Re: [PATCH 4/4] pinctrl: sh-pfc: Use unsigned int for register/field widths and offsets

[Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>]

Hi Geert,

On Thursday 05 March 2015 10:34:18 Geert Uytterhoeven wrote:
> On Thu, Mar 5, 2015 at 10:20 AM, Laurent Pinchart wrote:
> >> @@ -228,12 +228,11 @@ static void sh_pfc_write_config_reg(struct sh_pfc
> >> *pfc,
> >>  }
> >> 
> >>  static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id,
> >> -                              const struct pinmux_cfg_reg **crp, int
> >> *fieldp,
> >> -                              u32 *valuep)
> >> +                              const struct pinmux_cfg_reg **crp,
> >> +                              unsigned int *fieldp, u32 *valuep)
> >>  {
> >>       const struct pinmux_cfg_reg *config_reg;
> >> -     unsigned long r_width, f_width, curr_width;
> >> -     unsigned int k, m, pos, bit_pos;
> >> +     unsigned int r_width, f_width, curr_width, k, m, pos, bit_pos;
> > 
> > I find declaring multiple variables per line quite difficult to read. I
> > know it's the current coding style in this driver, but I'd like to fix it
> > at some point. I would move to one variable per line as part of this
> > patch for the code that it touches. Alternatively could you at least not
> > make it worse (here and below) ? :-)
> 
> There are just too many variables ;-)

Well, if we need them, we need them :-)

> I usually declare variables in the order of appearance, but try to
> keep variables of the same type together.
> 
> Some declarations could move inside the while, e.g.
> 
>         while (1) {
>                 const struct pinmux_cfg_reg *config_reg =
> pfc->info->cfg_regs + k;
>                 unsigned int r_width = config_reg->reg_width;
>                 unsigned int f_width = config_reg->field_width;
>                 unsigned int pos = 0, m= 0;
> 
>                 if (!r_width)
>                         break;
> 
> Would you like that?

Yes, but please split pos and m on two different lines :-)

> >>       u32 ncomb, n;
> >>       
> >>       k = 0;
> >> @@ -300,9 +299,9 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned
> >> mark, int pinmux_type) const struct pinmux_cfg_reg *cr = NULL;
> >>       u16 enum_id;
> >>       const struct pinmux_range *range;
> >> -     int in_range, pos, field;
> >> +     int in_range, pos, ret;
> >> +     unsigned int field;
> >>       u32 value;
> >> -     int ret;

-- 
Regards,

Laurent Pinchart

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