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doc: mtk-wdt: support pre-timeout when the bark irq is available 

Add description of pre-timeout in mtk-wdt.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1619148020-2236-3-git-send-email-wangqing@vivo.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Wang Qing 2021-04-25 09:52:07 +08:00 committed by Wim Van Sebroeck
parent 1bbce7792b
commit 5f8ebd4766
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
View File

@ -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>;
};