linux-kernel - Re: [PATCH] iio: light: as73211: Fix AS73211_CREG1_GAIN

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Message-ID: <CAHp75VfBMXPyH80d0hrUqohC4wvgBNSSNp4N86JcfiWSfWHs+w@mail.gmail.com>
Date:   Wed, 26 Aug 2020 19:11:37 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Christian Eggers <ceggers@...i.de>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iio: light: as73211: Fix AS73211_CREG1_GAIN_1

On Wed, Aug 26, 2020 at 12:55 PM Christian Eggers <ceggers@...i.de> wrote:
>
> Wrong value was introduced during review process.

Ooops, long reviews have their outcomes...

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

> Signed-off-by: Christian Eggers <ceggers@...i.de>
> ---
> Patch against jic23/iio.git, branch testing
>
>  drivers/iio/light/as73211.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iio/light/as73211.c b/drivers/iio/light/as73211.c
> index 3383aaacbf52..e76747b99b92 100644
> --- a/drivers/iio/light/as73211.c
> +++ b/drivers/iio/light/as73211.c
> @@ -56,7 +56,7 @@
>  #define AS73211_AGEN_MUT(x)       FIELD_PREP(AS73211_AGEN_MUT_MASK, (x))
>
>  #define AS73211_CREG1_GAIN_MASK   GENMASK(7, 4)
> -#define AS73211_CREG1_GAIN_1      13
> +#define AS73211_CREG1_GAIN_1      11
>  #define AS73211_CREG1_TIME_MASK   GENMASK(3, 0)
>
>  #define AS73211_CREG3_CCLK_MASK   GENMASK(1, 0)
> @@ -217,7 +217,7 @@ static void as73211_integration_time_calc_avail(struct as73211_data *data)
>
>  static unsigned int as73211_gain(struct as73211_data *data)
>  {
> -       /* gain can be calculated from CREG1 as 2^(13 - CREG1_GAIN) */
> +       /* gain can be calculated from CREG1 as 2^(11 - CREG1_GAIN) */
>         return BIT(AS73211_CREG1_GAIN_1 - FIELD_GET(AS73211_CREG1_GAIN_MASK, data->creg1));
>  }
>
> @@ -473,7 +473,7 @@ static int _as73211_write_raw(struct iio_dev *indio_dev,
>                 if (val < 0 || !is_power_of_2(val) || val2)
>                         return -EINVAL;
>
> -               /* gain can be calculated from CREG1 as 2^(13 - CREG1_GAIN) */
> +               /* gain can be calculated from CREG1 as 2^(11 - CREG1_GAIN) */
>                 reg_bits = AS73211_CREG1_GAIN_1 - ilog2(val);
>                 if (!FIELD_FIT(AS73211_CREG1_GAIN_MASK, reg_bits))
>                         return -EINVAL;
> --
> Christian Eggers
> Embedded software developer
>
> Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
> Sitz: Muenchen - Registergericht: Amtsgericht Muenchen - Handelsregisternummer: HRA 57918
> Persoenlich haftender Gesellschafter: Arnold & Richter Cine Technik GmbH
> Sitz: Muenchen - Registergericht: Amtsgericht Muenchen - Handelsregisternummer: HRB 54477
> Geschaeftsfuehrer: Dr. Michael Neuhaeuser; Stephan Schenk; Walter Trauninger; Markus Zeiler
>


-- 
With Best Regards,
Andy Shevchenko