Re: [PATCH 1/3] dt-bindings: leds: rt8515: Support single-GPIO flash ICs with unlock gate

Linus Walleij
2026-03-08T23:20:44Z

Hi Rudraksha,

thanks for your patch!

On Sat, Mar 7, 2026 at 1:58 AM Rudraksha Gupta via B4 Relay
<devnull+guptarud.gmail.com@kernel.org> wrote:

> ent-gpios:
> maxItems: 1
> description: A connection to the 'ENT' (enable torch) pin.
> + Optional for single-GPIO flash ICs where enf-gpios is used for
> + both flash and torch modes.

Fair enough, that can be done.

> + unlock-gpios:
> + maxItems: 1
> + description: Optional GPIO to unlock the flash LED circuit. Some
> + boards use a PMIC MPP pin that must be driven high before the
> + flash IC will respond to the enable GPIOs.

But this IC has no pin named "unlock". This is something else.

Given the way it works it looks like a regulator enable signal.

If you don't have any better idea about what this is, I would
suggest adding

vin-supply

to the RT8615 bindings instead and then use a GPIO regulator
in your device tree to provide the voltage to it from that GPIO.

Yours,
Linus Walleij