On Tue, Jan 18, 2011 at 04:43:33PM -0800, Colin Cross wrote:

On Tue, Jan 18, 2011 at 4:29 PM, Stephen Warren swarren@nvidia.com wrote:

...

I'll go read up on gpiolib some more to see how those API-level numbers get mapped to a specific controller and GPIO number.

They usually come in through platform data from the board file. See Olof's recent Tegra sdhci patches for an example. Tegra GPIO names are defined in arch/arm/mach-tegra/gpio-names.h.

Yup, and gpiolib also supports automatic assignment of numbers if you specify -1 as the base number though that's a lot less useful within the kernel.