On Tue, 22 Sep 2020 at 14:40, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote:
>
> The ChipID IO region has it's own clock, which is being disabled while
> scanning for unused clocks. It turned out that some CPU hotplug, CPU idle
> or even SOC firmware code depends on the reads from that area. Fix the
> mysterious hang caused by entering deep CPU idle state by ignoring the
> 'chipid' clock during unused clocks scan, as there are no direct clients
> for it which will keep it enabled.
>
> Fixes: e062b571777f ("clk: exynos4: register clocks using common clock framework")
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> ---
> drivers/clk/samsung/clk-exynos4.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Best regards,
Krzysztof
