dt-bindings: watchdog: mtk-wdt: add disable_wdt_extrst support

This patch add a description and example of disable_wdt_extrst
element for watchdog on MTK Socs

Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210914123454.32603-2-Fengquan.Chen@mediatek.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
index a4e31ce..0114871 100644 (file)
--- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
@@ -22,6 +22,7 @@ Required properties:
 - reg : Specifies base physical address and size of the registers.
 
 Optional properties:
+- mediatek,disable-extrst: disable send output reset signal
 - interrupts: Watchdog pre-timeout (bark) interrupt.
 - timeout-sec: contains the watchdog timeout in seconds.
 - #reset-cells: Should be 1.
@@ -31,6 +32,7 @@ Example:
 watchdog: watchdog@10007000 {
        compatible = "mediatek,mt8183-wdt",
                     "mediatek,mt6589-wdt";
+       mediatek,disable-extrst;
        reg = <0 0x10007000 0 0x100>;
        interrupts = <GIC_SPI 139 IRQ_TYPE_NONE>;
        timeout-sec = <10>;