linux-kernel - Re: [PATCH v6 02/11] clk: sunxi-ng: nkm: consider alternative parent rates when determining rate

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Date:   Mon, 7 Aug 2023 22:28:08 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Frank Oltmanns <frank@...manns.dev>
Cc:     Maxime Ripard <mripard@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Andre Przywara <andre.przywara@....com>,
        Roman Beranek <me@...y.cz>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 02/11] clk: sunxi-ng: nkm: consider alternative parent
 rates when determining rate

On Mon, Aug 7, 2023 at 8:44 PM Frank Oltmanns <frank@...manns.dev> wrote:
>
> In case the CLK_SET_RATE_PARENT flag is set, consider using a different
> parent rate when determining a new rate.
>
> To find the best match for the requested rate, perform the following
> steps for each NKM combination:
>  - calculate the optimal parent rate,
>  - find the best parent rate that the parent clock actually supports
>  - use that parent rate to calculate the effective rate.
>
> In case the clk does not support setting the parent rate, use the same
> algorithm as before.
>
> Acked-by: Maxime Ripard <mripard@...nel.org>
> Signed-off-by: Frank Oltmanns <frank@...manns.dev>

Reviewed-by: Chen-Yu Tsai <wens@...e.org>