Dear Greg Kroah-Hartman, On Mon, 7 Jan 2013 08:48:45 -0800, Greg Kroah-Hartman wrote:
> If you ever add/remove/modify sysfs files, you have to also do the same > for the Documentation/ABI/ files as well, please redo that in this patch > series. Sure. > But, the bigger question is, why is this a kernel driver at all? Can't > you do this from userspace today without any new kernel code? 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. 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. 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
