From: Crt Mori <cmo@melexis.com>
The sensor can operate in lower power modes and even make measurements when
in those lower powered modes. The decision was taken that if measurement
is not requested within 2 seconds the sensor will remain in SLEEP_STEP
power mode, where measurements are triggered on request with setting the
start of measurement bit (SOB). In this mode the measurements are taking
a bit longer because we need to start it and complete it. Currently, in
continuous mode we read ready data and this mode is activated if sensor
measurement is requested within 2 seconds. The suspend timeout is
increased to 6 seconds (instead of 3 before), because that enables more
measurements in lower power mode (SLEEP_STEP), with the lowest refresh
rate (2 seconds).
Signed-off-by: Crt Mori <cmo@melexis.com>
---
drivers/iio/temperature/mlx90632.c | 379 +++++++++++++++++++++++------
1 file changed, 309 insertions(+), 70 deletions(-)
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index 549c0ab5c2be..71130d237a69 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -6,11 +6,14 @@
*
* Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
*/
+#include <linux/bitfield.h>
#include <linux/delay.h>
+#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/iopoll.h>
+#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/limits.h>
#include <linux/mod_devicetable.h>
@@ -55,6 +58,12 @@
#define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
#define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
+#define MLX90632_EE_MEDICAL_MEAS1 0x24E1 /* Medical measurement 1 16bit */
+#define MLX90632_EE_MEDICAL_MEAS2 0x24E2 /* Medical measurement 2 16bit */
+#define MLX90632_EE_EXTENDED_MEAS1 0x24F1 /* Extended measurement 1 16bit */
+#define MLX90632_EE_EXTENDED_MEAS2 0x24F2 /* Extended measurement 2 16bit */
+#define MLX90632_EE_EXTENDED_MEAS3 0x24F3 /* Extended measurement 3 16bit */
+
/* Register addresses - volatile */
#define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
@@ -62,13 +71,16 @@
#define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
#define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
#define MLX90632_CFG_MTYP_MASK GENMASK(8, 4) /* Meas select Mask */
+#define MLX90632_CFG_SOB_MASK BIT(11)
/* PowerModes statuses */
#define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
#define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
-#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
+#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step */
#define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
-#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
+#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
+
+#define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
/* Measurement types */
#define MLX90632_MTYP_MEDICAL 0
@@ -116,8 +128,9 @@
#define MLX90632_REF_12 12LL /* ResCtrlRef value of Ch 1 or Ch 2 */
#define MLX90632_REF_3 12LL /* ResCtrlRef value of Channel 3 */
#define MLX90632_MAX_MEAS_NUM 31 /* Maximum measurements in list */
-#define MLX90632_SLEEP_DELAY_MS 3000 /* Autosleep delay */
+#define MLX90632_SLEEP_DELAY_MS 6000 /* Autosleep delay */
#define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
+#define MLX90632_MEAS_MAX_TIME 2000 /* Max measurement time in ms for the lowest refresh rate */
/**
* struct mlx90632_data - private data for the MLX90632 device
@@ -130,6 +143,9 @@
* @object_ambient_temperature: Ambient temperature at object (might differ of
* the ambient temperature of sensor.
* @regulator: Regulator of the device
+ * @powerstatus: Current POWER status of the device
+ * @interaction_ts: Timestamp of the last temperature read that is used
+ * for power management in jiffies
*/
struct mlx90632_data {
struct i2c_client *client;
@@ -139,6 +155,8 @@ struct mlx90632_data {
u8 mtyp;
u32 object_ambient_temperature;
struct regulator *regulator;
+ int powerstatus;
+ unsigned long interaction_ts;
};
static const struct regmap_range mlx90632_volatile_reg_range[] = {
@@ -158,6 +176,8 @@ static const struct regmap_range mlx90632_read_reg_range[] = {
regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
+ regmap_reg_range(MLX90632_EE_MEDICAL_MEAS1, MLX90632_EE_MEDICAL_MEAS2),
+ regmap_reg_range(MLX90632_EE_EXTENDED_MEAS1, MLX90632_EE_EXTENDED_MEAS3),
regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
@@ -198,16 +218,38 @@ static const struct regmap_config mlx90632_regmap = {
static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
{
- return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
- MLX90632_CFG_PWR_MASK,
- MLX90632_PWR_STATUS_SLEEP_STEP);
+ struct mlx90632_data *data =
+ iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
+ s32 ret;
+
+ if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
+ return 0;
+
+ ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_SLEEP_STEP);
+ if (ret < 0)
+ return ret;
+
+ data->powerstatus = MLX90632_PWR_STATUS_SLEEP_STEP;
+ return ret;
}
static s32 mlx90632_pwr_continuous(struct regmap *regmap)
{
- return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
- MLX90632_CFG_PWR_MASK,
- MLX90632_PWR_STATUS_CONTINUOUS);
+ struct mlx90632_data *data =
+ iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
+ s32 ret;
+
+ if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS)
+ return 0;
+
+ ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
+ MLX90632_PWR_STATUS_CONTINUOUS);
+ if (ret < 0)
+ return ret;
+
+ data->powerstatus = MLX90632_PWR_STATUS_CONTINUOUS;
+ return ret;
}
/**
@@ -219,6 +261,63 @@ static void mlx90632_reset_delay(void)
usleep_range(150, 200);
}
+static int mlx90632_get_measurement_time(struct regmap *regmap, u16 meas)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(regmap, meas, ®);
+ if (ret < 0)
+ return ret;
+
+ return MLX90632_MEAS_MAX_TIME >> FIELD_GET(MLX90632_EE_RR, reg);
+}
+
+static int mlx90632_calculate_dataset_ready_time(struct mlx90632_data *data)
+{
+ unsigned int refresh_time;
+ int ret;
+
+ if (data->mtyp == MLX90632_MTYP_MEDICAL) {
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_MEDICAL_MEAS1);
+ if (ret < 0)
+ return ret;
+
+ refresh_time = ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_MEDICAL_MEAS2);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+ } else {
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS1);
+ if (ret < 0)
+ return ret;
+
+ refresh_time = ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS2);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+
+ ret = mlx90632_get_measurement_time(data->regmap,
+ MLX90632_EE_EXTENDED_MEAS3);
+ if (ret < 0)
+ return ret;
+
+ refresh_time += ret;
+ }
+
+ return refresh_time;
+}
+
/**
* mlx90632_perform_measurement() - Trigger and retrieve current measurement cycle
* @data: pointer to mlx90632_data object containing regmap information
@@ -249,26 +348,75 @@ static int mlx90632_perform_measurement(struct mlx90632_data *data)
return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
}
-static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
+/**
+ * mlx90632_perform_measurement_burst() - Trigger and retrieve current measurement
+ * cycle in step sleep mode
+ * @data: pointer to mlx90632_data object containing regmap information
+ *
+ * Perform a measurement and return 2 as measurement cycle position reported
+ * by sensor. This is a blocking function for amount dependent on the sensor
+ * refresh rate.
+ */
+static int mlx90632_perform_measurement_burst(struct mlx90632_data *data)
{
+ unsigned int reg_status;
int ret;
- if ((type != MLX90632_MTYP_MEDICAL) && (type != MLX90632_MTYP_EXTENDED))
- return -EINVAL;
+ ret = regmap_write_bits(data->regmap, MLX90632_REG_CONTROL,
+ MLX90632_CFG_SOB_MASK, MLX90632_CFG_SOB_MASK);
+ if (ret < 0)
+ return ret;
- ret = regmap_write(regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
+ ret = mlx90632_calculate_dataset_ready_time(data);
+ if (ret < 0)
+ return ret;
+
+ msleep(ret); /* Wait minimum time for dataset to be ready */
+
+ ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
+ reg_status,
+ (reg_status & MLX90632_STAT_BUSY) == 0,
+ 10000, 100 * 10000);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "data not ready");
+ return -ETIMEDOUT;
+ }
+
+ return 2;
+}
+
+static int mlx90632_set_meas_type(struct mlx90632_data *data, u8 type)
+{
+ int current_powerstatus;
+ int ret;
+
+ if (data->mtyp == type)
+ return 0;
+
+ current_powerstatus = data->powerstatus;
+ ret = mlx90632_pwr_continuous(data->regmap);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_write(data->regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
if (ret < 0)
return ret;
mlx90632_reset_delay();
- ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
+ ret = regmap_update_bits(data->regmap, MLX90632_REG_CONTROL,
(MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
(MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
if (ret < 0)
return ret;
- return mlx90632_pwr_continuous(regmap);
+ data->mtyp = type;
+ data->powerstatus = MLX90632_PWR_STATUS_HALT;
+
+ if (current_powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
+ return mlx90632_pwr_set_sleep_step(data->regmap);
+
+ return mlx90632_pwr_continuous(data->regmap);
}
static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
@@ -355,11 +503,30 @@ static int mlx90632_read_all_channel(struct mlx90632_data *data,
s32 ret, measurement;
mutex_lock(&data->lock);
- measurement = mlx90632_perform_measurement(data);
- if (measurement < 0) {
- ret = measurement;
+ ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
+ if (ret < 0)
+ goto read_unlock;
+
+ switch (data->powerstatus) {
+ case MLX90632_PWR_STATUS_CONTINUOUS:
+ measurement = mlx90632_perform_measurement(data);
+ if (measurement < 0) {
+ ret = measurement;
+ goto read_unlock;
+ }
+ break;
+ case MLX90632_PWR_STATUS_SLEEP_STEP:
+ measurement = mlx90632_perform_measurement_burst(data);
+ if (measurement < 0) {
+ ret = measurement;
+ goto read_unlock;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
goto read_unlock;
}
+
ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
ambient_old_raw);
if (ret < 0)
@@ -441,14 +608,20 @@ static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *o
s32 ret, meas;
mutex_lock(&data->lock);
- ret = mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_EXTENDED);
+ ret = mlx90632_set_meas_type(data, MLX90632_MTYP_EXTENDED);
if (ret < 0)
goto read_unlock;
- ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
- 50000, 800000, false, data);
- if (ret != 0)
- goto read_unlock;
+ if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS) {
+ ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
+ 50000, 800000, false, data);
+ if (ret)
+ goto read_unlock;
+ } else if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
+ ret = mlx90632_perform_measurement_burst(data);
+ if (ret < 0)
+ goto read_unlock;
+ }
ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
if (ret < 0)
@@ -457,8 +630,6 @@ static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *o
ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_old_raw);
read_unlock:
- (void) mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_MEDICAL);
-
mutex_unlock(&data->lock);
return ret;
}
@@ -743,12 +914,47 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
return ret;
}
+/**
+ * mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
+ * @data: pointer to mlx90632_data object containing interaction_ts information
+ *
+ * Switch to continuous mode when interaction is faster than MLX90632_MEAS_MAX_TIME. Update the
+ * interaction_ts for each function call with the jiffies to enable measurement between function
+ * calls. Initial value of the interaction_ts needs to be set before this function call.
+ */
+static int mlx90632_pm_interraction_wakeup(struct mlx90632_data *data)
+{
+ unsigned long now;
+ int ret;
+
+ now = jiffies;
+ if (time_in_range(now, data->interaction_ts,
+ data->interaction_ts +
+ msecs_to_jiffies(MLX90632_MEAS_MAX_TIME + 100))) {
+ if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
+ ret = mlx90632_pwr_continuous(data->regmap);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ data->interaction_ts = now;
+
+ return 0;
+}
+
static int mlx90632_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *channel, int *val,
int *val2, long mask)
{
struct mlx90632_data *data = iio_priv(indio_dev);
int ret;
+ int cr;
+
+ pm_runtime_get_sync(&data->client->dev);
+ ret = mlx90632_pm_interraction_wakeup(data);
+ if (ret < 0)
+ goto mlx90632_read_raw_pm;
switch (mask) {
case IIO_CHAN_INFO_PROCESSED:
@@ -756,16 +962,22 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
case IIO_MOD_TEMP_AMBIENT:
ret = mlx90632_calc_ambient_dsp105(data, val);
if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ goto mlx90632_read_raw_pm;
+
+ ret = IIO_VAL_INT;
+ break;
case IIO_MOD_TEMP_OBJECT:
ret = mlx90632_calc_object_dsp105(data, val);
if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ goto mlx90632_read_raw_pm;
+
+ ret = IIO_VAL_INT;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+ break;
case IIO_CHAN_INFO_CALIBEMISSIVITY:
if (data->emissivity == 1000) {
*val = 1;
@@ -774,13 +986,21 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
*val = 0;
*val2 = data->emissivity * 1000;
}
- return IIO_VAL_INT_PLUS_MICRO;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
case IIO_CHAN_INFO_CALIBAMBIENT:
*val = data->object_ambient_temperature;
- return IIO_VAL_INT;
+ ret = IIO_VAL_INT;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
+
+mlx90632_read_raw_pm:
+ pm_runtime_mark_last_busy(&data->client->dev);
+ pm_runtime_put_autosuspend(&data->client->dev);
+ return ret;
}
static int mlx90632_write_raw(struct iio_dev *indio_dev,
@@ -826,11 +1046,18 @@ static const struct iio_info mlx90632_info = {
.write_raw = mlx90632_write_raw,
};
-static int mlx90632_sleep(struct mlx90632_data *data)
+static void mlx90632_sleep(void *_data)
+{
+ struct mlx90632_data *data = _data;
+
+ mlx90632_pwr_set_sleep_step(data->regmap);
+}
+
+static int mlx90632_suspend(struct mlx90632_data *data)
{
regcache_mark_dirty(data->regmap);
- dev_dbg(&data->client->dev, "Requesting sleep");
+ dev_dbg(&data->client->dev, "Requesting suspend");
return mlx90632_pwr_set_sleep_step(data->regmap);
}
@@ -902,6 +1129,7 @@ static int mlx90632_probe(struct i2c_client *client,
mlx90632->client = client;
mlx90632->regmap = regmap;
mlx90632->mtyp = MLX90632_MTYP_MEDICAL;
+ mlx90632->powerstatus = MLX90632_PWR_STATUS_HALT;
mutex_init(&mlx90632->lock);
indio_dev->name = id->name;
@@ -933,6 +1161,13 @@ static int mlx90632_probe(struct i2c_client *client,
return ret;
}
+ ret = devm_add_action_or_reset(&client->dev, mlx90632_sleep, mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup low power cleanup action %d\n",
+ ret);
+ return ret;
+ }
+
ret = regmap_read(mlx90632->regmap, MLX90632_EE_VERSION, &read);
if (ret < 0) {
dev_err(&client->dev, "read of version failed: %d\n", ret);
@@ -961,34 +1196,17 @@ static int mlx90632_probe(struct i2c_client *client,
mlx90632->emissivity = 1000;
mlx90632->object_ambient_temperature = 25000; /* 25 degrees milliCelsius */
+ mlx90632->interaction_ts = jiffies; /* Set initial value */
- pm_runtime_disable(&client->dev);
- ret = pm_runtime_set_active(&client->dev);
- if (ret < 0) {
- mlx90632_sleep(mlx90632);
- return ret;
- }
- pm_runtime_enable(&client->dev);
+ pm_runtime_get_noresume(&client->dev);
+ pm_runtime_set_active(&client->dev);
+
+ devm_pm_runtime_enable(&client->dev);
pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_put_autosuspend(&client->dev);
- return iio_device_register(indio_dev);
-}
-
-static int mlx90632_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct mlx90632_data *data = iio_priv(indio_dev);
-
- iio_device_unregister(indio_dev);
-
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
- pm_runtime_put_noidle(&client->dev);
-
- mlx90632_sleep(data);
-
- return 0;
+ return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct i2c_device_id mlx90632_id[] = {
@@ -1003,33 +1221,54 @@ static const struct of_device_id mlx90632_of_match[] = {
};
MODULE_DEVICE_TABLE(of, mlx90632_of_match);
-static int __maybe_unused mlx90632_pm_suspend(struct device *dev)
+static int mlx90632_pm_suspend(struct device *dev)
{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct mlx90632_data *data = iio_priv(indio_dev);
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
+
+ ret = mlx90632_suspend(data);
+ if (ret < 0)
+ return ret;
- return mlx90632_sleep(data);
+ ret = regulator_disable(data->regulator);
+ if (ret < 0)
+ dev_err(regmap_get_device(data->regmap),
+ "Failed to disable power regulator: %d\n", ret);
+
+ return ret;
}
-static int __maybe_unused mlx90632_pm_resume(struct device *dev)
+static int mlx90632_pm_resume(struct device *dev)
{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct mlx90632_data *data = iio_priv(indio_dev);
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+ int ret;
+
+ ret = mlx90632_enable_regulator(data);
+ if (ret < 0)
+ return ret;
return mlx90632_wakeup(data);
}
-static UNIVERSAL_DEV_PM_OPS(mlx90632_pm_ops, mlx90632_pm_suspend,
- mlx90632_pm_resume, NULL);
+static int mlx90632_pm_runtime_suspend(struct device *dev)
+{
+ struct mlx90632_data *data = iio_priv(dev_get_drvdata(dev));
+
+ return mlx90632_pwr_set_sleep_step(data->regmap);
+}
+
+const struct dev_pm_ops mlx90632_pm_ops = {
+ SYSTEM_SLEEP_PM_OPS(mlx90632_pm_suspend, mlx90632_pm_resume)
+ RUNTIME_PM_OPS(mlx90632_pm_runtime_suspend, NULL, NULL)
+};
static struct i2c_driver mlx90632_driver = {
.driver = {
.name = "mlx90632",
.of_match_table = mlx90632_of_match,
- .pm = &mlx90632_pm_ops,
+ .pm = pm_ptr(&mlx90632_pm_ops),
},
.probe = mlx90632_probe,
- .remove = mlx90632_remove,
.id_table = mlx90632_id,
};
module_i2c_driver(mlx90632_driver);
--
2.34.1Le 22/09/2022 à 10:13, cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org a écrit :
> From: Crt Mori <cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org>
>
> The sensor can operate in lower power modes and even make measurements when
> in those lower powered modes. The decision was taken that if measurement
> is not requested within 2 seconds the sensor will remain in SLEEP_STEP
> power mode, where measurements are triggered on request with setting the
> start of measurement bit (SOB). In this mode the measurements are taking
> a bit longer because we need to start it and complete it. Currently, in
> continuous mode we read ready data and this mode is activated if sensor
> measurement is requested within 2 seconds. The suspend timeout is
> increased to 6 seconds (instead of 3 before), because that enables more
> measurements in lower power mode (SLEEP_STEP), with the lowest refresh
> rate (2 seconds).
Hi,
should there be a v7, a few nitpick below.
>
> Signed-off-by: Crt Mori <cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org>
> ---
> drivers/iio/temperature/mlx90632.c | 379 +++++++++++++++++++++++------
> 1 file changed, 309 insertions(+), 70 deletions(-)
>
> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
> index 549c0ab5c2be..71130d237a69 100644
> --- a/drivers/iio/temperature/mlx90632.c
> +++ b/drivers/iio/temperature/mlx90632.c
> @@ -6,11 +6,14 @@
> *
> * Driver for the Melexis MLX90632 I2C 16-bit IR thermopile sensor
> */
> +#include <linux/bitfield.h>
> #include <linux/delay.h>
> +#include <linux/device.h>
> #include <linux/err.h>
> #include <linux/gpio/consumer.h>
> #include <linux/i2c.h>
> #include <linux/iopoll.h>
> +#include <linux/jiffies.h>
> #include <linux/kernel.h>
> #include <linux/limits.h>
> #include <linux/mod_devicetable.h>
> @@ -55,6 +58,12 @@
> #define MLX90632_EE_Ha 0x2481 /* Ha customer calib value reg 16bit */
> #define MLX90632_EE_Hb 0x2482 /* Hb customer calib value reg 16bit */
>
> +#define MLX90632_EE_MEDICAL_MEAS1 0x24E1 /* Medical measurement 1 16bit */
> +#define MLX90632_EE_MEDICAL_MEAS2 0x24E2 /* Medical measurement 2 16bit */
> +#define MLX90632_EE_EXTENDED_MEAS1 0x24F1 /* Extended measurement 1 16bit */
> +#define MLX90632_EE_EXTENDED_MEAS2 0x24F2 /* Extended measurement 2 16bit */
> +#define MLX90632_EE_EXTENDED_MEAS3 0x24F3 /* Extended measurement 3 16bit */
> +
> /* Register addresses - volatile */
> #define MLX90632_REG_I2C_ADDR 0x3000 /* Chip I2C address register */
>
> @@ -62,13 +71,16 @@
> #define MLX90632_REG_CONTROL 0x3001 /* Control Register address */
> #define MLX90632_CFG_PWR_MASK GENMASK(2, 1) /* PowerMode Mask */
> #define MLX90632_CFG_MTYP_MASK GENMASK(8, 4) /* Meas select Mask */
> +#define MLX90632_CFG_SOB_MASK BIT(11)
>
> /* PowerModes statuses */
> #define MLX90632_PWR_STATUS(ctrl_val) (ctrl_val << 1)
> #define MLX90632_PWR_STATUS_HALT MLX90632_PWR_STATUS(0) /* hold */
> -#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step*/
> +#define MLX90632_PWR_STATUS_SLEEP_STEP MLX90632_PWR_STATUS(1) /* sleep step */
> #define MLX90632_PWR_STATUS_STEP MLX90632_PWR_STATUS(2) /* step */
> -#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous*/
> +#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
> +
> +#define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
>
> /* Measurement types */
> #define MLX90632_MTYP_MEDICAL 0
> @@ -116,8 +128,9 @@
> #define MLX90632_REF_12 12LL /* ResCtrlRef value of Ch 1 or Ch 2 */
> #define MLX90632_REF_3 12LL /* ResCtrlRef value of Channel 3 */
> #define MLX90632_MAX_MEAS_NUM 31 /* Maximum measurements in list */
> -#define MLX90632_SLEEP_DELAY_MS 3000 /* Autosleep delay */
> +#define MLX90632_SLEEP_DELAY_MS 6000 /* Autosleep delay */
> #define MLX90632_EXTENDED_LIMIT 27000 /* Extended mode raw value limit */
> +#define MLX90632_MEAS_MAX_TIME 2000 /* Max measurement time in ms for the lowest refresh rate */
>
> /**
> * struct mlx90632_data - private data for the MLX90632 device
> @@ -130,6 +143,9 @@
> * @object_ambient_temperature: Ambient temperature at object (might differ of
> * the ambient temperature of sensor.
> * @regulator: Regulator of the device
> + * @powerstatus: Current POWER status of the device
> + * @interaction_ts: Timestamp of the last temperature read that is used
> + * for power management in jiffies
> */
> struct mlx90632_data {
> struct i2c_client *client;
> @@ -139,6 +155,8 @@ struct mlx90632_data {
> u8 mtyp;
> u32 object_ambient_temperature;
> struct regulator *regulator;
> + int powerstatus;
> + unsigned long interaction_ts;
> };
>
> static const struct regmap_range mlx90632_volatile_reg_range[] = {
> @@ -158,6 +176,8 @@ static const struct regmap_range mlx90632_read_reg_range[] = {
> regmap_reg_range(MLX90632_EE_VERSION, MLX90632_EE_Ka),
> regmap_reg_range(MLX90632_EE_CTRL, MLX90632_EE_I2C_ADDR),
> regmap_reg_range(MLX90632_EE_Ha, MLX90632_EE_Hb),
> + regmap_reg_range(MLX90632_EE_MEDICAL_MEAS1, MLX90632_EE_MEDICAL_MEAS2),
> + regmap_reg_range(MLX90632_EE_EXTENDED_MEAS1, MLX90632_EE_EXTENDED_MEAS3),
> regmap_reg_range(MLX90632_REG_I2C_ADDR, MLX90632_REG_CONTROL),
> regmap_reg_range(MLX90632_REG_I2C_CMD, MLX90632_REG_I2C_CMD),
> regmap_reg_range(MLX90632_REG_STATUS, MLX90632_REG_STATUS),
> @@ -198,16 +218,38 @@ static const struct regmap_config mlx90632_regmap = {
>
> static s32 mlx90632_pwr_set_sleep_step(struct regmap *regmap)
Not related to this patch, but why s32 and not int?
It would be more in line with places where this function is used.
> {
> - return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
> - MLX90632_CFG_PWR_MASK,
> - MLX90632_PWR_STATUS_SLEEP_STEP);
> + struct mlx90632_data *data =
> + iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
> + s32 ret;
> +
> + if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
> + return 0;
> +
> + ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
> + MLX90632_PWR_STATUS_SLEEP_STEP);
> + if (ret < 0)
> + return ret;
> +
> + data->powerstatus = MLX90632_PWR_STATUS_SLEEP_STEP;
> + return ret;
return 0; ?
> }
>
> static s32 mlx90632_pwr_continuous(struct regmap *regmap)
Not related to this patch, but why s32 and not int?
It would be more in line with places where this function is used.
> {
> - return regmap_update_bits(regmap, MLX90632_REG_CONTROL,
> - MLX90632_CFG_PWR_MASK,
> - MLX90632_PWR_STATUS_CONTINUOUS);
> + struct mlx90632_data *data =
> + iio_priv(dev_get_drvdata(regmap_get_device(regmap)));
> + s32 ret;
> +
> + if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS)
> + return 0;
> +
> + ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL, MLX90632_CFG_PWR_MASK,
> + MLX90632_PWR_STATUS_CONTINUOUS);
> + if (ret < 0)
> + return ret;
> +
> + data->powerstatus = MLX90632_PWR_STATUS_CONTINUOUS;
> + return ret;
return 0; ?
> }
>
> /**
> @@ -219,6 +261,63 @@ static void mlx90632_reset_delay(void)
> usleep_range(150, 200);
> }
>
> +static int mlx90632_get_measurement_time(struct regmap *regmap, u16 meas)
> +{
> + unsigned int reg;
> + int ret;
> +
> + ret = regmap_read(regmap, meas, ®);
> + if (ret < 0)
> + return ret;
> +
> + return MLX90632_MEAS_MAX_TIME >> FIELD_GET(MLX90632_EE_RR, reg);
> +}
> +
> +static int mlx90632_calculate_dataset_ready_time(struct mlx90632_data *data)
> +{
> + unsigned int refresh_time;
> + int ret;
> +
> + if (data->mtyp == MLX90632_MTYP_MEDICAL) {
> + ret = mlx90632_get_measurement_time(data->regmap,
> + MLX90632_EE_MEDICAL_MEAS1);
> + if (ret < 0)
> + return ret;
> +
> + refresh_time = ret;
> +
> + ret = mlx90632_get_measurement_time(data->regmap,
> + MLX90632_EE_MEDICAL_MEAS2);
> + if (ret < 0)
> + return ret;
> +
> + refresh_time += ret;
> + } else {
> + ret = mlx90632_get_measurement_time(data->regmap,
> + MLX90632_EE_EXTENDED_MEAS1);
> + if (ret < 0)
> + return ret;
> +
> + refresh_time = ret;
> +
> + ret = mlx90632_get_measurement_time(data->regmap,
> + MLX90632_EE_EXTENDED_MEAS2);
> + if (ret < 0)
> + return ret;
> +
> + refresh_time += ret;
> +
> + ret = mlx90632_get_measurement_time(data->regmap,
> + MLX90632_EE_EXTENDED_MEAS3);
> + if (ret < 0)
> + return ret;
> +
> + refresh_time += ret;
> + }
> +
> + return refresh_time;
> +}
> +
> /**
> * mlx90632_perform_measurement() - Trigger and retrieve current measurement cycle
> * @data: pointer to mlx90632_data object containing regmap information
> @@ -249,26 +348,75 @@ static int mlx90632_perform_measurement(struct mlx90632_data *data)
> return (reg_status & MLX90632_STAT_CYCLE_POS) >> 2;
> }
>
> -static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
> +/**
> + * mlx90632_perform_measurement_burst() - Trigger and retrieve current measurement
> + * cycle in step sleep mode
> + * @data: pointer to mlx90632_data object containing regmap information
> + *
> + * Perform a measurement and return 2 as measurement cycle position reported
> + * by sensor. This is a blocking function for amount dependent on the sensor
> + * refresh rate.
> + */
> +static int mlx90632_perform_measurement_burst(struct mlx90632_data *data)
> {
> + unsigned int reg_status;
> int ret;
>
> - if ((type != MLX90632_MTYP_MEDICAL) && (type != MLX90632_MTYP_EXTENDED))
> - return -EINVAL;
> + ret = regmap_write_bits(data->regmap, MLX90632_REG_CONTROL,
> + MLX90632_CFG_SOB_MASK, MLX90632_CFG_SOB_MASK);
> + if (ret < 0)
> + return ret;
>
> - ret = regmap_write(regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
> + ret = mlx90632_calculate_dataset_ready_time(data);
> + if (ret < 0)
> + return ret;
> +
> + msleep(ret); /* Wait minimum time for dataset to be ready */
> +
> + ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
> + reg_status,
> + (reg_status & MLX90632_STAT_BUSY) == 0,
> + 10000, 100 * 10000);
> + if (ret < 0) {
> + dev_err(&data->client->dev, "data not ready");
> + return -ETIMEDOUT;
Why not "return ret;"?
> + }
> +
> + return 2;
> +}
> +
> +static int mlx90632_set_meas_type(struct mlx90632_data *data, u8 type)
> +{
> + int current_powerstatus;
> + int ret;
> +
> + if (data->mtyp == type)
> + return 0;
> +
> + current_powerstatus = data->powerstatus;
> + ret = mlx90632_pwr_continuous(data->regmap);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_write(data->regmap, MLX90632_REG_I2C_CMD, MLX90632_RESET_CMD);
> if (ret < 0)
> return ret;
>
> mlx90632_reset_delay();
>
> - ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
> + ret = regmap_update_bits(data->regmap, MLX90632_REG_CONTROL,
> (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
> (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));
> if (ret < 0)
> return ret;
>
> - return mlx90632_pwr_continuous(regmap);
> + data->mtyp = type;
> + data->powerstatus = MLX90632_PWR_STATUS_HALT;
> +
> + if (current_powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP)
> + return mlx90632_pwr_set_sleep_step(data->regmap);
> +
> + return mlx90632_pwr_continuous(data->regmap);
> }
>
> static int mlx90632_channel_new_select(int perform_ret, uint8_t *channel_new,
> @@ -355,11 +503,30 @@ static int mlx90632_read_all_channel(struct mlx90632_data *data,
> s32 ret, measurement;
>
> mutex_lock(&data->lock);
> - measurement = mlx90632_perform_measurement(data);
> - if (measurement < 0) {
> - ret = measurement;
> + ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
> + if (ret < 0)
> + goto read_unlock;
> +
> + switch (data->powerstatus) {
> + case MLX90632_PWR_STATUS_CONTINUOUS:
> + measurement = mlx90632_perform_measurement(data);
ret = mlx90632_perform_measurement(data);
and
measurement = ret;
on success would be less verbose (no need for {}, and save 1 LoC) and
more in line with mlx90632_calculate_dataset_ready_time() above.
> + if (measurement < 0) {
> + ret = measurement;
> + goto read_unlock;
> + }
> + break;
> + case MLX90632_PWR_STATUS_SLEEP_STEP:
> + measurement = mlx90632_perform_measurement_burst(data);
Same.
> + if (measurement < 0) {
> + ret = measurement;
> + goto read_unlock;
> + }
> + break;
> + default:
> + ret = -EOPNOTSUPP;
> goto read_unlock;
> }
> +
> ret = mlx90632_read_ambient_raw(data->regmap, ambient_new_raw,
> ambient_old_raw);
> if (ret < 0)
> @@ -441,14 +608,20 @@ static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *o
> s32 ret, meas;
>
> mutex_lock(&data->lock);
> - ret = mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_EXTENDED);
> + ret = mlx90632_set_meas_type(data, MLX90632_MTYP_EXTENDED);
> if (ret < 0)
> goto read_unlock;
>
> - ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
> - 50000, 800000, false, data);
> - if (ret != 0)
> - goto read_unlock;
> + if (data->powerstatus == MLX90632_PWR_STATUS_CONTINUOUS) {
> + ret = read_poll_timeout(mlx90632_perform_measurement, meas, meas == 19,
> + 50000, 800000, false, data);
> + if (ret)
> + goto read_unlock;
> + } else if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
> + ret = mlx90632_perform_measurement_burst(data);
> + if (ret < 0)
> + goto read_unlock;
> + }
>
> ret = mlx90632_read_object_raw_extended(data->regmap, object_new_raw);
> if (ret < 0)
> @@ -457,8 +630,6 @@ static int mlx90632_read_all_channel_extended(struct mlx90632_data *data, s16 *o
> ret = mlx90632_read_ambient_raw_extended(data->regmap, ambient_new_raw, ambient_old_raw);
>
> read_unlock:
> - (void) mlx90632_set_meas_type(data->regmap, MLX90632_MTYP_MEDICAL);
> -
> mutex_unlock(&data->lock);
> return ret;
> }
> @@ -743,12 +914,47 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
> return ret;
> }
>
> +/**
> + * mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
> + * @data: pointer to mlx90632_data object containing interaction_ts information
> + *
> + * Switch to continuous mode when interaction is faster than MLX90632_MEAS_MAX_TIME. Update the
> + * interaction_ts for each function call with the jiffies to enable measurement between function
> + * calls. Initial value of the interaction_ts needs to be set before this function call.
> + */
> +static int mlx90632_pm_interraction_wakeup(struct mlx90632_data *data)
> +{
> + unsigned long now;
> + int ret;
> +
> + now = jiffies;
> + if (time_in_range(now, data->interaction_ts,
> + data->interaction_ts +
> + msecs_to_jiffies(MLX90632_MEAS_MAX_TIME + 100))) {
> + if (data->powerstatus == MLX90632_PWR_STATUS_SLEEP_STEP) {
> + ret = mlx90632_pwr_continuous(data->regmap);
> + if (ret < 0)
> + return ret;
> + }
> + }
> +
> + data->interaction_ts = now;
> +
> + return 0;
> +}
> +
> static int mlx90632_read_raw(struct iio_dev *indio_dev,
> struct iio_chan_spec const *channel, int *val,
> int *val2, long mask)
> {
> struct mlx90632_data *data = iio_priv(indio_dev);
> int ret;
> + int cr;
This 'cr' seems to be unused.
> +
> + pm_runtime_get_sync(&data->client->dev);
> + ret = mlx90632_pm_interraction_wakeup(data);
> + if (ret < 0)
> + goto mlx90632_read_raw_pm;
[...]
On Sun, 2 Oct 2022 at 18:09, Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
>
> Le 22/09/2022 à 10:13, cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org a écrit :
> > From: Crt Mori <cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org>
> > measurements in lower power mode (SLEEP_STEP), with the lowest refresh
> > rate (2 seconds).
>
> Hi,
>
> should there be a v7, a few nitpick below.
>
It was already applied, but I can spin a new patch for the suggested
changes (the s32 is mostly there because before this patch it was
returning value for further bit manipulation).
> >
> > + ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
> > + reg_status,
> > + (reg_status & MLX90632_STAT_BUSY) == 0,
> > + 10000, 100 * 10000);
> > + if (ret < 0) {
> > + dev_err(&data->client->dev, "data not ready");
> > + return -ETIMEDOUT;
>
> Why not "return ret;"?
>
If you came to this point there were already several i2c reads, so I
think it is more important to convert those to timeout.
> > mutex_lock(&data->lock);
> > - measurement = mlx90632_perform_measurement(data);
> > - if (measurement < 0) {
> > - ret = measurement;
> > + ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
> > + if (ret < 0)
> > + goto read_unlock;
> > +
> > + switch (data->powerstatus) {
> > + case MLX90632_PWR_STATUS_CONTINUOUS:
> > + measurement = mlx90632_perform_measurement(data);
>
> ret = mlx90632_perform_measurement(data);
> and
> measurement = ret;
> on success would be less verbose (no need for {}, and save 1 LoC) and
> more in line with mlx90632_calculate_dataset_ready_time() above.
>
I wanted to change as few lines as possible to avoid clogging the
patch with unrelated changes. Also in most cases, we will be
in-success here, so limiting the number of variable copies in the
success path should be the priority.
On Mon, 3 Oct 2022 10:20:18 +0200
Crt Mori <cmo@melexis.com> wrote:
> On Sun, 2 Oct 2022 at 18:09, Christophe JAILLET
> <christophe.jaillet@wanadoo.fr> wrote:
> >
> > Le 22/09/2022 à 10:13, cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org a écrit :
> > > From: Crt Mori <cmo-fc6wVz46lShBDgjK7y7TUQ@public.gmane.org>
> > > measurements in lower power mode (SLEEP_STEP), with the lowest refresh
> > > rate (2 seconds).
> >
> > Hi,
> >
> > should there be a v7, a few nitpick below.
> >
> It was already applied, but I can spin a new patch for the suggested
> changes (the s32 is mostly there because before this patch it was
> returning value for further bit manipulation).
Follow on patch welcome!
Thanks,
Jonathan
>
> > >
> > > + ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS,
> > > + reg_status,
> > > + (reg_status & MLX90632_STAT_BUSY) == 0,
> > > + 10000, 100 * 10000);
> > > + if (ret < 0) {
> > > + dev_err(&data->client->dev, "data not ready");
> > > + return -ETIMEDOUT;
> >
> > Why not "return ret;"?
> >
> If you came to this point there were already several i2c reads, so I
> think it is more important to convert those to timeout.
>
> > > mutex_lock(&data->lock);
> > > - measurement = mlx90632_perform_measurement(data);
> > > - if (measurement < 0) {
> > > - ret = measurement;
> > > + ret = mlx90632_set_meas_type(data, MLX90632_MTYP_MEDICAL);
> > > + if (ret < 0)
> > > + goto read_unlock;
> > > +
> > > + switch (data->powerstatus) {
> > > + case MLX90632_PWR_STATUS_CONTINUOUS:
> > > + measurement = mlx90632_perform_measurement(data);
> >
> > ret = mlx90632_perform_measurement(data);
> > and
> > measurement = ret;
> > on success would be less verbose (no need for {}, and save 1 LoC) and
> > more in line with mlx90632_calculate_dataset_ready_time() above.
> >
> I wanted to change as few lines as possible to avoid clogging the
> patch with unrelated changes. Also in most cases, we will be
> in-success here, so limiting the number of variable copies in the
> success path should be the priority.
Le 02/10/2022 à 18:09, Christophe JAILLET a écrit :
>> static int mlx90632_read_raw(struct iio_dev *indio_dev,
>> struct iio_chan_spec const *channel, int *val,
>> int *val2, long mask)
>> {
>> struct mlx90632_data *data = iio_priv(indio_dev);
>> int ret;
>> + int cr;
>
> This 'cr' seems to be unused.
Ok, used in patch 2/3.
Sorry for the noise.
CJ
>
>> +
>> + pm_runtime_get_sync(&data->client->dev);
>> + ret = mlx90632_pm_interraction_wakeup(data);
>> + if (ret < 0)
>> + goto mlx90632_read_raw_pm;
>
> [...]
>
On Sun, Oct 2, 2022 at 7:11 PM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
> Le 02/10/2022 à 18:09, Christophe JAILLET a écrit :
...
> >> static int mlx90632_read_raw(struct iio_dev *indio_dev,
> >> struct iio_chan_spec const *channel, int *val,
> >> int *val2, long mask)
> >> {
> >> struct mlx90632_data *data = iio_priv(indio_dev);
> >> int ret;
> >> + int cr;
> >
> > This 'cr' seems to be unused.
>
> Ok, used in patch 2/3.
> Sorry for the noise.
But it should be used in this patch if it was introduced by it.
--
With Best Regards,
Andy Shevchenko
© 2016 - 2026 Red Hat, Inc.