linux-kernel - Re: [PATCH v2 3/3] iio: addac: ad74413r: correct comparator gpio getters mask usage

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Message-ID: <9d98ad20-617d-b57f-3b87-e001b6999fba@gmail.com>
Date:   Tue, 11 Jan 2022 09:29:15 +0200
From:   Cosmin Tanislav <demonsingur@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     "cosmin.tanislav@...log.com" <cosmin.tanislav@...log.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Rob Herring <robh+dt@...nel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] iio: addac: ad74413r: correct comparator gpio
 getters mask usage



On 1/11/22 01:14, Andy Shevchenko wrote:
> 
> 
> On Tuesday, January 11, 2022, Cosmin Tanislav <demonsingur@...il.com 
> <mailto: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.
> 
>     Fixes: fea251b6a5db ("iio: addac: add AD74413R driver")
>     Signed-off-by: Cosmin Tanislav <cosmin.tanislav@...log.com
>     <mailto:cosmin.tanislav@...log.com>>
>     ---
>     V1 -> V2
>       * add Fixes tag
>       * use __assign_bit
>       * remove bitmap_zero
>     ---
>       drivers/iio/addac/ad74413r.c | 7 ++-----
>       1 file changed, 2 insertions(+), 5 deletions(-)
> 
>     diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
>     index 3d089c0b6f7a..8a8d60e592a8 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;
>       }
>     @@ -336,9 +335,7 @@ static int ad74413r_gpio_get_multiple(struct
>     gpio_chip *chip,
> 
>              for_each_set_bit(offset, mask, chip->ngpio) {
>                      unsigned int real_offset =
>     st->comp_gpio_offsets[offset];
> 
>     -
> 
> 
> This blank line should be kept. Isn’t checkpatch complaining about?

Nope, doesn't seem to, even with the --strict option.

> 
>     -               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
> 
>