This patch adds Z clock scaling support for CA57 in R8A7795 SoC.
An OPP table is created with the supported frequency scaling.
Signed-off-by: Dien Pham <dien.pham.ry@xxxxxxxxxxxxxxx>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Signed-off-by: Khiem Nguyen <khiem.nguyen.xt@xxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/renesas/r8a7795.dtsi | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
index 7181db0..041d0f2 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
@@ -43,6 +43,8 @@
power-domains = <&sysc R8A7795_PD_CA57_CPU0>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ clocks =<&cpg CPG_CORE R8A7795_CLK_Z>;
+ operating-points-v2 = <&cluster0_opp_tb0>;
};
a57_1: cpu@1 {
@@ -52,6 +54,7 @@
power-domains = <&sysc R8A7795_PD_CA57_CPU1>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ operating-points-v2 = <&cluster0_opp_tb0>;
};
a57_2: cpu@2 {
compatible = "arm,cortex-a57","arm,armv8";
@@ -60,6 +63,7 @@
power-domains = <&sysc R8A7795_PD_CA57_CPU2>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ operating-points-v2 = <&cluster0_opp_tb0>;
};
a57_3: cpu@3 {
compatible = "arm,cortex-a57","arm,armv8";
@@ -68,6 +72,28 @@
power-domains = <&sysc R8A7795_PD_CA57_CPU3>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ operating-points-v2 = <&cluster0_opp_tb0>;
+ };
+ };
+
+ cluster0_opp_tb0: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp@500000000 {
+ opp-hz = /bits/ 64 <500000000>;
+ opp-microvolt = <820000>;
+ clock-latency-ns = <300000>;
+ };
+ opp@1000000000 {
+ opp-hz = /bits/ 64 <1000000000>;
+ opp-microvolt = <820000>;
+ clock-latency-ns = <300000>;
+ };
+ opp@1500000000 {
+ opp-hz = /bits/ 64 <1500000000>;
+ opp-microvolt = <820000>;
+ clock-latency-ns = <300000>;
};
};
--
1.9.1
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