On Tue, Jan 21, 2014 at 07:50:06PM +0100, Arnd Bergmann wrote: > I should have another look at the debugfs representation, but isn't > there a global namespace that gets used for all gpios? Neither the > con_id nor the name that the driver picks would be globally unique > and stable across kernel versions, so they don't make a good user > interface. Currently the globally unique name is the GPIO number but that's not stable since it gets dynamically assigned. > I think what we want here is a system-wide unique identifier for > each gpio line that may get represented in debugfs, and use a new > DT mechanism to communicate that. We've mostly been using things based off dev_name() for stability.
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