[PATCH] arm64: dts: foundation-v8: Enable PSCI mode

[Daniel Thompson]

Currently if the Foundation model is running ARM Trusted Firmware then
the kernel, which is configured to use spin tables, cannot start secondary
processors or "power off" the simulation.

Add a couple of labels to the include file, and introduce a new .dts
file that uses these to override the enable-method.

Signed-off-by: Daniel Thompson <daniel.thompson at linaro.org>
---
 arch/arm64/boot/dts/arm/Makefile                   |  3 +-
 .../boot/dts/arm/foundation-v8-gicv3-psci.dts      | 51 ++++++++++++++++++++++
 arch/arm64/boot/dts/arm/foundation-v8.dtsi         |  8 ++--
 3 files changed, 57 insertions(+), 5 deletions(-)
 create mode 100644 arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts

diff --git a/arch/arm64/boot/dts/arm/Makefile b/arch/arm64/boot/dts/arm/Makefile
index 75cc2aa10101..c9ec88809f3d 100644
--- a/arch/arm64/boot/dts/arm/Makefile
+++ b/arch/arm64/boot/dts/arm/Makefile
@@ -1,4 +1,5 @@
-dtb-$(CONFIG_ARCH_VEXPRESS) += foundation-v8.dtb foundation-v8-gicv3.dtb
+dtb-$(CONFIG_ARCH_VEXPRESS) += \
+	foundation-v8.dtb foundation-v8-gicv3.dtb foundation-v8-gicv3-psci.dtb
 dtb-$(CONFIG_ARCH_VEXPRESS) += juno.dtb juno-r1.dtb juno-r2.dtb
 dtb-$(CONFIG_ARCH_VEXPRESS) += rtsm_ve-aemv8a.dtb
 dtb-$(CONFIG_ARCH_VEXPRESS) += vexpress-v2f-1xv7-ca53x2.dtb
diff --git a/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts b/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts
new file mode 100644
index 000000000000..94a249095104
--- /dev/null
+++ b/arch/arm64/boot/dts/arm/foundation-v8-gicv3-psci.dts
@@ -0,0 +1,51 @@
+/*
+ * ARM Ltd.
+ *
+ * ARMv8 Foundation model DTS (GICv3 configuration)
+ */
+
+#include "foundation-v8.dtsi"
+
+/ {
+	psci {
+		compatible = "arm,psci-1.0";
+		method = "smc";
+	};
+
+	gic: interrupt-controller at 2f000000 {
+		compatible = "arm,gic-v3";
+		#interrupt-cells = <3>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+		interrupt-controller;
+		reg =	<0x0 0x2f000000 0x0 0x10000>,
+			<0x0 0x2f100000 0x0 0x200000>,
+			<0x0 0x2c000000 0x0 0x2000>,
+			<0x0 0x2c010000 0x0 0x2000>,
+			<0x0 0x2c02f000 0x0 0x2000>;
+		interrupts = <1 9 4>;
+
+		its: its at 2f020000 {
+			compatible = "arm,gic-v3-its";
+			msi-controller;
+			reg = <0x0 0x2f020000 0x0 0x20000>;
+		};
+	};
+};
+
+&cpu0 {
+	enable-method = "psci";
+};
+
+&cpu1 {
+	enable-method = "psci";
+};
+
+&cpu2 {
+	enable-method = "psci";
+};
+
+&cpu3 {
+	enable-method = "psci";
+};
diff --git a/arch/arm64/boot/dts/arm/foundation-v8.dtsi b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
index 8ecdd4331980..8c7f8c4f090a 100644
--- a/arch/arm64/boot/dts/arm/foundation-v8.dtsi
+++ b/arch/arm64/boot/dts/arm/foundation-v8.dtsi
@@ -28,7 +28,7 @@
 		#address-cells = <2>;
 		#size-cells = <0>;

-		cpu at 0 {
+		cpu0: cpu at 0 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x0>;
@@ -36,7 +36,7 @@
 			cpu-release-addr = <0x0 0x8000fff8>;
 			next-level-cache = <&L2_0>;
 		};
-		cpu at 1 {
+		cpu1: cpu at 1 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x1>;
@@ -44,7 +44,7 @@
 			cpu-release-addr = <0x0 0x8000fff8>;
 			next-level-cache = <&L2_0>;
 		};
-		cpu at 2 {
+		cpu2: cpu at 2 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x2>;
@@ -52,7 +52,7 @@
 			cpu-release-addr = <0x0 0x8000fff8>;
 			next-level-cache = <&L2_0>;
 		};
-		cpu at 3 {
+		cpu3: cpu at 3 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x3>;
--
2.9.5