On Mon, 13 Sep 2021 14:51:21 +0300
Alexandru Ardelean <aardelean@xxxxxxxxxxx> wrote:
> For this conversion, the regulators need to have some cleanup hooks
> registered with devm_add_action_or_reset() and then the
> devm_io_device_register() call can be used.
>
> Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx>
Nice simple case.
Applied to the togreg branch of iio.git and pushed out as testing for 0-day
to see if it can find anything we missed.
Thanks,
Jonathan
> ---
> drivers/iio/dac/ad7303.c | 47 +++++++++++++++-------------------------
> 1 file changed, 17 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/iio/dac/ad7303.c b/drivers/iio/dac/ad7303.c
> index e1b6a92df12f..91eaaf793b3e 100644
> --- a/drivers/iio/dac/ad7303.c
> +++ b/drivers/iio/dac/ad7303.c
> @@ -198,6 +198,11 @@ static const struct iio_chan_spec ad7303_channels[] = {
> AD7303_CHANNEL(1),
> };
>
> +static void ad7303_reg_disable(void *reg)
> +{
> + regulator_disable(reg);
> +}
> +
> static int ad7303_probe(struct spi_device *spi)
> {
> const struct spi_device_id *id = spi_get_device_id(spi);
> @@ -210,7 +215,6 @@ static int ad7303_probe(struct spi_device *spi)
> return -ENOMEM;
>
> st = iio_priv(indio_dev);
> - spi_set_drvdata(spi, indio_dev);
>
> st->spi = spi;
>
> @@ -224,18 +228,27 @@ static int ad7303_probe(struct spi_device *spi)
> if (ret)
> return ret;
>
> + ret = devm_add_action_or_reset(&spi->dev, ad7303_reg_disable, st->vdd_reg);
> + if (ret)
> + return ret;
> +
> st->vref_reg = devm_regulator_get_optional(&spi->dev, "REF");
> if (IS_ERR(st->vref_reg)) {
> ret = PTR_ERR(st->vref_reg);
> if (ret != -ENODEV)
> - goto err_disable_vdd_reg;
> + return ret;
> st->vref_reg = NULL;
> }
>
> if (st->vref_reg) {
> ret = regulator_enable(st->vref_reg);
> if (ret)
> - goto err_disable_vdd_reg;
> + return ret;
> +
> + ret = devm_add_action_or_reset(&spi->dev, ad7303_reg_disable,
> + st->vref_reg);
> + if (ret)
> + return ret;
>
> st->config |= AD7303_CFG_EXTERNAL_VREF;
> }
> @@ -246,32 +259,7 @@ static int ad7303_probe(struct spi_device *spi)
> indio_dev->channels = ad7303_channels;
> indio_dev->num_channels = ARRAY_SIZE(ad7303_channels);
>
> - ret = iio_device_register(indio_dev);
> - if (ret)
> - goto err_disable_vref_reg;
> -
> - return 0;
> -
> -err_disable_vref_reg:
> - if (st->vref_reg)
> - regulator_disable(st->vref_reg);
> -err_disable_vdd_reg:
> - regulator_disable(st->vdd_reg);
> - return ret;
> -}
> -
> -static int ad7303_remove(struct spi_device *spi)
> -{
> - struct iio_dev *indio_dev = spi_get_drvdata(spi);
> - struct ad7303_state *st = iio_priv(indio_dev);
> -
> - iio_device_unregister(indio_dev);
> -
> - if (st->vref_reg)
> - regulator_disable(st->vref_reg);
> - regulator_disable(st->vdd_reg);
> -
> - return 0;
> + return devm_iio_device_register(&spi->dev, indio_dev);
> }
>
> static const struct of_device_id ad7303_spi_of_match[] = {
> @@ -292,7 +280,6 @@ static struct spi_driver ad7303_driver = {
> .of_match_table = ad7303_spi_of_match,
> },
> .probe = ad7303_probe,
> - .remove = ad7303_remove,
> .id_table = ad7303_spi_ids,
> };
> module_spi_driver(ad7303_driver);
