Re: [U-Boot] [RFC PATCH 1/3] at91: add new gpio pin macros

Am 30.10.2013 11:39, schrieb Andreas Bießmann:

Hi Bo,

+Jens, he did the rewrite of the at91 gpio driver.

I think this is a job for gpio_is_valid() then. How is this case handled in kernel?

Here are a few things to discuss. First of all I'd like to get some insights why the at91 gpio API was changed back in 2010. It was a plain number before and was changed to PORT + PIN as two separate parameters. Jens, could you please shed some light on this?

Sorry, but I don't remember me why we do this. I think, it was a compromise between number of changes and code size.

Regards

Jens