On 07/31/2014 03:58 PM, Simon Glass wrote:
On 31 July 2014 10:56, Simon Glass sjg@chromium.org wrote:
...
Firstly we need to establish that GPIOs have names and that these should be supported in U-Boot. Without agreement on this point we might not get much further.
Can I please press you on this point, as it is important to establish this first.
Oh, you were talking about agreeing with me? I thought this was more of a general comment, since you'd indicated earlier that amending the gpio to handle names was outside the scope of this patchset, and GPIO names are basically only relevant if the user-interface exposes/handles the names.
Well sure, GPIOs obviously have various sets of (controller-relative) names and IDs.
There certainly aren't any "global" or "absolute" names though, unless you include the controller name/ID (or something derived from it) as part of the GPIO's name/ID (either numerically via controller base IDs or textually by e.g. prefixing GPIO names with the controller name).
It would be good for any user-visible command/script to be able to handle either numeric IDs (either in an absolute space or preferably relative to a specified controller) or names.