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Date:   Mon, 23 Jan 2017 14:21:05 -0600
From:   Rob Herring <robh@...nel.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Janos Laube <janos.dev@...il.com>,
        Paulius Zaleckas <paulius.zaleckas@...il.com>,
        openwrt-devel@...nwrt.org, Arnd Bergmann <arnd@...db.de>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 11/22] ARM: dts: add top-level DT bindings for Cortina
 Gemini

On Sun, Jan 22, 2017 at 01:22:19PM +0100, Linus Walleij wrote:
> This adds the top level SoC bindings for Cortina systems Gemini
> platforms.
> 
> Cc: Janos Laube <janos.dev@...il.com>
> Cc: Paulius Zaleckas <paulius.zaleckas@...il.com>
> Cc: Hans Ulli Kroll <ulli.kroll@...glemail.com>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  Documentation/devicetree/bindings/arm/gemini.txt | 58 ++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/arm/gemini.txt
> 
> diff --git a/Documentation/devicetree/bindings/arm/gemini.txt b/Documentation/devicetree/bindings/arm/gemini.txt
> new file mode 100644
> index 000000000000..28ce7db0cfd3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/gemini.txt
> @@ -0,0 +1,58 @@
> +Cortina systems Gemini platforms
> +
> +The gemini SoC is an ARMv4 SoC from Cortina systems used for NAS
> +and similar usecases.
> +
> +Required properties (in root node):
> +	compatible = "cortina,gemini";
> +
> +Required nodes:
> +
> +- syscon: the root node must have a system controller node pointing to the
> +  global control registers, with the compatible string
> +  "cortina,gemini-syscon", "syscon";
> +
> +- timer: the root node must have a timer node pointing to the SoC timer
> +  block, with the compatible string "cortina,gemini-timer"
> +  See: clocksource/cortina,gemini-timer.txt
> +
> +- intcon: the root node must have an interrupt controller node pointing to

intcon is just a source label and not meaningful for the binding.

> +  the SoC interrupt controller block, with the compatible string
> +  "cortina,gemini-interrupt-controller"
> +  See interrupt-controller/cortina,gemini-interrupt-controller.txt
> +
> +Example:
> +
> +/ {
> +	interrupt-parent = <&intcon>;
> +
> +	syscon: syscon@...00000 {

This chip has no internal bus? Put all these nodes under a bus.

> +		compatible = "cortina,gemini-syscon", "syscon";
> +		reg = <0x40000000 0x1000>;
> +	};
> +
> +	timer@...00000 {
> +		compatible = "cortina,gemini-timer";
> +		reg = <0x43000000 0x1000>;
> +		interrupt-parent = <&intcon>;
> +		interrupts = <14 IRQ_TYPE_EDGE_RISING>, /* Timer 1 */
> +			   <15 IRQ_TYPE_EDGE_RISING>, /* Timer 2 */
> +			   <16 IRQ_TYPE_EDGE_RISING>; /* Timer 3 */
> +		syscon = <&syscon>;
> +	};
> +
> +	uart0: serial@...00000 {
> +		compatible = "ns16550a";
> +		reg = <0x42000000 0x100>;
> +		clock-frequency = <48000000>;
> +		interrupts = <18 IRQ_TYPE_LEVEL_HIGH>;
> +		reg-shift = <2>;
> +	};
> +
> +	intcon: interrupt-controller@...00000 {
> +		compatible = "cortina,gemini-interrupt-controller";
> +		reg = <0x48000000 0x1000>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +	};
> +};
> -- 
> 2.9.3
> 
> --
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