Cannot set value of GPIO[5]

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1

I’ve loaded a DeviceTree overlay to mux GPIO[4] and GPIO[5] to p9[18] and p9[17] respectively:

DTS file:

0x15C 0x07 /* P9_17 gpio[5] OUTPUT MODE7 - The LED Output /
0x158 0x07 / P9_18 gpio[4] OUTPUT MODE7 - The LED Output */

Compiled and loaded:

root@bbbA:/sys/class/gpio/gpio5# cat $SLOTS
0: 54:PF—
1: 55:PF—
2: 56:PF—
3: 57:PF—
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
9: ff:P-O-L Override Board Name,00A0,Override Manuf,JB-GPIO-DEMO

I can control GPIO[4] just fine, but GPIO[5] refuses to budge:

root@bbbA:/sys/class/gpio# echo 5 >export
root@bbbA:/sys/class/gpio# cd gpio5
root@bbbA:/sys/class/gpio/gpio5# cat direction
out
root@bbbA:/sys/class/gpio/gpio5# cat value
0
root@bbbA:/sys/class/gpio/gpio5# echo 1 >value
root@bbbA:/sys/class/gpio/gpio5# cat value
0
root@bbbA:/sys/class/gpio/gpio5#

Any ideas??

2

And I have confirmed the pins are properly overlaid:

pin 84 (44e10950): (MUX UNCLAIMED) (GPIO UNCLAIMED)

pin 85 (44e10954): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 86 (44e10958): helper.14 (GPIO UNCLAIMED) function JB_GPIO_Demo_Pins group JB_GPIO_Demo_Pins
pin 87 (44e1095c): helper.14 (GPIO UNCLAIMED) function JB_GPIO_Demo_Pins group JB_GPIO_Demo_Pins
pin 88 (44e10960): (MUX UNCLAIMED) (GPIO UNCLAIMED)
pin 89 (44e10964): (MUX UNCLAIMED) (GPIO UNCLAIMED)

3

Did you ever get this to work? I’m having what I think is the exact same problem… I can control other pins easily, such as GPIO0 2,3,14,and 15 but GPIO0_4/5 don’t show output changes when exported and set.

Regards,
Hunter