Commit c39a05e3 authored by David Heidelberg's avatar David Heidelberg Committed by Jonathan Cameron
Browse files

iio: light: al3320a implement suspend support 



AL3320a is fairly simple chip, so for suspend is enough to disable and
later enable it again.

Signed-off-by: default avatarDavid Heidelberg <david@ixit.cz>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent c36b5195

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,