Re: [beagleboard] Re: Prevent linux from clearing GPIO pins during boot
On Fri, Dec 27, 2013 at 4:45 AM, Ives van der Flaas ives@gmail.com wrote: Some more information: I'm running the BeagleBone Black with a 3.8.13-bone33 kernel. Adding the HWMOD_INIT_NO_RESET flag to gpio0 and gpio1 structs in arch/arm/mach-omap2/omap_hwmod_33xx_data.c similar to [1] should work. [1]https://git.ti.com/~mugunthanvnm/ti-linux-kernel/mugunth-connectivity-linux-feature-tree/commit/e43edd44fd2174cdabd459c1d97c7f0d512d1b04 -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[beagleboard] Re: Prevent linux from clearing GPIO pins during boot
Some more information: I'm running the BeagleBone Black with a 3.8.13-bone33 kernel. Op donderdag 26 december 2013 09:42:12 UTC+1 schreef Ives van der Flaas: I have two GPIO pins that I'd like to be high during the boot process. These pins, GPIO 44 and 23, are connected to LEDs through some circuitry. I've managed to set those pins when uBoot runs, but they are reset during the boot process: as soon as the linux kernel starts these pins are pulled low. After linux finishes booting I install a device tree overlay and can resume control of the pins. How can I prevent these pins from being cleared? Is this done by the linux kernel itself or some driver? How do I start looking for the code responsible? (I also posted this question 3 days ago but it hasn't appeared in the relevant group). -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
