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

Bhupesh Sharma
2015-11-16T14:24:42Z

This patch adds a devicetree binding documentation for ARM's
SP805 WatchDog Timer.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
---
.../devicetree/bindings/watchdog/sp805-wdt.txt | 33 ++++++++++++++++++++
1 file changed, 33 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..ec70fe9
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
@@ -0,0 +1,33 @@
+* 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.
+
+Note that the current sp805_wdt driver relies on the 'drivers/amba/bus.c'
+framework to invoke the probe function of the sp805_wdt driver using the
+unique PRIMECELL identifiers of the sp805 wdt IP.
+
+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.
+- interrupts : Should specify WDT interrupt number.
+
+Optional properties:
+- clocks : From common clock binding. First clock is phandle to clock for apb
+ pclk. Additional clocks are optional.
+- clock-names : From common clock binding. Shall be "apb_pclk" for first clock.
+
+Examples:
+
+ cluster1_core0_watchdog: wdt@c000000 {
+ compatible = "arm,sp805-wdt", "arm,primecell";
+ reg = <0x0 0xc000000 0x0 0x1000>;
+ interrupts = <1 12 0x8>; /* PPI, Level low type */
+ clocks = <&clockgen 4 3>;
+ clock-names = "apb_pclk";
+ };
+
--
1.7.9.5