| Message ID | 1544504839-10958-1-git-send-email-Anson.Huang@nxp.com |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | [V4,1/2] dt-bindings: iio: accel: mma8452: add optional power supply property | expand |
| Context | Check | Description |
|---|---|---|
| robh/checkpatch | success |
On Tue, 11 Dec 2018 05:13:14 +0000 Anson Huang <anson.huang@nxp.com> wrote: > The accelerometer's power supply could be controlled by regulator > on some platforms, add optional property "vdd/vddio" power supply > to let device tree to pass phandles to the regulators to driver. > > 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. I'll not be pushing this out as non rebasing for a week or so hence plenty of time to add additional reviews. Thanks, Jonathan > --- > Documentation/devicetree/bindings/iio/accel/mma8452.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt b/Documentation/devicetree/bindings/iio/accel/mma8452.txt > index 2100e9a..e132394 100644 > --- a/Documentation/devicetree/bindings/iio/accel/mma8452.txt > +++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt > @@ -20,6 +20,10 @@ Optional properties: > - interrupt-names: should contain "INT1" and/or "INT2", the accelerometer's > interrupt line in use. > > + - vdd-supply: phandle to the regulator that provides vdd power to the accelerometer. > + > + - vddio-supply: phandle to the regulator that provides vddio power to the accelerometer. > + > Example: > > mma8453fc@1d {
On Tue, 11 Dec 2018 05:13:20 +0000 Anson Huang <anson.huang@nxp.com> wrote: > The accelerometer's power supply could be controlled by regulator > on some platforms, such as i.MX6Q-SABRESD board, the mma8451's > power supply is controlled by a GPIO fixed regulator, need to make > sure the regulator is enabled before any communication with mma8451, > this patch adds optional vdd/vddio regulator operation support. > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> > Acked-by: Martin Kepplinger <martink@posteo.de> Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > ChangeLog since V3: > - add disabling vdd regulator in vddio error path; > - improve regulator enable/disable sequence. > --- > drivers/iio/accel/mma8452.c | 186 +++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 176 insertions(+), 10 deletions(-) > > diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c > index 421a0a8..590a95d 100644 > --- a/drivers/iio/accel/mma8452.c > +++ b/drivers/iio/accel/mma8452.c > @@ -31,6 +31,7 @@ > #include <linux/of_device.h> > #include <linux/of_irq.h> > #include <linux/pm_runtime.h> > +#include <linux/regulator/consumer.h> > > #define MMA8452_STATUS 0x00 > #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) > @@ -107,6 +108,8 @@ struct mma8452_data { > u8 data_cfg; > const struct mma_chip_info *chip_info; > int sleep_val; > + struct regulator *vdd_reg; > + struct regulator *vddio_reg; > }; > > /** > @@ -1533,10 +1536,35 @@ static int mma8452_probe(struct i2c_client *client, > data->client = client; > mutex_init(&data->lock); > data->chip_info = match->data; > + data->vdd_reg = devm_regulator_get_optional(&client->dev, "vdd"); > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_enable(data->vdd_reg); > + if (ret) { > + dev_err(&client->dev, "failed to enable VDD regulator\n"); > + return ret; > + } > + } else { > + ret = PTR_ERR(data->vdd_reg); > + if (ret != -ENODEV) > + return ret; > + } > + > + data->vddio_reg = devm_regulator_get_optional(&client->dev, "vddio"); > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_enable(data->vddio_reg); > + if (ret) { > + dev_err(&client->dev, "failed to enable VDDIO regulator\n"); > + goto disable_regulator_vdd; > + } > + } else { > + ret = PTR_ERR(data->vddio_reg); > + if (ret != -ENODEV) > + goto disable_regulator_vdd; > + } > > ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); > if (ret < 0) > - return ret; > + goto disable_regulators; > > switch (ret) { > case MMA8451_DEVICE_ID: > @@ -1549,7 +1577,8 @@ static int mma8452_probe(struct i2c_client *client, > break; > /* else: fall through */ > default: > - return -ENODEV; > + ret = -ENODEV; > + goto disable_regulators; > } > > dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", > @@ -1566,13 +1595,13 @@ static int mma8452_probe(struct i2c_client *client, > > ret = mma8452_reset(client); > if (ret < 0) > - return ret; > + goto disable_regulators; > > data->data_cfg = MMA8452_DATA_CFG_FS_2G; > ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, > data->data_cfg); > if (ret < 0) > - return ret; > + goto disable_regulators; > > /* > * By default set transient threshold to max to avoid events if > @@ -1581,7 +1610,7 @@ static int mma8452_probe(struct i2c_client *client, > ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS, > MMA8452_TRANSIENT_THS_MASK); > if (ret < 0) > - return ret; > + goto disable_regulators; > > if (client->irq) { > int irq2; > @@ -1595,7 +1624,7 @@ static int mma8452_probe(struct i2c_client *client, > MMA8452_CTRL_REG5, > data->chip_info->all_events); > if (ret < 0) > - return ret; > + goto disable_regulators; > > dev_dbg(&client->dev, "using interrupt line INT1\n"); > } > @@ -1604,11 +1633,11 @@ static int mma8452_probe(struct i2c_client *client, > MMA8452_CTRL_REG4, > data->chip_info->enabled_events); > if (ret < 0) > - return ret; > + goto disable_regulators; > > ret = mma8452_trigger_setup(indio_dev); > if (ret < 0) > - return ret; > + goto disable_regulators; > } > > data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | > @@ -1661,12 +1690,22 @@ static int mma8452_probe(struct i2c_client *client, > trigger_cleanup: > mma8452_trigger_cleanup(indio_dev); > > +disable_regulators: > + if (!IS_ERR(data->vddio_reg)) > + regulator_disable(data->vddio_reg); > + > +disable_regulator_vdd: > + if (!IS_ERR(data->vdd_reg)) > + regulator_disable(data->vdd_reg); > + > return ret; > } > > static int mma8452_remove(struct i2c_client *client) > { > struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct mma8452_data *data = iio_priv(indio_dev); > + int ret; > > iio_device_unregister(indio_dev); > > @@ -1678,6 +1717,21 @@ static int mma8452_remove(struct i2c_client *client) > mma8452_trigger_cleanup(indio_dev); > mma8452_standby(iio_priv(indio_dev)); > > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_disable(data->vddio_reg); > + if (ret) { > + dev_err(&client->dev, "failed to disable VDDIO regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_disable(data->vdd_reg); > + if (ret) { > + dev_err(&client->dev, "failed to disable VDD regulator\n"); > + return ret; > + } > + } > + > return 0; > } > > @@ -1696,6 +1750,21 @@ static int mma8452_runtime_suspend(struct device *dev) > return -EAGAIN; > } > > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_disable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDDIO regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_disable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDD regulator\n"); > + return ret; > + } > + } > + > return 0; > } > > @@ -1705,6 +1774,23 @@ static int mma8452_runtime_resume(struct device *dev) > struct mma8452_data *data = iio_priv(indio_dev); > int ret, sleep_val; > > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_enable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDD regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_enable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDDIO regulator\n"); > + if (!IS_ERR(data->vdd_reg)) > + regulator_disable(data->vdd_reg); > + return ret; > + } > + } > + > ret = mma8452_active(data); > if (ret < 0) > return ret; > @@ -1723,14 +1809,94 @@ static int mma8452_runtime_resume(struct device *dev) > #ifdef CONFIG_PM_SLEEP > static int mma8452_suspend(struct device *dev) > { > - return mma8452_standby(iio_priv(i2c_get_clientdata( > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mma8452_data *data = iio_priv(indio_dev); > + int ret; > + > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_enable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDD regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_enable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDDIO regulator\n"); > + if (!IS_ERR(data->vdd_reg)) > + regulator_disable(data->vdd_reg); > + return ret; > + } > + } > + > + ret = mma8452_standby(iio_priv(i2c_get_clientdata( > to_i2c_client(dev)))); > + if (ret) > + return ret; > + > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_disable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDDIO regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_disable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDD regulator\n"); > + return ret; > + } > + } > + > + return 0; > } > > static int mma8452_resume(struct device *dev) > { > - return mma8452_active(iio_priv(i2c_get_clientdata( > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > + struct mma8452_data *data = iio_priv(indio_dev); > + int ret; > + > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_enable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDD regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_enable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to enable VDDIO regulator\n"); > + if (!IS_ERR(data->vdd_reg)) > + regulator_disable(data->vdd_reg); > + return ret; > + } > + } > + > + ret = mma8452_active(iio_priv(i2c_get_clientdata( > to_i2c_client(dev)))); > + if (ret) > + return ret; > + > + if (!IS_ERR(data->vddio_reg)) { > + ret = regulator_disable(data->vddio_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDDIO regulator\n"); > + return ret; > + } > + } > + if (!IS_ERR(data->vdd_reg)) { > + ret = regulator_disable(data->vdd_reg); > + if (ret) { > + dev_err(dev, "failed to disable VDD regulator\n"); > + return ret; > + } > + } > + > + return 0; > } > #endif >
On Sun, 16 Dec 2018 10:46:39 +0000 Jonathan Cameron <jic23@kernel.org> wrote: > On Tue, 11 Dec 2018 05:13:20 +0000 > Anson Huang <anson.huang@nxp.com> wrote: > > > The accelerometer's power supply could be controlled by regulator > > on some platforms, such as i.MX6Q-SABRESD board, the mma8451's > > power supply is controlled by a GPIO fixed regulator, need to make > > sure the regulator is enabled before any communication with mma8451, > > this patch adds optional vdd/vddio regulator operation support. > > > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> > > Acked-by: Martin Kepplinger <martink@posteo.de> > Applied to the togreg branch of iio.git and pushed out as testing > for the autobuilders to play with it. Sorry again for this. I was half asleep. This one isn't optional either, it just may not be controllable / queryable. So please use the non optional regulator request. If there is one specified it will wait for it to be available by deferring. If not then it'll just provide a stub regulator so that the rest of the code doesn't need to care. Patches dropped for now. Thanks, Jonathan > > Thanks, > > Jonathan > > > --- > > ChangeLog since V3: > > - add disabling vdd regulator in vddio error path; > > - improve regulator enable/disable sequence. > > --- > > drivers/iio/accel/mma8452.c | 186 +++++++++++++++++++++++++++++++++++++++++--- > > 1 file changed, 176 insertions(+), 10 deletions(-) > > > > diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c > > index 421a0a8..590a95d 100644 > > --- a/drivers/iio/accel/mma8452.c > > +++ b/drivers/iio/accel/mma8452.c > > @@ -31,6 +31,7 @@ > > #include <linux/of_device.h> > > #include <linux/of_irq.h> > > #include <linux/pm_runtime.h> > > +#include <linux/regulator/consumer.h> > > > > #define MMA8452_STATUS 0x00 > > #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) > > @@ -107,6 +108,8 @@ struct mma8452_data { > > u8 data_cfg; > > const struct mma_chip_info *chip_info; > > int sleep_val; > > + struct regulator *vdd_reg; > > + struct regulator *vddio_reg; > > }; > > > > /** > > @@ -1533,10 +1536,35 @@ static int mma8452_probe(struct i2c_client *client, > > data->client = client; > > mutex_init(&data->lock); > > data->chip_info = match->data; > > + data->vdd_reg = devm_regulator_get_optional(&client->dev, "vdd"); > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_enable(data->vdd_reg); > > + if (ret) { > > + dev_err(&client->dev, "failed to enable VDD regulator\n"); > > + return ret; > > + } > > + } else { > > + ret = PTR_ERR(data->vdd_reg); > > + if (ret != -ENODEV) > > + return ret; > > + } > > + > > + data->vddio_reg = devm_regulator_get_optional(&client->dev, "vddio"); > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_enable(data->vddio_reg); > > + if (ret) { > > + dev_err(&client->dev, "failed to enable VDDIO regulator\n"); > > + goto disable_regulator_vdd; > > + } > > + } else { > > + ret = PTR_ERR(data->vddio_reg); > > + if (ret != -ENODEV) > > + goto disable_regulator_vdd; > > + } > > > > ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > switch (ret) { > > case MMA8451_DEVICE_ID: > > @@ -1549,7 +1577,8 @@ static int mma8452_probe(struct i2c_client *client, > > break; > > /* else: fall through */ > > default: > > - return -ENODEV; > > + ret = -ENODEV; > > + goto disable_regulators; > > } > > > > dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", > > @@ -1566,13 +1595,13 @@ static int mma8452_probe(struct i2c_client *client, > > > > ret = mma8452_reset(client); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > data->data_cfg = MMA8452_DATA_CFG_FS_2G; > > ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, > > data->data_cfg); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > /* > > * By default set transient threshold to max to avoid events if > > @@ -1581,7 +1610,7 @@ static int mma8452_probe(struct i2c_client *client, > > ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS, > > MMA8452_TRANSIENT_THS_MASK); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > if (client->irq) { > > int irq2; > > @@ -1595,7 +1624,7 @@ static int mma8452_probe(struct i2c_client *client, > > MMA8452_CTRL_REG5, > > data->chip_info->all_events); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > dev_dbg(&client->dev, "using interrupt line INT1\n"); > > } > > @@ -1604,11 +1633,11 @@ static int mma8452_probe(struct i2c_client *client, > > MMA8452_CTRL_REG4, > > data->chip_info->enabled_events); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > > > ret = mma8452_trigger_setup(indio_dev); > > if (ret < 0) > > - return ret; > > + goto disable_regulators; > > } > > > > data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | > > @@ -1661,12 +1690,22 @@ static int mma8452_probe(struct i2c_client *client, > > trigger_cleanup: > > mma8452_trigger_cleanup(indio_dev); > > > > +disable_regulators: > > + if (!IS_ERR(data->vddio_reg)) > > + regulator_disable(data->vddio_reg); > > + > > +disable_regulator_vdd: > > + if (!IS_ERR(data->vdd_reg)) > > + regulator_disable(data->vdd_reg); > > + > > return ret; > > } > > > > static int mma8452_remove(struct i2c_client *client) > > { > > struct iio_dev *indio_dev = i2c_get_clientdata(client); > > + struct mma8452_data *data = iio_priv(indio_dev); > > + int ret; > > > > iio_device_unregister(indio_dev); > > > > @@ -1678,6 +1717,21 @@ static int mma8452_remove(struct i2c_client *client) > > mma8452_trigger_cleanup(indio_dev); > > mma8452_standby(iio_priv(indio_dev)); > > > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_disable(data->vddio_reg); > > + if (ret) { > > + dev_err(&client->dev, "failed to disable VDDIO regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_disable(data->vdd_reg); > > + if (ret) { > > + dev_err(&client->dev, "failed to disable VDD regulator\n"); > > + return ret; > > + } > > + } > > + > > return 0; > > } > > > > @@ -1696,6 +1750,21 @@ static int mma8452_runtime_suspend(struct device *dev) > > return -EAGAIN; > > } > > > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_disable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDDIO regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_disable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDD regulator\n"); > > + return ret; > > + } > > + } > > + > > return 0; > > } > > > > @@ -1705,6 +1774,23 @@ static int mma8452_runtime_resume(struct device *dev) > > struct mma8452_data *data = iio_priv(indio_dev); > > int ret, sleep_val; > > > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_enable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDD regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_enable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDDIO regulator\n"); > > + if (!IS_ERR(data->vdd_reg)) > > + regulator_disable(data->vdd_reg); > > + return ret; > > + } > > + } > > + > > ret = mma8452_active(data); > > if (ret < 0) > > return ret; > > @@ -1723,14 +1809,94 @@ static int mma8452_runtime_resume(struct device *dev) > > #ifdef CONFIG_PM_SLEEP > > static int mma8452_suspend(struct device *dev) > > { > > - return mma8452_standby(iio_priv(i2c_get_clientdata( > > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > > + struct mma8452_data *data = iio_priv(indio_dev); > > + int ret; > > + > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_enable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDD regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_enable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDDIO regulator\n"); > > + if (!IS_ERR(data->vdd_reg)) > > + regulator_disable(data->vdd_reg); > > + return ret; > > + } > > + } > > + > > + ret = mma8452_standby(iio_priv(i2c_get_clientdata( > > to_i2c_client(dev)))); > > + if (ret) > > + return ret; > > + > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_disable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDDIO regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_disable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDD regulator\n"); > > + return ret; > > + } > > + } > > + > > + return 0; > > } > > > > static int mma8452_resume(struct device *dev) > > { > > - return mma8452_active(iio_priv(i2c_get_clientdata( > > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); > > + struct mma8452_data *data = iio_priv(indio_dev); > > + int ret; > > + > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_enable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDD regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_enable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to enable VDDIO regulator\n"); > > + if (!IS_ERR(data->vdd_reg)) > > + regulator_disable(data->vdd_reg); > > + return ret; > > + } > > + } > > + > > + ret = mma8452_active(iio_priv(i2c_get_clientdata( > > to_i2c_client(dev)))); > > + if (ret) > > + return ret; > > + > > + if (!IS_ERR(data->vddio_reg)) { > > + ret = regulator_disable(data->vddio_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDDIO regulator\n"); > > + return ret; > > + } > > + } > > + if (!IS_ERR(data->vdd_reg)) { > > + ret = regulator_disable(data->vdd_reg); > > + if (ret) { > > + dev_err(dev, "failed to disable VDD regulator\n"); > > + return ret; > > + } > > + } > > + > > + return 0; > > } > > #endif > > >
diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt b/Documentation/devicetree/bindings/iio/accel/mma8452.txt index 2100e9a..e132394 100644 --- a/Documentation/devicetree/bindings/iio/accel/mma8452.txt +++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt @@ -20,6 +20,10 @@ Optional properties: - interrupt-names: should contain "INT1" and/or "INT2", the accelerometer's interrupt line in use. + - vdd-supply: phandle to the regulator that provides vdd power to the accelerometer. + + - vddio-supply: phandle to the regulator that provides vddio power to the accelerometer. + Example: mma8453fc@1d {
The accelerometer's power supply could be controlled by regulator on some platforms, add optional property "vdd/vddio" power supply to let device tree to pass phandles to the regulators to driver. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> --- Documentation/devicetree/bindings/iio/accel/mma8452.txt | 4 ++++ 1 file changed, 4 insertions(+)