linux-kernel - Re: [PATCH v2 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for reading/writing OEN register

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Date: Wed, 22 May 2024 14:44:00 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Magnus Damm <magnus.damm@...il.com>, linux-renesas-soc@...r.kernel.org, 
	linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function
 pointers for reading/writing OEN register

Hi Prabhakar,

On Tue, Apr 23, 2024 at 7:59 PM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> This patch introduces function pointers, read_oen() and write_oen(), in the
> struct rzg2l_pinctrl_data to facilitate reading and writing to the PFC_OEN
> register. On the RZ/V2H(P) SoC, unlocking the PWPR.REGWE_B bit before
> writing to the PFC_OEN register is necessary, and the PFC_OEN register has
> more bits compared to the RZ/G2L family. To handle these differences
> between RZ/G2L and RZ/V2H(P) and to reuse the existing code for RZ/V2H(P),
> these function pointers are introduced.
>
> Additionally, this patch populates these function pointers with appropriate
> data for existing SoCs.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> RFC->v2
> - No change

Thanks for the update!

> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -261,6 +261,8 @@ struct rzg2l_pinctrl_data {
>         void (*pwpr_pfc_unlock)(struct rzg2l_pinctrl *pctrl);
>         void (*pwpr_pfc_lock)(struct rzg2l_pinctrl *pctrl);
>         void (*pmc_writeb)(struct rzg2l_pinctrl *pctrl, u8 val, void __iomem *addr);
> +       u32 (*read_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin);
> +       int (*write_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin, u8 oen);

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

The rest LGTM.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

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