[GIT PULL] omap changes for v2.6.39 merge window

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Apr 1 22:59:02 EDT 2011

On Fri, Apr 01, 2011 at 03:54:47PM -0400, Nicolas Pitre wrote:

> 1) GPIO drivers

>    As Linus observed, in the majority of the cases GPIOs are accessed 
>    through simple memory-mapped registers.  Some have absolute state 
>    registers, the others have separate clear/set registers.  Suffice to 
>    create two generic GPIO drivers each covering those two common cases, 
>    and those generic drivers would simply register with the higher level 
>    gpiolib code, and all the board code would have to do is to provide 
>    the data for those GPIOs (register offsets, number of GPIOs, etc.).  
>    Whether this data eventually comes from DT is an orthogonal issue.

For this case we actually already have the basic_mmio_gpio driver in
tree, we should be pushing for wider usage of that.

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