[PATCH v4 1/2] dt-bindings: watchdog: Add Nuvoton NPCM description

[Joel Stanley <joel@jms.id.au>]

These bindings describe the watchdog IP as used by the Nuvoton NPCM750
(Poleg) BMC SoC.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
V2: Add optional timeout property
v3:
 - Fix address in example
 - Add Rob's reviewed-by
---
 .../bindings/watchdog/nuvoton,npcm-wdt.txt         | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt

diff --git a/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
new file mode 100644
index 000000000000..6d593003c933
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
@@ -0,0 +1,28 @@
+Nuvoton NPCM Watchdog
+
+Nuvoton NPCM timer module provides five 24-bit timer counters, and a watchdog.
+The watchdog supports a pre-timeout interrupt that fires 10ms before the
+expiry.
+
+Required properties:
+- compatible      : "nuvoton,npcm750-wdt" for NPCM750 (Poleg).
+- reg             : Offset and length of the register set for the device.
+- interrupts      : Contain the timer interrupt with flags for
+                    falling edge.
+
+Required clocking property, have to be one of:
+- clocks          : phandle of timer reference clock.
+- clock-frequency : The frequency in Hz of the clock that drives the NPCM7xx
+                    timer (usually 25000000).
+
+Optional properties:
+- timeout-sec : Contains the watchdog timeout in seconds
+
+Example:
+
+timer@f000801c {
+    compatible = "nuvoton,npcm750-wdt";
+    interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+    reg = <0xf000801c 0x4>;
+    clocks = <&clk NPCM7XX_CLK_TIMER>;
+};
-- 
2.15.1