2019年10月6日(日) 13:06 Bjorn Andersson <bjorn@xxxxxxx>: > > On Fri, Oct 4, 2019 at 8:35 AM Akinobu Mita <akinobu.mita@xxxxxxxxx> wrote: > > > > Currently, GPIO LED driver allows the GPIO properties to contain one GPIO > > phandle. This enables to contain more than one GPIO phandle and the > > brightness of the LEDs is proportional to the number of active GPIOs. > > > > Describing multi-level brightness GPIO LED is only supported in DT. It is > > not supported in ACPI and platform data. > > > > This looks interesting. > > I have a half-baked driver for the NXP PCA9956B; which is a 24-channel > LED driver, each channel with brightness control. With these LEDs > mounted in a line (like on my devboard), an interface for setting e.g. > a percentage and have the appropriate number of LEDs light up seems > like an interesting thing to pursue. > > So I think this would be better represented in some more generic form, > perhaps a trigger? I think it's good idea to create a generalized multiple LED driver. The device consists of multiple LED devices by different drivers and can be used as a single LED device. Although there is a lot more work to do than this LED GPIO enhancement.
