On Wed, Oct 23, 2013 at 8:58 AM, porkupan <[email protected]> wrote: > Thanks, I understand. Turns out what I needed could have been accomplished > without rebuilding U-Boot. I had to set the value of a GPIO line, and there > is a U-Boot script command for that. > > So, a re-built U-Boot wouldn't have produced any benefit. > > However, I need to figure out how to force this GPIO to stay LOW during > kernel startup. Apparently the kernel switches it HIGH (or affects some > sort of a reset that forces GPIO_137 high). So, the GPIO line is switched > down via "gpio clear 137" U-Boot command, but a couple of seconds later > comes back up, and stays up until the user software can be brought up to > switch it off. It seems that most interactions with the registers, > including setting GPIO levels, can be achieved via the DTS? I see some > examples for BBB, but haven't found anything for the xM.
Well gpio_137 is not touched on mainline: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/omap3-beagle-xm.dts Regards, -- Robert Nelson http://www.rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
