Re: [PATCH 01/10] ARM64: dts: amlogic: Add all CPUs in cooling maps

Neil Armstrong
2018-11-16T10:07:26Z

On 16/11/2018 11:04, Viresh Kumar wrote:
> Each CPU can (and does) participate in cooling down the system but the
> DT only captures a handful of them, normally CPU0, in the cooling maps.
> Things work by chance currently as under normal circumstances its the
> first CPU of each cluster which is used by the operating systems to
> probe the cooling devices. But as soon as this CPU ordering changes and
> any other CPU is used to bring up the cooling device, we will start
> seeing failures.
>
> Also the DT is rather incomplete when we list only one CPU in the
> cooling maps, as the hardware doesn't have any such limitations.
>
> Update cooling maps to include all devices affected by individual trip
> points.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> .../dts/amlogic/meson-gxm-khadas-vim2.dts | 22 ++++++++-----------
> 1 file changed, 9 insertions(+), 13 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts b/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts
> index 313f88f8759e..cfc92d06a28f 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxm-khadas-vim2.dts
> @@ -132,19 +132,15 @@
>
> map1 {
> trip = <&cpu_alert1>;
> - cooling-device = <&gpio_fan 2 THERMAL_NO_LIMIT>;
> - };
> -
> - map2 {
> - trip = <&cpu_alert1>;
> - cooling-device =
> - <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> - };
> -
> - map3 {
> - trip = <&cpu_alert1>;
> - cooling-device =
> - <&cpu4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> + cooling-device = <&gpio_fan 2 THERMAL_NO_LIMIT>,
> + <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> + <&cpu7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> };
> };
> };
>

Acked-by: Neil Armstrong <narmstrong@baylibre.com>