linux-kernel - [PATCH v3 1/3] dt-bindings: pwm: Fix node name pattern

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Date:   Thu, 20 Jan 2022 21:14:40 +0500
From:   Nikita Travkin <nikita@...n.ru>
To:     thierry.reding@...il.com, lee.jones@...aro.org
Cc:     u.kleine-koenig@...gutronix.de, robh+dt@...nel.org,
        sboyd@...nel.org, krzk@...nel.org, linus.walleij@...aro.org,
        masneyb@...tation.org, linux-pwm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Nikita Travkin <nikita@...n.ru>
Subject: [PATCH v3 1/3] dt-bindings: pwm: Fix node name pattern

It looks like it was intended to allow two types of node names with the
binding:

 - With unit address, e.g. pwm@...00000
 - With a suffix, e.g. pwm-clk

However the pattern regex only correctly matches the first variant,
as well as some incorrect ones.

Fix the regex to match only two patterns shown above. (Either unit
address starting with @ and following with one or more hexademical
digit or arbitrary suffix stating with - and at least one symbol long)

Fixes: 89650a1e3b6f ("dt-bindings: pwm: Convert PWM bindings to json-schema")
Signed-off-by: Nikita Travkin <nikita@...n.ru>
---
 Documentation/devicetree/bindings/pwm/pwm.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm.yaml b/Documentation/devicetree/bindings/pwm/pwm.yaml
index 3c01f85029e5..4926fe65886f 100644
--- a/Documentation/devicetree/bindings/pwm/pwm.yaml
+++ b/Documentation/devicetree/bindings/pwm/pwm.yaml
@@ -13,7 +13,7 @@ select: false
 
 properties:
   $nodename:
-    pattern: "^pwm(@.*|-[0-9a-f])*$"
+    pattern: "^pwm(@[0-9a-f]+|-.+)?$"
 
   "#pwm-cells":
     description:
-- 
2.30.2