[PATCH] dt-bindings: leds: Describe optional 'reg' property used for Qualcomm LPG nodes

[Bhupesh Sharma]

As Bjorn noted in [1], it is useful to describe the optional
'reg' property for Qualcomm LPG nodes as it is used in
some Qualcomm dts files.

This fixes the following 'make dtbs_check' error reported for
pm8350c & sc8280xp pwm nodes:

arch/arm64/boot/dts/qcom/sc7280-herobrine-herobrine-r1.dtb:
 pwm@e800: 'reg' does not match any of the regexes:
 '^led@[0-9a-f]$', 'pinctrl-[0-9]+'

[1]. https://lore.kernel.org/linux-arm-msm/Ytg3tIaL5h5b9ewH@xxxxxxxxxxx/

Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Cc: robh@xxxxxxxxxx
Cc: pavel@xxxxxx
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
index fe336fa16518..f394ab7a757b 100644
--- a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
@@ -27,6 +27,9 @@ properties:
       - qcom,pmi8994-lpg
       - qcom,pmi8998-lpg
 
+  reg:
+    maxItems: 1
+
   "#pwm-cells":
     const: 2
 
-- 
2.35.3