Hi Daniel,
On Tuesday, November 3rd, 2026 at 4:05 PM, Daniel Thompson [off-list ref] wrote:
On Mon, Nov 02, 2026 at 09:58:48PM +0200, Roman Vivchar via B4 Relay wrote:
quoted
From: Roman Vivchar <rva333@protonmail.com>
Kinetic KTD3137 is an LED IC, used in various mobile devices for the
display backlight. Add devicetree bindings documentation for this chip.
Datasheet: https://www.kinet-ic.com/uploads/KTD3137-04a.pdf
Signed-off-by: Roman Vivchar <rva333@protonmail.com>
---
.../bindings/leds/backlight/kinetic,ktd3137.yaml | 64 ++++++++++++++++++++++
MAINTAINERS | 5 ++
2 files changed, 69 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd3137.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd3137.yaml
new file mode 100644
index 000000000000..140615640a9a
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd3137.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd3137.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Kinetic Technologies KTD3137 LED Backlight
+
+maintainers:
+ - Roman Vivchar <rva333@protonmail.com>
+
+description:
+ The Kinetic Technologies KTD3137 is an I2C LED backlight driver for medium
+ to large size LCD panels.
<snip>
+ led-max-microamp:
+ minimum: 5000
+ maximum: 29800
+ default: 20200
+
+ vin-supply: true
+
+required:
+ - compatible
+ - reg
+ - vin-supply
Why is vin-supply required?
The chip cannot function without VIN power supply. Even if it's on the
always-on power rail on certain board, there's always a chance it might be
accidentally left disabled on the other. It's better to document supply in
the bindings as far as I understand.
Best regards,
Roman
Daniel.