Re: [PATCH 2/3] pinctrl: renesas: rzg2l: Add support for configuring open-drain outputs

[Geert Uytterhoeven <geert@linux-m68k.org>]

Hi Prabhakar,

On Wed, Sep 18, 2024 at 2:09 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add support for configuring the multiplexed pins as open-drain outputs.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Thanks for your patch!

> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c

> @@ -1466,6 +1477,13 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
>                         rzg2l_rmw_pin_config(pctrl, IOLH(off), bit, IOLH_MASK, index);
>                         break;
>
> +               case PIN_CONFIG_DRIVE_OPEN_DRAIN:
> +                       if (!(cfg & PIN_CFG_NOD))
> +                               return -EINVAL;
> +
> +                       rzg2l_rmw_pin_config(pctrl, NOD(off), bit, NOD_MASK, 1);
> +                       break;
> +

I think you also need a case for PIN_CONFIG_DRIVE_PUSH_PULL,
so you can disable the NOD bit again.

>                 case RENESAS_RZV2H_PIN_CONFIG_OUTPUT_IMPEDANCE:
>                         if (!(cfg & PIN_CFG_IOLH_RZV2H))
>                                 return -EINVAL;

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds