Im.not sure I understand. I am setting the pins in the dts file i pasted.
Wrting 0x37 to them to set them as inputs with pullups. I then compile a
dtbo, load then load the dtbo. It gets loaded. I check the pins and they
are not 0x37. Could you explain again what did you mean exacly? I wanted to
simply init the pin with device tree overlay and then manage it with sysfs.
On September 10, 2015 3:34:44 PM Charles Steinkuehler
<[email protected]> wrote:
On 9/9/2015 11:41 AM, bremenpl wrote:
Hello there,
I just got back to my BeagleBone Black and i have no idea why but I just
cannot change a pin configuration using overlay nor through export. This is
what I am trying to do:
I want to set P8_29 and P8_31 Pins to inputs with a pullup (0x37). here is
my overlay:
<snip overlay stuff>
Then I check the pins and they remain as they were in default:
root@beaglebone:~# cat $PINS | grep "pin 57"
pin 57 (44e108e4) 00000027 pinctrl-single
root@beaglebone:~# cat $PINS | grep "pin 54"
pin 54 (44e108d8) 0000002f pinctrl-single
Did I forget something? I really cant think of anything. I would really
apreciate all help here!
Well, since you're using gpio-of-helper (designed to allow export of
GPIO pins via the device tree instead of using sysfs), but *NOT*
actually defining any GPIO pins, I'm not sure the gpio-of-helper
driver is applying your pinmux settings.
Try adding the GPIO pins you want to the gpio_helper stanza in
fragment 1 and configure them as inputs.
--
Charles Steinkuehler
[email protected]
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