[PATCH RFC 6/6] arm64: dts: apple: t8103: Add PSCI and CPU idle states

[Sven Peter <sven@kernel.org>]

Switch the base M1 from spin-table to PSCI and also add two basic idle
states that we support for now.

Signed-off-by: Sven Peter <sven@kernel.org>
---
 arch/arm64/boot/dts/apple/t8103.dtsi | 51 ++++++++++++++++++++++++++++++------
 1 file changed, 43 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
index da774096b667..3dbcaa698a90 100644
--- a/arch/arm64/boot/dts/apple/t8103.dtsi
+++ b/arch/arm64/boot/dts/apple/t8103.dtsi
@@ -24,6 +24,11 @@ aliases {
 		gpu = &gpu;
 	};
 
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "efi";
+	};
+
 	cpus {
 		#address-cells = <2>;
 		#size-cells = <0>;
@@ -64,7 +69,8 @@ cpu_e0: cpu@0 {
 			compatible = "apple,icestorm";
 			device_type = "cpu";
 			reg = <0x0 0x0>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&ecluster_opp>;
 			capacity-dmips-mhz = <714>;
@@ -78,7 +84,8 @@ cpu_e1: cpu@1 {
 			compatible = "apple,icestorm";
 			device_type = "cpu";
 			reg = <0x0 0x1>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&ecluster_opp>;
 			capacity-dmips-mhz = <714>;
@@ -92,7 +99,8 @@ cpu_e2: cpu@2 {
 			compatible = "apple,icestorm";
 			device_type = "cpu";
 			reg = <0x0 0x2>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&ecluster_opp>;
 			capacity-dmips-mhz = <714>;
@@ -106,7 +114,8 @@ cpu_e3: cpu@3 {
 			compatible = "apple,icestorm";
 			device_type = "cpu";
 			reg = <0x0 0x3>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&ecluster_opp>;
 			capacity-dmips-mhz = <714>;
@@ -120,7 +129,8 @@ cpu_p0: cpu@10100 {
 			compatible = "apple,firestorm";
 			device_type = "cpu";
 			reg = <0x0 0x10100>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&pcluster_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -134,7 +144,8 @@ cpu_p1: cpu@10101 {
 			compatible = "apple,firestorm";
 			device_type = "cpu";
 			reg = <0x0 0x10101>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&pcluster_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -148,7 +159,8 @@ cpu_p2: cpu@10102 {
 			compatible = "apple,firestorm";
 			device_type = "cpu";
 			reg = <0x0 0x10102>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&pcluster_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -162,7 +174,8 @@ cpu_p3: cpu@10103 {
 			compatible = "apple,firestorm";
 			device_type = "cpu";
 			reg = <0x0 0x10103>;
-			enable-method = "spin-table";
+			enable-method = "psci";
+			cpu-idle-states = <&cpu_retention_wfi &cpu_deep_wfi>;
 			cpu-release-addr = <0 0>; /* To be filled by loader */
 			operating-points-v2 = <&pcluster_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -185,6 +198,28 @@ l2_cache_1: l2-cache-1 {
 			cache-unified;
 			cache-size = <0xc00000>;
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			cpu_retention_wfi: cpu-retention-wfi {
+				compatible = "arm,idle-state";
+				idle-state-name = "wfi";
+				arm,psci-suspend-param = <0x00000000>;
+				entry-latency-us = <1>;
+				exit-latency-us = <1>;
+				min-residency-us = <1>;
+			};
+
+			cpu_deep_wfi: cpu-deep-wfi {
+				compatible = "arm,idle-state";
+				idle-state-name = "deep-wfi";
+				arm,psci-suspend-param = <0x00000001>;
+				entry-latency-us = <5>;
+				exit-latency-us = <5>;
+				min-residency-us = <10000>;
+			};
+		};
 	};
 
 	ecluster_opp: opp-table-0 {

-- 
2.55.0