[PATCH 5/5] arm64: marvell: add Device Tree files for Armada 7K/8K

Hello,

On Tue, 16 Feb 2016 13:42:19 +0800, Jisheng Zhang wrote:

quoted

+/ {
+	model = "Marvell Armada AP806";
+	compatible = "marvell,armada-ap806";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	psci {
+		compatible = "arm,psci-0.2";

I guess the firmware is also psci-1.0 compatible.

At boot time, the kernel queries the PSCI firmware, and it says:

[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv0.2 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs

So I think psci-0.2 is correct here. Should this change for the
production revision of the chip, we'll send an update to the Device
Tree accordingly.

quoted

+	ap806 {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		compatible = "simple-bus";
+		interrupt-parent = <&gic>;
+		ranges;
+
+		config-space {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "simple-bus";
+			ranges = <0x0 0x0 0xf0000000 0x1000000>;
+
+			gic: interrupt-controller at 210000 {
+				compatible = "arm,cortex-a15-gic",
+					     "arm,cortex-a9-gic";

I guess the GIC is neither the one in cortex-a15 or cortex-a9. 

What makes you think this?

The GIC is a GIC400, which is GICv2 compliant, and arm-cortex-a15-gic /
arm-cortex-a9-gic are valid compatible strings to identify a GICv2
compliant interrupt controller.

See:

arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi:              compatible = "arm,gic-400", "arm,cortex-a15-gic";
arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi:           compatible = "arm,gic-400", "arm,cortex-a15-gic";
arch/arm64/boot/dts/apm/apm-shadowcat.dtsi:             compatible = "arm,cortex-a15-gic";
arch/arm64/boot/dts/apm/apm-storm.dtsi:         compatible = "arm,cortex-a15-gic";
arch/arm64/boot/dts/arm/foundation-v8.dts:              compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
arch/arm64/boot/dts/arm/juno-base.dtsi:         compatible = "arm,gic-400", "arm,cortex-a15-gic";
arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts:             compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
arch/arm64/boot/dts/marvell/armada-ap806.dtsi:                          compatible = "arm,cortex-a15-gic",
arch/arm64/boot/dts/nvidia/tegra132.dtsi:               compatible = "arm,cortex-a15-gic";
arch/arm64/boot/dts/xilinx/zynqmp.dtsi:                 compatible = "arm,gic-400", "arm,cortex-a15-gic";

Or do you have a more specific reason to think that this compatible
string is wrong?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com