Hi Daniel, On Tuesday, November 3rd, 2026 at 4:05 PM, Daniel Thompson <[email protected]> wrote:
> On Mon, Nov 02, 2026 at 09:58:48PM +0200, Roman Vivchar via B4 Relay wrote: > > From: Roman Vivchar <[email protected]> > > > > 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 <[email protected]> > > --- > > .../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 <[email protected]> > > + > > +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. >
