[PATCH v2 2/9] ARM: dts: stm32: add cpufreq support on stm32mp15x

[Patrick Delaunay]

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

Changes in v2: None

 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 75d2c0d296..d5216a1831 100644
--- a/arch/arm/dts/stm32mp151.dtsi
+++ b/arch/arm/dts/stm32mp151.dtsi
@@ -20,6 +20,24 @@
 			clock-frequency = <650000000>;
 			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>;
 		};
 	};
 
@@ -1522,6 +1540,9 @@
 			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 4fb71100f5..9996704b59 100644
--- a/arch/arm/dts/stm32mp157c-ed1.dts
+++ b/arch/arm/dts/stm32mp157c-ed1.dts
@@ -112,6 +112,14 @@
 	};
 };
 
+&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 812e370ee4..906bd4282c 100644
--- a/arch/arm/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/dts/stm32mp15xx-dkx.dtsi
@@ -121,6 +121,14 @@
 	status = "okay";
 };
 
+&cpu0{
+	cpu-supply = <&vddcore>;
+};
+
+&cpu1{
+	cpu-supply = <&vddcore>;
+};
+
 &ethernet0 {
 	status = "okay";
 	pinctrl-0 = <&ethernet0_rgmii_pins_a>;
-- 
2.17.1