| Message ID | 1546938294-26888-1-git-send-email-Anson.Huang@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [V9] iio: light: isl29018: add vcc regulator operation support | expand |
On Tue, 8 Jan 2019 09:09:39 +0000 Anson Huang <anson.huang@nxp.com> wrote: > 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> Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > ChangeLog since V8: > - use devm_add_action_or_reset instead of devm_add_action to avoid calling regulator disable when failed; > --- > drivers/iio/light/isl29018.c | 46 +++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 45 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c > index b45400f..846df4d 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;
diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c index b45400f..846df4d 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;
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> --- ChangeLog since V8: - use devm_add_action_or_reset instead of devm_add_action to avoid calling regulator disable when failed; --- drivers/iio/light/isl29018.c | 46 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-)