iio: light: al3320a implement suspend support (c39a05e3) · Commits · 戴 / test

drivers/iio/light/al3320a.c

+25 −5

Original line number	Diff line number	Diff line
		@@ -7,6 +7,9 @@
		* IIO driver for AL3320A (7-bit I2C slave address 0x1C).
		*
		* TODO: interrupt support, thresholds
		* When the driver will get support for interrupt handling, then interrupt
		* will need to be disabled before turning sensor OFF in order to avoid
		* potential races with the interrupt handling.
		*/

		#include <linux/bitfield.h>
		@@ -78,13 +81,18 @@ static const struct attribute_group al3320a_attribute_group = {
		.attrs = al3320a_attributes,
		};

		static int al3320a_set_pwr(struct i2c_client *client, bool pwr)
		{
		u8 val = pwr ? AL3320A_CONFIG_ENABLE : AL3320A_CONFIG_DISABLE;
		return i2c_smbus_write_byte_data(client, AL3320A_REG_CONFIG, val);
		}

		static int al3320a_init(struct al3320a_data *data)
		{
		int ret;

		/* power on */
		ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_CONFIG,
		AL3320A_CONFIG_ENABLE);
		ret = al3320a_set_pwr(data->client, true);

		if (ret < 0)
		return ret;

		@@ -203,10 +211,21 @@ static int al3320a_probe(struct i2c_client *client,

		static int al3320a_remove(struct i2c_client *client)
		{
		return i2c_smbus_write_byte_data(client, AL3320A_REG_CONFIG,
		AL3320A_CONFIG_DISABLE);
		return al3320a_set_pwr(client, false);
		}

		static int __maybe_unused al3320a_suspend(struct device *dev)
		{
		return al3320a_set_pwr(to_i2c_client(dev), false);
		}

		static int __maybe_unused al3320a_resume(struct device *dev)
		{
		return al3320a_set_pwr(to_i2c_client(dev), true);
		}

		static SIMPLE_DEV_PM_OPS(al3320a_pm_ops, al3320a_suspend, al3320a_resume);

		static const struct i2c_device_id al3320a_id[] = {
		{"al3320a", 0},
		{}
		@@ -216,6 +235,7 @@ MODULE_DEVICE_TABLE(i2c, al3320a_id);
		static struct i2c_driver al3320a_driver = {
		.driver = {
		.name = AL3320A_DRV_NAME,
		.pm = &al3320a_pm_ops,
		},
		.probe = al3320a_probe,
		.remove = al3320a_remove,

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