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References: <20231207070700.4156557-1-claudiu.beznea.uj@bp.renesas.com> <20231207070700.4156557-6-claudiu.beznea.uj@bp.renesas.com>
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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Wed, 13 Dec 2023 14:46:38 +0100
Message-ID: <CAMuHMdUmFa8LZXqzFFy-WOspJA_ODs=zRtPAjQo+e5jxCd=6FQ@mail.gmail.com>
Subject: Re: [PATCH v2 05/11] pinctrl: renesas: rzg2l: Add support to select
 power source for Ethernet pins
To:     Claudiu <claudiu.beznea@tuxon.dev>
Cc:     s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com,
        kuba@kernel.org, pabeni@redhat.com, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        magnus.damm@gmail.com, mturquette@baylibre.com, sboyd@kernel.org,
        linus.walleij@linaro.org, prabhakar.mahadev-lad.rj@bp.renesas.com,
        biju.das.jz@bp.renesas.com, linux-renesas-soc@vger.kernel.org,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
        linux-gpio@vger.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
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On Thu, Dec 7, 2023 at 8:08 AM Claudiu <claudiu.beznea@tuxon.dev> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>
> The GPIO controller available on RZ/G3S (but also on RZ/G2L) allows setting
> the power source for Ethernet pins. Based on the interface b/w the Ethernet
> controller and the Ethernet PHY and board design specific power source need
> to be selected. The GPIO controller allows 1.8V, 2.5V and 3.3V power source
> selection for Ethernet pins. This could be selected though ETHX_POC
> registers (X={0, 1}).
>
> Commit adjust the driver to support this and does proper instantiation for
> RZ/G3S and RZ/G2L SoC. On RZ/G2L only get operation has been tested at the
> moment.
>
> While at it, as the power registers on RZ/G2L support access sizes of 8
> bits and RZ/G3S support access sizes of 8/16/32 bits, changed
> writel()/readl() on these registers with writeb()/readb(). This should
> allow using the same code for both SoCs w/o any issues.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
>
> Changes in v2:
> - removed PVDD_MASK
> - use 8 bit helpers to get/set value of power register
> - replaced if/else with switch/case everywhere

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-pinctrl-for-v6.8.

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