[PATCH 3/3] ARM: dts: keystone: Add minimal Keystone SOC device tree data

[mark.rutland@arm.com (Mark Rutland)]

On Mon, Jun 10, 2013 at 08:55:23PM +0100, Santosh Shilimkar wrote:
> Add minimal device tree data for Keystone2 based SOCs. Patch
> contains mainly ARM related SOC data and nothing about EVM specific
> yet.
> 
> Cc: Grant Likely <grant.likely@linaro.org>
> Cc: Olof Johansson <olof@lixom.net>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: arm at kernel.org
> 
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> ---
> I have seen some ongoing #include cleanups from Stephen Warren and cpu_node
> updates from Lorenzo, but since am unaware of the dependencies, dts file is
> aligned with the v3.10rcx ARM dts files. The changes are very trivial so
> I can fix them quickly when they show up in linux-next. 
> 
>  .../devicetree/bindings/arm/keystone/keystone.txt  |    9 ++
>  arch/arm/boot/dts/keystone.dts                     |   98 ++++++++++++++++++++
>  2 files changed, 107 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/arm/keystone/keystone.txt
>  create mode 100644 arch/arm/boot/dts/keystone.dts
> 
> diff --git a/Documentation/devicetree/bindings/arm/keystone/keystone.txt b/Documentation/devicetree/bindings/arm/keystone/keystone.txt
> new file mode 100644
> index 0000000..b496d4c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/keystone/keystone.txt
> @@ -0,0 +1,9 @@
> +TI Kesytone Platforms Device Tree Bindings
> +-----------------------------------------------
> +
> +Boards with Keystone2 based devices (TCI66xxK2H) SOC shall have the
> +following properties.
> +
> +Required properties:
> + - compatible: Every devices present in Keystone SOC should be in
> +   the form "ti,keystone-*";

I'm not sure that makes sense. The GIC for example isn't a "ti,keystone-gic",
and the uarts in the soc node don't start with "ti,keystone-" either.

> diff --git a/arch/arm/boot/dts/keystone.dts b/arch/arm/boot/dts/keystone.dts
> new file mode 100644
> index 0000000..9ca7d25
> --- /dev/null
> +++ b/arch/arm/boot/dts/keystone.dts
> @@ -0,0 +1,98 @@
> +/*
> + * Copyright 2013 Texas Instruments, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +/dts-v1/;
> +/include/ "skeleton.dtsi"
> +
> +/ {
> +	model = "Texas Instruments Keystone 2 SoC";
> +	compatible =  "ti,keystone-evm";
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +	interrupt-parent = <&gic>;
> +
> +	aliases {
> +		serial0	= &uart0;
> +	};
> +
> +	memory {
> +		reg = <0x00000000 0x80000000 0x00000000 0x40000000>;
> +	};
> +
> +	cpus {
> +		interrupt-parent = <&gic>;
> +
> +		cpu at 0 {
> +			compatible = "arm,cortex-a15";
> +		};
> +
> +		cpu at 1 {
> +			compatible = "arm,cortex-a15";
> +		};
> +
> +		cpu at 2 {
> +			compatible = "arm,cortex-a15";
> +		};
> +
> +		cpu at 3 {
> +			compatible = "arm,cortex-a15";
> +		};
> +	};

It would be nice if these matched up with what's *currently* specified in the
cpu bindings (each cpu has it's reg and device_type set, cpus have the
requisite #address-cells and #size cells as required by ePAPR).

All you should need is:

	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		interrupt-parent = <&gic>;

		cpu at 0 {
			compatible = "arm,cortex-a15";
			device_type = "cpu";
			reg = <0>;
		};

		cpu at 1 {
			compatible = "arm,cortex-a15";
			device_type = "cpu";
			reg = <1>;
		};

		cpu at 2 {
			compatible = "arm,cortex-a15";
			device_type = "cpu";
			reg = <2>;
		};

		cpu at 3 {
			compatible = "arm,cortex-a15";
			device_type = "cpu";
			reg = <3>;
		};
	};

Thanks,
Mark.