On 08/06/2023 10:21, Billy Tsai wrote: > On 08/06/2023 09:47, Billy Tsai wrote: > >> > >> >> + > >> >> +allOf: > >> >> + - $ref: pwm.yaml# > >> >> + > >> >> +properties: > >> >> + compatible: > >> >> + enum: > >> >> + - aspeed,ast2600-pwm > >> >> + > >> >> + "#pwm-cells": > >> >> + const: 3 > >> > >> > 3 cells? For one PWM? What are they? > >> > >> channel, period and polarity. > > > Don't cut my responses. You wrote you have one PWM output, so only one > > channel. What do you put then in the channel? > > You need to put 0 in the cell of the channel, the example of the dts usage will like following: If you always put 0 isn't this a proof that it's wrong? Best regards, Krzysztof