| Message ID | 1544066850-22617-1-git-send-email-Anson.Huang@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [V2] iio: light: isl29018: add optional vcc regulator operation support | expand |
On Thu, 6 Dec 2018 03:33:16 +0000 Anson Huang <anson.huang@nxp.com> wrote: > The light sensor's power supply could be controlled 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 optional vcc regulator operation support. > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> > --- > ChangeLog: > replace "VDD" with "VCC" since the regulator name is vcc_reg. Fabio has raised naming concerns so I'll assume we'll see a v3 with that. One other comment inline. Jonathan > --- > drivers/iio/light/isl29018.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c > index b45400f..87dcbce 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, > @@ -735,6 +737,15 @@ static int isl29018_probe(struct i2c_client *client, > > mutex_init(&chip->lock); > > + chip->vcc_reg = devm_regulator_get_optional(&client->dev, "vcc"); > + if (!IS_ERR(chip->vcc_reg)) { We should probably handle the case of deferred explicitly rather than assuming all errors mean the regulator hasn't been provided. > + err = regulator_enable(chip->vcc_reg); > + if (err) { > + dev_err(&client->dev, "failed to enable VCC regulator\n"); > + return err; > + } > + } > + > chip->type = dev_id; > chip->calibscale = 1; > chip->ucalibscale = 0; > @@ -768,6 +779,7 @@ 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); > > @@ -777,6 +789,14 @@ static int isl29018_suspend(struct device *dev) > * So we do not have much to do here. > */ > chip->suspended = true; > + if (!IS_ERR(chip->vcc_reg)) { > + ret = regulator_disable(chip->vcc_reg); > + if (ret) { > + dev_err(dev, "failed to disable VCC regulator\n"); > + mutex_unlock(&chip->lock); > + return ret; > + } > + } > > mutex_unlock(&chip->lock); > > @@ -790,6 +810,15 @@ static int isl29018_resume(struct device *dev) > > mutex_lock(&chip->lock); > > + if (!IS_ERR(chip->vcc_reg)) { > + 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..87dcbce 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, @@ -735,6 +737,15 @@ static int isl29018_probe(struct i2c_client *client, mutex_init(&chip->lock); + chip->vcc_reg = devm_regulator_get_optional(&client->dev, "vcc"); + if (!IS_ERR(chip->vcc_reg)) { + err = regulator_enable(chip->vcc_reg); + if (err) { + dev_err(&client->dev, "failed to enable VCC regulator\n"); + return err; + } + } + chip->type = dev_id; chip->calibscale = 1; chip->ucalibscale = 0; @@ -768,6 +779,7 @@ 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); @@ -777,6 +789,14 @@ static int isl29018_suspend(struct device *dev) * So we do not have much to do here. */ chip->suspended = true; + if (!IS_ERR(chip->vcc_reg)) { + ret = regulator_disable(chip->vcc_reg); + if (ret) { + dev_err(dev, "failed to disable VCC regulator\n"); + mutex_unlock(&chip->lock); + return ret; + } + } mutex_unlock(&chip->lock); @@ -790,6 +810,15 @@ static int isl29018_resume(struct device *dev) mutex_lock(&chip->lock); + if (!IS_ERR(chip->vcc_reg)) { + 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 controlled 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 optional vcc regulator operation support. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> --- ChangeLog: replace "VDD" with "VCC" since the regulator name is vcc_reg. --- drivers/iio/light/isl29018.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)