linux-kernel - [PATCH] dt-bindings: watchdog: allow "timer" as node name

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Date:   Mon, 12 Dec 2022 18:49:33 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: watchdog: allow "timer" as node name

On some SoCs the watchdog device is actually mixed with timer, e.g.
the qcom,msm-timer on older Qualcomm SoCs where this is actually one
hardware block responsible for both system timer and watchdog.

Allow calling such device nodes as "timer".

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

See also:
https://lore.kernel.org/linux-arm-msm/20221212163532.142533-1-krzysztof.kozlowski@linaro.org/T/#t

which causes warnings:

qcom-msm8960-cdp.dtb: timer@...a000: $nodename:0: 'timer@...a000' does not match '^watchdog(@.*|-[0-9a-f])?$'
  From schema: Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml
---
 Documentation/devicetree/bindings/watchdog/watchdog.yaml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/watchdog/watchdog.yaml b/Documentation/devicetree/bindings/watchdog/watchdog.yaml
index e3dfb02f0ca5..b1daefec86af 100644
--- a/Documentation/devicetree/bindings/watchdog/watchdog.yaml
+++ b/Documentation/devicetree/bindings/watchdog/watchdog.yaml
@@ -14,9 +14,14 @@ description: |
   This document describes generic bindings which can be used to
   describe watchdog devices in a device tree.
 
+select:
+  properties:
+    $nodename:
+      pattern: "^watchdog(@.*|-[0-9a-f])?$"
+
 properties:
   $nodename:
-    pattern: "^watchdog(@.*|-[0-9a-f])?$"
+    pattern: "^(timer|watchdog)(@.*|-[0-9a-f])?$"
 
   timeout-sec:
     description:
-- 
2.34.1