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authorBhupesh Sharma <bhupesh.sharma@freescale.com>2015-12-28 15:31:23 +0530
committerArnd Bergmann <arnd@arndb.de>2015-12-31 16:40:00 +0100
commit766faef1f4c0b37b2cb2c0de214dacf54e29ac05 (patch)
tree50261f6e62504c5bf0a85068d6a0a80944ae4c89 /Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
parent0ac01488315bac92de1b2086d87607b7ef798e8c (diff)
Documentation: DT: Add entry for ARM SP805-WDT
This patch adds a devicetree binding documentation for ARM's SP805 WatchDog Timer. Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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+* 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 "wdog_clk" for the
+ second one.
+
+Optional properties:
+- interrupts : Should specify WDT interrupt number.
+
+Examples:
+
+ cluster1_core0_watchdog: wdt@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";
+ };
+