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    SubjectRe: [PATCH RFC 4/6] net: rfkill: gpio: add device tree support
    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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