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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/iio/light/vcnl4000.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/iio/light/vcnl4000.c')
-rw-r--r--drivers/iio/light/vcnl4000.c1166
1 files changed, 1166 insertions, 0 deletions
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
new file mode 100644
index 000000000..f6c83ecaa
--- /dev/null
+++ b/drivers/iio/light/vcnl4000.c
@@ -0,0 +1,1166 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
+ * light and proximity sensor
+ *
+ * Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
+ * Copyright 2019 Pursim SPC
+ * Copyright 2020 Mathieu Othacehe <m.othacehe@gmail.com>
+ *
+ * IIO driver for:
+ * VCNL4000/10/20 (7-bit I2C slave address 0x13)
+ * VCNL4040 (7-bit I2C slave address 0x60)
+ * VCNL4200 (7-bit I2C slave address 0x51)
+ *
+ * TODO:
+ * allow to adjust IR current
+ * interrupts (VCNL4040, VCNL4200)
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define VCNL4000_DRV_NAME "vcnl4000"
+#define VCNL4000_PROD_ID 0x01
+#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
+#define VCNL4040_PROD_ID 0x86
+#define VCNL4200_PROD_ID 0x58
+
+#define VCNL4000_COMMAND 0x80 /* Command register */
+#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
+#define VCNL4010_PROX_RATE 0x82 /* Proximity rate */
+#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
+#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
+#define VCNL4010_ALS_PARAM 0x84 /* ALS rate */
+#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
+#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
+#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
+#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
+#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
+#define VCNL4010_INT_CTRL 0x89 /* Interrupt control */
+#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
+#define VCNL4010_LOW_THR_HI 0x8a /* Low threshold, MSB */
+#define VCNL4010_LOW_THR_LO 0x8b /* Low threshold, LSB */
+#define VCNL4010_HIGH_THR_HI 0x8c /* High threshold, MSB */
+#define VCNL4010_HIGH_THR_LO 0x8d /* High threshold, LSB */
+#define VCNL4010_ISR 0x8e /* Interrupt status */
+
+#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
+#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
+#define VCNL4200_PS_DATA 0x08 /* Proximity data */
+#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
+#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
+
+#define VCNL4040_DEV_ID 0x0c /* Device ID and version */
+
+/* Bit masks for COMMAND register */
+#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
+#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
+#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
+#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
+#define VCNL4000_ALS_EN BIT(2) /* start ALS measurement */
+#define VCNL4000_PROX_EN BIT(1) /* start proximity measurement */
+#define VCNL4000_SELF_TIMED_EN BIT(0) /* start self-timed measurement */
+
+/* Bit masks for interrupt registers. */
+#define VCNL4010_INT_THR_SEL BIT(0) /* Select threshold interrupt source */
+#define VCNL4010_INT_THR_EN BIT(1) /* Threshold interrupt type */
+#define VCNL4010_INT_ALS_EN BIT(2) /* Enable on ALS data ready */
+#define VCNL4010_INT_PROX_EN BIT(3) /* Enable on proximity data ready */
+
+#define VCNL4010_INT_THR_HIGH 0 /* High threshold exceeded */
+#define VCNL4010_INT_THR_LOW 1 /* Low threshold exceeded */
+#define VCNL4010_INT_ALS 2 /* ALS data ready */
+#define VCNL4010_INT_PROXIMITY 3 /* Proximity data ready */
+
+#define VCNL4010_INT_THR \
+ (BIT(VCNL4010_INT_THR_LOW) | BIT(VCNL4010_INT_THR_HIGH))
+#define VCNL4010_INT_DRDY \
+ (BIT(VCNL4010_INT_PROXIMITY) | BIT(VCNL4010_INT_ALS))
+
+static const int vcnl4010_prox_sampling_frequency[][2] = {
+ {1, 950000},
+ {3, 906250},
+ {7, 812500},
+ {16, 625000},
+ {31, 250000},
+ {62, 500000},
+ {125, 0},
+ {250, 0},
+};
+
+#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
+
+enum vcnl4000_device_ids {
+ VCNL4000,
+ VCNL4010,
+ VCNL4040,
+ VCNL4200,
+};
+
+struct vcnl4200_channel {
+ u8 reg;
+ ktime_t last_measurement;
+ ktime_t sampling_rate;
+ struct mutex lock;
+};
+
+struct vcnl4000_data {
+ struct i2c_client *client;
+ enum vcnl4000_device_ids id;
+ int rev;
+ int al_scale;
+ const struct vcnl4000_chip_spec *chip_spec;
+ struct mutex vcnl4000_lock;
+ struct vcnl4200_channel vcnl4200_al;
+ struct vcnl4200_channel vcnl4200_ps;
+ uint32_t near_level;
+};
+
+struct vcnl4000_chip_spec {
+ const char *prod;
+ struct iio_chan_spec const *channels;
+ const int num_channels;
+ const struct iio_info *info;
+ bool irq_support;
+ int (*init)(struct vcnl4000_data *data);
+ int (*measure_light)(struct vcnl4000_data *data, int *val);
+ int (*measure_proximity)(struct vcnl4000_data *data, int *val);
+ int (*set_power_state)(struct vcnl4000_data *data, bool on);
+};
+
+static const struct i2c_device_id vcnl4000_id[] = {
+ { "vcnl4000", VCNL4000 },
+ { "vcnl4010", VCNL4010 },
+ { "vcnl4020", VCNL4010 },
+ { "vcnl4040", VCNL4040 },
+ { "vcnl4200", VCNL4200 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
+
+static int vcnl4000_set_power_state(struct vcnl4000_data *data, bool on)
+{
+ /* no suspend op */
+ return 0;
+}
+
+static int vcnl4000_init(struct vcnl4000_data *data)
+{
+ int ret, prod_id;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
+ if (ret < 0)
+ return ret;
+
+ prod_id = ret >> 4;
+ switch (prod_id) {
+ case VCNL4000_PROD_ID:
+ if (data->id != VCNL4000)
+ dev_warn(&data->client->dev,
+ "wrong device id, use vcnl4000");
+ break;
+ case VCNL4010_PROD_ID:
+ if (data->id != VCNL4010)
+ dev_warn(&data->client->dev,
+ "wrong device id, use vcnl4010/4020");
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ data->rev = ret & 0xf;
+ data->al_scale = 250000;
+ mutex_init(&data->vcnl4000_lock);
+
+ return data->chip_spec->set_power_state(data, true);
+};
+
+static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on)
+{
+ u16 val = on ? 0 /* power on */ : 1 /* shut down */;
+ int ret;
+
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val);
+ if (ret < 0)
+ return ret;
+
+ if (on) {
+ /* Wait at least one integration cycle before fetching data */
+ data->vcnl4200_al.last_measurement = ktime_get();
+ data->vcnl4200_ps.last_measurement = ktime_get();
+ }
+
+ return 0;
+}
+
+static int vcnl4200_init(struct vcnl4000_data *data)
+{
+ int ret, id;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
+ if (ret < 0)
+ return ret;
+
+ id = ret & 0xff;
+
+ if (id != VCNL4200_PROD_ID) {
+ ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
+ if (ret < 0)
+ return ret;
+
+ id = ret & 0xff;
+
+ if (id != VCNL4040_PROD_ID)
+ return -ENODEV;
+ }
+
+ dev_dbg(&data->client->dev, "device id 0x%x", id);
+
+ data->rev = (ret >> 8) & 0xf;
+
+ data->vcnl4200_al.reg = VCNL4200_AL_DATA;
+ data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
+ switch (id) {
+ case VCNL4200_PROD_ID:
+ /* Default wait time is 50ms, add 20% tolerance. */
+ data->vcnl4200_al.sampling_rate = ktime_set(0, 60000 * 1000);
+ /* Default wait time is 4.8ms, add 20% tolerance. */
+ data->vcnl4200_ps.sampling_rate = ktime_set(0, 5760 * 1000);
+ data->al_scale = 24000;
+ break;
+ case VCNL4040_PROD_ID:
+ /* Default wait time is 80ms, add 20% tolerance. */
+ data->vcnl4200_al.sampling_rate = ktime_set(0, 96000 * 1000);
+ /* Default wait time is 5ms, add 20% tolerance. */
+ data->vcnl4200_ps.sampling_rate = ktime_set(0, 6000 * 1000);
+ data->al_scale = 120000;
+ break;
+ }
+ mutex_init(&data->vcnl4200_al.lock);
+ mutex_init(&data->vcnl4200_ps.lock);
+
+ ret = data->chip_spec->set_power_state(data, true);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+};
+
+static int vcnl4000_read_data(struct vcnl4000_data *data, u8 data_reg, int *val)
+{
+ s32 ret;
+
+ ret = i2c_smbus_read_word_swapped(data->client, data_reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+ return 0;
+}
+
+static int vcnl4000_write_data(struct vcnl4000_data *data, u8 data_reg, int val)
+{
+ if (val > U16_MAX)
+ return -ERANGE;
+
+ return i2c_smbus_write_word_swapped(data->client, data_reg, val);
+}
+
+
+static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
+ u8 rdy_mask, u8 data_reg, int *val)
+{
+ int tries = 20;
+ int ret;
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
+ req_mask);
+ if (ret < 0)
+ goto fail;
+
+ /* wait for data to become ready */
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
+ if (ret < 0)
+ goto fail;
+ if (ret & rdy_mask)
+ break;
+ msleep(20); /* measurement takes up to 100 ms */
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev,
+ "vcnl4000_measure() failed, data not ready\n");
+ ret = -EIO;
+ goto fail;
+ }
+
+ ret = vcnl4000_read_data(data, data_reg, val);
+ if (ret < 0)
+ goto fail;
+
+ mutex_unlock(&data->vcnl4000_lock);
+
+ return 0;
+
+fail:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
+static int vcnl4200_measure(struct vcnl4000_data *data,
+ struct vcnl4200_channel *chan, int *val)
+{
+ int ret;
+ s64 delta;
+ ktime_t next_measurement;
+
+ mutex_lock(&chan->lock);
+
+ next_measurement = ktime_add(chan->last_measurement,
+ chan->sampling_rate);
+ delta = ktime_us_delta(next_measurement, ktime_get());
+ if (delta > 0)
+ usleep_range(delta, delta + 500);
+ chan->last_measurement = ktime_get();
+
+ mutex_unlock(&chan->lock);
+
+ ret = i2c_smbus_read_word_data(data->client, chan->reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return 0;
+}
+
+static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4000_measure(data,
+ VCNL4000_AL_OD, VCNL4000_AL_RDY,
+ VCNL4000_AL_RESULT_HI, val);
+}
+
+static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4200_measure(data, &data->vcnl4200_al, val);
+}
+
+static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4000_measure(data,
+ VCNL4000_PS_OD, VCNL4000_PS_RDY,
+ VCNL4000_PS_RESULT_HI, val);
+}
+
+static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4200_measure(data, &data->vcnl4200_ps, val);
+}
+
+static int vcnl4010_read_proxy_samp_freq(struct vcnl4000_data *data, int *val,
+ int *val2)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4010_PROX_RATE);
+ if (ret < 0)
+ return ret;
+
+ if (ret >= ARRAY_SIZE(vcnl4010_prox_sampling_frequency))
+ return -EINVAL;
+
+ *val = vcnl4010_prox_sampling_frequency[ret][0];
+ *val2 = vcnl4010_prox_sampling_frequency[ret][1];
+
+ return 0;
+}
+
+static bool vcnl4010_is_in_periodic_mode(struct vcnl4000_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
+ if (ret < 0)
+ return false;
+
+ return !!(ret & VCNL4000_SELF_TIMED_EN);
+}
+
+static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+
+ if (on) {
+ ret = pm_runtime_resume_and_get(dev);
+ } else {
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ }
+
+ return ret;
+}
+
+static int vcnl4000_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = vcnl4000_set_pm_runtime_state(data, true);
+ if (ret < 0)
+ return ret;
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = data->chip_spec->measure_light(data, val);
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_PROXIMITY:
+ ret = data->chip_spec->measure_proximity(data, val);
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ vcnl4000_set_pm_runtime_state(data, false);
+ return ret;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ *val = 0;
+ *val2 = data->al_scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4010_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_SCALE:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ /* Protect against event capture. */
+ if (vcnl4010_is_in_periodic_mode(data)) {
+ ret = -EBUSY;
+ } else {
+ ret = vcnl4000_read_raw(indio_dev, chan, val, val2,
+ mask);
+ }
+
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ ret = vcnl4010_read_proxy_samp_freq(data, val, val2);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4010_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *vals = (int *)vcnl4010_prox_sampling_frequency;
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ *length = 2 * ARRAY_SIZE(vcnl4010_prox_sampling_frequency);
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4010_write_proxy_samp_freq(struct vcnl4000_data *data, int val,
+ int val2)
+{
+ unsigned int i;
+ int index = -1;
+
+ for (i = 0; i < ARRAY_SIZE(vcnl4010_prox_sampling_frequency); i++) {
+ if (val == vcnl4010_prox_sampling_frequency[i][0] &&
+ val2 == vcnl4010_prox_sampling_frequency[i][1]) {
+ index = i;
+ break;
+ }
+ }
+
+ if (index < 0)
+ return -EINVAL;
+
+ return i2c_smbus_write_byte_data(data->client, VCNL4010_PROX_RATE,
+ index);
+}
+
+static int vcnl4010_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ /* Protect against event capture. */
+ if (vcnl4010_is_in_periodic_mode(data)) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ ret = vcnl4010_write_proxy_samp_freq(data, val, val2);
+ goto end;
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
+
+end:
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+}
+
+static int vcnl4010_read_event(struct iio_dev *indio_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)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ ret = vcnl4000_read_data(data, VCNL4010_HIGH_THR_HI,
+ val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ ret = vcnl4000_read_data(data, VCNL4010_LOW_THR_HI,
+ val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4010_write_event(struct iio_dev *indio_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)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ ret = vcnl4000_write_data(data, VCNL4010_HIGH_THR_HI,
+ val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ ret = vcnl4000_write_data(data, VCNL4010_LOW_THR_HI,
+ val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static bool vcnl4010_is_thr_enabled(struct vcnl4000_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4010_INT_CTRL);
+ if (ret < 0)
+ return false;
+
+ return !!(ret & VCNL4010_INT_THR_EN);
+}
+
+static int vcnl4010_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return vcnl4010_is_thr_enabled(data);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int vcnl4010_config_threshold(struct iio_dev *indio_dev, bool state)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ int ret;
+ int icr;
+ int command;
+
+ if (state) {
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ /* Enable periodic measurement of proximity data. */
+ command = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN;
+
+ /*
+ * Enable interrupts on threshold, for proximity data by
+ * default.
+ */
+ icr = VCNL4010_INT_THR_EN;
+ } else {
+ if (!vcnl4010_is_thr_enabled(data))
+ return 0;
+
+ command = 0;
+ icr = 0;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
+ command);
+ if (ret < 0)
+ goto end;
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, icr);
+
+end:
+ if (state)
+ iio_device_release_direct_mode(indio_dev);
+
+ return ret;
+}
+
+static int vcnl4010_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return vcnl4010_config_threshold(indio_dev, state);
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t vcnl4000_read_near_level(struct iio_dev *indio_dev,
+ uintptr_t priv,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ return sprintf(buf, "%u\n", data->near_level);
+}
+
+static const struct iio_chan_spec_ext_info vcnl4000_ext_info[] = {
+ {
+ .name = "nearlevel",
+ .shared = IIO_SEPARATE,
+ .read = vcnl4000_read_near_level,
+ },
+ { /* sentinel */ }
+};
+
+static const struct iio_event_spec vcnl4000_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ }
+};
+
+static const struct iio_chan_spec vcnl4000_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .ext_info = vcnl4000_ext_info,
+ }
+};
+
+static const struct iio_chan_spec vcnl4010_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .scan_index = -1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_PROXIMITY,
+ .scan_index = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .event_spec = vcnl4000_event_spec,
+ .num_event_specs = ARRAY_SIZE(vcnl4000_event_spec),
+ .ext_info = vcnl4000_ext_info,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_CPU,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static const struct iio_info vcnl4000_info = {
+ .read_raw = vcnl4000_read_raw,
+};
+
+static const struct iio_info vcnl4010_info = {
+ .read_raw = vcnl4010_read_raw,
+ .read_avail = vcnl4010_read_avail,
+ .write_raw = vcnl4010_write_raw,
+ .read_event_value = vcnl4010_read_event,
+ .write_event_value = vcnl4010_write_event,
+ .read_event_config = vcnl4010_read_event_config,
+ .write_event_config = vcnl4010_write_event_config,
+};
+
+static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
+ [VCNL4000] = {
+ .prod = "VCNL4000",
+ .init = vcnl4000_init,
+ .measure_light = vcnl4000_measure_light,
+ .measure_proximity = vcnl4000_measure_proximity,
+ .set_power_state = vcnl4000_set_power_state,
+ .channels = vcnl4000_channels,
+ .num_channels = ARRAY_SIZE(vcnl4000_channels),
+ .info = &vcnl4000_info,
+ .irq_support = false,
+ },
+ [VCNL4010] = {
+ .prod = "VCNL4010/4020",
+ .init = vcnl4000_init,
+ .measure_light = vcnl4000_measure_light,
+ .measure_proximity = vcnl4000_measure_proximity,
+ .set_power_state = vcnl4000_set_power_state,
+ .channels = vcnl4010_channels,
+ .num_channels = ARRAY_SIZE(vcnl4010_channels),
+ .info = &vcnl4010_info,
+ .irq_support = true,
+ },
+ [VCNL4040] = {
+ .prod = "VCNL4040",
+ .init = vcnl4200_init,
+ .measure_light = vcnl4200_measure_light,
+ .measure_proximity = vcnl4200_measure_proximity,
+ .set_power_state = vcnl4200_set_power_state,
+ .channels = vcnl4000_channels,
+ .num_channels = ARRAY_SIZE(vcnl4000_channels),
+ .info = &vcnl4000_info,
+ .irq_support = false,
+ },
+ [VCNL4200] = {
+ .prod = "VCNL4200",
+ .init = vcnl4200_init,
+ .measure_light = vcnl4200_measure_light,
+ .measure_proximity = vcnl4200_measure_proximity,
+ .set_power_state = vcnl4200_set_power_state,
+ .channels = vcnl4000_channels,
+ .num_channels = ARRAY_SIZE(vcnl4000_channels),
+ .info = &vcnl4000_info,
+ .irq_support = false,
+ },
+};
+
+static irqreturn_t vcnl4010_irq_thread(int irq, void *p)
+{
+ struct iio_dev *indio_dev = p;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ unsigned long isr;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4010_ISR);
+ if (ret < 0)
+ goto end;
+
+ isr = ret;
+
+ if (isr & VCNL4010_INT_THR) {
+ if (test_bit(VCNL4010_INT_THR_LOW, &isr)) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(
+ IIO_PROXIMITY,
+ 1,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns(indio_dev));
+ }
+
+ if (test_bit(VCNL4010_INT_THR_HIGH, &isr)) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(
+ IIO_PROXIMITY,
+ 1,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns(indio_dev));
+ }
+
+ i2c_smbus_write_byte_data(data->client, VCNL4010_ISR,
+ isr & VCNL4010_INT_THR);
+ }
+
+ if (isr & VCNL4010_INT_DRDY && iio_buffer_enabled(indio_dev))
+ iio_trigger_poll_chained(indio_dev->trig);
+
+end:
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t vcnl4010_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ const unsigned long *active_scan_mask = indio_dev->active_scan_mask;
+ u16 buffer[8] __aligned(8) = {0}; /* 1x16-bit + naturally aligned ts */
+ bool data_read = false;
+ unsigned long isr;
+ int val = 0;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4010_ISR);
+ if (ret < 0)
+ goto end;
+
+ isr = ret;
+
+ if (test_bit(0, active_scan_mask)) {
+ if (test_bit(VCNL4010_INT_PROXIMITY, &isr)) {
+ ret = vcnl4000_read_data(data,
+ VCNL4000_PS_RESULT_HI,
+ &val);
+ if (ret < 0)
+ goto end;
+
+ buffer[0] = val;
+ data_read = true;
+ }
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4010_ISR,
+ isr & VCNL4010_INT_DRDY);
+ if (ret < 0)
+ goto end;
+
+ if (!data_read)
+ goto end;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ iio_get_time_ns(indio_dev));
+
+end:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+static int vcnl4010_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ int ret;
+ int cmd;
+
+ /* Do not enable the buffer if we are already capturing events. */
+ if (vcnl4010_is_in_periodic_mode(data))
+ return -EBUSY;
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL,
+ VCNL4010_INT_PROX_EN);
+ if (ret < 0)
+ return ret;
+
+ cmd = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN;
+ return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, cmd);
+}
+
+static int vcnl4010_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, 0);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, 0);
+}
+
+static const struct iio_buffer_setup_ops vcnl4010_buffer_ops = {
+ .postenable = &vcnl4010_buffer_postenable,
+ .predisable = &vcnl4010_buffer_predisable,
+};
+
+static const struct iio_trigger_ops vcnl4010_trigger_ops = {
+ .validate_device = iio_trigger_validate_own_device,
+};
+
+static int vcnl4010_probe_trigger(struct iio_dev *indio_dev)
+{
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+ struct iio_trigger *trigger;
+
+ trigger = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
+ indio_dev->name,
+ iio_device_id(indio_dev));
+ if (!trigger)
+ return -ENOMEM;
+
+ trigger->ops = &vcnl4010_trigger_ops;
+ iio_trigger_set_drvdata(trigger, indio_dev);
+
+ return devm_iio_trigger_register(&client->dev, trigger);
+}
+
+static int vcnl4000_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct vcnl4000_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->id = id->driver_data;
+ data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];
+
+ ret = data->chip_spec->init(data);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
+ data->chip_spec->prod, data->rev);
+
+ if (device_property_read_u32(&client->dev, "proximity-near-level",
+ &data->near_level))
+ data->near_level = 0;
+
+ indio_dev->info = data->chip_spec->info;
+ indio_dev->channels = data->chip_spec->channels;
+ indio_dev->num_channels = data->chip_spec->num_channels;
+ indio_dev->name = VCNL4000_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ if (client->irq && data->chip_spec->irq_support) {
+ ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev,
+ NULL,
+ vcnl4010_trigger_handler,
+ &vcnl4010_buffer_ops);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "unable to setup iio triggered buffer\n");
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, vcnl4010_irq_thread,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "vcnl4010_irq",
+ indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "irq request failed\n");
+ return ret;
+ }
+
+ ret = vcnl4010_probe_trigger(indio_dev);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto fail_poweroff;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto fail_poweroff;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, VCNL4000_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+fail_poweroff:
+ data->chip_spec->set_power_state(data, false);
+ return ret;
+}
+
+static const struct of_device_id vcnl_4000_of_match[] = {
+ {
+ .compatible = "vishay,vcnl4000",
+ .data = (void *)VCNL4000,
+ },
+ {
+ .compatible = "vishay,vcnl4010",
+ .data = (void *)VCNL4010,
+ },
+ {
+ .compatible = "vishay,vcnl4020",
+ .data = (void *)VCNL4010,
+ },
+ {
+ .compatible = "vishay,vcnl4040",
+ .data = (void *)VCNL4040,
+ },
+ {
+ .compatible = "vishay,vcnl4200",
+ .data = (void *)VCNL4200,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);
+
+static void vcnl4000_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+ int ret;
+
+ pm_runtime_dont_use_autosuspend(&client->dev);
+ pm_runtime_disable(&client->dev);
+ iio_device_unregister(indio_dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ ret = data->chip_spec->set_power_state(data, false);
+ if (ret)
+ dev_warn(&client->dev, "Failed to power down (%pe)\n",
+ ERR_PTR(ret));
+}
+
+static int vcnl4000_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ return data->chip_spec->set_power_state(data, false);
+}
+
+static int vcnl4000_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ return data->chip_spec->set_power_state(data, true);
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(vcnl4000_pm_ops, vcnl4000_runtime_suspend,
+ vcnl4000_runtime_resume, NULL);
+
+static struct i2c_driver vcnl4000_driver = {
+ .driver = {
+ .name = VCNL4000_DRV_NAME,
+ .pm = pm_ptr(&vcnl4000_pm_ops),
+ .of_match_table = vcnl_4000_of_match,
+ },
+ .probe = vcnl4000_probe,
+ .id_table = vcnl4000_id,
+ .remove = vcnl4000_remove,
+};
+
+module_i2c_driver(vcnl4000_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_AUTHOR("Mathieu Othacehe <m.othacehe@gmail.com>");
+MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL");