linux-kernel - [PATCH 1/4] dt-bindings: watchdog: aspeed: Add property for WDT SW reset

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Message-ID: <20241007063408.2360874-2-chin-ting_kuo@aspeedtech.com>
Date: Mon, 7 Oct 2024 14:34:05 +0800
From: Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
To: <patrick@...cx.xyz>, <wim@...ux-watchdog.org>, <linux@...ck-us.net>,
	<robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<joel@....id.au>, <andrew@...econstruct.com.au>,
	<linux-watchdog@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-aspeed@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>
CC: <Peter.Yin@...ntatw.com>, <Patrick_NC_Lin@...ynn.com>,
	<Bonnie_Lo@...ynn.com>, <DELPHINE_CHIU@...ynn.com>, <BMC-SW@...eedtech.com>
Subject: [PATCH 1/4] dt-bindings: watchdog: aspeed: Add property for WDT SW reset

Add "aspeed,restart-sw" property to distinguish normal WDT
reset from system restart triggered by SW consciously.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
---
 .../bindings/watchdog/aspeed,ast2400-wdt.yaml         | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/watchdog/aspeed,ast2400-wdt.yaml b/Documentation/devicetree/bindings/watchdog/aspeed,ast2400-wdt.yaml
index be78a9865584..6cc3604c295a 100644
--- a/Documentation/devicetree/bindings/watchdog/aspeed,ast2400-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/aspeed,ast2400-wdt.yaml
@@ -95,6 +95,17 @@ properties:
       array with the first word defined using the AST2600_WDT_RESET1_* macros,
       and the second word defined using the AST2600_WDT_RESET2_* macros.
 
+  aspeed,restart-sw:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: >
+      Normally, ASPEED WDT reset may occur when system hangs or reboot
+      triggered by SW consciously. However, system doesn't know whether the
+      restart is triggered by SW consciously since the reset event flag is
+      the same as normal WDT timeout reset. With this property, SW can
+      restart the system immediately and directly without wait for WDT
+      timeout occurs. The reset event flag is also different from the normal
+      WDT reset. This property is only supported since AST2600 platform.
+
 required:
   - compatible
   - reg
-- 
2.34.1