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| author |   Lorenzo Bianconi <lorenzo@kernel.org> | 2020-11-22 12:56:48 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-12-03 19:32:39 +0000 |
| commit | aa784a54102e93221030cb702430b5e953f4b347 (patch) | |
| tree | 23109bb73f8f40dec44df84cfa738ded14b52532 /drivers/iio/humidity | |
| parent | MAINTAINERS: Add Kamel Bouhara as TCB counter driver maintainer (diff) | |
| download | linux-dev-aa784a54102e93221030cb702430b5e953f4b347.tar.xz linux-dev-aa784a54102e93221030cb702430b5e953f4b347.zip | |
iio: humidity: hts221: add vdd voltage regulator
Like all other ST sensors, hts221 devices have VDD power line.
Introduce VDD voltage regulator to control it.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/6b3347e78f4f920c48eb6a66936d3b69cb9ff53a.1606045688.git.lorenzo@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/humidity')
| -rw-r--r-- | drivers/iio/humidity/hts221.h | 2 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_core.c | 37 |
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/iio/humidity/hts221.h b/drivers/iio/humidity/hts221.h index 721359e226cb..cf3d8d2dccd6 100644 --- a/drivers/iio/humidity/hts221.h +++ b/drivers/iio/humidity/hts221.h @@ -13,6 +13,7 @@ #define HTS221_DEV_NAME "hts221" #include <linux/iio/iio.h> +#include <linux/regulator/consumer.h> enum hts221_sensor_type { HTS221_SENSOR_H, @@ -29,6 +30,7 @@ struct hts221_hw { const char *name; struct device *dev; struct regmap *regmap; + struct regulator *vdd; struct iio_trigger *trig; int irq; diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c index 16657789dc45..6a39615b6961 100644 --- a/drivers/iio/humidity/hts221_core.c +++ b/drivers/iio/humidity/hts221_core.c @@ -547,6 +547,35 @@ static const struct iio_info hts221_info = { static const unsigned long hts221_scan_masks[] = {0x3, 0x0}; +static int hts221_init_regulators(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hts221_hw *hw = iio_priv(iio_dev); + int err; + + hw->vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(hw->vdd)) + return dev_err_probe(dev, PTR_ERR(hw->vdd), + "failed to get vdd regulator\n"); + + err = regulator_enable(hw->vdd); + if (err) { + dev_err(dev, "failed to enable vdd regulator: %d\n", err); + return err; + } + + msleep(50); + + return 0; +} + +static void hts221_chip_uninit(void *data) +{ + struct hts221_hw *hw = data; + + regulator_disable(hw->vdd); +} + int hts221_probe(struct device *dev, int irq, const char *name, struct regmap *regmap) { @@ -567,6 +596,14 @@ int hts221_probe(struct device *dev, int irq, const char *name, hw->irq = irq; hw->regmap = regmap; + err = hts221_init_regulators(dev); + if (err) + return err; + + err = devm_add_action_or_reset(dev, hts221_chip_uninit, hw); + if (err) + return err; + err = hts221_check_whoami(hw); if (err < 0) return err; |