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From: Andrej Picej <andrej.picej@norik.com>
To: support.opensource@diasemi.com, linux@roeck-us.net,
	linux-watchdog@vger.kernel.org
Cc: andrej.picej@norik.com, wim@linux-watchdog.org,
	linux-kernel@vger.kernel.org, robh+dt@kernel.org,
	devicetree@vger.kernel.org, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, linux-imx@nxp.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 3/4] dt-bindings: watchdog: da9062: add watchdog timeout mode
Date: Wed,  1 Dec 2021 09:15:11 +0100	[thread overview]
Message-ID: <20211201081512.3580837-3-andrej.picej@norik.com> (raw)
In-Reply-To: <20211201081512.3580837-1-andrej.picej@norik.com>

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@norik.com>
---
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


  parent reply	other threads:[~2021-12-01  8:15 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-01  8:15 [PATCH v3 1/4] mfd: da9062: make register CONFIG_I writable Andrej Picej
2021-12-01  8:15 ` [PATCH v3 2/4] watchdog: da9062: reset board on watchdog timeout Andrej Picej
2021-12-01 20:05   ` Adam Thomson
2021-12-02  8:31     ` Andrej Picej
2021-12-01 21:26   ` Guenter Roeck
2021-12-02  8:34     ` Andrej Picej
     [not found]   ` <13e0b9047f114722a0b4ebb4c1d24f2b@dh-electronics.com>
2021-12-02  7:43     ` Andrej Picej
2021-12-02 12:12       ` Adam Thomson
2021-12-01  8:15 ` Andrej Picej [this message]
2021-12-01  8:15 ` [PATCH v3 4/4] ARM: dts: imx6: phycore-som: set watchdog timeout mode to shutdown Andrej Picej

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