linux-kernel - Re: [linux-sunxi] [PATCH 1/8] iio: adc: axp20x_adc: put ADC rate setting in a per-variant function

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Date:   Tue, 5 Dec 2017 11:35:49 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Quentin Schulz <quentin.schulz@...e-electrons.com>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-iio@...r.kernel.org, Icenowy Zheng <icenowy@...c.io>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: Re: [linux-sunxi] [PATCH 1/8] iio: adc: axp20x_adc: put ADC rate
 setting in a per-variant function

On Mon, Dec 4, 2017 at 10:12 PM, Quentin Schulz
<quentin.schulz@...e-electrons.com> wrote:
> To prepare for a new comer that set a different register with different
> values, move rate setting in a function that is specific to each AXP
> variant.
>
> Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
> ---
>  drivers/iio/adc/axp20x_adc.c | 17 ++++++++++-------
>  1 file changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
> index a30a972..7274f4f 100644
> --- a/drivers/iio/adc/axp20x_adc.c
> +++ b/drivers/iio/adc/axp20x_adc.c
> @@ -470,14 +470,18 @@ static const struct iio_info axp22x_adc_iio_info = {
>         .read_raw = axp22x_read_raw,
>  };
>
> -static int axp20x_adc_rate(int rate)
> +static int axp20x_adc_rate(struct axp20x_adc_iio *info, int rate)
>  {
> -       return AXP20X_ADC_RATE_HZ(rate);
> +       return regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
> +                                 AXP20X_ADC_RATE_MASK,
> +                                 AXP20X_ADC_RATE_HZ(rate));
>  }
>
> -static int axp22x_adc_rate(int rate)
> +static int axp22x_adc_rate(struct axp20x_adc_iio *info, int rate)
>  {
> -       return AXP22X_ADC_RATE_HZ(rate);
> +       return regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
> +                                 AXP20X_ADC_RATE_MASK,
> +                                 AXP22X_ADC_RATE_HZ(rate));
>  }
>
>  struct axp_data {
> @@ -485,7 +489,7 @@ struct axp_data {
>         int                             num_channels;
>         struct iio_chan_spec const      *channels;
>         unsigned long                   adc_en1_mask;
> -       int                             (*adc_rate)(int rate);
> +       int                             (*adc_rate)(struct axp20x_adc_iio *info, int rate);

Could you also change the name of the callback, to say, adc_set_rate?
This would make it much clearer what the callback does. Previously
it was just a conversion helper.

ChenYu

>         bool                            adc_en2;
>         struct iio_map                  *maps;
>  };
> @@ -554,8 +558,7 @@ static int axp20x_probe(struct platform_device *pdev)
>                                    AXP20X_ADC_EN2_MASK, AXP20X_ADC_EN2_MASK);
>
>         /* Configure ADCs rate */
> -       regmap_update_bits(info->regmap, AXP20X_ADC_RATE, AXP20X_ADC_RATE_MASK,
> -                          info->data->adc_rate(100));
> +       info->data->adc_rate(info, 100);
>
>         ret = iio_map_array_register(indio_dev, info->data->maps);
>         if (ret < 0) {
> --
> git-series 0.9.1
>
> --
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