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:   Sun, 10 Dec 2017 16:37:41 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Quentin Schulz <quentin.schulz@...e-electrons.com>,
        Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        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 Tue, 5 Dec 2017 11:35:49 +0800
Chen-Yu Tsai <wens@...e.org> wrote:

> 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.
> 
Agreed.

With that change you can add my
Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Thanks,

Jonathan

> 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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