linux-kernel - [PATCH v2 2/3] dt-bindings: watchdog: fsl-imx: document suspend in wait mode

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Date:   Tue, 25 Oct 2022 09:25:32 +0200
From:   Andrej Picej <andrej.picej@...ik.com>
To:     linux-watchdog@...r.kernel.org
Cc:     wim@...ux-watchdog.org, linux@...ck-us.net, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, Anson.Huang@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/3] dt-bindings: watchdog: fsl-imx: document suspend in wait mode

Property "fsl,suspend-in-wait" suspends watchdog in "WAIT" mode which
corresponds to Linux's Suspend-to-Idle S0 mode. If this property is not
set and the device is put into Suspend-to-Idle mode, the watchdog
triggers a reset after 128 seconds.

Signed-off-by: Andrej Picej <andrej.picej@...ik.com>
Reviewed-by: Fabio Estevam <festevam@...il.com>
---
Changes in v2:
 - add a commit message,
 - add a list of devices which support this functionality
---
 .../bindings/watchdog/fsl-imx-wdt.yaml        | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml
index fb7695515be1..9289de97859b 100644
--- a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml
@@ -55,6 +55,28 @@ properties:
       If present, the watchdog device is configured to assert its
       external reset (WDOG_B) instead of issuing a software reset.
 
+  fsl,suspend-in-wait:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      If present, the watchdog device is suspended in WAIT mode
+      (Suspend-to-Idle). Only supported on following devices:
+        - "fsl,imx25-wdt",
+        - "fsl,imx35-wdt",
+        - "fsl,imx50-wdt",
+        - "fsl,imx51-wdt",
+        - "fsl,imx53-wdt",
+        - "fsl,imx6q-wdt",
+        - "fsl,imx6sl-wdt",
+        - "fsl,imx6sll-wdt",
+        - "fsl,imx6sx-wdt",
+        - "fsl,imx6ul-wdt",
+        - "fsl,imx7d-wdt",
+        - "fsl,imx8mm-wdt",
+        - "fsl,imx8mn-wdt",
+        - "fsl,imx8mp-wdt",
+        - "fsl,imx8mq-wdt",
+        - "fsl,vf610-wdt".
+
 required:
   - compatible
   - interrupts
-- 
2.25.1