On Mar 1, 2018 3:46 AM, "Jacek Radzikowski" <jacek.radzikow...@gmail.com>
wrote:

Hello,

I try to access GPIO on pin P9_12 from python script using Adafruit_GPIO
package, the pin is not available for use. Python script complains about
missing file:

ValueError: Set gpio mode failed, missing file or invalid permissions.

config-pin does not see it either:

$ sudo config-pin P9_12 gpio
P9_12 pinmux file not found!
bash: /sys/devices/platform/ocp/ocp*P9_12_pinmux/state: No such file or
directory
Cannot write pinmux file: /sys/devices/platform/ocp/ocp*P9_12_pinmux/state

What works is exporting GPIO 60 through sys fs, and reading its value from
/sys/class/gpio/gpio60/value

With cape removed python script and config-pin work as expected. According
to the documentation, the cape does not use this GPIO, so it should not be
reserved.


I've been working on this issue these last few weeks, but with embedded
world conference this week I haven't worked on it. I should have more
things lined up starting right before elc portand.

Regards,




Here's output from version.sh:
$ sudo /opt/scripts/tools/version.sh
git:/opt/scripts/:[e307a944e0be0610ff5296e0abe4ad31a6e70daa]
eeprom:[A335BNLTBWA51645BBWG0580]
model:[TI_AM335x_BeagleBone_Black_Wireless]
dogtag:[BeagleBoard.org Debian Image 2017-08-01]
bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot
2017.07-00002-g61c3ee0fb5]:[location: dd MBR]
kernel:[4.14.21-bone-rt-r13]
nodejs:[v4.8.7]
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/
AM335X-PRU-RPROC-4-4-TI-00A0.dtbo]
uboot_overlay_options:[enable_uboot_cape_universal=1]
pkg:[bb-cape-overlays]:[4.4.20180223.0-0rcnee0~jessie+20180223]
pkg:[bb-wl18xx-firmware]:[1.20170829-0rcnee2~jessie+20180104]
pkg:[firmware-ti-connectivity]:[20170823-1rcnee0~jessie+20170830]
groups:[debian : debian adm kmem dialout cdrom floppy audio dip video
plugdev users systemd-journal netdev i2c bluetooth cloud9ide gpio pwm admin
spi tisdk weston-launch xenomai]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1
root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M
net.ifnames=0 quiet]
dmesg | grep pinctrl-single
[    0.889759] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size
568
dmesg | grep gpio-of-helper
[    0.890749] gpio-of-helper ocp:cape-universal: ready
END


Regards,
Jacek.


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