[PATCH v3 2/4] dt-bindings: watchdog: Document armada-37xx-wdt binding

[PATCH v3 2/4] dt-bindings: watchdog: Document armada-37xx-wdt binding

[Marek Behún]

This adds device tree binding documentation for the CPU watchdog found
on Armada 37xx SOCs (EspressoBin, Turris Mox).

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
---
 .../bindings/watchdog/armada-37xx-wdt.txt          | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt

diff --git a/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
new file mode 100644
index 000000000000..4ba9e40ad386
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
@@ -0,0 +1,23 @@
+* Armada 37xx CPU Watchdog Timer Controller
+
+Required properties:
+- compatible : must be "marvell,armada-3700-wdt"
+- reg : base physical address of the controller and length of memory mapped
+	region.
+- clocks : the clock feeding the watchdog timer. See clock-bindings.txt
+- marvell,system-controller : reference to syscon node for the CPU Miscellaneous
+	Registers
+
+Example:
+
+	cpu_misc: system-controller@d000 {
+		compatible = "syscon", "simple-mfd";
+		reg = <0xd000 0x1000>;
+	};
+
+	wdt: watchdog-timer@8300 {
+		compatible = "marvell,armada-3700-wdt";
+		reg = <0x8300 0x40>;
+		marvell,system-controller = <&cpu_misc>;
+		clocks = <&xtalclk>;
+	};
-- 
2.16.4

Re: [PATCH v3 2/4] dt-bindings: watchdog: Document armada-37xx-wdt binding

[Rob Herring]

On Fri, Sep 07, 2018 at 03:05:51PM +0200, Marek Beh�n wrote:
> This adds device tree binding documentation for the CPU watchdog found
> on Armada 37xx SOCs (EspressoBin, Turris Mox).
> 
> Signed-off-by: Marek Beh�n <marek.behun@nic.cz>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: devicetree@vger.kernel.org
> ---
>  .../bindings/watchdog/armada-37xx-wdt.txt          | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
> new file mode 100644
> index 000000000000..4ba9e40ad386
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt
> @@ -0,0 +1,23 @@
> +* Armada 37xx CPU Watchdog Timer Controller
> +
> +Required properties:
> +- compatible : must be "marvell,armada-3700-wdt"
> +- reg : base physical address of the controller and length of memory mapped
> +	region.
> +- clocks : the clock feeding the watchdog timer. See clock-bindings.txt
> +- marvell,system-controller : reference to syscon node for the CPU Miscellaneous
> +	Registers
> +
> +Example:
> +
> +	cpu_misc: system-controller@d000 {
> +		compatible = "syscon", "simple-mfd";

syscon alone without an SoC specific compatible is not valid and 
simple-mfd is pointless without child nodes.

> +		reg = <0xd000 0x1000>;
> +	};
> +
> +	wdt: watchdog-timer@8300 {

watchdog@...

> +		compatible = "marvell,armada-3700-wdt";
> +		reg = <0x8300 0x40>;
> +		marvell,system-controller = <&cpu_misc>;
> +		clocks = <&xtalclk>;
> +	};
> -- 
> 2.16.4
>