Hello all,

recently a patch for soft-i2c has been accepted that uses gpio_* functions. Supposedly they are generic, but grep-ing shows that such functions only exist in the nios2 architecture.

Every architecture seems to have their own similiar but not identical way for gpio access. At91 even has two ways where the IMHO better way is depreciated...

The better way IMHO is when Port and Bit are together in one parameter.

I also like the possibility of some solutions to 'request' a pin.

So, before potentially reworking the at91 solution(s), I'd like to have some input/insight if there is a tendency towards a generalization across all architectures?

Ideally, that could start with introducing a "gpio.h" header file outside an architecture specific path.

Naturally, the multitude of designs of GPIO ports might make it difficult to unify the access functions...

Reinhard