diff options
author | Anson Huang <anson.huang@nxp.com> | 2019-01-08 10:09:39 +0100 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-01-12 20:02:00 +0100 |
commit | 1a02d1239389a9ef81daf4913ce60e9f71f8a61f (patch) | |
tree | 7590dff3aef9ef11d2c54d2a38a8a67b16274ee4 /drivers/iio | |
parent | iio: magnetometer: mag3110: add vdd/vddio regulator operation support (diff) | |
download | linux-1a02d1239389a9ef81daf4913ce60e9f71f8a61f.tar.xz linux-1a02d1239389a9ef81daf4913ce60e9f71f8a61f.zip |
iio: light: isl29018: add vcc regulator operation support
The light sensor's power supply could be controllable by regulator
on some platforms, such as i.MX6Q-SABRESD board, the light sensor
isl29023's power supply is controlled by a GPIO fixed regulator,
need to make sure the regulator is enabled before any operation of
sensor, this patch adds vcc regulator operation support.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r-- | drivers/iio/light/isl29018.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c index b45400f8fef4..846df4dce48c 100644 --- a/drivers/iio/light/isl29018.c +++ b/drivers/iio/light/isl29018.c @@ -23,6 +23,7 @@ #include <linux/mutex.h> #include <linux/delay.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -95,6 +96,7 @@ struct isl29018_chip { struct isl29018_scale scale; int prox_scheme; bool suspended; + struct regulator *vcc_reg; }; static int isl29018_set_integration_time(struct isl29018_chip *chip, @@ -708,6 +710,16 @@ static const char *isl29018_match_acpi_device(struct device *dev, int *data) return dev_name(dev); } +static void isl29018_disable_regulator_action(void *_data) +{ + struct isl29018_chip *chip = _data; + int err; + + err = regulator_disable(chip->vcc_reg); + if (err) + pr_err("failed to disable isl29018's VCC regulator!\n"); +} + static int isl29018_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -742,6 +754,27 @@ static int isl29018_probe(struct i2c_client *client, chip->scale = isl29018_scales[chip->int_time][0]; chip->suspended = false; + chip->vcc_reg = devm_regulator_get(&client->dev, "vcc"); + if (IS_ERR(chip->vcc_reg)) { + err = PTR_ERR(chip->vcc_reg); + if (err != -EPROBE_DEFER) + dev_err(&client->dev, "failed to get VCC regulator!\n"); + return err; + } + + err = regulator_enable(chip->vcc_reg); + if (err) { + dev_err(&client->dev, "failed to enable VCC regulator!\n"); + return err; + } + + err = devm_add_action_or_reset(&client->dev, isl29018_disable_regulator_action, + chip); + if (err) { + dev_err(&client->dev, "failed to setup regulator cleanup action!\n"); + return err; + } + chip->regmap = devm_regmap_init_i2c(client, isl29018_chip_info_tbl[dev_id].regmap_cfg); if (IS_ERR(chip->regmap)) { @@ -768,6 +801,7 @@ static int isl29018_probe(struct i2c_client *client, static int isl29018_suspend(struct device *dev) { struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev)); + int ret; mutex_lock(&chip->lock); @@ -777,10 +811,13 @@ static int isl29018_suspend(struct device *dev) * So we do not have much to do here. */ chip->suspended = true; + ret = regulator_disable(chip->vcc_reg); + if (ret) + dev_err(dev, "failed to disable VCC regulator\n"); mutex_unlock(&chip->lock); - return 0; + return ret; } static int isl29018_resume(struct device *dev) @@ -790,6 +827,13 @@ static int isl29018_resume(struct device *dev) mutex_lock(&chip->lock); + err = regulator_enable(chip->vcc_reg); + if (err) { + dev_err(dev, "failed to enable VCC regulator\n"); + mutex_unlock(&chip->lock); + return err; + } + err = isl29018_chip_init(chip); if (!err) chip->suspended = false; |