From 68c1b3dd5c48b2323067f8c1f0649ae2f31ab20b Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Thu, 7 Jul 2022 08:01:51 +0800 Subject: [PATCH] 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: Kai-Heng Feng Link: https://lore.kernel.org/r/20220707000151.33381-1-kai.heng.feng@canonical.com Signed-off-by: Jonathan Cameron --- drivers/iio/light/cm32181.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index 9764994..edbe6a3 100644 --- a/drivers/iio/light/cm32181.c +++ b/drivers/iio/light/cm32181.c @@ -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, }; -- 2.7.4