linux-kernel - Re: [PATCH 1/2] regulator: ltc3676: Simplify .readable_reg and .writable

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Date:   Fri, 15 Feb 2019 08:20:48 -0800
From:   Tim Harvey <tharvey@...eworks.com>
To:     Axel Lin <axel.lin@...ics.com>
Cc:     Mark Brown <broonie@...nel.org>, Marek Vasut <marex@...x.de>,
        Liam Girdwood <lgirdwood@...il.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] regulator: ltc3676: Simplify .readable_reg and
 .writable_reg callbacks

On Fri, Feb 15, 2019 at 3:54 AM Axel Lin <axel.lin@...ics.com> wrote:
>
> Use case range for continuous range to make the code shorter.
> The .readable_reg and .writable_reg implementation are exactly the same,
> so use a common ltc3676_readable_writeable_reg function instead.
>
> Signed-off-by: Axel Lin <axel.lin@...ics.com>
> ---
>  drivers/regulator/ltc3676.c | 63 +++----------------------------------
>  1 file changed, 5 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/regulator/ltc3676.c b/drivers/regulator/ltc3676.c
> index 71fd0f2a4b76..549a1a243870 100644
> --- a/drivers/regulator/ltc3676.c
> +++ b/drivers/regulator/ltc3676.c
> @@ -241,61 +241,10 @@ static struct regulator_desc ltc3676_regulators[LTC3676_NUM_REGULATORS] = {
>         LTC3676_FIXED_REG(LDO4, ldo4, LDOB, 2),
>  };
>
> -static bool ltc3676_writeable_reg(struct device *dev, unsigned int reg)
> +static bool ltc3676_readable_writeable_reg(struct device *dev, unsigned int reg)
>  {
>         switch (reg) {
> -       case LTC3676_IRQSTAT:
> -       case LTC3676_BUCK1:
> -       case LTC3676_BUCK2:
> -       case LTC3676_BUCK3:
> -       case LTC3676_BUCK4:
> -       case LTC3676_LDOA:
> -       case LTC3676_LDOB:
> -       case LTC3676_SQD1:
> -       case LTC3676_SQD2:
> -       case LTC3676_CNTRL:
> -       case LTC3676_DVB1A:
> -       case LTC3676_DVB1B:
> -       case LTC3676_DVB2A:
> -       case LTC3676_DVB2B:
> -       case LTC3676_DVB3A:
> -       case LTC3676_DVB3B:
> -       case LTC3676_DVB4A:
> -       case LTC3676_DVB4B:
> -       case LTC3676_MSKIRQ:
> -       case LTC3676_MSKPG:
> -       case LTC3676_USER:
> -       case LTC3676_HRST:
> -       case LTC3676_CLIRQ:
> -               return true;
> -       }
> -       return false;
> -}
> -
> -static bool ltc3676_readable_reg(struct device *dev, unsigned int reg)
> -{
> -       switch (reg) {
> -       case LTC3676_IRQSTAT:
> -       case LTC3676_BUCK1:
> -       case LTC3676_BUCK2:
> -       case LTC3676_BUCK3:
> -       case LTC3676_BUCK4:
> -       case LTC3676_LDOA:
> -       case LTC3676_LDOB:
> -       case LTC3676_SQD1:
> -       case LTC3676_SQD2:
> -       case LTC3676_CNTRL:
> -       case LTC3676_DVB1A:
> -       case LTC3676_DVB1B:
> -       case LTC3676_DVB2A:
> -       case LTC3676_DVB2B:
> -       case LTC3676_DVB3A:
> -       case LTC3676_DVB3B:
> -       case LTC3676_DVB4A:
> -       case LTC3676_DVB4B:
> -       case LTC3676_MSKIRQ:
> -       case LTC3676_MSKPG:
> -       case LTC3676_USER:
> +       case LTC3676_BUCK1 ... LTC3676_IRQSTAT:
>         case LTC3676_HRST:
>         case LTC3676_CLIRQ:
>                 return true;
> @@ -306,9 +255,7 @@ static bool ltc3676_readable_reg(struct device *dev, unsigned int reg)
>  static bool ltc3676_volatile_reg(struct device *dev, unsigned int reg)
>  {
>         switch (reg) {
> -       case LTC3676_IRQSTAT:
> -       case LTC3676_PGSTATL:
> -       case LTC3676_PGSTATRT:
> +       case LTC3676_IRQSTAT ... LTC3676_PGSTATRT:
>                 return true;
>         }
>         return false;
> @@ -317,8 +264,8 @@ static bool ltc3676_volatile_reg(struct device *dev, unsigned int reg)
>  static const struct regmap_config ltc3676_regmap_config = {
>         .reg_bits = 8,
>         .val_bits = 8,
> -       .writeable_reg = ltc3676_writeable_reg,
> -       .readable_reg = ltc3676_readable_reg,
> +       .writeable_reg = ltc3676_readable_writeable_reg,
> +       .readable_reg = ltc3676_readable_writeable_reg,
>         .volatile_reg = ltc3676_volatile_reg,
>         .max_register = LTC3676_CLIRQ,
>         .use_single_read = true,
> --
> 2.17.1
>

Acked-by: Tim Harvey <tharvey@...eworks.com>

Tim