Like all other ST sensors, st_lsm6dsx devices have VDD and VDDIO power
lines. Introduce voltage regulators to control them.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 3 ++
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 42 ++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
index 1f31657a7a0e..4b4ec39d4400 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -13,6 +13,7 @@
#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"
@@ -368,6 +369,7 @@ struct st_lsm6dsx_sensor {
* 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.
+ * @regulators: VDD/VDDIO voltage regulators.
* @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.
@@ -390,6 +392,7 @@ struct st_lsm6dsx_sensor {
struct st_lsm6dsx_hw {
struct device *dev;
struct regmap *regmap;
+ struct regulator_bulk_data regulators[2];
int irq;
struct mutex fifo_lock;
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index 5e584c6026f1..fde46377826c 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -2533,6 +2533,40 @@ static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw)
return 0;
}
+static int st_lsm6dsx_init_regulators(struct device *dev)
+{
+ struct st_lsm6dsx_hw *hw = dev_get_drvdata(dev);
+ int err;
+
+ /* vdd-vddio power regulators */
+ hw->regulators[0].supply = "vdd";
+ hw->regulators[1].supply = "vddio";
+ err = devm_regulator_bulk_get(dev, ARRAY_SIZE(hw->regulators),
+ hw->regulators);
+ if (err) {
+ dev_err(dev, "failed to get regulators: %d\n", err);
+ return err;
+ }
+
+ err = regulator_bulk_enable(ARRAY_SIZE(hw->regulators),
+ hw->regulators);
+ if (err) {
+ dev_err(dev, "failed to enable regulators: %d\n", err);
+ return err;
+ }
+
+ msleep(50);
+
+ return 0;
+}
+
+static void st_lsm6dsx_chip_uninit(void *data)
+{
+ struct st_lsm6dsx_hw *hw = data;
+
+ regulator_bulk_disable(ARRAY_SIZE(hw->regulators), hw->regulators);
+}
+
int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
struct regmap *regmap)
{
@@ -2552,6 +2586,14 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
mutex_init(&hw->conf_lock);
mutex_init(&hw->page_lock);
+ err = st_lsm6dsx_init_regulators(dev);
+ if (err)
+ return err;
+
+ err = devm_add_action_or_reset(dev, st_lsm6dsx_chip_uninit, hw);
+ if (err)
+ return err;
+
hw->buff = devm_kzalloc(dev, ST_LSM6DSX_BUFF_SIZE, GFP_KERNEL);
if (!hw->buff)
return -ENOMEM;
--
2.26.2
