[Uboot-stm32] [PATCH 2/9] ARM: dts: stm32: add cpufreq support on stm32mp15x

[Patrice CHOTARD]

Hi Patrick

On 4/21/20 5:11 PM, Patrick Delaunay wrote:
> This commit adds cpufreq support on stm32mp15x SOC. STM32 cpufreq uses
> operating points V2 bindings (no legacy). Nvmem cells have to be used to
> know the chip version and then which OPPs are available. Note that STM32
> cpufreq driver is mainly based on "cpufreq-dt" driver.
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>
>  arch/arm/dts/stm32mp151.dtsi      | 21 +++++++++++++++++++++
>  arch/arm/dts/stm32mp157c-ed1.dts  |  8 ++++++++
>  arch/arm/dts/stm32mp15xx-dkx.dtsi |  8 ++++++++
>  3 files changed, 37 insertions(+)
>
> diff --git a/arch/arm/dts/stm32mp151.dtsi b/arch/arm/dts/stm32mp151.dtsi
> index f185639a46..1d465c3064 100644
> --- a/arch/arm/dts/stm32mp151.dtsi
> +++ b/arch/arm/dts/stm32mp151.dtsi
> @@ -19,6 +19,24 @@
>  			compatible = "arm,cortex-a7";
>  			device_type = "cpu";
>  			reg = <0>;
> +			operating-points-v2 = <&cpu0_opp_table>;
> +			nvmem-cells = <&part_number_otp>;
> +			nvmem-cell-names = "part_number";
> +		};
> +	};
> +
> +	cpu0_opp_table: cpu0-opp-table {
> +		compatible = "operating-points-v2";
> +		opp-shared;
> +		opp-650000000 {
> +			opp-hz = /bits/ 64 <650000000>;
> +			opp-microvolt = <1200000>;
> +			opp-supported-hw = <0x1>;
> +		};
> +		opp-800000000 {
> +			opp-hz = /bits/ 64 <800000000>;
> +			opp-microvolt = <1350000>;
> +			opp-supported-hw = <0x2>;
>  		};
>  	};
>  
> @@ -1512,6 +1530,9 @@
>  			reg = <0x5c005000 0x400>;
>  			#address-cells = <1>;
>  			#size-cells = <1>;
> +			part_number_otp: part_number_otp at 4 {
> +				reg = <0x4 0x1>;
> +			};
>  			ts_cal1: calib at 5c {
>  				reg = <0x5c 0x2>;
>  			};
> diff --git a/arch/arm/dts/stm32mp157c-ed1.dts b/arch/arm/dts/stm32mp157c-ed1.dts
> index 54af7c97b3..7215eb4768 100644
> --- a/arch/arm/dts/stm32mp157c-ed1.dts
> +++ b/arch/arm/dts/stm32mp157c-ed1.dts
> @@ -107,6 +107,14 @@
>  	};
>  };
>  
> +&cpu0{
> +	cpu-supply = <&vddcore>;
> +};
> +
> +&cpu1{
> +	cpu-supply = <&vddcore>;
> +};
> +
>  &dac {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&dac_ch1_pins_a &dac_ch2_pins_a>;
> diff --git a/arch/arm/dts/stm32mp15xx-dkx.dtsi b/arch/arm/dts/stm32mp15xx-dkx.dtsi
> index 42d3f0cb2d..861280afe8 100644
> --- a/arch/arm/dts/stm32mp15xx-dkx.dtsi
> +++ b/arch/arm/dts/stm32mp15xx-dkx.dtsi
> @@ -116,6 +116,14 @@
>  	status = "okay";
>  };
>  
> +&cpu0{
> +	cpu-supply = <&vddcore>;
> +};
> +
> +&cpu1{
> +	cpu-supply = <&vddcore>;
> +};
> +
>  &ethernet0 {
>  	status = "okay";
>  	pinctrl-0 = <&ethernet0_rgmii_pins_a>;

Reviewed-by: Patrice Chotard <patrice.chotard at st.com>

Thanks

Patrice