diff options
| author | Vlad Dogaru <vlad.dogaru@intel.com> | 2015-04-03 15:47:29 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-04-09 17:12:59 +0100 |
| commit | 7840ffee97842132f6a7f170ca609764551f7de2 (patch) | |
| tree | b54f3743ef763e5b7a92ddb64148200ed0eb8d81 /drivers/iio/proximity | |
| parent | abda2b4f21249a079b83ed3356937fa6d9faa789 (diff) | |
iio: sx9500: add power management
Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/proximity')
| -rw-r--r-- | drivers/iio/proximity/sx9500.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c index fa40f6d0ca39..d2c52f9da937 100644 --- a/drivers/iio/proximity/sx9500.c +++ b/drivers/iio/proximity/sx9500.c @@ -18,6 +18,7 @@ #include <linux/acpi.h> #include <linux/gpio/consumer.h> #include <linux/regmap.h> +#include <linux/pm.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> @@ -89,6 +90,8 @@ struct sx9500_data { bool event_enabled[SX9500_NUM_CHANNELS]; bool trigger_enabled; u16 *buffer; + /* Remember enabled channels and sample rate during suspend. */ + unsigned int suspend_ctrl0; }; static const struct iio_event_spec sx9500_events[] = { @@ -720,6 +723,49 @@ static int sx9500_remove(struct i2c_client *client) return 0; } +#ifdef CONFIG_PM_SLEEP +static int sx9500_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct sx9500_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = regmap_read(data->regmap, SX9500_REG_PROX_CTRL0, + &data->suspend_ctrl0); + if (ret < 0) + goto out; + + /* + * Scan period doesn't matter because when all the sensors are + * deactivated the device is in sleep mode. + */ + ret = regmap_write(data->regmap, SX9500_REG_PROX_CTRL0, 0); + +out: + mutex_unlock(&data->mutex); + return ret; +} + +static int sx9500_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct sx9500_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = regmap_write(data->regmap, SX9500_REG_PROX_CTRL0, + data->suspend_ctrl0); + mutex_unlock(&data->mutex); + + return ret; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops sx9500_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(sx9500_suspend, sx9500_resume) +}; + static const struct acpi_device_id sx9500_acpi_match[] = { {"SSX9500", 0}, { }, @@ -736,6 +782,7 @@ static struct i2c_driver sx9500_driver = { .driver = { .name = SX9500_DRIVER_NAME, .acpi_match_table = ACPI_PTR(sx9500_acpi_match), + .pm = &sx9500_pm_ops, }, .probe = sx9500_probe, .remove = sx9500_remove, |