[PATCH v4 05/13] arm64: dts: mediatek: mt7988: add cci node

Frank Wunderlich
2025-06-16T10:57:22Z

Add cci devicetree node for cpu frequency scaling.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
v3:
- add mt7988-cci compatible as suggested by angelo
---
arch/arm64/boot/dts/mediatek/mt7988a.dtsi | 33 +++++++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
index c46b31f8d653..560ec86dbec0 100644
--- a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
@@ -12,6 +12,35 @@ / {
#address-cells = <2>;
#size-cells = <2>;

+ cci: cci {
+ compatible = "mediatek,mt7988-cci", "mediatek,mt8183-cci";
+ clocks = <&mcusys CLK_MCU_BUS_DIV_SEL>,
+ <&topckgen CLK_TOP_XTAL>;
+ clock-names = "cci", "intermediate";
+ operating-points-v2 = <&cci_opp>;
+ };
+
+ cci_opp: opp-table-cci {
+ compatible = "operating-points-v2";
+ opp-shared;
+ opp-480000000 {
+ opp-hz = /bits/ 64 <480000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-660000000 {
+ opp-hz = /bits/ 64 <660000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-900000000 {
+ opp-hz = /bits/ 64 <900000000>;
+ opp-microvolt = <850000>;
+ };
+ opp-1080000000 {
+ opp-hz = /bits/ 64 <1080000000>;
+ opp-microvolt = <900000>;
+ };
+ };
+
cpus {
#address-cells = <1>;
#size-cells = <0>;
@@ -25,6 +54,7 @@ cpu0: cpu@0 {
<&topckgen CLK_TOP_XTAL>;
clock-names = "cpu", "intermediate";
operating-points-v2 = <&cluster0_opp>;
+ mediatek,cci = <&cci>;
};

cpu1: cpu@1 {
@@ -36,6 +66,7 @@ cpu1: cpu@1 {
<&topckgen CLK_TOP_XTAL>;
clock-names = "cpu", "intermediate";
operating-points-v2 = <&cluster0_opp>;
+ mediatek,cci = <&cci>;
};

cpu2: cpu@2 {
@@ -47,6 +78,7 @@ cpu2: cpu@2 {
<&topckgen CLK_TOP_XTAL>;
clock-names = "cpu", "intermediate";
operating-points-v2 = <&cluster0_opp>;
+ mediatek,cci = <&cci>;
};

cpu3: cpu@3 {
@@ -58,6 +90,7 @@ cpu3: cpu@3 {
<&topckgen CLK_TOP_XTAL>;
clock-names = "cpu", "intermediate";
operating-points-v2 = <&cluster0_opp>;
+ mediatek,cci = <&cci>;
};

cluster0_opp: opp-table-0 {
--
2.43.0