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iio: sx9500: add power management

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Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Vlad Dogaru 2015-04-03 15:47:29 +03:00 committed by Jonathan Cameron
parent abda2b4f21
commit 7840ffee97
1 changed files with 47 additions and 0 deletions
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47
drivers/iio/proximity/sx9500.c
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@ -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,