Am Montag, den 10.01.2011, 11:28 -0500 schrieb Mike Frysinger:
On Mon, Jan 10, 2011 at 10:59 AM, Andreas Pretzsch wrote:
As your code already uses the Linux GPIO conventions and naming (without the gpio_chip stuff, which is not necessary for a bootloader IMHO), it'd be a solid base for that.
Mr. Denk, are there any plans for a generic GPIO layer in U-Boot ?
if we arent supporting gpio_chips, then there really isnt much need for common GPIO code. there is already a generic GPIO layer in U-Boot just like in Linux -- include asm/gpio.h and use the normal gpio_xxx set of functions.
Well, partly. True for Blackfin and a few ARM/AVR32/NIOS2, albeit the latter have a mixture of specific names like at91_get_gpio_value(), pin_to_controller(), kw_gpio_get_value(), etc.
Therefore unifying them to common names and syntax would be the first step. Of course, the gpio_chip approach of Linux is the cleaner way, adding only a few extra bytes of code/ram. I'm fine with both. As time permits, I'm willing to help here.