Add description of pre-timeout in mtk-wdt.
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Wang Qing <wangqing@xxxxxxxx>
---
Documentation/devicetree/bindings/watchdog/mtk-wdt.txt | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
index e36ba60..8e27777
--- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
@@ -1,5 +1,8 @@
Mediatek SoCs Watchdog timer
+The watchdog supports a pre-timeout interrupt that fires timeout-sec/2
+before the expiry.
+
Required properties:
- compatible should contain:
@@ -17,6 +20,7 @@ Required properties:
- reg : Specifies base physical address and size of the registers.
Optional properties:
+- interrupts: Watchdog pre-timeout (bark) interrupt.
- timeout-sec: contains the watchdog timeout in seconds.
- #reset-cells: Should be 1.
@@ -26,6 +30,7 @@ watchdog: watchdog@10007000 {
compatible = "mediatek,mt8183-wdt",
"mediatek,mt6589-wdt";
reg = <0 0x10007000 0 0x100>;
+ interrupts = <GIC_SPI 139 IRQ_TYPE_NONE>;
timeout-sec = <10>;
#reset-cells = <1>;
};
--
2.7.4
