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Message-ID: <abbf8d0b-b766-4734-b4e9-a963e1dc8810@tuxon.dev>
Date:   Mon, 4 Dec 2023 09:34:16 +0200
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Subject: Re: [PATCH 04/14] clk: renesas: r9a08g045-cpg: Add clock and reset
 support for ETH0 and ETH1
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To:     Geert Uytterhoeven <geert@linux-m68k.org>
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,
        linux@armlinux.org.uk, magnus.damm@gmail.com,
        mturquette@baylibre.com, sboyd@kernel.org,
        linus.walleij@linaro.org, p.zabel@pengutronix.de, arnd@arndb.de,
        m.szyprowski@samsung.com, alexandre.torgue@foss.st.com, afd@ti.com,
        broonie@kernel.org, alexander.stein@ew.tq-group.com,
        eugen.hristev@collabora.com, sergei.shtylyov@gmail.com,
        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-arm-kernel@lists.infradead.org,
        linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
References: <20231120070024.4079344-1-claudiu.beznea.uj@bp.renesas.com>
 <20231120070024.4079344-5-claudiu.beznea.uj@bp.renesas.com>
 <CAMuHMdWwn8xcKX3vgawtGqksuMM3CKZx=3k6EKP3kDFZxbocdA@mail.gmail.com>
From:   claudiu beznea <claudiu.beznea@tuxon.dev>
In-Reply-To: <CAMuHMdWwn8xcKX3vgawtGqksuMM3CKZx=3k6EKP3kDFZxbocdA@mail.gmail.com>
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Hi, Geert,

On 01.12.2023 17:59, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Mon, Nov 20, 2023 at 8:01 AM Claudiu <claudiu.beznea@tuxon.dev> wrote:
>> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>
>> RZ/G3S has 2 Gigabit Ethernet interfaces available. Add clock and reset
>> support for both of them.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> Thanks for your patch!
> 
>> --- a/drivers/clk/renesas/r9a08g045-cpg.c
>> +++ b/drivers/clk/renesas/r9a08g045-cpg.c
>> @@ -217,6 +219,16 @@ static const struct rzg2l_mod_clk r9a08g045_mod_clks[] = {
>>                                         MSTOP(PERI_COM, BIT(11))),
>>         DEF_MOD("sdhi2_aclk",           R9A08G045_SDHI2_ACLK, R9A08G045_CLK_P1, 0x554, 11,
>>                                         MSTOP(PERI_COM, BIT(11))),
>> +       DEF_COUPLED("eth0_axi",         R9A08G045_ETH0_CLK_AXI, R9A08G045_CLK_M0, 0x57c, 0,
>> +                                       MSTOP(PERI_COM, BIT(2))),
>> +       DEF_COUPLED("eth0_chi",         R9A08G045_ETH0_CLK_CHI, R9A08G045_CLK_ZT, 0x57c, 0,
>> +                                       MSTOP(PERI_COM, BIT(2))),
>> +       DEF_MOD("eth0_refclk",          R9A08G045_ETH0_REFCLK, R9A08G045_CLK_HP, 0x57c, 8, 0),
>> +       DEF_COUPLED("eth1_axi",         R9A08G045_ETH1_CLK_AXI, R9A08G045_CLK_M0, 0x57c, 1,
>> +                                       MSTOP(PERI_COM, BIT(3))),
>> +       DEF_COUPLED("eth1_chi",         R9A08G045_ETH1_CLK_CHI, R9A08G045_CLK_ZT, 0x57c, 1,
>> +                                       MSTOP(PERI_COM, BIT(3))),
>> +       DEF_MOD("eth1_refclk",          R9A08G045_ETH1_REFCLK, R9A08G045_CLK_HP, 0x57c, 9, 0),
>>         DEF_MOD("scif0_clk_pck",        R9A08G045_SCIF0_CLK_PCK, R9A08G045_CLK_P0, 0x584, 0,
>>                                         MSTOP(MCPU2, BIT(1))),
>>         DEF_MOD("gpio_hclk",            R9A08G045_GPIO_HCLK, R9A08G045_OSCCLK, 0x598, 0, 0),
> 
> LGTM, pending the MSTOP() part.
> 
> Is the MSTOP() handling needed to function? IIUIC, all modules are
> enabled
> out of reset.

MSTOP is not needed for Ethernet to work. Indeed, all modules are enabled
out of reset.

> If it is not needed, I can take this patch and remove the MSTOP() part.

It's OK for me. Thank you for handling this.

Anyway, let me know if you encounter issues with it so I can resend it.

Thank you,
Claudiu Beznea

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>