On 2011/03/28 11:08 AM, Mike Frysinger wrote:
On Mon, Mar 28, 2011 at 4:57 AM, Rogan Dawes wrote:
I'm wondering if there is any support in u-boot for reading the state of a GPIO input (i.e. button) to control the sequence of boot events?
i.e. my board has a reset button, can I read its state to determine whether to try to TFTP-boot a new kernel, or to boot the existing one in flash?
I did try to grep the sources for any hints, but did not find anything. I may have been looking in the wrong place, of course!
i plan on generalizing arch/blackfin/cpu/cmd_gpio.c for all arches in this next cycle (it is mostly done). but that would require your arch to support the generic gpio layer. -mike
Cool, thanks for the answer, Mike!
I'll wait to see what you do, and whatever needs to be done for my arch/board.
Rogan