[PATCH v2 1/3] clk: rockchip: rk3399: make CPU clocks critical

Doug Anderson dianders at chromium.org
Wed Sep 8 12:44:19 PDT 2021


On Wed, Sep 8, 2021 at 11:14 AM Brian Norris <briannorris at chromium.org> wrote:
> The CPU clocks don't currently have any owner (e.g., cpufreq-dt doesn't
> enable() them -- and even if it did, it's not early enough compared to
> other consumers -- nor does arch/arm64/kernel/smp.c), and instead are
> simply assumed to be "on" all the time.
> They are also parents of a few other clocks which haven't been
> previously exposed for other devices to consume. If we want to expose
> those clocks, then the common clock framework may eventually choose to
> disable their parents (including the CPU PLLs) -- which is no fun for
> anyone.
> Thus, mark the CPU clocks as critical, to prevent them from being
> disabled implicitly.
> Signed-off-by: Brian Norris <briannorris at chromium.org>
> ---
> Changes in v2:
>   - New, split from the patch that requires this change
>  drivers/clk/rockchip/clk-rk3399.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)

Reviewed-by: Douglas Anderson <dianders at chromium.org>

More information about the Linux-rockchip mailing list