linux-kernel - Re: [PATCH v3 2/3] iio: addac: ad74413r: correct comparator gpio getters mask usage

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Date:   Tue, 11 Jan 2022 11:21:25 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Cosmin Tanislav <demonsingur@...il.com>
Cc:     cosmin.tanislav@...log.com, Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v3 2/3] iio: addac: ad74413r: correct comparator gpio
 getters mask usage

On Tue, Jan 11, 2022 at 9:47 AM Cosmin Tanislav <demonsingur@...il.com> wrote:
>
> The value of the GPIOs is currently altered using offsets rather
> than masks. Make use of __assign_bit and the BIT macro to turn
> the offsets into masks.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Fixes: fea251b6a5db ("iio: addac: add AD74413R driver")
> Signed-off-by: Cosmin Tanislav <cosmin.tanislav@...log.com>
> ---
> V1 -> V2
>  * add Fixes tag
>  * use __assign_bit
>  * remove bitmap_zero
>
> V2 -> V3
>  * add back line between real_offset declaration and __assign_bit call
>  * move before patch 2
> ---
>  drivers/iio/addac/ad74413r.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
> index 6ea3cd933d05..b13cd5407df3 100644
> --- a/drivers/iio/addac/ad74413r.c
> +++ b/drivers/iio/addac/ad74413r.c
> @@ -134,7 +134,6 @@ struct ad74413r_state {
>  #define AD74413R_CH_EN_MASK(x)         BIT(x)
>
>  #define AD74413R_REG_DIN_COMP_OUT              0x25
> -#define AD74413R_DIN_COMP_OUT_SHIFT_X(x)       x
>
>  #define AD74413R_REG_ADC_RESULT_X(x)   (0x26 + (x))
>  #define AD74413R_ADC_RESULT_MAX                GENMASK(15, 0)
> @@ -316,7 +315,7 @@ static int ad74413r_gpio_get(struct gpio_chip *chip, unsigned int offset)
>         if (ret)
>                 return ret;
>
> -       status &= AD74413R_DIN_COMP_OUT_SHIFT_X(real_offset);
> +       status &= BIT(real_offset);
>
>         return status ? 1 : 0;
>  }
> @@ -337,8 +336,7 @@ static int ad74413r_gpio_get_multiple(struct gpio_chip *chip,
>         for_each_set_bit_from(offset, mask, chip->ngpio) {
>                 unsigned int real_offset = st->comp_gpio_offsets[offset];
>
> -               if (val & BIT(real_offset))
> -                       *bits |= offset;
> +               __assign_bit(offset, bits, val & BIT(real_offset));
>         }
>
>         return ret;
> --
> 2.34.1
>


-- 
With Best Regards,
Andy Shevchenko