linux-kernel - [PATCH v5 2/3] dt-bindings: leds: issi,is31fl3236: add support for is31fl3236a

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Message-Id: <20250721-leds-is31fl3236a-v5-2-264e841f4da9@thegoodpenguin.co.uk>
Date: Mon, 21 Jul 2025 11:55:35 +0100
From: Pawel Zalewski <pzalewski@...goodpenguin.co.uk>
To: Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Pavel Machek <pavel@....cz>, devicetree@...r.kernel.org, 
 Pawel Zalewski <pzalewski@...goodpenguin.co.uk>
Subject: [PATCH v5 2/3] dt-bindings: leds: issi,is31fl3236: add support for
 is31fl3236a

Add an additional and optional control property for setting
the output PWM frequency to 22kHz that exists on is31fl3236a.
The default is 3kHz and this option puts the operational frequency
outside of the audible range.

Signed-off-by: Pawel Zalewski <pzalewski@...goodpenguin.co.uk>
---
 .../devicetree/bindings/leds/issi,is31fl3236.yaml  | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/issi,is31fl3236.yaml b/Documentation/devicetree/bindings/leds/issi,is31fl3236.yaml
index d8164876611f5e629215fe2715ebff1745f93a26..58f5aa4d0b644fe550e2c48b141c41c37fdf98e9 100644
--- a/Documentation/devicetree/bindings/leds/issi,is31fl3236.yaml
+++ b/Documentation/devicetree/bindings/leds/issi,is31fl3236.yaml
@@ -17,6 +17,7 @@ description: |
 
   For more product information please see the links below:
     https://www.lumissil.com/assets/pdf/core/IS31FL3236_DS.pdf
+    https://www.lumissil.com/assets/pdf/core/IS31FL3236A_DS.pdf
     https://www.lumissil.com/assets/pdf/core/IS31FL3235_DS.pdf
     https://www.lumissil.com/assets/pdf/core/IS31FL3218_DS.pdf
     https://www.lumissil.com/assets/pdf/core/IS31FL3216_DS.pdf
@@ -25,6 +26,7 @@ properties:
   compatible:
     enum:
       - issi,is31fl3236
+      - issi,is31fl3236a
       - issi,is31fl3235
       - issi,is31fl3218
       - issi,is31fl3216
@@ -40,6 +42,12 @@ properties:
   "#size-cells":
     const: 0
 
+  issi,22kHz-pwm:
+    type: boolean
+    description:
+      When present, the chip's PWM will operate at ~22kHz as opposed
+      to ~3kHz to move the operating frequency out of the audible range.
+
 patternProperties:
   "^led@[1-9a-f][0-9a-f]*$":
     type: object
@@ -56,6 +64,22 @@ patternProperties:
     required:
       - reg
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - issi,is31fl3236
+              - issi,is31fl3235
+              - issi,is31fl3218
+              - issi,is31fl3216
+              - si-en,sn3218
+              - si-en,sn3216
+    then:
+      properties:
+        issi,22kHz-pwm: false
+
 required:
   - compatible
   - reg

-- 
2.48.1