linux-kernel - [PATCH v3 5/7] arm64: dts: imx95: enable A55 cpuidle

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Message-Id: <20241012-imx95-dts-new-v3-5-edfab0054c71@nxp.com>
Date: Sat, 12 Oct 2024 19:19:12 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH v3 5/7] arm64: dts: imx95: enable A55 cpuidle

From: Peng Fan <peng.fan@....com>

Add cpuidle node and enable cpuidle for A55.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 arch/arm64/boot/dts/freescale/imx95.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
index ae8e09203ef431d8869fdce79df9f31a3e55971c..62bb526ba507b9fefc8d90743d653e9dadf030ef 100644
--- a/arch/arm64/boot/dts/freescale/imx95.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95.dtsi
@@ -22,12 +22,27 @@ cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
+		idle-states {
+			entry-method = "psci";
+
+			cpu_pd_wait: cpu-pd-wait {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x0010033>;
+				local-timer-stop;
+				entry-latency-us = <10000>;
+				exit-latency-us = <7000>;
+				min-residency-us = <27000>;
+				wakeup-latency-us = <15000>;
+			};
+		};
+
 		A55_0: cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a55";
 			reg = <0x0>;
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			power-domains = <&scmi_perf IMX95_PERF_A55>;
 			power-domain-names = "perf";
 			i-cache-size = <32768>;
@@ -45,6 +60,7 @@ A55_1: cpu@100 {
 			reg = <0x100>;
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			power-domains = <&scmi_perf IMX95_PERF_A55>;
 			power-domain-names = "perf";
 			i-cache-size = <32768>;
@@ -62,6 +78,7 @@ A55_2: cpu@200 {
 			reg = <0x200>;
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			power-domains = <&scmi_perf IMX95_PERF_A55>;
 			power-domain-names = "perf";
 			i-cache-size = <32768>;
@@ -79,6 +96,7 @@ A55_3: cpu@300 {
 			reg = <0x300>;
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			power-domains = <&scmi_perf IMX95_PERF_A55>;
 			power-domain-names = "perf";
 			i-cache-size = <32768>;
@@ -98,6 +116,7 @@ A55_4: cpu@400 {
 			power-domain-names = "perf";
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			i-cache-size = <32768>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <128>;
@@ -115,6 +134,7 @@ A55_5: cpu@500 {
 			power-domain-names = "perf";
 			enable-method = "psci";
 			#cooling-cells = <2>;
+			cpu-idle-states = <&cpu_pd_wait>;
 			i-cache-size = <32768>;
 			i-cache-line-size = <64>;
 			i-cache-sets = <128>;

-- 
2.37.1