Re: [PATCH 2/3] dt-bindings: leds: add dt schema for worldsemi,ws2812b-spi

[Chuanhong Guo]

Hi!

On Wed, Nov 30, 2022 at 4:33 PM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
> >> What controls the intensity? Don't you have PWM there?
> >
> > WS2812 is a RGB led, which contains a small Microcontroller. The µC
> > takes 24 byte intensity data from a serial input and then passes on
> > any following bits to the next LED. SPI clk and chip-select are
> > ignored (chip-select support can be trivially added though).
> >
> > You can find them everywhere nowadays, since they are quite cheap
> > (a few cents per LED) and need only one MOSI pin to control hundreds
> > of LEDs.
>
> OK. This should be anyway existing property, so default-brightness.

default-intensity is a different property. Intensity controls only the
color for a multicolor led. The final brightness is calculated with
this intensity value with the single brightness value of the current
LED. (See my previous mail.)

-- 
Regards,
Chuanhong Guo