On Thu, Nov 16, 2023 at 11:53:18AM +0100, Flavio Suligoi wrote: > The two properties: > > - max-brightness > - default brightness > > are not really required, so they can be removed from the "required" > section. > The "max-brightness" is no longer used in the current version > of the driver (it was used only in the first version). > The "default-brightness", if omitted in the DT, is managed by the > device driver, using a default value. This value depends on the dimming > mode used: > > - for the "analog mode", via I2C commands, this value is fixed by > hardware (=31) > - while in case of pwm mode the default used is the last value of the > brightness-levels array. > > Also the brightness-levels array is not required: > > - in "analog mode", via I2C commands, the brightness-level array is > fixed by hardware (0..31).; > - in pwm dimming mode, the driver uses a default array of 0..255 and > the "default-brightness" is the last one, which is "255" > > NOTE: there are no compatibility problems with the previous version, > since the device driver has not yet been included in any kernel. > Only this dt-binding yaml file is already included in the current > v6.7.0-rc1 kernel version. > No developer may have used it. > > Other changes: > > - improve the backlight working mode description, in the "description" > section > - update the example, removing the "max-brightness" and introducing the > "brightess-levels" property > > Signed-off-by: Flavio Suligoi <f.suligoi@xxxxxxx> > Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx> Daniel.
