[PATCH v2 1/2] Documentation: DT: Add entry for ARM SP805-WDT

[Rob Herring]

On Fri, Dec 11, 2015 at 05:17:46PM +0530, Bhupesh Sharma wrote:
> This patch adds a devicetree binding documentation for ARM's
> SP805 WatchDog Timer.
> 
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma at freescale.com>
> ---
>  .../devicetree/bindings/watchdog/sp805-wdt.txt     |   29 ++++++++++++++++++++
>  1 file changed, 29 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt b/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> new file mode 100644
> index 0000000..45b5afc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> @@ -0,0 +1,29 @@
> +* ARM SP805 Watchdog Timer (WDT) Controller
> +
> +SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
> +can be used to identify the peripheral type, vendor, and revision.
> +This value can be used for driver matching.
> +
> +As SP805 WDT is a primecell IP, it follows the base bindings specified in
> +'arm/primecell.txt'
> +
> +Required properties:
> +- compatible : Should be "arm,sp805-wdt", "arm,primecell"
> +- reg : Base address and size of the watchdog timer registers.
> +- clocks : From common clock binding.
> +           First clock is PCLK and the second is WDOGCLK.
> +           WDOGCLK can be equal to or be a sub-multiple of the PCLK frequency.
> +- clock-names : From common clock binding. Shall be "apb_pclk" for first clock.

And for the 2nd clock?

> +
> +Optional properties:
> +- interrupts : Should specify WDT interrupt number.
> +
> +Examples:
> +
> +		cluster1_core0_watchdog: wdt at c000000 {
> +			compatible = "arm,sp805-wdt", "arm,primecell";
> +			reg = <0x0 0xc000000 0x0 0x1000>;
> +			clocks = <&clockgen 4 3>, <&clockgen 4 3>;
> +			clock-names = "apb_pclk", "wdog_clk";
> +		};
> +
> -- 
> 1.7.9.5
> 
>