Re: [PATCH 2/7] clk: renesas: r8a77965: Add DAB clock
From: Laurent Pinchart
Date: Fri Feb 26 2021 - 07:50:36 EST
Hi Fabrizio,
Thank you for the patch.
On Fri, Feb 26, 2021 at 09:45:20AM +0100, Geert Uytterhoeven wrote:
>
On Thu, Feb 25, 2021 at 11:53 PM Fabrizio Castro wrote:
>
> This patch adds the DAB clock to the R8A77965 SoC.
>
>
>
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
>
>
Thanks for your patch!
>
>
> --- a/drivers/clk/renesas/r8a77965-cpg-mssr.c
>
> +++ b/drivers/clk/renesas/r8a77965-cpg-mssr.c
>
> @@ -250,6 +250,7 @@ static const struct mssr_mod_clk r8a77965_mod_clks[] __initconst = {
>
> DEF_MOD("ssi2", 1013, MOD_CLK_ID(1005)),
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> DEF_MOD("ssi1", 1014, MOD_CLK_ID(1005)),
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> DEF_MOD("ssi0", 1015, MOD_CLK_ID(1005)),
>
> + DEF_MOD("dab", 1016, R8A77965_CLK_S0D6),
>
>
Unfortunately this bit is not documented in the R-Car Gen3 Hardware
>
User's Manual, so I have to trust you on this.
>
>
While it's not unusual that the same module on R-Car E3 and M3-N
>
has different parent clocks, it does strike me as odd that S0D6 on M3-N
>
runs at 133 MHz, while S3D1 on E3 runs at 266 MHz.
>
Probably it doesn't matter that much, as your driver doesn't care
>
about the actual clock rate.
I have the exact same concerns, here and for 1/7.
>
> DEF_MOD("scu-all", 1017, R8A77965_CLK_S3D4),
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> DEF_MOD("scu-dvc1", 1018, MOD_CLK_ID(1017)),
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> DEF_MOD("scu-dvc0", 1019, MOD_CLK_ID(1017)),
--
Regards,
Laurent Pinchart