| Message ID | 20231229212853.277334-2-nfraprado@collabora.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] dt-bindings: cpufreq: Add big CPU supply | expand |
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi index dd5b89b73190..505da60eee90 100644 --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi @@ -502,6 +502,10 @@ &pcie1 { pinctrl-0 = <&pcie1_pins_default>; }; +&performance { + big-cpus-supply = <&mt6315_6_vbuck1>; +}; + &pio { mediatek,rsel-resistance-in-si-unit; pinctrl-names = "default";
When the mediatek-cpufreq-hw driver enables the hardware (by writing to REG_FREQ_ENABLE), if the regulator supplying the voltage to the big CPUs hasn't probed yet, the platform hangs shortly after and "rcu: INFO: rcu_preempt detected stalls on CPUs/tasks" are printed in the log. To prevent this from happening, describe the big CPUs regulator in the performance-controller DT node, so that devlink ensures the regulator has been probed and configured before the frequency scaling hardware is probed and enabled. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 4 ++++ 1 file changed, 4 insertions(+)