Re: [PATCH 1/2] dt-bindings: leds: register-bit-led: Add value property

From: Pali Rohár
Date: Wed Jul 06 2022 - 12:23:44 EST


On Wednesday 06 July 2022 10:21:11 Rob Herring wrote:
> On Wed, Jul 06, 2022 at 01:28:27PM +0200, Pali Rohár wrote:
> > Allow to define inverted logic (0 - enable LED, 1 - disable LED) via value
> > property. This property name is already used by other syscon drivers, e.g.
> > syscon-reboot.
>
> Yes, but those are potentially multi-bit values. This is a single bit
> value, and the only value that's ever needed is 0. Why not just use
> 'active-low' here?

Just because to have uniform definitions across more syscon nodes.

> >
> > Signed-off-by: Pali Rohár <pali@xxxxxxxxxx>
> > ---
> > .../devicetree/bindings/leds/register-bit-led.yaml | 11 +++++++++++
> > 1 file changed, 11 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/leds/register-bit-led.yaml b/Documentation/devicetree/bindings/leds/register-bit-led.yaml
> > index 79b8fc0f9d23..d6054a3f9087 100644
> > --- a/Documentation/devicetree/bindings/leds/register-bit-led.yaml
> > +++ b/Documentation/devicetree/bindings/leds/register-bit-led.yaml
> > @@ -43,6 +43,17 @@ properties:
> > 0x100000, 0x200000, 0x400000, 0x800000, 0x1000000, 0x2000000, 0x4000000,
> > 0x8000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000 ]
> >
> > + value:
> > + description:
> > + bit value of ON state for the bit controlling this LED in the register
> > + when not specified it is same as the mask
> > + $ref: /schemas/types.yaml#/definitions/uint32
> > + enum:
> > + [ 0x0, 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x100, 0x200, 0x400, 0x800,
> > + 0x1000, 0x2000, 0x4000, 0x8000, 0x10000, 0x20000, 0x40000, 0x80000,
> > + 0x100000, 0x200000, 0x400000, 0x800000, 0x1000000, 0x2000000, 0x4000000,
> > + 0x8000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000 ]
> > +
> > offset:
> > description:
> > register offset to the register controlling this LED
> > --
> > 2.20.1
> >
> >