Dear Greg Kroah-Hartman, On Mon, 7 Jan 2013 09:23:40 -0800, Greg Kroah-Hartman wrote:
> > Indeed, it can be done from userspace since we're just controlling > > GPIOs. Having a kernel driver allows to describe this device in the > > Device Tree, like all other devices, and have it "magically" appear, > > with a convenient user-space interface. > > Ok, that means you want to use the kernel-standard userspace interface > for displays, right? If so, why not use it? I thought we already > supported LCD displays already, isn't there an interface for it? Don't > create random magic sysfs files without really thinking about it. Well, the LCD interface is about outputting pixel into a video memory. Quite different from: echo 6 > /sys/[...]/gpio-7seg.1/value No? > > Not having a kernel driver means that gazillions of applications > > re-invent the same piece of code over and over again, have to hardcode > > the GPIO numbers for a given piece of hardware, while the kernel > > abstract all of this very nicely. > > That sounds like a wonderful use of a userspace library to do this > properly. Much like libusb does, right? > > I still think as this can be done in userspace, it probably should be. Understood. Patches discarded. Thanks, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
