From: Sven Peter <sven@kernel.org>
To: Mark Rutland <mark.rutland@arm.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Sudeep Holla <sudeep.holla@kernel.org>,
Janne Grunau <j@jannau.net>, Neal Gompa <neal@gompa.dev>
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
asahi@lists.linux.dev, Sven Peter <sven@kernel.org>
Subject: [PATCH RFC 6/6] arm64: dts: apple: t8103: Add PSCI and CPU idle states
Date: Wed, 08 Jul 2026 09:15:42 +0200 [thread overview]
Message-ID: <20260708-efi-psci-v1-6-9efb3abf0e4c@kernel.org> (raw)
In-Reply-To: <20260708-efi-psci-v1-0-9efb3abf0e4c@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
prev parent reply other threads:[~2026-07-08 7:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 7:15 [PATCH RFC 0/6] PSCI-via-EFI to support firmware and kernel sharing EL2 for Apple Silicon Sven Peter
2026-07-08 7:15 ` [PATCH RFC 1/6] dt-bindings: arm: psci: Add EFI conduit Sven Peter
2026-07-08 7:15 ` [PATCH RFC 2/6] arm64/efi: Add and parse custom PSCI EFI configuration table Sven Peter
2026-07-08 7:15 ` [PATCH RFC 3/6] efi: Add EFI_MEMORY_ISA_{MASK,VALID} Sven Peter
2026-07-08 7:15 ` [PATCH RFC 4/6] arm64/efi: Honor EFI_MEMORY_ISA_MASK for Device-nGnRnE vs -nGnRE Sven Peter
2026-07-08 7:15 ` [PATCH RFC 5/6] firmware/psci: Add EFI runtime conduit Sven Peter
2026-07-08 7:15 ` Sven Peter [this message]
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