Re: [PATCH 12/13] arm64: dts: add Allwinner A64 SoC .dtsi

From: Andre Przywara <andre.przywara@arm.com>

The Allwinner A64 SoC is a low-cost chip with 4 ARM Cortex-A53 cores
and the typical tablet / TV box peripherals.
The SoC is based on the (32-bit) Allwinner H3 chip, sharing most of
the peripherals and the memory map.
Although the cores are proper 64-bit ones, the whole SoC is actually
limited to 4GB (including all the supported DRAM), so we use 32-bit
address and size cells. This has the nice feature of us being able to
reuse the DT for 32-bit kernels as well.
This .dtsi lists the hardware that we support so far.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
[Maxime: Convert to CCU binding, drop the MMC support for now]
Signed-off-by: Maxime Ripard <redacted>
---
 Documentation/devicetree/bindings/arm/sunxi.txt |   1 +
 MAINTAINERS                                     |   1 +
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi   | 273 ++++++++++++++++++++++++
 3 files changed, 275 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

diff --git a/Documentation/devicetree/bindings/arm/sunxi.txt b/Documentation/devicetree/bindings/arm/sunxi.txt
index 7e79fcc36b0d..7e59d8ba86af 100644
--- a/Documentation/devicetree/bindings/arm/sunxi.txt
+++ b/Documentation/devicetree/bindings/arm/sunxi.txt

@@ -14,3 +14,4 @@ using one of the following compatible strings:
   allwinner,sun8i-a83t
   allwinner,sun8i-h3
   allwinner,sun9i-a80
+  allwinner,sun50i-a64

diff --git a/MAINTAINERS b/MAINTAINERS
index 7304d2e37a98..440490126bfb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS

@@ -955,6 +955,7 @@ M:	Chen-Yu Tsai <wens@csie.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 N:	sun[x456789]i
+F:	arch/arm64/boot/dts/allwinner/
 
 ARM/Allwinner SoC Clock Support
 M:	Emilio López <emilio@elopez.com.ar>

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
new file mode 100644
index 000000000000..636165d75373
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 2016 ARM Ltd.
+ * based on the Allwinner H3 dtsi:
+ *    Copyright (C) 2015 Jens Kuske <jenskuske@gmail.com>
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <dt-bindings/clock/sun50i-a64-ccu.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/pinctrl/sun4i-a10.h>
+#include <dt-bindings/reset/sun50i-a64-ccu.h>
+
+/ {
+	interrupt-parent = <&gic>;
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			reg = <0>;
+			enable-method = "psci";
+		};
+
+		cpu@1 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			reg = <1>;
+			enable-method = "psci";
+		};
+
+		cpu@2 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			reg = <2>;
+			enable-method = "psci";
+		};
+
+		cpu@3 {
+			compatible = "arm,cortex-a53", "arm,armv8";
+			device_type = "cpu";
+			reg = <3>;
+			enable-method = "psci";
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			     <GIC_PPI 14
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			     <GIC_PPI 11
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
+			     <GIC_PPI 10
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
+	};