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From:   Amjad Ouled-Ameur <aouledameur@baylibre.com>
To:     fparent@baylibre.com
Cc:     broonie@kernel.org, chaotian.jing@mediatek.com,
        chunfeng.yun@mediatek.com, devicetree@vger.kernel.org,
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Subject: Re: [PATCH 16/17] arm64: dts: mediatek: add mt8365 device-tree
Date:   Tue, 26 Jul 2022 11:57:11 +0200
Message-Id: <20220726095711.708310-1-aouledameur@baylibre.com>
In-Reply-To: <20220531135026.238475-17-fparent@baylibre.com>
References: <20220531135026.238475-17-fparent@baylibre.com>
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Hi Fabien,

Could you please add CPUIDLE support:

diff --git a/arch/arm64/boot/dts/mediatek/mt8365.dtsi b/arch/arm64/boot/dts/mediatek/mt8365.dtsi
index 323c814c10cc..1df4075db58f 100644
--- a/arch/arm64/boot/dts/mediatek/mt8365.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8365.dtsi
@@ -59,6 +59,7 @@ cpu0: cpu@0 {
 			clocks = <&mcucfg CLK_MCU_BUS_SEL>,
 				 <&apmixedsys CLK_APMIXED_MAINPLL>;
 			clock-names = "cpu", "intermediate";
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER &DPIDLE>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
@@ -72,6 +73,7 @@ cpu1: cpu@1 {
 			clocks = <&mcucfg CLK_MCU_BUS_SEL>,
 				 <&apmixedsys CLK_APMIXED_MAINPLL>;
 			clock-names = "cpu", "intermediate", "armpll";
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER &DPIDLE>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
@@ -85,6 +87,7 @@ cpu2: cpu@2 {
 			clocks = <&mcucfg CLK_MCU_BUS_SEL>,
 				 <&apmixedsys CLK_APMIXED_MAINPLL>;
 			clock-names = "cpu", "intermediate", "armpll";
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER &DPIDLE>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
@@ -98,10 +101,42 @@ cpu3: cpu@3 {
 			clocks = <&mcucfg CLK_MCU_BUS_SEL>,
 				 <&apmixedsys CLK_APMIXED_MAINPLL>;
 			clock-names = "cpu", "intermediate", "armpll";
+			cpu-idle-states = <&MCDI_CPU &MCDI_CLUSTER &DPIDLE>;
 			operating-points-v2 = <&cluster0_opp>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			MCDI_CPU: mcdi-cpu {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x00010001>;
+				entry-latency-us = <300>;
+				exit-latency-us = <200>;
+				min-residency-us = <1000>;
+			};
+
+			MCDI_CLUSTER: mcdi-cluster {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x01010001>;
+				entry-latency-us = <350>;
+				exit-latency-us = <250>;
+				min-residency-us = <1200>;
+			};
+
+			DPIDLE: dpidle {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x01010004>;
+				entry-latency-us = <300>;
+				exit-latency-us = <800>;
+				min-residency-us = <3300>;
+			};
+		};
 	};
 
 	cluster0_opp: opp-table-0 {

I have tested it on i350 evk and each idle state is used properly.

Regards,
Amjad