The PICO-IMX7D SoM has the usual power supply configuration using output sw1a of PF3000 PMIC, which was defined in downstream derivative of linux-imx (see link) in the sources for "Android Things" devkit. It is required to support CPU frequency scaling. Map the respective "cpu-supply" nodes of each core to sw1a of the PMIC. Enabling them causes cpufreq-dt, and imx-thermal drivers to probe successfully, and CPU frequency scaling to function. Link: https://android.googlesource.com/platform/hardware/bsp/kernel/nxp/imx-v4.1/+/o-iot-preview-5/arch/arm/boot/dts/imx7d-pico.dtsi#849 Cc: Fabio Estevam <festevam@xxxxxxxxx> Cc: Shawn Guo <shawnguo@xxxxxxxxxx> Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> Signed-off-by: Lech Perczak <lech.perczak@xxxxxxxxx> --- arch/arm/boot/dts/nxp/imx/imx7d-pico.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/nxp/imx/imx7d-pico.dtsi b/arch/arm/boot/dts/nxp/imx/imx7d-pico.dtsi index c5eefe89cd99..8d5037ac03c7 100644 --- a/arch/arm/boot/dts/nxp/imx/imx7d-pico.dtsi +++ b/arch/arm/boot/dts/nxp/imx/imx7d-pico.dtsi @@ -108,6 +108,14 @@ &clks { assigned-clock-rates = <0>, <32768>; }; +&cpu0 { + cpu-supply = <&sw1a_reg>; +}; + +&cpu1 { + cpu-supply = <&sw1a_reg>; +}; + &ecspi3 { cs-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>; pinctrl-names = "default"; base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86 -- 2.39.2
