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-rw-r--r--drivers/iio/pressure/st_pressure_core.c798
1 files changed, 798 insertions, 0 deletions
diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
new file mode 100644
index 000000000..80176e308
--- /dev/null
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -0,0 +1,798 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics pressures driver
+ *
+ * Copyright 2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <asm/unaligned.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_pressure.h"
+
+/*
+ * About determining pressure scaling factors
+ * ------------------------------------------
+ *
+ * Datasheets specify typical pressure sensitivity so that pressure is computed
+ * according to the following equation :
+ * pressure[mBar] = raw / sensitivity
+ * where :
+ * raw the 24 bits long raw sampled pressure
+ * sensitivity a scaling factor specified by the datasheet in LSB/mBar
+ *
+ * IIO ABI expects pressure to be expressed as kPascal, hence pressure should be
+ * computed according to :
+ * pressure[kPascal] = pressure[mBar] / 10
+ * = raw / (sensitivity * 10) (1)
+ *
+ * Finally, st_press_read_raw() returns pressure scaling factor as an
+ * IIO_VAL_INT_PLUS_NANO with a zero integral part and "gain" as decimal part.
+ * Therefore, from (1), "gain" becomes :
+ * gain = 10^9 / (sensitivity * 10)
+ * = 10^8 / sensitivity
+ *
+ * About determining temperature scaling factors and offsets
+ * ---------------------------------------------------------
+ *
+ * Datasheets specify typical temperature sensitivity and offset so that
+ * temperature is computed according to the following equation :
+ * temp[Celsius] = offset[Celsius] + (raw / sensitivity)
+ * where :
+ * raw the 16 bits long raw sampled temperature
+ * offset a constant specified by the datasheet in degree Celsius
+ * (sometimes zero)
+ * sensitivity a scaling factor specified by the datasheet in LSB/Celsius
+ *
+ * IIO ABI expects temperature to be expressed as milli degree Celsius such as
+ * user space should compute temperature according to :
+ * temp[mCelsius] = temp[Celsius] * 10^3
+ * = (offset[Celsius] + (raw / sensitivity)) * 10^3
+ * = ((offset[Celsius] * sensitivity) + raw) *
+ * (10^3 / sensitivity) (2)
+ *
+ * IIO ABI expects user space to apply offset and scaling factors to raw samples
+ * according to :
+ * temp[mCelsius] = (OFFSET + raw) * SCALE
+ * where :
+ * OFFSET an arbitrary constant exposed by device
+ * SCALE an arbitrary scaling factor exposed by device
+ *
+ * Matching OFFSET and SCALE with members of (2) gives :
+ * OFFSET = offset[Celsius] * sensitivity (3)
+ * SCALE = 10^3 / sensitivity (4)
+ *
+ * st_press_read_raw() returns temperature scaling factor as an
+ * IIO_VAL_FRACTIONAL with a 10^3 numerator and "gain2" as denominator.
+ * Therefore, from (3), "gain2" becomes :
+ * gain2 = sensitivity
+ *
+ * When declared within channel, i.e. for a non zero specified offset,
+ * st_press_read_raw() will return the latter as an IIO_VAL_FRACTIONAL such as :
+ * numerator = OFFSET * 10^3
+ * denominator = 10^3
+ * giving from (4):
+ * numerator = offset[Celsius] * 10^3 * sensitivity
+ * = offset[mCelsius] * gain2
+ */
+
+#define MCELSIUS_PER_CELSIUS 1000
+
+/* Default pressure sensitivity */
+#define ST_PRESS_LSB_PER_MBAR 4096UL
+#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
+ ST_PRESS_LSB_PER_MBAR)
+
+/* Default temperature sensitivity */
+#define ST_PRESS_LSB_PER_CELSIUS 480UL
+#define ST_PRESS_MILLI_CELSIUS_OFFSET 42500UL
+
+/* FULLSCALE */
+#define ST_PRESS_FS_AVL_1100MB 1100
+#define ST_PRESS_FS_AVL_1260MB 1260
+
+#define ST_PRESS_1_OUT_XL_ADDR 0x28
+#define ST_TEMP_1_OUT_L_ADDR 0x2b
+
+/* LPS001WP pressure resolution */
+#define ST_PRESS_LPS001WP_LSB_PER_MBAR 16UL
+/* LPS001WP temperature resolution */
+#define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64UL
+/* LPS001WP pressure gain */
+#define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \
+ (100000000UL / ST_PRESS_LPS001WP_LSB_PER_MBAR)
+/* LPS001WP pressure and temp L addresses */
+#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
+#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
+
+/* LPS25H pressure and temp L addresses */
+#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
+#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
+
+/* LPS22HB temperature sensitivity */
+#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL
+
+static const struct iio_chan_spec st_press_1_channels[] = {
+ {
+ .type = IIO_PRESSURE,
+ .address = ST_PRESS_1_OUT_XL_ADDR,
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 24,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ },
+ {
+ .type = IIO_TEMP,
+ .address = ST_TEMP_1_OUT_L_ADDR,
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OFFSET),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2)
+};
+
+static const struct iio_chan_spec st_press_lps001wp_channels[] = {
+ {
+ .type = IIO_PRESSURE,
+ .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ .type = IIO_TEMP,
+ .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2)
+};
+
+static const struct iio_chan_spec st_press_lps22hb_channels[] = {
+ {
+ .type = IIO_PRESSURE,
+ .address = ST_PRESS_1_OUT_XL_ADDR,
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 24,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ },
+ {
+ .type = IIO_TEMP,
+ .address = ST_TEMP_1_OUT_L_ADDR,
+ .scan_index = 1,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2)
+};
+
+static const struct st_sensor_settings st_press_sensors_settings[] = {
+ {
+ /*
+ * CUSTOM VALUES FOR LPS331AP SENSOR
+ * See LPS331AP datasheet:
+ * http://www2.st.com/resource/en/datasheet/lps331ap.pdf
+ */
+ .wai = 0xbb,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS331AP_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_1_channels,
+ .num_ch = ARRAY_SIZE(st_press_1_channels),
+ .odr = {
+ .addr = 0x20,
+ .mask = 0x70,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 7, .value = 0x05 },
+ { .hz = 13, .value = 0x06 },
+ { .hz = 25, .value = 0x07 },
+ },
+ },
+ .pw = {
+ .addr = 0x20,
+ .mask = 0x80,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .addr = 0x23,
+ .mask = 0x30,
+ .fs_avl = {
+ /*
+ * Pressure and temperature sensitivity values
+ * as defined in table 3 of LPS331AP datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+ .gain2 = ST_PRESS_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x20,
+ .mask = 0x04,
+ },
+ .drdy_irq = {
+ .int1 = {
+ .addr = 0x22,
+ .mask = 0x04,
+ .addr_od = 0x22,
+ .mask_od = 0x40,
+ },
+ .int2 = {
+ .addr = 0x22,
+ .mask = 0x20,
+ .addr_od = 0x22,
+ .mask_od = 0x40,
+ },
+ .addr_ihl = 0x22,
+ .mask_ihl = 0x80,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
+ },
+ .sim = {
+ .addr = 0x20,
+ .value = BIT(0),
+ },
+ .multi_read_bit = true,
+ .bootime = 2,
+ },
+ {
+ /*
+ * CUSTOM VALUES FOR LPS001WP SENSOR
+ */
+ .wai = 0xba,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS001WP_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
+ .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
+ .odr = {
+ .addr = 0x20,
+ .mask = 0x30,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 7, .value = 0x02 },
+ { .hz = 13, .value = 0x03 },
+ },
+ },
+ .pw = {
+ .addr = 0x20,
+ .mask = 0x40,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .fs_avl = {
+ /*
+ * Pressure and temperature resolution values
+ * as defined in table 3 of LPS001WP datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1100MB,
+ .gain = ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN,
+ .gain2 = ST_PRESS_LPS001WP_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x20,
+ .mask = 0x04,
+ },
+ .sim = {
+ .addr = 0x20,
+ .value = BIT(0),
+ },
+ .multi_read_bit = true,
+ .bootime = 2,
+ },
+ {
+ /*
+ * CUSTOM VALUES FOR LPS25H SENSOR
+ * See LPS25H datasheet:
+ * http://www2.st.com/resource/en/datasheet/lps25h.pdf
+ */
+ .wai = 0xbd,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS25H_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_1_channels,
+ .num_ch = ARRAY_SIZE(st_press_1_channels),
+ .odr = {
+ .addr = 0x20,
+ .mask = 0x70,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 7, .value = 0x02 },
+ { .hz = 13, .value = 0x03 },
+ { .hz = 25, .value = 0x04 },
+ },
+ },
+ .pw = {
+ .addr = 0x20,
+ .mask = 0x80,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .fs_avl = {
+ /*
+ * Pressure and temperature sensitivity values
+ * as defined in table 3 of LPS25H datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+ .gain2 = ST_PRESS_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x20,
+ .mask = 0x04,
+ },
+ .drdy_irq = {
+ .int1 = {
+ .addr = 0x23,
+ .mask = 0x01,
+ .addr_od = 0x22,
+ .mask_od = 0x40,
+ },
+ .addr_ihl = 0x22,
+ .mask_ihl = 0x80,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
+ },
+ .sim = {
+ .addr = 0x20,
+ .value = BIT(0),
+ },
+ .multi_read_bit = true,
+ .bootime = 2,
+ },
+ {
+ /*
+ * CUSTOM VALUES FOR LPS22HB SENSOR
+ * See LPS22HB datasheet:
+ * http://www2.st.com/resource/en/datasheet/lps22hb.pdf
+ */
+ .wai = 0xb1,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS22HB_PRESS_DEV_NAME,
+ [1] = LPS33HW_PRESS_DEV_NAME,
+ [2] = LPS35HW_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
+ .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
+ .odr = {
+ .addr = 0x10,
+ .mask = 0x70,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 10, .value = 0x02 },
+ { .hz = 25, .value = 0x03 },
+ { .hz = 50, .value = 0x04 },
+ { .hz = 75, .value = 0x05 },
+ },
+ },
+ .pw = {
+ .addr = 0x10,
+ .mask = 0x70,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .fs_avl = {
+ /*
+ * Pressure and temperature sensitivity values
+ * as defined in table 3 of LPS22HB datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+ .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x10,
+ .mask = 0x02,
+ },
+ .drdy_irq = {
+ .int1 = {
+ .addr = 0x12,
+ .mask = 0x04,
+ .addr_od = 0x12,
+ .mask_od = 0x40,
+ },
+ .addr_ihl = 0x12,
+ .mask_ihl = 0x80,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
+ },
+ .sim = {
+ .addr = 0x10,
+ .value = BIT(0),
+ },
+ .multi_read_bit = false,
+ .bootime = 2,
+ },
+ {
+ /*
+ * CUSTOM VALUES FOR LPS22HH SENSOR
+ * See LPS22HH datasheet:
+ * http://www2.st.com/resource/en/datasheet/lps22hh.pdf
+ */
+ .wai = 0xb3,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS22HH_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
+ .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
+ .odr = {
+ .addr = 0x10,
+ .mask = 0x70,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 10, .value = 0x02 },
+ { .hz = 25, .value = 0x03 },
+ { .hz = 50, .value = 0x04 },
+ { .hz = 75, .value = 0x05 },
+ { .hz = 100, .value = 0x06 },
+ { .hz = 200, .value = 0x07 },
+ },
+ },
+ .pw = {
+ .addr = 0x10,
+ .mask = 0x70,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .fs_avl = {
+ /*
+ * Pressure and temperature sensitivity values
+ * as defined in table 3 of LPS22HH datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+ .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x10,
+ .mask = BIT(1),
+ },
+ .drdy_irq = {
+ .int1 = {
+ .addr = 0x12,
+ .mask = BIT(2),
+ .addr_od = 0x11,
+ .mask_od = BIT(5),
+ },
+ .addr_ihl = 0x11,
+ .mask_ihl = BIT(6),
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
+ },
+ .sim = {
+ .addr = 0x10,
+ .value = BIT(0),
+ },
+ .multi_read_bit = false,
+ .bootime = 2,
+ },
+ {
+ /*
+ * CUSTOM VALUES FOR LPS22DF SENSOR
+ * See LPS22DF datasheet:
+ * http://www.st.com/resource/en/datasheet/lps22df.pdf
+ */
+ .wai = 0xb4,
+ .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+ .sensors_supported = {
+ [0] = LPS22DF_PRESS_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
+ .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
+ .odr = {
+ .addr = 0x10,
+ .mask = 0x78,
+ .odr_avl = {
+ { .hz = 1, .value = 0x01 },
+ { .hz = 4, .value = 0x02 },
+ { .hz = 10, .value = 0x03 },
+ { .hz = 25, .value = 0x04 },
+ { .hz = 50, .value = 0x05 },
+ { .hz = 75, .value = 0x06 },
+ { .hz = 100, .value = 0x07 },
+ { .hz = 200, .value = 0x08 },
+ },
+ },
+ .pw = {
+ .addr = 0x10,
+ .mask = 0x78,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .fs = {
+ .fs_avl = {
+ /*
+ * Pressure and temperature sensitivity values
+ * as defined in table 2 of LPS22DF datasheet.
+ */
+ [0] = {
+ .num = ST_PRESS_FS_AVL_1260MB,
+ .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+ .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
+ },
+ },
+ },
+ .bdu = {
+ .addr = 0x11,
+ .mask = BIT(3),
+ },
+ .drdy_irq = {
+ .int1 = {
+ .addr = 0x13,
+ .mask = BIT(5),
+ .addr_od = 0x12,
+ .mask_od = BIT(1),
+ },
+ .addr_ihl = 0x12,
+ .mask_ihl = BIT(3),
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
+ },
+ .sim = {
+ .addr = 0x0E,
+ .value = BIT(5),
+ },
+ .multi_read_bit = false,
+ .bootime = 2,
+ },
+};
+
+static int st_press_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *ch,
+ int val,
+ int val2,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (val2)
+ return -EINVAL;
+
+ return st_sensors_set_odr(indio_dev, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int st_press_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *ch, int *val,
+ int *val2, long mask)
+{
+ int err;
+ struct st_sensor_data *press_data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ err = st_sensors_read_info_raw(indio_dev, ch, val);
+ if (err < 0)
+ goto read_error;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (ch->type) {
+ case IIO_PRESSURE:
+ *val = 0;
+ *val2 = press_data->current_fullscale->gain;
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_TEMP:
+ *val = MCELSIUS_PER_CELSIUS;
+ *val2 = press_data->current_fullscale->gain2;
+ return IIO_VAL_FRACTIONAL;
+ default:
+ err = -EINVAL;
+ goto read_error;
+ }
+
+ case IIO_CHAN_INFO_OFFSET:
+ switch (ch->type) {
+ case IIO_TEMP:
+ *val = ST_PRESS_MILLI_CELSIUS_OFFSET *
+ press_data->current_fullscale->gain2;
+ *val2 = MCELSIUS_PER_CELSIUS;
+ break;
+ default:
+ err = -EINVAL;
+ goto read_error;
+ }
+
+ return IIO_VAL_FRACTIONAL;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = press_data->odr;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+
+read_error:
+ return err;
+}
+
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+
+static struct attribute *st_press_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_press_attribute_group = {
+ .attrs = st_press_attributes,
+};
+
+static const struct iio_info press_info = {
+ .attrs = &st_press_attribute_group,
+ .read_raw = &st_press_read_raw,
+ .write_raw = &st_press_write_raw,
+ .debugfs_reg_access = &st_sensors_debugfs_reg_access,
+};
+
+#ifdef CONFIG_IIO_TRIGGER
+static const struct iio_trigger_ops st_press_trigger_ops = {
+ .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
+ .validate_device = st_sensors_validate_device,
+};
+#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
+#else
+#define ST_PRESS_TRIGGER_OPS NULL
+#endif
+
+/*
+ * st_press_get_settings() - get sensor settings from device name
+ * @name: device name buffer reference.
+ *
+ * Return: valid reference on success, NULL otherwise.
+ */
+const struct st_sensor_settings *st_press_get_settings(const char *name)
+{
+ int index = st_sensors_get_settings_index(name,
+ st_press_sensors_settings,
+ ARRAY_SIZE(st_press_sensors_settings));
+ if (index < 0)
+ return NULL;
+
+ return &st_press_sensors_settings[index];
+}
+EXPORT_SYMBOL_NS(st_press_get_settings, IIO_ST_SENSORS);
+
+int st_press_common_probe(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *press_data = iio_priv(indio_dev);
+ struct device *parent = indio_dev->dev.parent;
+ struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
+ int err;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &press_info;
+
+ err = st_sensors_verify_id(indio_dev);
+ if (err < 0)
+ return err;
+
+ /*
+ * Skip timestamping channel while declaring available channels to
+ * common st_sensor layer. Look at st_sensors_get_buffer_element() to
+ * see how timestamps are explicitly pushed as last samples block
+ * element.
+ */
+ press_data->num_data_channels = press_data->sensor_settings->num_ch - 1;
+ indio_dev->channels = press_data->sensor_settings->ch;
+ indio_dev->num_channels = press_data->sensor_settings->num_ch;
+
+ press_data->current_fullscale = &press_data->sensor_settings->fs.fs_avl[0];
+
+ press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
+
+ /* Some devices don't support a data ready pin. */
+ if (!pdata && (press_data->sensor_settings->drdy_irq.int1.addr ||
+ press_data->sensor_settings->drdy_irq.int2.addr))
+ pdata = (struct st_sensors_platform_data *)&default_press_pdata;
+
+ err = st_sensors_init_sensor(indio_dev, pdata);
+ if (err < 0)
+ return err;
+
+ err = st_press_allocate_ring(indio_dev);
+ if (err < 0)
+ return err;
+
+ if (press_data->irq > 0) {
+ err = st_sensors_allocate_trigger(indio_dev,
+ ST_PRESS_TRIGGER_OPS);
+ if (err < 0)
+ return err;
+ }
+
+ return devm_iio_device_register(parent, indio_dev);
+}
+EXPORT_SYMBOL_NS(st_press_common_probe, IIO_ST_SENSORS);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics pressures driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_ST_SENSORS);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-24 08:33:38 +0000