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References: <20240423175900.702640-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20240423175900.702640-11-prabhakar.mahadev-lad.rj@bp.renesas.com>
In-Reply-To: <20240423175900.702640-11-prabhakar.mahadev-lad.rj@bp.renesas.com>
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Wed, 22 May 2024 15:26:02 +0200
Message-ID: <CAMuHMdWS8TNVjd6UBYe1X7p=aVVFBBErh8StL1urJL7w_WYLzA@mail.gmail.com>
Subject: Re: [PATCH v2 10/13] pinctrl: renesas: pinctrl-rzg2l: Add support to
 set pulling up/down the pins
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>, Rob Herring <robh@kernel.org>, 
	Krzysztof Kozlowski <krzk+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org>, 
	Magnus Damm <magnus.damm@gmail.com>, linux-renesas-soc@vger.kernel.org, 
	linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, 
	linux-kernel@vger.kernel.org, Biju Das <biju.das.jz@bp.renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@renesas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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On Tue, Apr 23, 2024 at 7:59=E2=80=AFPM Prabhakar <prabhakar.csengg@gmail.c=
om> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add support to configure bias-disable, bias-pull-up and bias-pull-down
> properties of the pin.
>
> Two new function pointers get_bias_param() and get_bias_val() are
> introduced as the values in PUPD register differ when compared to
> RZ/G2L family and RZ/V2H(P) SoC,
>
> Value | RZ/G2L        | RZ/V2H
> ---------------------------------
> 00b:  | Bias Disabled | Pull up/down disabled
> 01b:  | Pull-up       | Pull up/down disabled
> 10b:  | Pull-down     | Pull-down
> 11b:  | Prohibited    | Pull-up
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
> RFC->v2
> - New patch
> ---
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 73 +++++++++++++++++++++++++
>  1 file changed, 73 insertions(+)
>
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/re=
nesas/pinctrl-rzg2l.c
> index 102fa75c71d3..c144bf43522b 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -122,6 +122,7 @@
>  #define IOLH(off)              (0x1000 + (off) * 8)
>  #define SR(off)                        (0x1400 + (off) * 8)
>  #define IEN(off)               (0x1800 + (off) * 8)
> +#define PUPD(off)              (0x1C00 + (off) * 8)
>  #define ISEL(off)              (0x2C00 + (off) * 8)
>  #define SD_CH(off, ch)         ((off) + (ch) * 4)
>  #define ETH_POC(off, ch)       ((off) + (ch) * 4)
> @@ -140,6 +141,7 @@
>  #define IEN_MASK               0x01
>  #define IOLH_MASK              0x03
>  #define SR_MASK                        0x01
> +#define PUPD_MASK              0x03
>
>  #define PM_INPUT               0x1
>  #define PM_OUTPUT              0x2
> @@ -265,6 +267,8 @@ struct rzg2l_pinctrl_data {
>         void (*pmc_writeb)(struct rzg2l_pinctrl *pctrl, u8 val, void __io=
mem *addr);
>         u32 (*read_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset=
, u8 pin);
>         int (*write_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offse=
t, u8 pin, u8 oen);
> +       int (*get_bias_param)(u8 val);
> +       int (*get_bias_val)(enum pin_config_param param);

Please use consistent naming: "pmc_writeb" uses <noun>_<verb> ordering,
"get_bias_pararm" uses <verb>_<noun> ordering.

Perhaps "hw_to_bias_param()" and "bias_param_to_hw()?"

Gr{oetje,eeting}s,

                        Geert

--=20
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k=
org

In personal conversations with technical people, I call myself a hacker. Bu=
t
when I'm talking to journalists I just say "programmer" or something like t=
hat.
                                -- Linus Torvalds