diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2022-07-07 08:01:51 +0800 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-07-07 17:50:04 +0100 |
| commit | 68c1b3dd5c48b2323067f8c1f0649ae2f31ab20b (patch) | |
| tree | 99a3ed8c1b19450c914a762fec5b72fe50d59f47 | |
| parent | bca036de0ab2c317902d4fa1dd9900f238b03e1f (diff) | |
| download | lwn-68c1b3dd5c48b2323067f8c1f0649ae2f31ab20b.tar.gz lwn-68c1b3dd5c48b2323067f8c1f0649ae2f31ab20b.zip | |
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 <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20220707000151.33381-1-kai.heng.feng@canonical.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/light/cm32181.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index 97649944f1df..edbe6a3138d0 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, }; |