Re: [PATCH 2/3] dt-bindings: clock: amlogic: t7: Add missing mpll3 parent clock

From: Krzysztof Kozlowski

Date: Fri Mar 06 2026 - 03:18:20 EST


On Thu, Mar 05, 2026 at 10:03:32AM +0100, Jerome Brunet wrote:
> On jeu. 05 mars 2026 at 15:43, Jian Hu <jian.hu@xxxxxxxxxxx> wrote:
>
> > The mpll3 clock is a valid parent clock for sd_emmc and mipi_isp on
> > the Amlogic T7 SoC, but was missing from t7-peripherals-clkc.yaml.
> > Add it to enable proper clock parent configuration for these peripherals.
>
> ... but this changes the index of the clocks after this mpll3, and those
> index are supposed to be stable if I'm not mistaken.
>
> It is indeed more convenient to have the optional clocks at the end
> as it avoids writing multiple <0> in DT when we do not have them.
>
> At the very least, your commit description should say that this change
> will not break any existing DT because these bindings are not used yet.
>
> I leave it to the DT folks to say if the change is OK in such case.

Based on commit msg it is not OK, that's why we ask about explaining
true problem and actual impact, IOW whether this did not work in the
first place and authors did not bother to test it...

Best regards,
Krzysztof