> On Tue, 17 Nov 2020 17:47:25 +0100
> Lorenzo Bianconi <lorenzo@xxxxxxxxxx> wrote:
>
> > 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>
> Oops. I should have pointed out the dev_err_probe more appropriate
> to avoid complaining when we just tried to probe to early in the
> sequence and will try again later. I'll hopefully fix this
> up an apply once I've picked up my own patch to do the yaml conversion.
>
ack, fine for me otherwise I can just send v3. Up to you.
Regards,
Lorenzo
> Jonathan
>
> > ---
> > 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;
>
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