[PATCH v3 07/22] arm64: dts: mediatek: mt7988: Add CPU OPP table for clock scaling

Frank Wunderlich
2024-12-17T09:12:59Z

Add operating points defining frequency/voltages of cpu cores.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
changes:
v3:
- change commit-title
v2:
- drop cpu-labels for now
---
arch/arm64/boot/dts/mediatek/mt7988a.dtsi | 38 +++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
index 5e53ea47f159..a7954bf5c81e 100644
--- a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
@@ -21,6 +21,10 @@ cpu@0 {
reg = <0x0>;
device_type = "cpu";
enable-method = "psci";
+ clocks = <&mcusys CLK_MCU_ARM_DIV_SEL>,
+ <&topckgen CLK_TOP_XTAL>;
+ clock-names = "cpu", "intermediate";
+ operating-points-v2 = <&cluster0_opp>;
};

cpu@1 {
@@ -28,6 +32,10 @@ cpu@1 {
reg = <0x1>;
device_type = "cpu";
enable-method = "psci";
+ clocks = <&mcusys CLK_MCU_ARM_DIV_SEL>,
+ <&topckgen CLK_TOP_XTAL>;
+ clock-names = "cpu", "intermediate";
+ operating-points-v2 = <&cluster0_opp>;
};

cpu@2 {
@@ -35,6 +43,10 @@ cpu@2 {
reg = <0x2>;
device_type = "cpu";
enable-method = "psci";
+ clocks = <&mcusys CLK_MCU_ARM_DIV_SEL>,
+ <&topckgen CLK_TOP_XTAL>;
+ clock-names = "cpu", "intermediate";
+ operating-points-v2 = <&cluster0_opp>;
};

cpu@3 {
@@ -42,6 +54,32 @@ cpu@3 {
reg = <0x3>;
device_type = "cpu";
enable-method = "psci";
+ clocks = <&mcusys CLK_MCU_ARM_DIV_SEL>,
+ <&topckgen CLK_TOP_XTAL>;
+ clock-names = "cpu", "intermediate";
+ operating-points-v2 = <&cluster0_opp>;
+ };
+
+ cluster0_opp: opp-table-0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp-800000000 {
+ opp-hz = /bits/ 64 <800000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-1100000000 {
+ opp-hz = /bits/ 64 <1100000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-1500000000 {
+ opp-hz = /bits/ 64 <1500000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-1800000000 {
+ opp-hz = /bits/ 64 <1800000000>;
+ opp-microvolt = <900000>;
+ };
};
};

--
2.43.0