On Mon, 13 Sep 2021 14:52:09 +0300
Alexandru Ardelean <aardelean@xxxxxxxxxxx> wrote:
> This change does a conversion of the driver to use device-managed init
> functions. The 2 regulators and the clock inits are converted to use
> devm_add_action_or_reset() callbacks for de-initializing them when the
> driver unloads.
>
> And finally the devm_iio_device_register() function can be use to register
> the device.
>
> The remove hook can finally be removed and the spi_set_drvdata() call can
> also be removed as the private data is no longer used.
>
> Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx>
Applied to the togreg branch of iio.git and pushed out as testing.
Thanks,
Jonathan
> ---
> drivers/staging/iio/frequency/ad9832.c | 82 +++++++++++---------------
> 1 file changed, 36 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
> index 3f1981e287f5..f43464db618a 100644
> --- a/drivers/staging/iio/frequency/ad9832.c
> +++ b/drivers/staging/iio/frequency/ad9832.c
> @@ -294,6 +294,16 @@ static const struct iio_info ad9832_info = {
> .attrs = &ad9832_attribute_group,
> };
>
> +static void ad9832_reg_disable(void *reg)
> +{
> + regulator_disable(reg);
> +}
> +
> +static void ad9832_clk_disable(void *clk)
> +{
> + clk_disable_unprepare(clk);
> +}
> +
> static int ad9832_probe(struct spi_device *spi)
> {
> struct ad9832_platform_data *pdata = dev_get_platdata(&spi->dev);
> @@ -310,7 +320,6 @@ static int ad9832_probe(struct spi_device *spi)
> if (!indio_dev)
> return -ENOMEM;
>
> - spi_set_drvdata(spi, indio_dev);
> st = iio_priv(indio_dev);
>
> st->avdd = devm_regulator_get(&spi->dev, "avdd");
> @@ -323,27 +332,35 @@ static int ad9832_probe(struct spi_device *spi)
> return ret;
> }
>
> + ret = devm_add_action_or_reset(&spi->dev, ad9832_reg_disable, st->avdd);
> + if (ret)
> + return ret;
> +
> st->dvdd = devm_regulator_get(&spi->dev, "dvdd");
> - if (IS_ERR(st->dvdd)) {
> - ret = PTR_ERR(st->dvdd);
> - goto error_disable_avdd;
> - }
> + if (IS_ERR(st->dvdd))
> + return PTR_ERR(st->dvdd);
>
> ret = regulator_enable(st->dvdd);
> if (ret) {
> dev_err(&spi->dev, "Failed to enable specified DVDD supply\n");
> - goto error_disable_avdd;
> + return ret;
> }
>
> + ret = devm_add_action_or_reset(&spi->dev, ad9832_reg_disable, st->dvdd);
> + if (ret)
> + return ret;
> +
> st->mclk = devm_clk_get(&spi->dev, "mclk");
> - if (IS_ERR(st->mclk)) {
> - ret = PTR_ERR(st->mclk);
> - goto error_disable_dvdd;
> - }
> + if (IS_ERR(st->mclk))
> + return PTR_ERR(st->mclk);
>
> ret = clk_prepare_enable(st->mclk);
> if (ret < 0)
> - goto error_disable_dvdd;
> + return ret;
> +
> + ret = devm_add_action_or_reset(&spi->dev, ad9832_clk_disable, st->mclk);
> + if (ret)
> + return ret;
>
> st->spi = spi;
> mutex_init(&st->lock);
> @@ -394,60 +411,34 @@ static int ad9832_probe(struct spi_device *spi)
> ret = spi_sync(st->spi, &st->msg);
> if (ret) {
> dev_err(&spi->dev, "device init failed\n");
> - goto error_unprepare_mclk;
> + return ret;
> }
>
> ret = ad9832_write_frequency(st, AD9832_FREQ0HM, pdata->freq0);
> if (ret)
> - goto error_unprepare_mclk;
> + return ret;
>
> ret = ad9832_write_frequency(st, AD9832_FREQ1HM, pdata->freq1);
> if (ret)
> - goto error_unprepare_mclk;
> + return ret;
>
> ret = ad9832_write_phase(st, AD9832_PHASE0H, pdata->phase0);
> if (ret)
> - goto error_unprepare_mclk;
> + return ret;
>
> ret = ad9832_write_phase(st, AD9832_PHASE1H, pdata->phase1);
> if (ret)
> - goto error_unprepare_mclk;
> + return ret;
>
> ret = ad9832_write_phase(st, AD9832_PHASE2H, pdata->phase2);
> if (ret)
> - goto error_unprepare_mclk;
> + return ret;
>
> ret = ad9832_write_phase(st, AD9832_PHASE3H, pdata->phase3);
> if (ret)
> - goto error_unprepare_mclk;
> -
> - ret = iio_device_register(indio_dev);
> - if (ret)
> - goto error_unprepare_mclk;
> -
> - return 0;
> -
> -error_unprepare_mclk:
> - clk_disable_unprepare(st->mclk);
> -error_disable_dvdd:
> - regulator_disable(st->dvdd);
> -error_disable_avdd:
> - regulator_disable(st->avdd);
> -
> - return ret;
> -}
> -
> -static int ad9832_remove(struct spi_device *spi)
> -{
> - struct iio_dev *indio_dev = spi_get_drvdata(spi);
> - struct ad9832_state *st = iio_priv(indio_dev);
> -
> - iio_device_unregister(indio_dev);
> - clk_disable_unprepare(st->mclk);
> - regulator_disable(st->dvdd);
> - regulator_disable(st->avdd);
> + return ret;
>
> - return 0;
> + return devm_iio_device_register(&spi->dev, indio_dev);
> }
>
> static const struct spi_device_id ad9832_id[] = {
> @@ -462,7 +453,6 @@ static struct spi_driver ad9832_driver = {
> .name = "ad9832",
> },
> .probe = ad9832_probe,
> - .remove = ad9832_remove,
> .id_table = ad9832_id,
> };
> module_spi_driver(ad9832_driver);
