Provide possibility to toggle power supply to the sensor so that user
can optimize their setup and not have the sensor constantly powered.
Signed-off-by: Crt Mori <[email protected]>
---
drivers/iio/temperature/mlx90632.c | 61 +++++++++++++++++++++++++++---
1 file changed, 56 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index 7ee7ff8047a4..549c0ab5c2be 100644
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -18,6 +18,7 @@
#include <linux/math64.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -128,6 +129,7 @@
* calculations
* @object_ambient_temperature: Ambient temperature at object (might differ of
* the ambient temperature of sensor.
+ * @regulator: Regulator of the device
*/
struct mlx90632_data {
struct i2c_client *client;
@@ -136,6 +138,7 @@ struct mlx90632_data {
u16 emissivity;
u8 mtyp;
u32 object_ambient_temperature;
+ struct regulator *regulator;
};
static const struct regmap_range mlx90632_volatile_reg_range[] = {
@@ -207,6 +210,15 @@ static s32 mlx90632_pwr_continuous(struct regmap *regmap)
MLX90632_PWR_STATUS_CONTINUOUS);
}
+/**
+ * mlx90632_reset_delay() - Give the mlx90632 some time to reset properly
+ * If this is not done, the following I2C command(s) will not be accepted.
+ */
+static void mlx90632_reset_delay(void)
+{
+ usleep_range(150, 200);
+}
+
/**
* mlx90632_perform_measurement() - Trigger and retrieve current measurement cycle
* @data: pointer to mlx90632_data object containing regmap information
@@ -248,11 +260,7 @@ static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
if (ret < 0)
return ret;
- /*
- * Give the mlx90632 some time to reset properly before sending a new I2C command
- * if this is not done, the following I2C command(s) will not be accepted.
- */
- usleep_range(150, 200);
+ mlx90632_reset_delay();
ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
(MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
@@ -841,6 +849,32 @@ static int mlx90632_wakeup(struct mlx90632_data *data)
return mlx90632_pwr_continuous(data->regmap);
}
+static void mlx90632_disable_regulator(void *_data)
+{
+ struct mlx90632_data *data = _data;
+ int ret;
+
+ ret = regulator_disable(data->regulator);
+ if (ret < 0)
+ dev_err(regmap_get_device(data->regmap),
+ "Failed to disable power regulator: %d\n", ret);
+}
+
+static int mlx90632_enable_regulator(struct mlx90632_data *data)
+{
+ int ret;
+
+ ret = regulator_enable(data->regulator);
+ if (ret < 0) {
+ dev_err(regmap_get_device(data->regmap), "Failed to enable power regulator!\n");
+ return ret;
+ }
+
+ mlx90632_reset_delay();
+
+ return ret;
+}
+
static int mlx90632_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -876,6 +910,23 @@ static int mlx90632_probe(struct i2c_client *client,
indio_dev->channels = mlx90632_channels;
indio_dev->num_channels = ARRAY_SIZE(mlx90632_channels);
+ mlx90632->regulator = devm_regulator_get(&client->dev, "vdd");
+ if (IS_ERR(mlx90632->regulator))
+ return dev_err_probe(&client->dev, PTR_ERR(mlx90632->regulator),
+ "failed to get vdd regulator");
+
+ ret = mlx90632_enable_regulator(mlx90632);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_add_action_or_reset(&client->dev, mlx90632_disable_regulator,
+ mlx90632);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to setup regulator cleanup action %d\n",
+ ret);
+ return ret;
+ }
+
ret = mlx90632_wakeup(mlx90632);
if (ret < 0) {
dev_err(&client->dev, "Wakeup failed: %d\n", ret);
--
2.34.1