linux-kernel - [Patch v4 4/6] arm64: dts: qcom: sdm45: Add support for LMh node

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Message-Id: <20210727152512.1098329-5-thara.gopinath@linaro.org>
Date:   Tue, 27 Jul 2021 11:25:10 -0400
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, rui.zhang@...el.com,
        daniel.lezcano@...aro.org, viresh.kumar@...aro.org,
        rjw@...ysocki.net, robh+dt@...nel.org
Cc:     steev@...i.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [Patch v4 4/6] arm64: dts: qcom: sdm45: Add support for LMh node

Add LMh nodes for cpu cluster0 and cpu cluster1. Also add interrupt
support in cpufreq node to capture the LMh interrupt and let the scheduler
know of the max frequency throttling.

Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---

v3->v4:
	- Changed dt property qcom,lmh-cpu-id to qcom,lmh-cpu and made it
	  a phandle pointing to the cpu node instead of a number as per
	  Rob Herring's review comments.
	- Added suffix -millicelsius to all temperature properties as per
	  Rob Herring's review comments.

v2->v3:
	- Changed the LMh low and high trip to 94500 and 95000 mC from
	  74500 and 75000 mC. This was a bug that got introduced in v2.
v1->v2:
	- Dropped dt property qcom,support-lmh as per Bjorn's review comments.
	- Changed lmh compatible from generic to platform specific.
	- Introduced properties specifying arm, low and high temp thresholds for LMh
	  as per Daniel's suggestion.

 arch/arm64/boot/dts/qcom/sdm845.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 1796ae8372be..0bf98f072921 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -3646,6 +3646,30 @@ swm: swm@c85 {
 			};
 		};
 
+		lmh_cluster1: lmh@...70800 {
+			compatible = "qcom,sdm845-lmh";
+			reg = <0 0x17d70800 0 0x401>;
+			interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
+			qcom,lmh-cpu = <&CPU4>;
+			qcom,lmh-temp-arm-millicelsius = <65000>;
+			qcom,lmh-temp-low-millicelsius = <94500>;
+			qcom,lmh-temp-high-millicelsius = <95000>;
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+
+		lmh_cluster0: lmh@...78800 {
+			compatible = "qcom,sdm845-lmh";
+			reg = <0 0x17d78800 0 0x401>;
+			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+			qcom,lmh-cpu = <&CPU0>;
+			qcom,lmh-temp-arm-millicelsius = <65000>;
+			qcom,lmh-temp-low-millicelsius = <94500>;
+			qcom,lmh-temp-high-millicelsius = <95000>;
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+
 		sound: sound {
 		};
 
@@ -4911,6 +4935,8 @@ cpufreq_hw: cpufreq@...43000 {
 			reg = <0 0x17d43000 0 0x1400>, <0 0x17d45800 0 0x1400>;
 			reg-names = "freq-domain0", "freq-domain1";
 
+			interrupts-extended = <&lmh_cluster0 0>, <&lmh_cluster1 0>;
+
 			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>;
 			clock-names = "xo", "alternate";
 
-- 
2.25.1