL_VEL, 0x1c, IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
+ {
+ .reset = {
+ .addr = 0x22,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x22,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x22,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM9DS1_ID,
+ .name = ST_LSM9DS1_DEV_NAME,
+ .wai = 0x68,
+ }, {
+ .hw_id = ST_LSM6DS0_ID,
+ .name = ST_LSM6DS0_DEV_NAME,
+ .wai = 0x68,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6ds0_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6ds0_gyro_channels),
+ },
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x20,
+ .mask = GENMASK(7, 5),
+ },
+ .odr_avl[0] = { 10000, 0x01 },
+ .odr_avl[1] = { 50000, 0x02 },
+ .odr_avl[2] = { 119000, 0x03 },
+ .odr_avl[3] = { 238000, 0x04 },
+ .odr_avl[4] = { 476000, 0x05 },
+ .odr_avl[5] = { 952000, 0x06 },
+ .odr_len = 6,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 5),
+ },
+ .odr_avl[0] = { 14900, 0x01 },
+ .odr_avl[1] = { 59500, 0x02 },
+ .odr_avl[2] = { 119000, 0x03 },
+ .odr_avl[3] = { 238000, 0x04 },
+ .odr_avl[4] = { 476000, 0x05 },
+ .odr_avl[5] = { 952000, 0x06 },
+ .odr_len = 6,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x20,
+ .mask = GENMASK(4, 3),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(732000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(4, 3),
+ },
+
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 3,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0c,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .hla = {
+ .addr = 0x22,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x22,
+ .mask = BIT(4),
+ },
+ },
+ .fifo_ops = {
+ .max_size = 32,
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DS3_ID,
+ .name = ST_LSM6DS3_DEV_NAME,
+ .wai = 0x69,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x58,
+ .mask = BIT(0),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .decimator = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x08,
+ .mask = GENMASK(2, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x08,
+ .mask = GENMASK(5, 3),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_fifo,
+ .fifo_th = {
+ .addr = 0x06,
+ .mask = GENMASK(11, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x3a,
+ .mask = GENMASK(11, 0),
+ },
+ .max_size = 1365,
+ .th_wl = 3, /* 1LSB = 2B */
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .hr_timer = {
+ .addr = 0x5c,
+ .mask = BIT(4),
+ },
+ .fifo_en = {
+ .addr = 0x07,
+ .mask = BIT(7),
+ },
+ .decimator = {
+ .addr = 0x09,
+ .mask = GENMASK(5, 3),
+ },
+ },
+ .event_settings = {
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x1b,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DS3H_ID,
+ .name = ST_LSM6DS3H_DEV_NAME,
+ .wai = 0x69,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x58,
+ .mask = BIT(0),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .decimator = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x08,
+ .mask = GENMASK(2, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x08,
+ .mask = GENMASK(5, 3),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_fifo,
+ .fifo_th = {
+ .addr = 0x06,
+ .mask = GENMASK(11, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x3a,
+ .mask = GENMASK(11, 0),
+ },
+ .max_size = 682,
+ .th_wl = 3, /* 1LSB = 2B */
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .hr_timer = {
+ .addr = 0x5c,
+ .mask = BIT(4),
+ },
+ .fifo_en = {
+ .addr = 0x07,
+ .mask = BIT(7),
+ },
+ .decimator = {
+ .addr = 0x09,
+ .mask = GENMASK(5, 3),
+ },
+ },
+ .event_settings = {
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x1b,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DSL_ID,
+ .name = ST_LSM6DSL_DEV_NAME,
+ .wai = 0x6a,
+ }, {
+ .hw_id = ST_LSM6DSM_ID,
+ .name = ST_LSM6DSM_DEV_NAME,
+ .wai = 0x6a,
+ }, {
+ .hw_id = ST_ISM330DLC_ID,
+ .name = ST_ISM330DLC_DEV_NAME,
+ .wai = 0x6a,
+ }, {
+ .hw_id = ST_LSM6DS3TRC_ID,
+ .name = ST_LSM6DS3TRC_DEV_NAME,
+ .wai = 0x6a,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_len = 6,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .samples_to_discard = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .val[0] = { 12500, 1 },
+ .val[1] = { 26000, 1 },
+ .val[2] = { 52000, 1 },
+ .val[3] = { 104000, 2 },
+ .val[4] = { 208000, 2 },
+ .val[5] = { 416000, 2 },
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .val[0] = { 12500, 2 },
+ .val[1] = { 26000, 5 },
+ .val[2] = { 52000, 7 },
+ .val[3] = { 104000, 12 },
+ .val[4] = { 208000, 20 },
+ .val[5] = { 416000, 36 },
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x58,
+ .mask = BIT(0),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .decimator = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x08,
+ .mask = GENMASK(2, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x08,
+ .mask = GENMASK(5, 3),
+ },
+ [ST_LSM6DSX_ID_EXT0] = {
+ .addr = 0x09,
+ .mask = GENMASK(2, 0),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_fifo,
+ .fifo_th = {
+ .addr = 0x06,
+ .mask = GENMASK(10, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x3a,
+ .mask = GENMASK(10, 0),
+ },
+ .max_size = 682,
+ .th_wl = 3, /* 1LSB = 2B */
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x19,
+ .mask = BIT(5),
+ },
+ .hr_timer = {
+ .addr = 0x5c,
+ .mask = BIT(4),
+ },
+ .fifo_en = {
+ .addr = 0x07,
+ .mask = BIT(7),
+ },
+ .decimator = {
+ .addr = 0x09,
+ .mask = GENMASK(5, 3),
+ },
+ },
+ .shub_settings = {
+ .page_mux = {
+ .addr = 0x01,
+ .mask = BIT(7),
+ },
+ .master_en = {
+ .addr = 0x1a,
+ .mask = BIT(0),
+ },
+ .pullup_en = {
+ .addr = 0x1a,
+ .mask = BIT(3),
+ },
+ .aux_sens = {
+ .addr = 0x04,
+ .mask = GENMASK(5, 4),
+ },
+ .wr_once = {
+ .addr = 0x07,
+ .mask = BIT(5),
+ },
+ .emb_func = {
+ .addr = 0x19,
+ .mask = BIT(2),
+ },
+ .num_ext_dev = 1,
+ .shub_out = {
+ .addr = 0x2e,
+ },
+ .slv0_addr = 0x02,
+ .dw_slv0_addr = 0x0e,
+ .pause = 0x7,
+ },
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x1b,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DSR_ID,
+ .name = ST_LSM6DSR_DEV_NAME,
+ .wai = 0x6b,
+ }, {
+ .hw_id = ST_ISM330DHCX_ID,
+ .name = ST_ISM330DHCX_DEV_NAME,
+ .wai = 0x6b,
+ }, {
+ .hw_id = ST_LSM6DSRX_ID,
+ .name = ST_LSM6DSRX_DEV_NAME,
+ .wai = 0x6b,
+ }, {
+ .hw_id = ST_LSM6DSO_ID,
+ .name = ST_LSM6DSO_DEV_NAME,
+ .wai = 0x6c,
+ }, {
+ .hw_id = ST_LSM6DSOX_ID,
+ .name = ST_LSM6DSOX_DEV_NAME,
+ .wai = 0x6c,
+ }, {
+ .hw_id = ST_LSM6DST_ID,
+ .name = ST_LSM6DST_DEV_NAME,
+ .wai = 0x6d,
+ }, {
+ .hw_id = ST_ASM330LHHX_ID,
+ .name = ST_ASM330LHHX_DEV_NAME,
+ .wai = 0x6b,
+ }, {
+ .hw_id = ST_LSM6DSTX_ID,
+ .name = ST_LSM6DSTX_DEV_NAME,
+ .wai = 0x6d,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .drdy_mask = {
+ .addr = 0x13,
+ .mask = BIT(3),
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x56,
+ .mask = BIT(0),
+ },
+ .clear_on_read = {
+ .addr = 0x56,
+ .mask = BIT(6),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .batch = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x09,
+ .mask = GENMASK(3, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x09,
+ .mask = GENMASK(7, 4),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_tagged_fifo,
+ .fifo_th = {
+ .addr = 0x07,
+ .mask = GENMASK(8, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x3a,
+ .mask = GENMASK(9, 0),
+ },
+ .max_size = 512,
+ .th_wl = 1,
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x19,
+ .mask = BIT(5),
+ },
+ .decimator = {
+ .addr = 0x0a,
+ .mask = GENMASK(7, 6),
+ },
+ .freq_fine = 0x63,
+ },
+ .shub_settings = {
+ .page_mux = {
+ .addr = 0x01,
+ .mask = BIT(6),
+ },
+ .master_en = {
+ .sec_page = true,
+ .addr = 0x14,
+ .mask = BIT(2),
+ },
+ .pullup_en = {
+ .sec_page = true,
+ .addr = 0x14,
+ .mask = BIT(3),
+ },
+ .aux_sens = {
+ .addr = 0x14,
+ .mask = GENMASK(1, 0),
+ },
+ .wr_once = {
+ .addr = 0x14,
+ .mask = BIT(6),
+ },
+ .num_ext_dev = 3,
+ .shub_out = {
+ .sec_page = true,
+ .addr = 0x02,
+ },
+ .slv0_addr = 0x15,
+ .dw_slv0_addr = 0x21,
+ .batch_en = BIT(3),
+ },
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5b,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x1b,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_ASM330LHH_ID,
+ .name = ST_ASM330LHH_DEV_NAME,
+ .wai = 0x6b,
+ }, {
+ .hw_id = ST_LSM6DSOP_ID,
+ .name = ST_LSM6DSOP_DEV_NAME,
+ .wai = 0x6c,
+ }, {
+ .hw_id = ST_ASM330LHB_ID,
+ .name = ST_ASM330LHB_DEV_NAME,
+ .wai = 0x6b,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .drdy_mask = {
+ .addr = 0x13,
+ .mask = BIT(3),
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x56,
+ .mask = BIT(0),
+ },
+ .clear_on_read = {
+ .addr = 0x56,
+ .mask = BIT(6),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .batch = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x09,
+ .mask = GENMASK(3, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x09,
+ .mask = GENMASK(7, 4),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_tagged_fifo,
+ .fifo_th = {
+ .addr = 0x07,
+ .mask = GENMASK(8, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x3a,
+ .mask = GENMASK(9, 0),
+ },
+ .max_size = 512,
+ .th_wl = 1,
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x19,
+ .mask = BIT(5),
+ },
+ .decimator = {
+ .addr = 0x0a,
+ .mask = GENMASK(7, 6),
+ },
+ .freq_fine = 0x63,
+ },
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x58,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5B,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x1b,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DSV_ID,
+ .name = ST_LSM6DSV_DEV_NAME,
+ .wai = 0x70,
+ }, {
+ .hw_id = ST_LSM6DSV16X_ID,
+ .name = ST_LSM6DSV16X_DEV_NAME,
+ .wai = 0x70,
+ },
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .drdy_mask = {
+ .addr = 0x13,
+ .mask = BIT(3),
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 0),
+ },
+ .odr_avl[0] = { 7500, 0x02 },
+ .odr_avl[1] = { 15000, 0x03 },
+ .odr_avl[2] = { 30000, 0x04 },
+ .odr_avl[3] = { 60000, 0x05 },
+ .odr_avl[4] = { 120000, 0x06 },
+ .odr_avl[5] = { 240000, 0x07 },
+ .odr_avl[6] = { 480000, 0x08 },
+ .odr_avl[7] = { 960000, 0x09 },
+ .odr_len = 8,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 0),
+ },
+ .odr_avl[0] = { 7500, 0x02 },
+ .odr_avl[1] = { 15000, 0x03 },
+ .odr_avl[2] = { 30000, 0x04 },
+ .odr_avl[3] = { 60000, 0x05 },
+ .odr_avl[4] = { 120000, 0x06 },
+ .odr_avl[5] = { 240000, 0x07 },
+ .odr_avl[6] = { 480000, 0x08 },
+ .odr_avl[7] = { 960000, 0x09 },
+ .odr_len = 8,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x17,
+ .mask = GENMASK(1, 0),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x1 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x2 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x3 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x15,
+ .mask = GENMASK(3, 0),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x1 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x2 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x3 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x4 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .irq1 = {
+ .addr = 0x0d,
+ .mask = BIT(3),
+ },
+ .irq2 = {
+ .addr = 0x0e,
+ .mask = BIT(3),
+ },
+ .lir = {
+ .addr = 0x56,
+ .mask = BIT(0),
+ },
+ .irq1_func = {
+ .addr = 0x5e,
+ .mask = BIT(5),
+ },
+ .irq2_func = {
+ .addr = 0x5f,
+ .mask = BIT(5),
+ },
+ .hla = {
+ .addr = 0x03,
+ .mask = BIT(4),
+ },
+ .od = {
+ .addr = 0x03,
+ .mask = BIT(3),
+ },
+ },
+ .batch = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .addr = 0x09,
+ .mask = GENMASK(3, 0),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .addr = 0x09,
+ .mask = GENMASK(7, 4),
+ },
+ },
+ .fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
+ .read_fifo = st_lsm6dsx_read_tagged_fifo,
+ .fifo_th = {
+ .addr = 0x07,
+ .mask = GENMASK(7, 0),
+ },
+ .fifo_diff = {
+ .addr = 0x1b,
+ .mask = GENMASK(8, 0),
+ },
+ .max_size = 512,
+ .th_wl = 1,
+ },
+ .ts_settings = {
+ .timer_en = {
+ .addr = 0x50,
+ .mask = BIT(6),
+ },
+ .decimator = {
+ .addr = 0x0a,
+ .mask = GENMASK(7, 6),
+ },
+ .freq_fine = 0x4f,
+ },
+ .shub_settings = {
+ .page_mux = {
+ .addr = 0x01,
+ .mask = BIT(6),
+ },
+ .master_en = {
+ .sec_page = true,
+ .addr = 0x14,
+ .mask = BIT(2),
+ },
+ .pullup_en = {
+ .addr = 0x03,
+ .mask = BIT(6),
+ },
+ .aux_sens = {
+ .addr = 0x14,
+ .mask = GENMASK(1, 0),
+ },
+ .wr_once = {
+ .addr = 0x14,
+ .mask = BIT(6),
+ },
+ .num_ext_dev = 3,
+ .shub_out = {
+ .sec_page = true,
+ .addr = 0x02,
+ },
+ .slv0_addr = 0x15,
+ .dw_slv0_addr = 0x21,
+ .batch_en = BIT(3),
+ },
+ .event_settings = {
+ .enable_reg = {
+ .addr = 0x50,
+ .mask = BIT(7),
+ },
+ .wakeup_reg = {
+ .addr = 0x5b,
+ .mask = GENMASK(5, 0),
+ },
+ .wakeup_src_reg = 0x45,
+ .wakeup_src_status_mask = BIT(3),
+ .wakeup_src_z_mask = BIT(0),
+ .wakeup_src_y_mask = BIT(1),
+ .wakeup_src_x_mask = BIT(2),
+ },
+ },
+ {
+ .reset = {
+ .addr = 0x12,
+ .mask = BIT(0),
+ },
+ .boot = {
+ .addr = 0x12,
+ .mask = BIT(7),
+ },
+ .bdu = {
+ .addr = 0x12,
+ .mask = BIT(6),
+ },
+ .id = {
+ {
+ .hw_id = ST_LSM6DSO16IS_ID,
+ .name = ST_LSM6DSO16IS_DEV_NAME,
+ .wai = 0x22,
+ }, {
+ .hw_id = ST_ISM330IS_ID,
+ .name = ST_ISM330IS_DEV_NAME,
+ .wai = 0x22,
+ }
+ },
+ .channels = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .chan = st_lsm6dsx_acc_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_acc_channels),
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .chan = st_lsm6dsx_gyro_channels,
+ .len = ARRAY_SIZE(st_lsm6dsx_gyro_channels),
+ },
+ },
+ .odr_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(7, 4),
+ },
+ .odr_avl[0] = { 12500, 0x01 },
+ .odr_avl[1] = { 26000, 0x02 },
+ .odr_avl[2] = { 52000, 0x03 },
+ .odr_avl[3] = { 104000, 0x04 },
+ .odr_avl[4] = { 208000, 0x05 },
+ .odr_avl[5] = { 416000, 0x06 },
+ .odr_avl[6] = { 833000, 0x07 },
+ .odr_len = 7,
+ },
+ },
+ .fs_table = {
+ [ST_LSM6DSX_ID_ACC] = {
+ .reg = {
+ .addr = 0x10,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_G_TO_M_S_2(61000), 0x0 },
+ .fs_avl[1] = { IIO_G_TO_M_S_2(122000), 0x2 },
+ .fs_avl[2] = { IIO_G_TO_M_S_2(244000), 0x3 },
+ .fs_avl[3] = { IIO_G_TO_M_S_2(488000), 0x1 },
+ .fs_len = 4,
+ },
+ [ST_LSM6DSX_ID_GYRO] = {
+ .reg = {
+ .addr = 0x11,
+ .mask = GENMASK(3, 2),
+ },
+ .fs_avl[0] = { IIO_DEGREE_TO_RAD(8750000), 0x0 },
+ .fs_avl[1] = { IIO_DEGREE_TO_RAD(17500000), 0x1 },
+ .fs_avl[2] = { IIO_DEGREE_TO_RAD(35000000), 0x2 },
+ .fs_avl[3] = { IIO_DEGREE_TO_RAD(70000000), 0x3 },
+ .fs_len = 4,
+ },
+ },
+ .irq_config = {
+ .hla = {
+ .addr = 0x12,
+ .mask = BIT(5),
+ },
+ .od = {
+ .addr = 0x12,
+ .mask = BIT(4),
+ },
+ },
+ .shub_settings = {
+ .page_mux = {
+ .addr = 0x01,
+ .mask = BIT(6),
+ },
+ .master_en = {
+ .sec_page = true,
+ .addr = 0x14,
+ .mask = BIT(2),
+ },
+ .pullup_en = {
+ .sec_page = true,
+ .addr = 0x14,
+ .mask = BIT(3),
+ },
+ .aux_sens = {
+ .addr = 0x14,
+ .mask = GENMASK(1, 0),
+ },
+ .wr_once = {
+ .addr = 0x14,
+ .mask = BIT(6),
+ },
+ .num_ext_dev = 3,
+ .shub_out = {
+ .sec_page = true,
+ .addr = 0x02,
+ },
+ .slv0_addr = 0x15,
+ .dw_slv0_addr = 0x21,
+ },
+ },
+};
+
+int st_lsm6dsx_set_page(struct st_lsm6dsx_hw *hw, bool enable)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ unsigned int data;
+ int err;
+
+ hub_settings = &hw->settings->shub_settings;
+ data = ST_LSM6DSX_SHIFT_VAL(enable, hub_settings->page_mux.mask);
+ err = regmap_update_bits(hw->regmap, hub_settings->page_mux.addr,
+ hub_settings->page_mux.mask, data);
+ usleep_range(100, 150);
+
+ return err;
+}
+
+static int st_lsm6dsx_check_whoami(struct st_lsm6dsx_hw *hw, int id,
+ const char **name)
+{
+ int err, i, j, data;
+
+ for (i = 0; i < ARRAY_SIZE(st_lsm6dsx_sensor_settings); i++) {
+ for (j = 0; j < ST_LSM6DSX_MAX_ID; j++) {
+ if (st_lsm6dsx_sensor_settings[i].id[j].name &&
+ id == st_lsm6dsx_sensor_settings[i].id[j].hw_id)
+ break;
+ }
+ if (j < ST_LSM6DSX_MAX_ID)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(st_lsm6dsx_sensor_settings)) {
+ dev_err(hw->dev, "unsupported hw id [%02x]\n", id);
+ return -ENODEV;
+ }
+
+ err = regmap_read(hw->regmap, ST_LSM6DSX_REG_WHOAMI_ADDR, &data);
+ if (err < 0) {
+ dev_err(hw->dev, "failed to read whoami register\n");
+ return err;
+ }
+
+ if (data != st_lsm6dsx_sensor_settings[i].id[j].wai) {
+ dev_err(hw->dev, "unsupported whoami [%02x]\n", data);
+ return -ENODEV;
+ }
+
+ *name = st_lsm6dsx_sensor_settings[i].id[j].name;
+ hw->settings = &st_lsm6dsx_sensor_settings[i];
+
+ return 0;
+}
+
+static int st_lsm6dsx_set_full_scale(struct st_lsm6dsx_sensor *sensor,
+ u32 gain)
+{
+ const struct st_lsm6dsx_fs_table_entry *fs_table;
+ unsigned int data;
+ int i, err;
+
+ fs_table = &sensor->hw->settings->fs_table[sensor->id];
+ for (i = 0; i < fs_table->fs_len; i++) {
+ if (fs_table->fs_avl[i].gain == gain)
+ break;
+ }
+
+ if (i == fs_table->fs_len)
+ return -EINVAL;
+
+ data = ST_LSM6DSX_SHIFT_VAL(fs_table->fs_avl[i].val,
+ fs_table->reg.mask);
+ err = st_lsm6dsx_update_bits_locked(sensor->hw, fs_table->reg.addr,
+ fs_table->reg.mask, data);
+ if (err < 0)
+ return err;
+
+ sensor->gain = gain;
+
+ return 0;
+}
+
+int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u32 odr, u8 *val)
+{
+ const struct st_lsm6dsx_odr_table_entry *odr_table;
+ int i;
+
+ odr_table = &sensor->hw->settings->odr_table[sensor->id];
+ for (i = 0; i < odr_table->odr_len; i++) {
+ /*
+ * ext devices can run at different odr respect to
+ * accel sensor
+ */
+ if (odr_table->odr_avl[i].milli_hz >= odr)
+ break;
+ }
+
+ if (i == odr_table->odr_len)
+ return -EINVAL;
+
+ *val = odr_table->odr_avl[i].val;
+ return odr_table->odr_avl[i].milli_hz;
+}
+
+static int
+st_lsm6dsx_check_odr_dependency(struct st_lsm6dsx_hw *hw, u32 odr,
+ enum st_lsm6dsx_sensor_id id)
+{
+ struct st_lsm6dsx_sensor *ref = iio_priv(hw->iio_devs[id]);
+
+ if (odr > 0) {
+ if (hw->enable_mask & BIT(id))
+ return max_t(u32, ref->odr, odr);
+ else
+ return odr;
+ } else {
+ return (hw->enable_mask & BIT(id)) ? ref->odr : 0;
+ }
+}
+
+static int
+st_lsm6dsx_set_odr(struct st_lsm6dsx_sensor *sensor, u32 req_odr)
+{
+ struct st_lsm6dsx_sensor *ref_sensor = sensor;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ const struct st_lsm6dsx_reg *reg;
+ unsigned int data;
+ u8 val = 0;
+ int err;
+
+ switch (sensor->id) {
+ case ST_LSM6DSX_ID_GYRO:
+ break;
+ case ST_LSM6DSX_ID_EXT0:
+ case ST_LSM6DSX_ID_EXT1:
+ case ST_LSM6DSX_ID_EXT2:
+ case ST_LSM6DSX_ID_ACC: {
+ u32 odr;
+ int i;
+
+ /*
+ * i2c embedded controller relies on the accelerometer sensor as
+ * bus read/write trigger so we need to enable accel device
+ * at odr = max(accel_odr, ext_odr) in order to properly
+ * communicate with i2c slave devices
+ */
+ ref_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ for (i = ST_LSM6DSX_ID_ACC; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i] || i == sensor->id)
+ continue;
+
+ odr = st_lsm6dsx_check_odr_dependency(hw, req_odr, i);
+ if (odr != req_odr)
+ /* device already configured */
+ return 0;
+ }
+ break;
+ }
+ default: /* should never occur */
+ return -EINVAL;
+ }
+
+ if (req_odr > 0) {
+ err = st_lsm6dsx_check_odr(ref_sensor, req_odr, &val);
+ if (err < 0)
+ return err;
+ }
+
+ reg = &hw->settings->odr_table[ref_sensor->id].reg;
+ data = ST_LSM6DSX_SHIFT_VAL(val, reg->mask);
+ return st_lsm6dsx_update_bits_locked(hw, reg->addr, reg->mask, data);
+}
+
+static int
+__st_lsm6dsx_sensor_set_enable(struct st_lsm6dsx_sensor *sensor,
+ bool enable)
+{
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ u32 odr = enable ? sensor->odr : 0;
+ int err;
+
+ err = st_lsm6dsx_set_odr(sensor, odr);
+ if (err < 0)
+ return err;
+
+ if (enable)
+ hw->enable_mask |= BIT(sensor->id);
+ else
+ hw->enable_mask &= ~BIT(sensor->id);
+
+ return 0;
+}
+
+static int
+st_lsm6dsx_check_events(struct st_lsm6dsx_sensor *sensor, bool enable)
+{
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (sensor->id == ST_LSM6DSX_ID_GYRO || enable)
+ return 0;
+
+ return hw->enable_event;
+}
+
+int st_lsm6dsx_sensor_set_enable(struct st_lsm6dsx_sensor *sensor,
+ bool enable)
+{
+ if (st_lsm6dsx_check_events(sensor, enable))
+ return 0;
+
+ return __st_lsm6dsx_sensor_set_enable(sensor, enable);
+}
+
+static int st_lsm6dsx_read_oneshot(struct st_lsm6dsx_sensor *sensor,
+ u8 addr, int *val)
+{
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err, delay;
+ __le16 data;
+
+ err = st_lsm6dsx_sensor_set_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ /*
+ * we need to wait for sensor settling time before
+ * reading data in order to avoid corrupted samples
+ */
+ delay = 1000000000 / sensor->odr;
+ usleep_range(3 * delay, 4 * delay);
+
+ err = st_lsm6dsx_read_locked(hw, addr, &data, sizeof(data));
+ if (err < 0)
+ return err;
+
+ if (!hw->enable_event) {
+ err = st_lsm6dsx_sensor_set_enable(sensor, false);
+ if (err < 0)
+ return err;
+ }
+
+ *val = (s16)le16_to_cpu(data);
+
+ return IIO_VAL_INT;
+}
+
+static int st_lsm6dsx_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *ch,
+ int *val, int *val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(iio_dev);
+ if (ret)
+ break;
+
+ ret = st_lsm6dsx_read_oneshot(sensor, ch->address, val);
+ iio_device_release_direct_mode(iio_dev);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = sensor->odr / 1000;
+ *val2 = (sensor->odr % 1000) * 1000;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = sensor->gain;
+ ret = IIO_VAL_INT_PLUS_NANO;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int st_lsm6dsx_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int err;
+
+ err = iio_device_claim_direct_mode(iio_dev);
+ if (err)
+ return err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ err = st_lsm6dsx_set_full_scale(sensor, val2);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ: {
+ u8 data;
+
+ val = val * 1000 + val2 / 1000;
+ val = st_lsm6dsx_check_odr(sensor, val, &data);
+ if (val < 0)
+ err = val;
+ else
+ sensor->odr = val;
+ break;
+ }
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ iio_device_release_direct_mode(iio_dev);
+
+ return err;
+}
+
+static int st_lsm6dsx_event_setup(struct st_lsm6dsx_hw *hw, int state)
+{
+ const struct st_lsm6dsx_reg *reg;
+ unsigned int data;
+ int err;
+
+ if (!hw->settings->irq_config.irq1_func.addr)
+ return -ENOTSUPP;
+
+ reg = &hw->settings->event_settings.enable_reg;
+ if (reg->addr) {
+ data = ST_LSM6DSX_SHIFT_VAL(state, reg->mask);
+ err = st_lsm6dsx_update_bits_locked(hw, reg->addr,
+ reg->mask, data);
+ if (err < 0)
+ return err;
+ }
+
+ /* Enable wakeup interrupt */
+ data = ST_LSM6DSX_SHIFT_VAL(state, hw->irq_routing->mask);
+ return st_lsm6dsx_update_bits_locked(hw, hw->irq_routing->addr,
+ hw->irq_routing->mask, data);
+}
+
+static int st_lsm6dsx_read_event(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ *val2 = 0;
+ *val = hw->event_threshold;
+
+ return IIO_VAL_INT;
+}
+
+static int
+st_lsm6dsx_write_event(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ const struct st_lsm6dsx_reg *reg;
+ unsigned int data;
+ int err;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ if (val < 0 || val > 31)
+ return -EINVAL;
+
+ reg = &hw->settings->event_settings.wakeup_reg;
+ data = ST_LSM6DSX_SHIFT_VAL(val, reg->mask);
+ err = st_lsm6dsx_update_bits_locked(hw, reg->addr,
+ reg->mask, data);
+ if (err < 0)
+ return -EINVAL;
+
+ hw->event_threshold = val;
+
+ return 0;
+}
+
+static int
+st_lsm6dsx_read_event_config(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ return !!(hw->enable_event & BIT(chan->channel2));
+}
+
+static int
+st_lsm6dsx_write_event_config(struct iio_dev *iio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ u8 enable_event;
+ int err;
+
+ if (type != IIO_EV_TYPE_THRESH)
+ return -EINVAL;
+
+ if (state) {
+ enable_event = hw->enable_event | BIT(chan->channel2);
+
+ /* do not enable events if they are already enabled */
+ if (hw->enable_event)
+ goto out;
+ } else {
+ enable_event = hw->enable_event & ~BIT(chan->channel2);
+
+ /* only turn off sensor if no events is enabled */
+ if (enable_event)
+ goto out;
+ }
+
+ /* stop here if no changes have been made */
+ if (hw->enable_event == enable_event)
+ return 0;
+
+ err = st_lsm6dsx_event_setup(hw, state);
+ if (err < 0)
+ return err;
+
+ mutex_lock(&hw->conf_lock);
+ if (enable_event || !(hw->fifo_mask & BIT(sensor->id)))
+ err = __st_lsm6dsx_sensor_set_enable(sensor, state);
+ mutex_unlock(&hw->conf_lock);
+ if (err < 0)
+ return err;
+
+out:
+ hw->enable_event = enable_event;
+
+ return 0;
+}
+
+int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int err;
+
+ val = clamp_val(val, 1, hw->settings->fifo_ops.max_size);
+
+ mutex_lock(&hw->conf_lock);
+
+ err = st_lsm6dsx_update_watermark(sensor, val);
+
+ mutex_unlock(&hw->conf_lock);
+
+ if (err < 0)
+ return err;
+
+ sensor->watermark = val;
+
+ return 0;
+}
+
+static ssize_t
+st_lsm6dsx_sysfs_sampling_frequency_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_to_iio_dev(dev));
+ const struct st_lsm6dsx_odr_table_entry *odr_table;
+ int i, len = 0;
+
+ odr_table = &sensor->hw->settings->odr_table[sensor->id];
+ for (i = 0; i < odr_table->odr_len; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%03d ",
+ odr_table->odr_avl[i].milli_hz / 1000,
+ odr_table->odr_avl[i].milli_hz % 1000);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t st_lsm6dsx_sysfs_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_to_iio_dev(dev));
+ const struct st_lsm6dsx_fs_table_entry *fs_table;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ int i, len = 0;
+
+ fs_table = &hw->settings->fs_table[sensor->id];
+ for (i = 0; i < fs_table->fs_len; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%09u ",
+ fs_table->fs_avl[i].gain);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static int st_lsm6dsx_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ANGL_VEL:
+ case IIO_ACCEL:
+ return IIO_VAL_INT_PLUS_NANO;
+ default:
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ default:
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(st_lsm6dsx_sysfs_sampling_frequency_avail);
+static IIO_DEVICE_ATTR(in_accel_scale_available, 0444,
+ st_lsm6dsx_sysfs_scale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_anglvel_scale_available, 0444,
+ st_lsm6dsx_sysfs_scale_avail, NULL, 0);
+
+static struct attribute *st_lsm6dsx_acc_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_lsm6dsx_acc_attribute_group = {
+ .attrs = st_lsm6dsx_acc_attributes,
+};
+
+static const struct iio_info st_lsm6dsx_acc_info = {
+ .attrs = &st_lsm6dsx_acc_attribute_group,
+ .read_raw = st_lsm6dsx_read_raw,
+ .write_raw = st_lsm6dsx_write_raw,
+ .read_event_value = st_lsm6dsx_read_event,
+ .write_event_value = st_lsm6dsx_write_event,
+ .read_event_config = st_lsm6dsx_read_event_config,
+ .write_event_config = st_lsm6dsx_write_event_config,
+ .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
+ .write_raw_get_fmt = st_lsm6dsx_write_raw_get_fmt,
+};
+
+static struct attribute *st_lsm6dsx_gyro_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_lsm6dsx_gyro_attribute_group = {
+ .attrs = st_lsm6dsx_gyro_attributes,
+};
+
+static const struct iio_info st_lsm6dsx_gyro_info = {
+ .attrs = &st_lsm6dsx_gyro_attribute_group,
+ .read_raw = st_lsm6dsx_read_raw,
+ .write_raw = st_lsm6dsx_write_raw,
+ .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
+ .write_raw_get_fmt = st_lsm6dsx_write_raw_get_fmt,
+};
+
+static int st_lsm6dsx_get_drdy_pin(struct st_lsm6dsx_hw *hw, int *drdy_pin)
+{
+ struct device *dev = hw->dev;
+
+ if (!dev_fwnode(dev))
+ return -EINVAL;
+
+ return device_property_read_u32(dev, "st,drdy-int-pin", drdy_pin);
+}
+
+static int
+st_lsm6dsx_get_drdy_reg(struct st_lsm6dsx_hw *hw,
+ const struct st_lsm6dsx_reg **drdy_reg)
+{
+ int err = 0, drdy_pin;
+
+ if (st_lsm6dsx_get_drdy_pin(hw, &drdy_pin) < 0) {
+ struct st_sensors_platform_data *pdata;
+ struct device *dev = hw->dev;
+
+ pdata = (struct st_sensors_platform_data *)dev->platform_data;
+ drdy_pin = pdata ? pdata->drdy_int_pin : 1;
+ }
+
+ switch (drdy_pin) {
+ case 1:
+ hw->irq_routing = &hw->settings->irq_config.irq1_func;
+ *drdy_reg = &hw->settings->irq_config.irq1;
+ break;
+ case 2:
+ hw->irq_routing = &hw->settings->irq_config.irq2_func;
+ *drdy_reg = &hw->settings->irq_config.irq2;
+ break;
+ default:
+ dev_err(hw->dev, "unsupported data ready pin\n");
+ err = -EINVAL;
+ break;
+ }
+
+ return err;
+}
+
+static int st_lsm6dsx_init_shub(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ struct st_sensors_platform_data *pdata;
+ struct device *dev = hw->dev;
+ unsigned int data;
+ int err = 0;
+
+ hub_settings = &hw->settings->shub_settings;
+
+ pdata = (struct st_sensors_platform_data *)dev->platform_data;
+ if ((dev_fwnode(dev) && device_property_read_bool(dev, "st,pullups")) ||
+ (pdata && pdata->pullups)) {
+ if (hub_settings->pullup_en.sec_page) {
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ return err;
+ }
+
+ data = ST_LSM6DSX_SHIFT_VAL(1, hub_settings->pullup_en.mask);
+ err = regmap_update_bits(hw->regmap,
+ hub_settings->pullup_en.addr,
+ hub_settings->pullup_en.mask, data);
+
+ if (hub_settings->pullup_en.sec_page)
+ st_lsm6dsx_set_page(hw, false);
+
+ if (err < 0)
+ return err;
+ }
+
+ if (hub_settings->aux_sens.addr) {
+ /* configure aux sensors */
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ return err;
+
+ data = ST_LSM6DSX_SHIFT_VAL(3, hub_settings->aux_sens.mask);
+ err = regmap_update_bits(hw->regmap,
+ hub_settings->aux_sens.addr,
+ hub_settings->aux_sens.mask, data);
+
+ st_lsm6dsx_set_page(hw, false);
+
+ if (err < 0)
+ return err;
+ }
+
+ if (hub_settings->emb_func.addr) {
+ data = ST_LSM6DSX_SHIFT_VAL(1, hub_settings->emb_func.mask);
+ err = regmap_update_bits(hw->regmap,
+ hub_settings->emb_func.addr,
+ hub_settings->emb_func.mask, data);
+ }
+
+ return err;
+}
+
+static int st_lsm6dsx_init_hw_timer(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_hw_ts_settings *ts_settings;
+ int err, val;
+
+ ts_settings = &hw->settings->ts_settings;
+ /* enable hw timestamp generation if necessary */
+ if (ts_settings->timer_en.addr) {
+ val = ST_LSM6DSX_SHIFT_VAL(1, ts_settings->timer_en.mask);
+ err = regmap_update_bits(hw->regmap,
+ ts_settings->timer_en.addr,
+ ts_settings->timer_en.mask, val);
+ if (err < 0)
+ return err;
+ }
+
+ /* enable high resolution for hw ts timer if necessary */
+ if (ts_settings->hr_timer.addr) {
+ val = ST_LSM6DSX_SHIFT_VAL(1, ts_settings->hr_timer.mask);
+ err = regmap_update_bits(hw->regmap,
+ ts_settings->hr_timer.addr,
+ ts_settings->hr_timer.mask, val);
+ if (err < 0)
+ return err;
+ }
+
+ /* enable ts queueing in FIFO if necessary */
+ if (ts_settings->fifo_en.addr) {
+ val = ST_LSM6DSX_SHIFT_VAL(1, ts_settings->fifo_en.mask);
+ err = regmap_update_bits(hw->regmap,
+ ts_settings->fifo_en.addr,
+ ts_settings->fifo_en.mask, val);
+ if (err < 0)
+ return err;
+ }
+
+ /* calibrate timestamp sensitivity */
+ hw->ts_gain = ST_LSM6DSX_TS_SENSITIVITY;
+ if (ts_settings->freq_fine) {
+ err = regmap_read(hw->regmap, ts_settings->freq_fine, &val);
+ if (err < 0)
+ return err;
+
+ /*
+ * linearize the AN5192 formula:
+ * 1 / (1 + x) ~= 1 - x (Taylor’s Series)
+ * ttrim[s] = 1 / (40000 * (1 + 0.0015 * val))
+ * ttrim[ns] ~= 25000 - 37.5 * val
+ * ttrim[ns] ~= 25000 - (37500 * val) / 1000
+ */
+ hw->ts_gain -= ((s8)val * 37500) / 1000;
+ }
+
+ return 0;
+}
+
+static int st_lsm6dsx_reset_device(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_reg *reg;
+ int err;
+
+ /*
+ * flush hw FIFO before device reset in order to avoid
+ * possible races on interrupt line 1. If the first interrupt
+ * line is asserted during hw reset the device will work in
+ * I3C-only mode (if it is supported)
+ */
+ err = st_lsm6dsx_flush_fifo(hw);
+ if (err < 0 && err != -ENOTSUPP)
+ return err;
+
+ /* device sw reset */
+ reg = &hw->settings->reset;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ msleep(50);
+
+ /* reload trimming parameter */
+ reg = &hw->settings->boot;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ msleep(50);
+
+ return 0;
+}
+
+static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_reg *reg;
+ int err;
+
+ err = st_lsm6dsx_reset_device(hw);
+ if (err < 0)
+ return err;
+
+ /* enable Block Data Update */
+ reg = &hw->settings->bdu;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ /* enable FIFO watermak interrupt */
+ err = st_lsm6dsx_get_drdy_reg(hw, &reg);
+ if (err < 0)
+ return err;
+
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ /* enable Latched interrupts for device events */
+ if (hw->settings->irq_config.lir.addr) {
+ reg = &hw->settings->irq_config.lir;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ /* enable clear on read for latched interrupts */
+ if (hw->settings->irq_config.clear_on_read.addr) {
+ reg = &hw->settings->irq_config.clear_on_read;
+ err = regmap_update_bits(hw->regmap,
+ reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+ }
+ }
+
+ /* enable drdy-mas if available */
+ if (hw->settings->drdy_mask.addr) {
+ reg = &hw->settings->drdy_mask;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+ }
+
+ err = st_lsm6dsx_init_shub(hw);
+ if (err < 0)
+ return err;
+
+ return st_lsm6dsx_init_hw_timer(hw);
+}
+
+static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
+ enum st_lsm6dsx_sensor_id id,
+ const char *name)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ struct iio_dev *iio_dev;
+
+ iio_dev = devm_iio_device_alloc(hw->dev, sizeof(*sensor));
+ if (!iio_dev)
+ return NULL;
+
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->available_scan_masks = st_lsm6dsx_available_scan_masks;
+ iio_dev->channels = hw->settings->channels[id].chan;
+ iio_dev->num_channels = hw->settings->channels[id].len;
+
+ sensor = iio_priv(iio_dev);
+ sensor->id = id;
+ sensor->hw = hw;
+ sensor->odr = hw->settings->odr_table[id].odr_avl[0].milli_hz;
+ sensor->gain = hw->settings->fs_table[id].fs_avl[0].gain;
+ sensor->watermark = 1;
+
+ switch (id) {
+ case ST_LSM6DSX_ID_ACC:
+ iio_dev->info = &st_lsm6dsx_acc_info;
+ scnprintf(sensor->name, sizeof(sensor->name), "%s_accel",
+ name);
+ break;
+ case ST_LSM6DSX_ID_GYRO:
+ iio_dev->info = &st_lsm6dsx_gyro_info;
+ scnprintf(sensor->name, sizeof(sensor->name), "%s_gyro",
+ name);
+ break;
+ default:
+ return NULL;
+ }
+ iio_dev->name = sensor->name;
+
+ return iio_dev;
+}
+
+static bool
+st_lsm6dsx_report_motion_event(struct st_lsm6dsx_hw *hw)
+{
+ const struct st_lsm6dsx_event_settings *event_settings;
+ int err, data;
+ s64 timestamp;
+
+ if (!hw->enable_event)
+ return false;
+
+ event_settings = &hw->settings->event_settings;
+ err = st_lsm6dsx_read_locked(hw, event_settings->wakeup_src_reg,
+ &data, sizeof(data));
+ if (err < 0)
+ return false;
+
+ timestamp = iio_get_time_ns(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ if ((data & hw->settings->event_settings.wakeup_src_z_mask) &&
+ (hw->enable_event & BIT(IIO_MOD_Z)))
+ iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC],
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+
+ if ((data & hw->settings->event_settings.wakeup_src_y_mask) &&
+ (hw->enable_event & BIT(IIO_MOD_Y)))
+ iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC],
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+
+ if ((data & hw->settings->event_settings.wakeup_src_x_mask) &&
+ (hw->enable_event & BIT(IIO_MOD_X)))
+ iio_push_event(hw->iio_devs[ST_LSM6DSX_ID_ACC],
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+
+ return data & event_settings->wakeup_src_status_mask;
+}
+
+static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
+{
+ struct st_lsm6dsx_hw *hw = private;
+ int fifo_len = 0, len;
+ bool event;
+
+ event = st_lsm6dsx_report_motion_event(hw);
+
+ if (!hw->settings->fifo_ops.read_fifo)
+ return event ? IRQ_HANDLED : IRQ_NONE;
+
+ /*
+ * If we are using edge IRQs, new samples can arrive while
+ * processing current interrupt since there are no hw
+ * guarantees the irq line stays "low" long enough to properly
+ * detect the new interrupt. In this case the new sample will
+ * be missed.
+ * Polling FIFO status register allow us to read new
+ * samples even if the interrupt arrives while processing
+ * previous data and the timeslot where the line is "low" is
+ * too short to be properly detected.
+ */
+ do {
+ mutex_lock(&hw->fifo_lock);
+ len = hw->settings->fifo_ops.read_fifo(hw);
+ mutex_unlock(&hw->fifo_lock);
+
+ if (len > 0)
+ fifo_len += len;
+ } while (len > 0);
+
+ return fifo_len || event ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static irqreturn_t st_lsm6dsx_sw_trigger_handler_thread(int irq,
+ void *private)
+{
+ struct iio_poll_func *pf = private;
+ struct iio_dev *iio_dev = pf->indio_dev;
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (sensor->id == ST_LSM6DSX_ID_EXT0 ||
+ sensor->id == ST_LSM6DSX_ID_EXT1 ||
+ sensor->id == ST_LSM6DSX_ID_EXT2)
+ st_lsm6dsx_shub_read_output(hw,
+ (u8 *)hw->scan[sensor->id].channels,
+ sizeof(hw->scan[sensor->id].channels));
+ else
+ st_lsm6dsx_read_locked(hw, iio_dev->channels[0].address,
+ hw->scan[sensor->id].channels,
+ sizeof(hw->scan[sensor->id].channels));
+
+ iio_push_to_buffers_with_timestamp(iio_dev, &hw->scan[sensor->id],
+ iio_get_time_ns(iio_dev));
+ iio_trigger_notify_done(iio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw)
+{
+ struct st_sensors_platform_data *pdata;
+ const struct st_lsm6dsx_reg *reg;
+ struct device *dev = hw->dev;
+ unsigned long irq_type;
+ bool irq_active_low;
+ int err;
+
+ irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq));
+
+ switch (irq_type) {
+ case IRQF_TRIGGER_HIGH:
+ case IRQF_TRIGGER_RISING:
+ irq_active_low = false;
+ break;
+ case IRQF_TRIGGER_LOW:
+ case IRQF_TRIGGER_FALLING:
+ irq_active_low = true;
+ break;
+ default:
+ dev_info(hw->dev, "mode %lx unsupported\n", irq_type);
+ return -EINVAL;
+ }
+
+ reg = &hw->settings->irq_config.hla;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(irq_active_low,
+ reg->mask));
+ if (err < 0)
+ return err;
+
+ pdata = (struct st_sensors_platform_data *)dev->platform_data;
+ if ((dev_fwnode(dev) && device_property_read_bool(dev, "drive-open-drain")) ||
+ (pdata && pdata->open_drain)) {
+ reg = &hw->settings->irq_config.od;
+ err = regmap_update_bits(hw->regmap, reg->addr, reg->mask,
+ ST_LSM6DSX_SHIFT_VAL(1, reg->mask));
+ if (err < 0)
+ return err;
+
+ irq_type |= IRQF_SHARED;
+ }
+
+ err = devm_request_threaded_irq(hw->dev, hw->irq,
+ NULL,
+ st_lsm6dsx_handler_thread,
+ irq_type | IRQF_ONESHOT,
+ "lsm6dsx", hw);
+ if (err) {
+ dev_err(hw->dev, "failed to request trigger irq %d\n",
+ hw->irq);
+ return err;
+ }
+
+ return 0;
+}
+
+static int st_lsm6dsx_sw_buffer_preenable(struct iio_dev *iio_dev)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+
+ return st_lsm6dsx_device_set_enable(sensor, true);
+}
+
+static int st_lsm6dsx_sw_buffer_postdisable(struct iio_dev *iio_dev)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+
+ return st_lsm6dsx_device_set_enable(sensor, false);
+}
+
+static const struct iio_buffer_setup_ops st_lsm6dsx_sw_buffer_ops = {
+ .preenable = st_lsm6dsx_sw_buffer_preenable,
+ .postdisable = st_lsm6dsx_sw_buffer_postdisable,
+};
+
+static int st_lsm6dsx_sw_buffers_setup(struct st_lsm6dsx_hw *hw)
+{
+ int i;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ int err;
+
+ if (!hw->iio_devs[i])
+ continue;
+
+ err = devm_iio_triggered_buffer_setup(hw->dev,
+ hw->iio_devs[i], NULL,
+ st_lsm6dsx_sw_trigger_handler_thread,
+ &st_lsm6dsx_sw_buffer_ops);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int st_lsm6dsx_init_regulators(struct device *dev)
+{
+ /* vdd-vddio power regulators */
+ static const char * const regulators[] = { "vdd", "vddio" };
+ int err;
+
+ err = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulators),
+ regulators);
+ if (err)
+ return dev_err_probe(dev, err, "failed to enable regulators\n");
+
+ msleep(50);
+
+ return 0;
+}
+
+#ifdef CONFIG_ACPI
+
+static int lsm6dsx_get_acpi_mount_matrix(struct device *dev,
+ struct iio_mount_matrix *orientation)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_device *adev = ACPI_COMPANION(dev);
+ union acpi_object *obj, *elements;
+ acpi_status status;
+ int i, j, val[3];
+ char *str;
+
+ if (!has_acpi_companion(dev))
+ return -EINVAL;
+
+ if (!acpi_has_method(adev->handle, "ROTM"))
+ return -EINVAL;
+
+ status = acpi_evaluate_object(adev->handle, "ROTM", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ dev_warn(dev, "Failed to get ACPI mount matrix: %d\n", status);
+ return -EINVAL;
+ }
+
+ obj = buffer.pointer;
+ if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 3)
+ goto unknown_format;
+
+ elements = obj->package.elements;
+ for (i = 0; i < 3; i++) {
+ if (elements[i].type != ACPI_TYPE_STRING)
+ goto unknown_format;
+
+ str = elements[i].string.pointer;
+ if (sscanf(str, "%d %d %d", &val[0], &val[1], &val[2]) != 3)
+ goto unknown_format;
+
+ for (j = 0; j < 3; j++) {
+ switch (val[j]) {
+ case -1: str = "-1"; break;
+ case 0: str = "0"; break;
+ case 1: str = "1"; break;
+ default: goto unknown_format;
+ }
+ orientation->rotation[i * 3 + j] = str;
+ }
+ }
+
+ kfree(buffer.pointer);
+ return 0;
+
+unknown_format:
+ dev_warn(dev, "Unknown ACPI mount matrix format, ignoring\n");
+ kfree(buffer.pointer);
+ return -EINVAL;
+}
+
+#else
+
+static int lsm6dsx_get_acpi_mount_matrix(struct device *dev,
+ struct iio_mount_matrix *orientation)
+{
+ return -EOPNOTSUPP;
+}
+
+#endif
+
+int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
+ struct regmap *regmap)
+{
+ struct st_sensors_platform_data *pdata = dev->platform_data;
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ struct st_lsm6dsx_hw *hw;
+ const char *name = NULL;
+ int i, err;
+
+ hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
+ if (!hw)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, (void *)hw);
+
+ mutex_init(&hw->fifo_lock);
+ mutex_init(&hw->conf_lock);
+ mutex_init(&hw->page_lock);
+
+ err = st_lsm6dsx_init_regulators(dev);
+ if (err)
+ return err;
+
+ hw->buff = devm_kzalloc(dev, ST_LSM6DSX_BUFF_SIZE, GFP_KERNEL);
+ if (!hw->buff)
+ return -ENOMEM;
+
+ hw->dev = dev;
+ hw->irq = irq;
+ hw->regmap = regmap;
+
+ err = st_lsm6dsx_check_whoami(hw, hw_id, &name);
+ if (err < 0)
+ return err;
+
+ for (i = 0; i < ST_LSM6DSX_ID_EXT0; i++) {
+ hw->iio_devs[i] = st_lsm6dsx_alloc_iiodev(hw, i, name);
+ if (!hw->iio_devs[i])
+ return -ENOMEM;
+ }
+
+ err = st_lsm6dsx_init_device(hw);
+ if (err < 0)
+ return err;
+
+ hub_settings = &hw->settings->shub_settings;
+ if (hub_settings->master_en.addr &&
+ (!dev_fwnode(dev) ||
+ !device_property_read_bool(dev, "st,disable-sensor-hub"))) {
+ err = st_lsm6dsx_shub_probe(hw, name);
+ if (err < 0)
+ return err;
+ }
+
+ if (hw->irq > 0) {
+ err = st_lsm6dsx_irq_setup(hw);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_fifo_setup(hw);
+ if (err < 0)
+ return err;
+ }
+
+ if (!hw->irq || !hw->settings->fifo_ops.read_fifo) {
+ /*
+ * Rely on sw triggers (e.g. hr-timers) if irq pin is not
+ * connected of if the device does not support HW FIFO
+ */
+ err = st_lsm6dsx_sw_buffers_setup(hw);
+ if (err)
+ return err;
+ }
+
+ err = lsm6dsx_get_acpi_mount_matrix(hw->dev, &hw->orientation);
+ if (err) {
+ err = iio_read_mount_matrix(hw->dev, &hw->orientation);
+ if (err)
+ return err;
+ }
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ err = devm_iio_device_register(hw->dev, hw->iio_devs[i]);
+ if (err)
+ return err;
+ }
+
+ if ((dev_fwnode(dev) && device_property_read_bool(dev, "wakeup-source")) ||
+ (pdata && pdata->wakeup_source))
+ device_init_wakeup(dev, true);
+
+ return 0;
+}
+EXPORT_SYMBOL_NS(st_lsm6dsx_probe, IIO_LSM6DSX);
+
+static int st_lsm6dsx_suspend(struct device *dev)
+{
+ struct st_lsm6dsx_hw *hw = dev_get_drvdata(dev);
+ struct st_lsm6dsx_sensor *sensor;
+ int i, err = 0;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ sensor = iio_priv(hw->iio_devs[i]);
+ if (!(hw->enable_mask & BIT(sensor->id)))
+ continue;
+
+ if (device_may_wakeup(dev) &&
+ sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event) {
+ /* Enable wake from IRQ */
+ enable_irq_wake(hw->irq);
+ continue;
+ }
+
+ err = st_lsm6dsx_device_set_enable(sensor, false);
+ if (err < 0)
+ return err;
+
+ hw->suspend_mask |= BIT(sensor->id);
+ }
+
+ if (hw->fifo_mask)
+ err = st_lsm6dsx_flush_fifo(hw);
+
+ return err;
+}
+
+static int st_lsm6dsx_resume(struct device *dev)
+{
+ struct st_lsm6dsx_hw *hw = dev_get_drvdata(dev);
+ struct st_lsm6dsx_sensor *sensor;
+ int i, err = 0;
+
+ for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ sensor = iio_priv(hw->iio_devs[i]);
+ if (device_may_wakeup(dev) &&
+ sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event)
+ disable_irq_wake(hw->irq);
+
+ if (!(hw->suspend_mask & BIT(sensor->id)))
+ continue;
+
+ err = st_lsm6dsx_device_set_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ hw->suspend_mask &= ~BIT(sensor->id);
+ }
+
+ if (hw->fifo_mask)
+ err = st_lsm6dsx_resume_fifo(hw);
+
+ return err;
+}
+
+EXPORT_NS_SIMPLE_DEV_PM_OPS(st_lsm6dsx_pm_ops, st_lsm6dsx_suspend,
+ st_lsm6dsx_resume, IIO_LSM6DSX);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c
new file mode 100644
index 0000000000..911444ec57
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics st_lsm6dsx i2c driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_lsm6dsx.h"
+
+static const struct regmap_config st_lsm6dsx_i2c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int st_lsm6dsx_i2c_probe(struct i2c_client *client)
+{
+ int hw_id;
+ struct regmap *regmap;
+
+ hw_id = (kernel_ulong_t)device_get_match_data(&client->dev);
+ if (!hw_id)
+ hw_id = i2c_client_get_device_id(client)->driver_data;
+ if (!hw_id)
+ return -EINVAL;
+
+ regmap = devm_regmap_init_i2c(client, &st_lsm6dsx_i2c_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Failed to register i2c regmap %ld\n", PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_lsm6dsx_probe(&client->dev, client->irq, hw_id, regmap);
+}
+
+static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
+ {
+ .compatible = "st,lsm6ds3",
+ .data = (void *)ST_LSM6DS3_ID,
+ },
+ {
+ .compatible = "st,lsm6ds3h",
+ .data = (void *)ST_LSM6DS3H_ID,
+ },
+ {
+ .compatible = "st,lsm6dsl",
+ .data = (void *)ST_LSM6DSL_ID,
+ },
+ {
+ .compatible = "st,lsm6dsm",
+ .data = (void *)ST_LSM6DSM_ID,
+ },
+ {
+ .compatible = "st,ism330dlc",
+ .data = (void *)ST_ISM330DLC_ID,
+ },
+ {
+ .compatible = "st,lsm6dso",
+ .data = (void *)ST_LSM6DSO_ID,
+ },
+ {
+ .compatible = "st,asm330lhh",
+ .data = (void *)ST_ASM330LHH_ID,
+ },
+ {
+ .compatible = "st,lsm6dsox",
+ .data = (void *)ST_LSM6DSOX_ID,
+ },
+ {
+ .compatible = "st,lsm6dsr",
+ .data = (void *)ST_LSM6DSR_ID,
+ },
+ {
+ .compatible = "st,lsm6ds3tr-c",
+ .data = (void *)ST_LSM6DS3TRC_ID,
+ },
+ {
+ .compatible = "st,ism330dhcx",
+ .data = (void *)ST_ISM330DHCX_ID,
+ },
+ {
+ .compatible = "st,lsm9ds1-imu",
+ .data = (void *)ST_LSM9DS1_ID,
+ },
+ {
+ .compatible = "st,lsm6ds0",
+ .data = (void *)ST_LSM6DS0_ID,
+ },
+ {
+ .compatible = "st,lsm6dsrx",
+ .data = (void *)ST_LSM6DSRX_ID,
+ },
+ {
+ .compatible = "st,lsm6dst",
+ .data = (void *)ST_LSM6DST_ID,
+ },
+ {
+ .compatible = "st,lsm6dsop",
+ .data = (void *)ST_LSM6DSOP_ID,
+ },
+ {
+ .compatible = "st,asm330lhhx",
+ .data = (void *)ST_ASM330LHHX_ID,
+ },
+ {
+ .compatible = "st,lsm6dstx",
+ .data = (void *)ST_LSM6DSTX_ID,
+ },
+ {
+ .compatible = "st,lsm6dsv",
+ .data = (void *)ST_LSM6DSV_ID,
+ },
+ {
+ .compatible = "st,lsm6dsv16x",
+ .data = (void *)ST_LSM6DSV16X_ID,
+ },
+ {
+ .compatible = "st,lsm6dso16is",
+ .data = (void *)ST_LSM6DSO16IS_ID,
+ },
+ {
+ .compatible = "st,ism330is",
+ .data = (void *)ST_ISM330IS_ID,
+ },
+ {
+ .compatible = "st,asm330lhb",
+ .data = (void *)ST_ASM330LHB_ID,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
+
+static const struct acpi_device_id st_lsm6dsx_i2c_acpi_match[] = {
+ { "SMO8B30", ST_LSM6DS3TRC_ID, },
+ {}
+};
+MODULE_DEVICE_TABLE(acpi, st_lsm6dsx_i2c_acpi_match);
+
+static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
+ { ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+ { ST_LSM6DS3H_DEV_NAME, ST_LSM6DS3H_ID },
+ { ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
+ { ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
+ { ST_ISM330DLC_DEV_NAME, ST_ISM330DLC_ID },
+ { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
+ { ST_ASM330LHH_DEV_NAME, ST_ASM330LHH_ID },
+ { ST_LSM6DSOX_DEV_NAME, ST_LSM6DSOX_ID },
+ { ST_LSM6DSR_DEV_NAME, ST_LSM6DSR_ID },
+ { ST_LSM6DS3TRC_DEV_NAME, ST_LSM6DS3TRC_ID },
+ { ST_ISM330DHCX_DEV_NAME, ST_ISM330DHCX_ID },
+ { ST_LSM9DS1_DEV_NAME, ST_LSM9DS1_ID },
+ { ST_LSM6DS0_DEV_NAME, ST_LSM6DS0_ID },
+ { ST_LSM6DSRX_DEV_NAME, ST_LSM6DSRX_ID },
+ { ST_LSM6DST_DEV_NAME, ST_LSM6DST_ID },
+ { ST_LSM6DSOP_DEV_NAME, ST_LSM6DSOP_ID },
+ { ST_ASM330LHHX_DEV_NAME, ST_ASM330LHHX_ID },
+ { ST_LSM6DSTX_DEV_NAME, ST_LSM6DSTX_ID },
+ { ST_LSM6DSV_DEV_NAME, ST_LSM6DSV_ID },
+ { ST_LSM6DSV16X_DEV_NAME, ST_LSM6DSV16X_ID },
+ { ST_LSM6DSO16IS_DEV_NAME, ST_LSM6DSO16IS_ID },
+ { ST_ISM330IS_DEV_NAME, ST_ISM330IS_ID },
+ { ST_ASM330LHB_DEV_NAME, ST_ASM330LHB_ID },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);
+
+static struct i2c_driver st_lsm6dsx_driver = {
+ .driver = {
+ .name = "st_lsm6dsx_i2c",
+ .pm = pm_sleep_ptr(&st_lsm6dsx_pm_ops),
+ .of_match_table = st_lsm6dsx_i2c_of_match,
+ .acpi_match_table = st_lsm6dsx_i2c_acpi_match,
+ },
+ .probe = st_lsm6dsx_i2c_probe,
+ .id_table = st_lsm6dsx_i2c_id_table,
+};
+module_i2c_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i2c driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_LSM6DSX);
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
new file mode 100644
index 0000000000..3b0c8b19c4
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ *
+ * Author: Vitor Soares <vitor.soares@synopsys.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/i3c/device.h>
+#include <linux/i3c/master.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_lsm6dsx.h"
+
+static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
+ I3C_DEVICE(0x0104, 0x006C, (void *)ST_LSM6DSO_ID),
+ I3C_DEVICE(0x0104, 0x006B, (void *)ST_LSM6DSR_ID),
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
+
+static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
+{
+ struct regmap_config st_lsm6dsx_i3c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ };
+ const struct i3c_device_id *id = i3c_device_match_id(i3cdev,
+ st_lsm6dsx_i3c_ids);
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&i3cdev->dev, "Failed to register i3c regmap %ld\n", PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_lsm6dsx_probe(&i3cdev->dev, 0, (uintptr_t)id->data, regmap);
+}
+
+static struct i3c_driver st_lsm6dsx_driver = {
+ .driver = {
+ .name = "st_lsm6dsx_i3c",
+ .pm = pm_sleep_ptr(&st_lsm6dsx_pm_ops),
+ },
+ .probe = st_lsm6dsx_i3c_probe,
+ .id_table = st_lsm6dsx_i3c_ids,
+};
+module_i3c_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_LSM6DSX);
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
new file mode 100644
index 0000000000..c1b444520d
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
@@ -0,0 +1,917 @@
+/*
+ * STMicroelectronics st_lsm6dsx i2c controller driver
+ *
+ * i2c controller embedded in lsm6dx series can connect up to four
+ * slave devices using accelerometer sensor as trigger for i2c
+ * read/write operations. Current implementation relies on SLV0 channel
+ * for slave configuration and SLV{1,2,3} to read data and push them into
+ * the hw FIFO
+ *
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/bitfield.h>
+
+#include "st_lsm6dsx.h"
+
+#define ST_LSM6DSX_SLV_ADDR(n, base) ((base) + (n) * 3)
+#define ST_LSM6DSX_SLV_SUB_ADDR(n, base) ((base) + 1 + (n) * 3)
+#define ST_LSM6DSX_SLV_CONFIG(n, base) ((base) + 2 + (n) * 3)
+
+#define ST_LS6DSX_READ_OP_MASK GENMASK(2, 0)
+
+static const struct st_lsm6dsx_ext_dev_settings st_lsm6dsx_ext_dev_table[] = {
+ /* LIS2MDL */
+ {
+ .i2c_addr = { 0x1e },
+ .wai = {
+ .addr = 0x4f,
+ .val = 0x40,
+ },
+ .id = ST_LSM6DSX_ID_MAGN,
+ .odr_table = {
+ .reg = {
+ .addr = 0x60,
+ .mask = GENMASK(3, 2),
+ },
+ .odr_avl[0] = { 10000, 0x0 },
+ .odr_avl[1] = { 20000, 0x1 },
+ .odr_avl[2] = { 50000, 0x2 },
+ .odr_avl[3] = { 100000, 0x3 },
+ .odr_len = 4,
+ },
+ .fs_table = {
+ .fs_avl[0] = {
+ .gain = 1500,
+ .val = 0x0,
+ }, /* 1500 uG/LSB */
+ .fs_len = 1,
+ },
+ .temp_comp = {
+ .addr = 0x60,
+ .mask = BIT(7),
+ },
+ .pwr_table = {
+ .reg = {
+ .addr = 0x60,
+ .mask = GENMASK(1, 0),
+ },
+ .off_val = 0x2,
+ .on_val = 0x0,
+ },
+ .off_canc = {
+ .addr = 0x61,
+ .mask = BIT(1),
+ },
+ .bdu = {
+ .addr = 0x62,
+ .mask = BIT(4),
+ },
+ .out = {
+ .addr = 0x68,
+ .len = 6,
+ },
+ },
+ /* LIS3MDL */
+ {
+ .i2c_addr = { 0x1e },
+ .wai = {
+ .addr = 0x0f,
+ .val = 0x3d,
+ },
+ .id = ST_LSM6DSX_ID_MAGN,
+ .odr_table = {
+ .reg = {
+ .addr = 0x20,
+ .mask = GENMASK(4, 2),
+ },
+ .odr_avl[0] = { 1000, 0x0 },
+ .odr_avl[1] = { 2000, 0x1 },
+ .odr_avl[2] = { 3000, 0x2 },
+ .odr_avl[3] = { 5000, 0x3 },
+ .odr_avl[4] = { 10000, 0x4 },
+ .odr_avl[5] = { 20000, 0x5 },
+ .odr_avl[6] = { 40000, 0x6 },
+ .odr_avl[7] = { 80000, 0x7 },
+ .odr_len = 8,
+ },
+ .fs_table = {
+ .reg = {
+ .addr = 0x21,
+ .mask = GENMASK(6, 5),
+ },
+ .fs_avl[0] = {
+ .gain = 146,
+ .val = 0x00,
+ }, /* 4000 uG/LSB */
+ .fs_avl[1] = {
+ .gain = 292,
+ .val = 0x01,
+ }, /* 8000 uG/LSB */
+ .fs_avl[2] = {
+ .gain = 438,
+ .val = 0x02,
+ }, /* 12000 uG/LSB */
+ .fs_avl[3] = {
+ .gain = 584,
+ .val = 0x03,
+ }, /* 16000 uG/LSB */
+ .fs_len = 4,
+ },
+ .pwr_table = {
+ .reg = {
+ .addr = 0x22,
+ .mask = GENMASK(1, 0),
+ },
+ .off_val = 0x2,
+ .on_val = 0x0,
+ },
+ .bdu = {
+ .addr = 0x24,
+ .mask = BIT(6),
+ },
+ .out = {
+ .addr = 0x28,
+ .len = 6,
+ },
+ },
+};
+
+static void st_lsm6dsx_shub_wait_complete(struct st_lsm6dsx_hw *hw)
+{
+ struct st_lsm6dsx_sensor *sensor;
+ u32 odr, timeout;
+
+ sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ odr = (hw->enable_mask & BIT(ST_LSM6DSX_ID_ACC)) ? sensor->odr : 12500;
+ /* set 10ms as minimum timeout for i2c slave configuration */
+ timeout = max_t(u32, 2000000U / odr + 1, 10);
+ msleep(timeout);
+}
+
+/*
+ * st_lsm6dsx_shub_read_output - read i2c controller register
+ *
+ * Read st_lsm6dsx i2c controller register
+ */
+int st_lsm6dsx_shub_read_output(struct st_lsm6dsx_hw *hw, u8 *data, int len)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ int err;
+
+ mutex_lock(&hw->page_lock);
+
+ hub_settings = &hw->settings->shub_settings;
+ if (hub_settings->shub_out.sec_page) {
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ goto out;
+ }
+
+ err = regmap_bulk_read(hw->regmap, hub_settings->shub_out.addr,
+ data, len);
+
+ if (hub_settings->shub_out.sec_page)
+ st_lsm6dsx_set_page(hw, false);
+out:
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+/*
+ * st_lsm6dsx_shub_write_reg - write i2c controller register
+ *
+ * Write st_lsm6dsx i2c controller register
+ */
+static int st_lsm6dsx_shub_write_reg(struct st_lsm6dsx_hw *hw, u8 addr,
+ u8 *data, int len)
+{
+ int err;
+
+ mutex_lock(&hw->page_lock);
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ goto out;
+
+ err = regmap_bulk_write(hw->regmap, addr, data, len);
+
+ st_lsm6dsx_set_page(hw, false);
+out:
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+static int
+st_lsm6dsx_shub_write_reg_with_mask(struct st_lsm6dsx_hw *hw, u8 addr,
+ u8 mask, u8 val)
+{
+ int err;
+
+ mutex_lock(&hw->page_lock);
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ goto out;
+
+ err = regmap_update_bits(hw->regmap, addr, mask, val);
+
+ st_lsm6dsx_set_page(hw, false);
+out:
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+static int st_lsm6dsx_shub_master_enable(struct st_lsm6dsx_sensor *sensor,
+ bool enable)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ unsigned int data;
+ int err;
+
+ /* enable acc sensor as trigger */
+ err = st_lsm6dsx_sensor_set_enable(sensor, enable);
+ if (err < 0)
+ return err;
+
+ mutex_lock(&hw->page_lock);
+
+ hub_settings = &hw->settings->shub_settings;
+ if (hub_settings->master_en.sec_page) {
+ err = st_lsm6dsx_set_page(hw, true);
+ if (err < 0)
+ goto out;
+ }
+
+ data = ST_LSM6DSX_SHIFT_VAL(enable, hub_settings->master_en.mask);
+ err = regmap_update_bits(hw->regmap, hub_settings->master_en.addr,
+ hub_settings->master_en.mask, data);
+
+ if (hub_settings->master_en.sec_page)
+ st_lsm6dsx_set_page(hw, false);
+out:
+ mutex_unlock(&hw->page_lock);
+
+ return err;
+}
+
+/*
+ * st_lsm6dsx_shub_read - read data from slave device register
+ *
+ * Read data from slave device register. SLV0 is used for
+ * one-shot read operation
+ */
+static int
+st_lsm6dsx_shub_read(struct st_lsm6dsx_sensor *sensor, u8 addr,
+ u8 *data, int len)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ u8 config[3], slv_addr, slv_config = 0;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ const struct st_lsm6dsx_reg *aux_sens;
+ int err;
+
+ hub_settings = &hw->settings->shub_settings;
+ slv_addr = ST_LSM6DSX_SLV_ADDR(0, hub_settings->slv0_addr);
+ aux_sens = &hw->settings->shub_settings.aux_sens;
+ /* do not overwrite aux_sens */
+ if (slv_addr + 2 == aux_sens->addr)
+ slv_config = ST_LSM6DSX_SHIFT_VAL(3, aux_sens->mask);
+
+ config[0] = (sensor->ext_info.addr << 1) | 1;
+ config[1] = addr;
+ config[2] = (len & ST_LS6DSX_READ_OP_MASK) | slv_config;
+
+ err = st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_shub_master_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ st_lsm6dsx_shub_wait_complete(hw);
+
+ err = st_lsm6dsx_shub_read_output(hw, data,
+ len & ST_LS6DSX_READ_OP_MASK);
+ if (err < 0)
+ return err;
+
+ st_lsm6dsx_shub_master_enable(sensor, false);
+
+ config[0] = hub_settings->pause;
+ config[1] = 0;
+ config[2] = slv_config;
+ return st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+}
+
+/*
+ * st_lsm6dsx_shub_write - write data to slave device register
+ *
+ * Write data from slave device register. SLV0 is used for
+ * one-shot write operation
+ */
+static int
+st_lsm6dsx_shub_write(struct st_lsm6dsx_sensor *sensor, u8 addr,
+ u8 *data, int len)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ u8 config[2], slv_addr;
+ int err, i;
+
+ hub_settings = &hw->settings->shub_settings;
+ if (hub_settings->wr_once.addr) {
+ unsigned int data;
+
+ data = ST_LSM6DSX_SHIFT_VAL(1, hub_settings->wr_once.mask);
+ err = st_lsm6dsx_shub_write_reg_with_mask(hw,
+ hub_settings->wr_once.addr,
+ hub_settings->wr_once.mask,
+ data);
+ if (err < 0)
+ return err;
+ }
+
+ slv_addr = ST_LSM6DSX_SLV_ADDR(0, hub_settings->slv0_addr);
+ config[0] = sensor->ext_info.addr << 1;
+ for (i = 0 ; i < len; i++) {
+ config[1] = addr + i;
+
+ err = st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_shub_write_reg(hw, hub_settings->dw_slv0_addr,
+ &data[i], 1);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_shub_master_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ st_lsm6dsx_shub_wait_complete(hw);
+
+ st_lsm6dsx_shub_master_enable(sensor, false);
+ }
+
+ config[0] = hub_settings->pause;
+ config[1] = 0;
+ return st_lsm6dsx_shub_write_reg(hw, slv_addr, config, sizeof(config));
+}
+
+static int
+st_lsm6dsx_shub_write_with_mask(struct st_lsm6dsx_sensor *sensor,
+ u8 addr, u8 mask, u8 val)
+{
+ int err;
+ u8 data;
+
+ err = st_lsm6dsx_shub_read(sensor, addr, &data, sizeof(data));
+ if (err < 0)
+ return err;
+
+ data = ((data & ~mask) | (val << __ffs(mask) & mask));
+
+ return st_lsm6dsx_shub_write(sensor, addr, &data, sizeof(data));
+}
+
+static int
+st_lsm6dsx_shub_get_odr_val(struct st_lsm6dsx_sensor *sensor,
+ u32 odr, u16 *val)
+{
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ int i;
+
+ settings = sensor->ext_info.settings;
+ for (i = 0; i < settings->odr_table.odr_len; i++) {
+ if (settings->odr_table.odr_avl[i].milli_hz == odr)
+ break;
+ }
+
+ if (i == settings->odr_table.odr_len)
+ return -EINVAL;
+
+ *val = settings->odr_table.odr_avl[i].val;
+ return 0;
+}
+
+static int
+st_lsm6dsx_shub_set_odr(struct st_lsm6dsx_sensor *sensor, u32 odr)
+{
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ u16 val;
+ int err;
+
+ err = st_lsm6dsx_shub_get_odr_val(sensor, odr, &val);
+ if (err < 0)
+ return err;
+
+ settings = sensor->ext_info.settings;
+ return st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->odr_table.reg.addr,
+ settings->odr_table.reg.mask,
+ val);
+}
+
+/* use SLV{1,2,3} for FIFO read operations */
+static int
+st_lsm6dsx_shub_config_channels(struct st_lsm6dsx_sensor *sensor,
+ bool enable)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ u8 config[9] = {}, enable_mask, slv_addr;
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ struct st_lsm6dsx_sensor *cur_sensor;
+ int i, j = 0;
+
+ hub_settings = &hw->settings->shub_settings;
+ if (enable)
+ enable_mask = hw->enable_mask | BIT(sensor->id);
+ else
+ enable_mask = hw->enable_mask & ~BIT(sensor->id);
+
+ for (i = ST_LSM6DSX_ID_EXT0; i <= ST_LSM6DSX_ID_EXT2; i++) {
+ if (!hw->iio_devs[i])
+ continue;
+
+ cur_sensor = iio_priv(hw->iio_devs[i]);
+ if (!(enable_mask & BIT(cur_sensor->id)))
+ continue;
+
+ settings = cur_sensor->ext_info.settings;
+ config[j] = (sensor->ext_info.addr << 1) | 1;
+ config[j + 1] = settings->out.addr;
+ config[j + 2] = (settings->out.len & ST_LS6DSX_READ_OP_MASK) |
+ hub_settings->batch_en;
+ j += 3;
+ }
+
+ slv_addr = ST_LSM6DSX_SLV_ADDR(1, hub_settings->slv0_addr);
+ return st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+}
+
+int st_lsm6dsx_shub_set_enable(struct st_lsm6dsx_sensor *sensor, bool enable)
+{
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ int err;
+
+ err = st_lsm6dsx_shub_config_channels(sensor, enable);
+ if (err < 0)
+ return err;
+
+ settings = sensor->ext_info.settings;
+ if (enable) {
+ err = st_lsm6dsx_shub_set_odr(sensor,
+ sensor->ext_info.slv_odr);
+ if (err < 0)
+ return err;
+ } else {
+ err = st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->odr_table.reg.addr,
+ settings->odr_table.reg.mask, 0);
+ if (err < 0)
+ return err;
+ }
+
+ if (settings->pwr_table.reg.addr) {
+ u8 val;
+
+ val = enable ? settings->pwr_table.on_val
+ : settings->pwr_table.off_val;
+ err = st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->pwr_table.reg.addr,
+ settings->pwr_table.reg.mask, val);
+ if (err < 0)
+ return err;
+ }
+
+ return st_lsm6dsx_shub_master_enable(sensor, enable);
+}
+
+static int
+st_lsm6dsx_shub_read_oneshot(struct st_lsm6dsx_sensor *sensor,
+ struct iio_chan_spec const *ch,
+ int *val)
+{
+ int err, delay, len;
+ u8 data[4];
+
+ err = st_lsm6dsx_shub_set_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ delay = 1000000000 / sensor->ext_info.slv_odr;
+ usleep_range(delay, 2 * delay);
+
+ len = min_t(int, sizeof(data), ch->scan_type.realbits >> 3);
+ err = st_lsm6dsx_shub_read(sensor, ch->address, data, len);
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_shub_set_enable(sensor, false);
+ if (err < 0)
+ return err;
+
+ switch (len) {
+ case 2:
+ *val = (s16)le16_to_cpu(*((__le16 *)data));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int
+st_lsm6dsx_shub_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *ch,
+ int *val, int *val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(iio_dev);
+ if (ret)
+ break;
+
+ ret = st_lsm6dsx_shub_read_oneshot(sensor, ch, val);
+ iio_device_release_direct_mode(iio_dev);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = sensor->ext_info.slv_odr / 1000;
+ *val2 = (sensor->ext_info.slv_odr % 1000) * 1000;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = sensor->gain;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int
+st_lsm6dsx_shub_set_full_scale(struct st_lsm6dsx_sensor *sensor,
+ u32 gain)
+{
+ const struct st_lsm6dsx_fs_table_entry *fs_table;
+ int i, err;
+
+ fs_table = &sensor->ext_info.settings->fs_table;
+ if (!fs_table->reg.addr)
+ return -ENOTSUPP;
+
+ for (i = 0; i < fs_table->fs_len; i++) {
+ if (fs_table->fs_avl[i].gain == gain)
+ break;
+ }
+
+ if (i == fs_table->fs_len)
+ return -EINVAL;
+
+ err = st_lsm6dsx_shub_write_with_mask(sensor, fs_table->reg.addr,
+ fs_table->reg.mask,
+ fs_table->fs_avl[i].val);
+ if (err < 0)
+ return err;
+
+ sensor->gain = gain;
+
+ return 0;
+}
+
+static int
+st_lsm6dsx_shub_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ int err;
+
+ err = iio_device_claim_direct_mode(iio_dev);
+ if (err)
+ return err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ: {
+ u16 data;
+
+ val = val * 1000 + val2 / 1000;
+ err = st_lsm6dsx_shub_get_odr_val(sensor, val, &data);
+ if (!err) {
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+ struct st_lsm6dsx_sensor *ref_sensor;
+ u8 odr_val;
+ int odr;
+
+ ref_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ odr = st_lsm6dsx_check_odr(ref_sensor, val, &odr_val);
+ if (odr < 0) {
+ err = odr;
+ goto release;
+ }
+
+ sensor->ext_info.slv_odr = val;
+ sensor->odr = odr;
+ }
+ break;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ err = st_lsm6dsx_shub_set_full_scale(sensor, val2);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+release:
+ iio_device_release_direct_mode(iio_dev);
+
+ return err;
+}
+
+static ssize_t
+st_lsm6dsx_shub_sampling_freq_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_get_drvdata(dev));
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ int i, len = 0;
+
+ settings = sensor->ext_info.settings;
+ for (i = 0; i < settings->odr_table.odr_len; i++) {
+ u32 val = settings->odr_table.odr_avl[i].milli_hz;
+
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%03d ",
+ val / 1000, val % 1000);
+ }
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t st_lsm6dsx_shub_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct st_lsm6dsx_sensor *sensor = iio_priv(dev_get_drvdata(dev));
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ int i, len = 0;
+
+ settings = sensor->ext_info.settings;
+ for (i = 0; i < settings->fs_table.fs_len; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
+ settings->fs_table.fs_avl[i].gain);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(st_lsm6dsx_shub_sampling_freq_avail);
+static IIO_DEVICE_ATTR(in_scale_available, 0444,
+ st_lsm6dsx_shub_scale_avail, NULL, 0);
+static struct attribute *st_lsm6dsx_shub_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_lsm6dsx_shub_attribute_group = {
+ .attrs = st_lsm6dsx_shub_attributes,
+};
+
+static const struct iio_info st_lsm6dsx_shub_info = {
+ .attrs = &st_lsm6dsx_shub_attribute_group,
+ .read_raw = st_lsm6dsx_shub_read_raw,
+ .write_raw = st_lsm6dsx_shub_write_raw,
+ .hwfifo_set_watermark = st_lsm6dsx_set_watermark,
+};
+
+static struct iio_dev *
+st_lsm6dsx_shub_alloc_iiodev(struct st_lsm6dsx_hw *hw,
+ enum st_lsm6dsx_sensor_id id,
+ const struct st_lsm6dsx_ext_dev_settings *info,
+ u8 i2c_addr, const char *name)
+{
+ enum st_lsm6dsx_sensor_id ref_id = ST_LSM6DSX_ID_ACC;
+ struct iio_chan_spec *ext_channels;
+ struct st_lsm6dsx_sensor *sensor;
+ struct iio_dev *iio_dev;
+
+ iio_dev = devm_iio_device_alloc(hw->dev, sizeof(*sensor));
+ if (!iio_dev)
+ return NULL;
+
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->info = &st_lsm6dsx_shub_info;
+
+ sensor = iio_priv(iio_dev);
+ sensor->id = id;
+ sensor->hw = hw;
+ sensor->odr = hw->settings->odr_table[ref_id].odr_avl[0].milli_hz;
+ sensor->ext_info.slv_odr = info->odr_table.odr_avl[0].milli_hz;
+ sensor->gain = info->fs_table.fs_avl[0].gain;
+ sensor->ext_info.settings = info;
+ sensor->ext_info.addr = i2c_addr;
+ sensor->watermark = 1;
+
+ switch (info->id) {
+ case ST_LSM6DSX_ID_MAGN: {
+ const struct iio_chan_spec magn_channels[] = {
+ ST_LSM6DSX_CHANNEL(IIO_MAGN, info->out.addr,
+ IIO_MOD_X, 0),
+ ST_LSM6DSX_CHANNEL(IIO_MAGN, info->out.addr + 2,
+ IIO_MOD_Y, 1),
+ ST_LSM6DSX_CHANNEL(IIO_MAGN, info->out.addr + 4,
+ IIO_MOD_Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+ };
+
+ ext_channels = devm_kzalloc(hw->dev, sizeof(magn_channels),
+ GFP_KERNEL);
+ if (!ext_channels)
+ return NULL;
+
+ memcpy(ext_channels, magn_channels, sizeof(magn_channels));
+ iio_dev->available_scan_masks = st_lsm6dsx_available_scan_masks;
+ iio_dev->channels = ext_channels;
+ iio_dev->num_channels = ARRAY_SIZE(magn_channels);
+
+ scnprintf(sensor->name, sizeof(sensor->name), "%s_magn",
+ name);
+ break;
+ }
+ default:
+ return NULL;
+ }
+ iio_dev->name = sensor->name;
+
+ return iio_dev;
+}
+
+static int st_lsm6dsx_shub_init_device(struct st_lsm6dsx_sensor *sensor)
+{
+ const struct st_lsm6dsx_ext_dev_settings *settings;
+ int err;
+
+ settings = sensor->ext_info.settings;
+ if (settings->bdu.addr) {
+ err = st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->bdu.addr,
+ settings->bdu.mask, 1);
+ if (err < 0)
+ return err;
+ }
+
+ if (settings->temp_comp.addr) {
+ err = st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->temp_comp.addr,
+ settings->temp_comp.mask, 1);
+ if (err < 0)
+ return err;
+ }
+
+ if (settings->off_canc.addr) {
+ err = st_lsm6dsx_shub_write_with_mask(sensor,
+ settings->off_canc.addr,
+ settings->off_canc.mask, 1);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int
+st_lsm6dsx_shub_check_wai(struct st_lsm6dsx_hw *hw, u8 *i2c_addr,
+ const struct st_lsm6dsx_ext_dev_settings *settings)
+{
+ const struct st_lsm6dsx_shub_settings *hub_settings;
+ u8 config[3], data, slv_addr, slv_config = 0;
+ const struct st_lsm6dsx_reg *aux_sens;
+ struct st_lsm6dsx_sensor *sensor;
+ bool found = false;
+ int i, err;
+
+ sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+ hub_settings = &hw->settings->shub_settings;
+ aux_sens = &hw->settings->shub_settings.aux_sens;
+ slv_addr = ST_LSM6DSX_SLV_ADDR(0, hub_settings->slv0_addr);
+ /* do not overwrite aux_sens */
+ if (slv_addr + 2 == aux_sens->addr)
+ slv_config = ST_LSM6DSX_SHIFT_VAL(3, aux_sens->mask);
+
+ for (i = 0; i < ARRAY_SIZE(settings->i2c_addr); i++) {
+ if (!settings->i2c_addr[i])
+ continue;
+
+ /* read wai slave register */
+ config[0] = (settings->i2c_addr[i] << 1) | 0x1;
+ config[1] = settings->wai.addr;
+ config[2] = 0x1 | slv_config;
+
+ err = st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+ if (err < 0)
+ return err;
+
+ err = st_lsm6dsx_shub_master_enable(sensor, true);
+ if (err < 0)
+ return err;
+
+ st_lsm6dsx_shub_wait_complete(hw);
+
+ err = st_lsm6dsx_shub_read_output(hw, &data, sizeof(data));
+
+ st_lsm6dsx_shub_master_enable(sensor, false);
+
+ if (err < 0)
+ return err;
+
+ if (data != settings->wai.val)
+ continue;
+
+ *i2c_addr = settings->i2c_addr[i];
+ found = true;
+ break;
+ }
+
+ /* reset SLV0 channel */
+ config[0] = hub_settings->pause;
+ config[1] = 0;
+ config[2] = slv_config;
+ err = st_lsm6dsx_shub_write_reg(hw, slv_addr, config,
+ sizeof(config));
+ if (err < 0)
+ return err;
+
+ return found ? 0 : -ENODEV;
+}
+
+int st_lsm6dsx_shub_probe(struct st_lsm6dsx_hw *hw, const char *name)
+{
+ enum st_lsm6dsx_sensor_id id = ST_LSM6DSX_ID_EXT0;
+ struct st_lsm6dsx_sensor *sensor;
+ int err, i, num_ext_dev = 0;
+ u8 i2c_addr = 0;
+
+ for (i = 0; i < ARRAY_SIZE(st_lsm6dsx_ext_dev_table); i++) {
+ err = st_lsm6dsx_shub_check_wai(hw, &i2c_addr,
+ &st_lsm6dsx_ext_dev_table[i]);
+ if (err == -ENODEV)
+ continue;
+ else if (err < 0)
+ return err;
+
+ hw->iio_devs[id] = st_lsm6dsx_shub_alloc_iiodev(hw, id,
+ &st_lsm6dsx_ext_dev_table[i],
+ i2c_addr, name);
+ if (!hw->iio_devs[id])
+ return -ENOMEM;
+
+ sensor = iio_priv(hw->iio_devs[id]);
+ err = st_lsm6dsx_shub_init_device(sensor);
+ if (err < 0)
+ return err;
+
+ if (++num_ext_dev >= hw->settings->shub_settings.num_ext_dev)
+ break;
+ id++;
+ }
+
+ return 0;
+}
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c
new file mode 100644
index 0000000000..f56c170c41
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics st_lsm6dsx spi driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_lsm6dsx.h"
+
+static const struct regmap_config st_lsm6dsx_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int st_lsm6dsx_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ int hw_id = id->driver_data;
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &st_lsm6dsx_spi_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Failed to register spi regmap %ld\n", PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_lsm6dsx_probe(&spi->dev, spi->irq, hw_id, regmap);
+}
+
+static const struct of_device_id st_lsm6dsx_spi_of_match[] = {
+ {
+ .compatible = "st,lsm6ds3",
+ .data = (void *)ST_LSM6DS3_ID,
+ },
+ {
+ .compatible = "st,lsm6ds3h",
+ .data = (void *)ST_LSM6DS3H_ID,
+ },
+ {
+ .compatible = "st,lsm6dsl",
+ .data = (void *)ST_LSM6DSL_ID,
+ },
+ {
+ .compatible = "st,lsm6dsm",
+ .data = (void *)ST_LSM6DSM_ID,
+ },
+ {
+ .compatible = "st,ism330dlc",
+ .data = (void *)ST_ISM330DLC_ID,
+ },
+ {
+ .compatible = "st,lsm6dso",
+ .data = (void *)ST_LSM6DSO_ID,
+ },
+ {
+ .compatible = "st,asm330lhh",
+ .data = (void *)ST_ASM330LHH_ID,
+ },
+ {
+ .compatible = "st,lsm6dsox",
+ .data = (void *)ST_LSM6DSOX_ID,
+ },
+ {
+ .compatible = "st,lsm6dsr",
+ .data = (void *)ST_LSM6DSR_ID,
+ },
+ {
+ .compatible = "st,lsm6ds3tr-c",
+ .data = (void *)ST_LSM6DS3TRC_ID,
+ },
+ {
+ .compatible = "st,ism330dhcx",
+ .data = (void *)ST_ISM330DHCX_ID,
+ },
+ {
+ .compatible = "st,lsm9ds1-imu",
+ .data = (void *)ST_LSM9DS1_ID,
+ },
+ {
+ .compatible = "st,lsm6ds0",
+ .data = (void *)ST_LSM6DS0_ID,
+ },
+ {
+ .compatible = "st,lsm6dsrx",
+ .data = (void *)ST_LSM6DSRX_ID,
+ },
+ {
+ .compatible = "st,lsm6dst",
+ .data = (void *)ST_LSM6DST_ID,
+ },
+ {
+ .compatible = "st,lsm6dsop",
+ .data = (void *)ST_LSM6DSOP_ID,
+ },
+ {
+ .compatible = "st,asm330lhhx",
+ .data = (void *)ST_ASM330LHHX_ID,
+ },
+ {
+ .compatible = "st,lsm6dstx",
+ .data = (void *)ST_LSM6DSTX_ID,
+ },
+ {
+ .compatible = "st,lsm6dsv",
+ .data = (void *)ST_LSM6DSV_ID,
+ },
+ {
+ .compatible = "st,lsm6dsv16x",
+ .data = (void *)ST_LSM6DSV16X_ID,
+ },
+ {
+ .compatible = "st,lsm6dso16is",
+ .data = (void *)ST_LSM6DSO16IS_ID,
+ },
+ {
+ .compatible = "st,ism330is",
+ .data = (void *)ST_ISM330IS_ID,
+ },
+ {
+ .compatible = "st,asm330lhb",
+ .data = (void *)ST_ASM330LHB_ID,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_lsm6dsx_spi_of_match);
+
+static const struct spi_device_id st_lsm6dsx_spi_id_table[] = {
+ { ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
+ { ST_LSM6DS3H_DEV_NAME, ST_LSM6DS3H_ID },
+ { ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
+ { ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
+ { ST_ISM330DLC_DEV_NAME, ST_ISM330DLC_ID },
+ { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
+ { ST_ASM330LHH_DEV_NAME, ST_ASM330LHH_ID },
+ { ST_LSM6DSOX_DEV_NAME, ST_LSM6DSOX_ID },
+ { ST_LSM6DSR_DEV_NAME, ST_LSM6DSR_ID },
+ { ST_LSM6DS3TRC_DEV_NAME, ST_LSM6DS3TRC_ID },
+ { ST_ISM330DHCX_DEV_NAME, ST_ISM330DHCX_ID },
+ { ST_LSM9DS1_DEV_NAME, ST_LSM9DS1_ID },
+ { ST_LSM6DS0_DEV_NAME, ST_LSM6DS0_ID },
+ { ST_LSM6DSRX_DEV_NAME, ST_LSM6DSRX_ID },
+ { ST_LSM6DST_DEV_NAME, ST_LSM6DST_ID },
+ { ST_LSM6DSOP_DEV_NAME, ST_LSM6DSOP_ID },
+ { ST_ASM330LHHX_DEV_NAME, ST_ASM330LHHX_ID },
+ { ST_LSM6DSTX_DEV_NAME, ST_LSM6DSTX_ID },
+ { ST_LSM6DSV_DEV_NAME, ST_LSM6DSV_ID },
+ { ST_LSM6DSV16X_DEV_NAME, ST_LSM6DSV16X_ID },
+ { ST_LSM6DSO16IS_DEV_NAME, ST_LSM6DSO16IS_ID },
+ { ST_ISM330IS_DEV_NAME, ST_ISM330IS_ID },
+ { ST_ASM330LHB_DEV_NAME, ST_ASM330LHB_ID },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_lsm6dsx_spi_id_table);
+
+static struct spi_driver st_lsm6dsx_driver = {
+ .driver = {
+ .name = "st_lsm6dsx_spi",
+ .pm = pm_sleep_ptr(&st_lsm6dsx_pm_ops),
+ .of_match_table = st_lsm6dsx_spi_of_match,
+ },
+ .probe = st_lsm6dsx_spi_probe,
+ .id_table = st_lsm6dsx_spi_id_table,
+};
+module_spi_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx spi driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_LSM6DSX);
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-13 11:06:10 +0000