Re: [PATCH] arm64: dts: mediatek: mt8186: fix clock names for power domains

[AngeloGioacchino Del Regno]

Il 05/10/23 12:30, Eugen Hristev ha scritto:
> Clocks for each power domain are split into big categories: pd clocks
> and subsys clocks.
> According to the binding, all clocks which have a dash '-' in their name
> are treated as subsys clocks, and must be placed at the end of the list.
> The other clocks which are pd clocks must come first.
> Fixed the naming and the placing of all clocks in the power domains.
> For the avoidance of doubt, prefixed all subsys clocks with the 'subsys'
> prefix. The binding does not enforce strict clock names, the driver
> uses them in bulk, only making a difference for pd clocks vs subsys clocks.
>
> The above problem appears to be trivial, however, it leads to incorrect
> power up and power down sequence of the power domains, because some
> clocks will be mistakenly taken for subsys clocks and viceversa.
> One consequence is the fact that if the DIS power domain goes power down
> and power back up during the boot process, when it comes back up, there
> are still transactions left on the bus which makes the display inoperable.
>
> Some of the clocks for the DIS power domain were wrongly using '_' instead
> of '-', which again made these clocks being treated as pd clocks instead of
> subsys clocks.
>
> Fixes: d9e43c1e7a38 ("arm64: dts: mt8186: Add power domains controller")
> Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>