On Thu, 24 Jun 2021 11:05:34 +0300
Alexandru Ardelean <aardelean@xxxxxxxxxxx> wrote:
> This change converts the driver to use only device-managed init routines in
> the probe function of the driver.
>
> This way, we no longer need the tcs3414_remove() hook.
> We still need to keep the i2c_set_clientdata() call, as that's being used
> for the PM routines.
>
> And lastly, a devm_add_action_or_reset() hook is added to call the
> powerdown handler when the chip is uninitialized or the probe fails.
>
> Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx>
Applied
> ---
> drivers/iio/light/tcs3414.c | 48 +++++++++++++++----------------------
> 1 file changed, 19 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
> index 0593abd600ec..b87222141429 100644
> --- a/drivers/iio/light/tcs3414.c
> +++ b/drivers/iio/light/tcs3414.c
> @@ -267,6 +267,18 @@ static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = {
> .predisable = tcs3414_buffer_predisable,
> };
>
> +static int tcs3414_powerdown(struct tcs3414_data *data)
> +{
> + return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> + data->control & ~(TCS3414_CONTROL_POWER |
> + TCS3414_CONTROL_ADC_EN));
> +}
> +
> +static void tcs3414_powerdown_cleanup(void *data)
> +{
> + tcs3414_powerdown(data);
> +}
> +
> static int tcs3414_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -309,6 +321,11 @@ static int tcs3414_probe(struct i2c_client *client,
> if (ret < 0)
> return ret;
>
> + ret = devm_add_action_or_reset(&client->dev, tcs3414_powerdown_cleanup,
> + data);
> + if (ret < 0)
> + return ret;
> +
> data->timing = TCS3414_INTEG_12MS; /* free running */
> ret = i2c_smbus_write_byte_data(data->client, TCS3414_TIMING,
> data->timing);
> @@ -320,38 +337,12 @@ static int tcs3414_probe(struct i2c_client *client,
> return ret;
> data->gain = ret;
>
> - ret = iio_triggered_buffer_setup(indio_dev, NULL,
> + ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
> tcs3414_trigger_handler, &tcs3414_buffer_setup_ops);
> if (ret < 0)
> return ret;
>
> - ret = iio_device_register(indio_dev);
> - if (ret < 0)
> - goto buffer_cleanup;
> -
> - return 0;
> -
> -buffer_cleanup:
> - iio_triggered_buffer_cleanup(indio_dev);
> - return ret;
> -}
> -
> -static int tcs3414_powerdown(struct tcs3414_data *data)
> -{
> - return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> - data->control & ~(TCS3414_CONTROL_POWER |
> - TCS3414_CONTROL_ADC_EN));
> -}
> -
> -static int tcs3414_remove(struct i2c_client *client)
> -{
> - struct iio_dev *indio_dev = i2c_get_clientdata(client);
> -
> - iio_device_unregister(indio_dev);
> - iio_triggered_buffer_cleanup(indio_dev);
> - tcs3414_powerdown(iio_priv(indio_dev));
> -
> - return 0;
> + return devm_iio_device_register(&client->dev, indio_dev);
> }
>
> #ifdef CONFIG_PM_SLEEP
> @@ -385,7 +376,6 @@ static struct i2c_driver tcs3414_driver = {
> .pm = &tcs3414_pm_ops,
> },
> .probe = tcs3414_probe,
> - .remove = tcs3414_remove,
> .id_table = tcs3414_id,
> };
> module_i2c_driver(tcs3414_driver);
