linux-kernel - Re: [PATCH v5 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver

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Message-ID: <CAHp75Vd+m=1eaDY1JLvtNKbBPXsaTFmpewG=Vn+v-=+GMBCs2w@mail.gmail.com>
Date:   Sat, 28 Mar 2020 12:52:11 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Saravanan Sekar <sravanhome@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        Sebastian Reichel <sre@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v5 3/5] iio: adc: mp2629: Add support for mp2629 ADC driver

On Sat, Mar 28, 2020 at 2:12 AM Saravanan Sekar <sravanhome@...il.com> wrote:
>
> Add support for 8-bit resolution ADC readings for input power
> supply and battery charging measurement. Provides voltage, current
> readings to mp2629 power supply driver.

...

> +               ret = regmap_read(info->regmap, chan->address, &rval);
> +               if (ret < 0)

' < 0' is not needed for regmap call.

..

> +               case MP2629_INPUT_CURRENT:
> +                       *val = 133;
> +                       *val2 = 10;
> +                       return IIO_VAL_FRACTIONAL;
> +
> +               default:
> +                       return -EINVAL;
> +               }
> +
> +       default:
> +               return -EINVAL;
> +       }

> +
> +       return 0;

Do you really need this? Looks to me as dead code.

...

> +       indio_dev->name = dev_name(dev);

Shouldn't be this a part number?
I heard something, so, I might be mistaken, but I hope maintainers
will help here.

-- 
With Best Regards,
Andy Shevchenko