linux-kernel - [PATCH 2/2] dt-bindings: watchdog: aspeed: Document aspeed,pre-timeout-irq-us

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Date:   Fri, 21 Oct 2022 10:15:59 -0500
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-watchdog@...r.kernel.org
Cc:     linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        wim@...ux-watchdog.org, linux@...ck-us.net, andrew@...id.au,
        joel@....id.au, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        Eddie James <eajames@...ux.ibm.com>
Subject: [PATCH 2/2] dt-bindings: watchdog: aspeed: Document aspeed,pre-timeout-irq-us

Document this new property for the pre-timeout interrupt.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
index a8197632d6d2..81d2c35ca7e3 100644
--- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
@@ -40,12 +40,17 @@ Optional properties:
 			specified no external signal is sent.
  - aspeed,ext-pulse-duration: External signal pulse duration in microseconds
 
-Optional properties for AST2500-compatible watchdogs:
+Optional properties for AST2500 and AST2600 compatible watchdogs:
  - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's
 			 drive type to push-pull. The default is open-drain.
  - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin
 			   is configured as push-pull, then set the pulse
 			   polarity to active-high. The default is active-low.
+ - aspeed,pre-timeout-irq-us: If aspeed,pre-timeout-irq-us is non-zero, the
+			      pre-timeout interrupt will be enabled for the
+			      watchdog. The interrupt will fire the specified
+			      number of microseconds before the watchdog expires
+			      and trigger a kernel panic.
 
 Example:
 
-- 
2.31.1