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SubjectRe: [PATCH v4 4/5] iio: imu: bmi160: added regulator support
On Mon, 25 May 2020 18:46:03 +0200
Jonathan Albrieux <jonathan.albrieux@gmail.com> wrote:

> Add vdd-supply and vddio-supply support.
>
> While working on an msm8916 device and having explicit declarations for
> regulators, without setting these regulators to regulators-always-on it
> happened those lines weren't ready because they could have been controlled
> by other components, causing failure in module's probe.
>
> This patch aim is to solve this situation by adding regulators control
> during bmi160_chip_init() and bmi160_chip_uninit(), assuring power to
> this component.
>
> Signed-off-by: Jonathan Albrieux <jonathan.albrieux@gmail.com>

Applied,

Thanks,

Jonathan

> ---
> drivers/iio/imu/bmi160/bmi160.h | 2 ++
> drivers/iio/imu/bmi160/bmi160_core.c | 24 ++++++++++++++++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/drivers/iio/imu/bmi160/bmi160.h b/drivers/iio/imu/bmi160/bmi160.h
> index 621f5309d735..923c3b274fde 100644
> --- a/drivers/iio/imu/bmi160/bmi160.h
> +++ b/drivers/iio/imu/bmi160/bmi160.h
> @@ -3,10 +3,12 @@
> #define BMI160_H_
>
> #include <linux/iio/iio.h>
> +#include <linux/regulator/consumer.h>
>
> struct bmi160_data {
> struct regmap *regmap;
> struct iio_trigger *trig;
> + struct regulator_bulk_data supplies[2];
> };
>
> extern const struct regmap_config bmi160_regmap_config;
> diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
> index 77b05bd4a2b2..d3316ca02fbd 100644
> --- a/drivers/iio/imu/bmi160/bmi160_core.c
> +++ b/drivers/iio/imu/bmi160/bmi160_core.c
> @@ -15,6 +15,7 @@
> #include <linux/delay.h>
> #include <linux/irq.h>
> #include <linux/of_irq.h>
> +#include <linux/regulator/consumer.h>
>
> #include <linux/iio/iio.h>
> #include <linux/iio/triggered_buffer.h>
> @@ -709,6 +710,12 @@ static int bmi160_chip_init(struct bmi160_data *data, bool use_spi)
> unsigned int val;
> struct device *dev = regmap_get_device(data->regmap);
>
> + ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies), data->supplies);
> + if (ret) {
> + dev_err(dev, "Failed to enable regulators: %d\n", ret);
> + return ret;
> + }
> +
> ret = regmap_write(data->regmap, BMI160_REG_CMD, BMI160_CMD_SOFTRESET);
> if (ret)
> return ret;
> @@ -793,9 +800,16 @@ int bmi160_probe_trigger(struct iio_dev *indio_dev, int irq, u32 irq_type)
> static void bmi160_chip_uninit(void *data)
> {
> struct bmi160_data *bmi_data = data;
> + struct device *dev = regmap_get_device(bmi_data->regmap);
> + int ret;
>
> bmi160_set_mode(bmi_data, BMI160_GYRO, false);
> bmi160_set_mode(bmi_data, BMI160_ACCEL, false);
> +
> + ret = regulator_bulk_disable(ARRAY_SIZE(bmi_data->supplies),
> + bmi_data->supplies);
> + if (ret)
> + dev_err(dev, "Failed to disable regulators: %d\n", ret);
> }
>
> int bmi160_core_probe(struct device *dev, struct regmap *regmap,
> @@ -815,6 +829,16 @@ int bmi160_core_probe(struct device *dev, struct regmap *regmap,
> dev_set_drvdata(dev, indio_dev);
> data->regmap = regmap;
>
> + data->supplies[0].supply = "vdd";
> + data->supplies[1].supply = "vddio";
> + ret = devm_regulator_bulk_get(dev,
> + ARRAY_SIZE(data->supplies),
> + data->supplies);
> + if (ret) {
> + dev_err(dev, "Failed to get regulators: %d\n", ret);
> + return ret;
> + }
> +
> ret = bmi160_chip_init(data, use_spi);
> if (ret)
> return ret;

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