iio: sx9500: add power management (7840ffee) · Commits · EulixOS / Software / Kernel

drivers/iio/proximity/sx9500.c

+47 −0

Original line number	Diff line number	Diff line
		@@ -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,