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

Eric Anholt
2019-07-01T18:25:43Z

[-- Attachment #1: Type: text/plain, Size: 899 bytes --]

Rob Clark <robdclark@gmail.com> writes:

> From: Rob Clark <robdclark@chromium.org>
>
> 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@chromium.org>

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

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]