On Mon, Jan 16, 2023 at 09:59:58AM +0200, Tony Lindgren wrote: > We want to enable runtime PM for serial port device drivers in a generic > way. To do this, we want to have the serial core layer manage the > registered physical serial controller devices. > > To do this, let's set up a struct device for the serial core controller > as suggested by Greg and Jiri. The serial core controller devices are > children of the physical serial port device. The serial core controller > device is needed to support multiple different kind of ports connected > to single physical serial port device. > > Let's also set up a struct device for the serial core port. The serial > core port instances are children of the serial core controller device. Looking better, but why is this new device a platform device? That feels odd, you should never have a platform device hanging off of a non-platform device, right? What does the sysfs tree look like now with this patch applied? thanks, greg k-h
