Thread (24 messages) 24 messages, 7 authors, 2025-09-10

Re: [PATCH 5/5] arm64: dts: qcom: sc8280xp: Add OPP table for CCI hosts

From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Date: 2025-09-04 14:56:39
Also in: linux-arm-msm, linux-i2c, lkml

On 04/09/2025 15:31, Konrad Dybcio wrote:
quoted hunk ↗ jump to hunk
From: Konrad Dybcio <redacted>

The CCI hosts have both frequency and voltage requirements (which
happen to be common across instances on a given SoC, at least so far).

Express them by introducing an OPP table and linking it to the hosts.

Signed-off-by: Konrad Dybcio <redacted>
---
  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 14 ++++++++++++++
  1 file changed, 14 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 18b5cb441f955f7a91204376e05536b203f3e28b..c396186317d49f411d7162771a358563329a02a4 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -391,6 +391,15 @@ memory@80000000 {
  		reg = <0x0 0x80000000 0x0 0x0>;
  	};
  
+	cci_opp_table: opp-table-cci {
+		compatible = "operating-points-v2";
+
+		opp-37500000 {
+			opp-hz = /bits/ 64 <37500000>;
+			required-opps = <&rpmhpd_opp_low_svs>;
+		};
+	};
+
  	cpu0_opp_table: opp-table-cpu0 {
  		compatible = "operating-points-v2";
  		opp-shared;
@@ -4181,6 +4190,7 @@ cci0: cci@ac4a000 {
  				      "cpas_ahb",
  				      "cci";
  
+			operating-points-v2 = <&cci_opp_table>;
  			power-domains = <&camcc TITAN_TOP_GDSC>;
  
  			pinctrl-0 = <&cci0_default>;
@@ -4222,6 +4232,7 @@ cci1: cci@ac4b000 {
  				      "cpas_ahb",
  				      "cci";
  
+			operating-points-v2 = <&cci_opp_table>;
  			power-domains = <&camcc TITAN_TOP_GDSC>;
  
  			pinctrl-0 = <&cci1_default>;
@@ -4262,6 +4273,8 @@ cci2: cci@ac4c000 {
  				      "slow_ahb_src",
  				      "cpas_ahb",
  				      "cci";
+
+			operating-points-v2 = <&cci_opp_table>;
  			power-domains = <&camcc TITAN_TOP_GDSC>;
  
  			pinctrl-0 = <&cci2_default>;
@@ -4303,6 +4316,7 @@ cci3: cci@ac4d000 {
  				      "cpas_ahb",
  				      "cci";
  
+			operating-points-v2 = <&cci_opp_table>;
  			power-domains = <&camcc TITAN_TOP_GDSC>;
  
  			pinctrl-0 = <&cci3_default>;
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
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