Re: [PATCH 1/5] clk: inherit clocks enabled by bootloader

[Eric Anholt]

Rob Clark <robdclark@xxxxxxxxx> writes:

> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> The goal here is to support inheriting a display setup by bootloader,
> although there may also be some non-display related use-cases.
>
> Rough idea is to add a flag for clks and power domains that might
> already be enabled when kernel starts, and which should not be
> disabled at late_initcall if the kernel thinks they are "unused".
>
> If bootloader is enabling display, and kernel is using efifb before
> real display driver is loaded (potentially from kernel module after
> userspace starts, in a typical distro kernel), we don't want to kill
> the clocks and power domains that are used by the display before
> userspace starts.
>
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>

Raspberry Pi is carrying downstream hacks to do similar stuff, and it
would be great to see CCF finally support this.

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