* Stephen Warren <[email protected]> [130211 12:57]: > On 02/10/2013 01:11 PM, Linus Walleij wrote: > > From: Laurent Meunier <[email protected]> > > > > This update adds a debugfs interface to modify a pin configuration > > for a given state in the pinctrl map. This allows to modify the > > configuration for a non-active state, typically sleep state. > > This configuration is not applied right away, but only when the state > > will be entered. > > > > This solution is mandated for us by HW validation: in order > > to test and verify several pin configurations during sleep without > > recompiling the software. > > I never understood why HW engineers can't just recompile the kernel. > Besides, it's just a device tree change these days - no recompile even > required, right?
Typically when bringing up a new board you do not have the driver specific mux settings verified. For developers, it's easiest to tweak the muxing during runtime do the drivers as a loadable module, then export the verified mux configuration into a .dts file. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
