[PATCH v2 2/5] dt-bindings: leds: leds-is31fl32xx: add support for is31fl3236a

Jun Yan
2026-04-28T02:34:21Z

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.

Co-developed-by: Pawel Zalewski <pzalewski@thegoodpenguin.co.uk>
Signed-off-by: Pawel Zalewski <pzalewski@thegoodpenguin.co.uk>
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
---
.../bindings/leds/issl,is31fl32xx.yaml | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/issl,is31fl32xx.yaml b/Documentation/devicetree/bindings/leds/issl,is31fl32xx.yaml
index cb4741dee12e..25ce67940c88 100644
--- a/Documentation/devicetree/bindings/leds/issl,is31fl32xx.yaml
+++ b/Documentation/devicetree/bindings/leds/issl,is31fl32xx.yaml
@@ -21,6 +21,7 @@ description: |
https://www.lumissil.com/assets/pdf/core/IS31FL3218_DS.pdf
https://www.lumissil.com/assets/pdf/core/IS31FL3235_DS.pdf
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/IS31FL3293_DS.pdf

properties:
@@ -30,6 +31,7 @@ properties:
- issi,is31fl3218
- issi,is31fl3235
- issi,is31fl3236
+ - issi,is31fl3236a
- issi,is31fl3293
- si-en,sn3216
- si-en,sn3218
@@ -37,6 +39,12 @@ properties:
reg:
maxItems: 1

+ 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.
+
"#address-cells":
const: 1

@@ -60,6 +68,22 @@ patternProperties:
- reg

allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - issi,is31fl3216
+ - issi,is31fl3218
+ - issi,is31fl3235
+ - issi,is31fl3236
+ - issi,is31fl3293
+ - si-en,sn3216
+ - si-en,sn3218
+ then:
+ properties:
+ issi,22khz-pwm: false
+
- if:
properties:
compatible:
@@ -116,6 +140,7 @@ allOf:
contains:
enum:
- issi,is31fl3236
+ - issi,is31fl3236a
then:
patternProperties:
"^led@([1-9])+$":
--
2.53.0