On Thu, 7 Jul 2022 08:01:51 +0800
Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> wrote:
> 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@xxxxxxxxxxxxx>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to poke at it and see if we missed anything,
Thanks,
Jonathan
> ---
> v2:
> - Use dev_get_drvdata() instead of i2c_get_clientdata() to avoid extra
> dereference.
>
> 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 97649944f1df6..edbe6a3138d0b 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,
> };
