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Message-Id: <20211202093230.3951996-3-andrej.picej@norik.com>
Date: Thu, 2 Dec 2021 10:32:29 +0100
From: Andrej Picej <andrej.picej@...ik.com>
To: support.opensource@...semi.com, linux@...ck-us.net,
linux-watchdog@...r.kernel.org
Cc: andrej.picej@...ik.com, wim@...ux-watchdog.org,
linux-kernel@...r.kernel.org, robh+dt@...nel.org,
devicetree@...r.kernel.org, shawnguo@...nel.org,
s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
linux-imx@....com, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 3/4] dt-bindings: watchdog: da9062: add watchdog timeout mode
Document the watchdog timeout mode property. If this property is used
the user can select what happens on watchdog timeout. Set this property
to 1 to enable SHUTDOWN (the device resets), set it to 0 and the device
will go to POWERDOWN on watchdog timeout.
If this property is not set, don't touch the WATCHDOG_SD bit and leave
the configuration to OTP. This way backward compatibility is not broken.
Signed-off-by: Andrej Picej <andrej.picej@...ik.com>
---
Changes in v4:
- no changes
Changes in v3:
- add note about using the default OTP setting if this DT binding is
not specified
Changes in v2:
- new patch, document new DT binding
---
Documentation/devicetree/bindings/watchdog/da9062-wdt.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
index 950e4fba8dbc..354314d854ef 100644
--- a/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt
@@ -10,6 +10,12 @@ Optional properties:
- dlg,use-sw-pm: Add this property to disable the watchdog during suspend.
Only use this option if you can't use the watchdog automatic suspend
function during a suspend (see register CONTROL_B).
+- dlg,wdt-sd: Set what happens on watchdog timeout. If this bit is set the
+ watchdog timeout triggers SHUTDOWN, if cleared the watchdog triggers
+ POWERDOWN. Can be 0 or 1. Only use this option if you want to change the
+ default chip's OTP setting for WATCHDOG_SD bit. If this property is NOT
+ set the WATCHDOG_SD bit and on timeout watchdog behavior will match the
+ chip's OTP settings.
Example: DA9062
--
2.25.1
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