Commit 68c1b3dd authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Jonathan Cameron
Browse files

iio: light: cm32181: Add PM support 



The read on in_illuminance_input keeps at 0 after system sleep.

So add proper suspend and resume callback to make the sensor keep
working after system sleep.

Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20220707000151.33381-1-kai.heng.feng@canonical.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent bca036de

drivers/iio/light/cm32181.c

+22 −0
Original line number Diff line number Diff line
@@ -460,6 +460,8 @@ static int cm32181_probe(struct i2c_client *client) 
			return PTR_ERR(client);

	}



	i2c_set_clientdata(client, indio_dev);



	cm32181 = iio_priv(indio_dev);

	cm32181->client = client;

	cm32181->dev = dev;
@@ -486,6 +488,25 @@ static int cm32181_probe(struct i2c_client *client) 
	return 0;

}



static int cm32181_suspend(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);



	return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,

					 CM32181_CMD_ALS_DISABLE);

}



static int cm32181_resume(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct cm32181_chip *cm32181 = iio_priv(dev_get_drvdata(dev));



	return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,

					 cm32181->conf_regs[CM32181_REG_ADDR_CMD]);

}



DEFINE_SIMPLE_DEV_PM_OPS(cm32181_pm_ops, cm32181_suspend, cm32181_resume);



static const struct of_device_id cm32181_of_match[] = {

	{ .compatible = "capella,cm3218" },

	{ .compatible = "capella,cm32181" },
@@ -506,6 +527,7 @@ static struct i2c_driver cm32181_driver = { 
		.name	= "cm32181",

		.acpi_match_table = ACPI_PTR(cm32181_acpi_match),

		.of_match_table = cm32181_of_match,

		.pm = pm_sleep_ptr(&cm32181_pm_ops),

	},

	.probe_new	= cm32181_probe,

};