BBB enable i2c2 on chipsee debian 3.8.13 kernel

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1

hi! i need some help to enable pins P9 19,20 to use i2c2 with te precompiled kernel of chipsee screen.I dont found the cape manager:

/sys/devices/bone_capemgr.8/slots: No such file or directory

thanks!

2

The people who designed the chipsee cape messed up... They have a can
phy connected to those i2c pins needed for cape-manager..

Use any of the v4.x kernels where both the chipsee r/c are fully supported:

dtb=am335x-boneblack-bbb-exp-r.dtb
dtb=am335x-boneblack-bbb-exp-c.dtb

Regards,

3

thank robert!

i install this image

[https://rcn-ee.com/rootfs/bb.org/testing/2016-02-21/lxqt-4gb/bone-debian-8.3-lxqt-4gb-armhf-2016-02-21-4gb.img.xz](https://rcn-ee.com/rootfs/bb.org/testing/2016-02-21/lxqt-4gb/bone-debian-8.3-lxqt-4gb-armhf-2016-02-21-4gb.img.xz)

update & upgrade

git clone https://github.com/beagleboard/bb.org-overlays
cd ./bb.org-overlays
./dtc-overlay.sh
./install.sh

dtc --version
Version: DTC 1.4.1-g1e75ebc9

but dont have this files…
/sys/devices/bone_capemgr.8/slots

/sys/devices/platform/bone_capemgr/slots

i try to enable with cape_enable=bone_capemgr.enable_partno=BB-I2C2
but it does not work.

any idea?

uname -a
Linux beaglebone 4.1.18-ti-r49

ls -l /sys/bus/i2c/devices/i2c-*
lrwxrwxrwx 1 root root 0 Mar  1 06:10 /sys/bus/i2c/devices/i2c-0 -> ../../../devices/platform/ocp/44e0b000.i2c/i2c-0
lrwxrwxrwx 1 root root 0 Mar  1 06:10 /sys/bus/i2c/devices/i2c-1 -> ../../../devices/platform/ocp/4802a000.i2c/i2c-1

thanks for your responses!
4

update:

when i try to configure i2c2 before set up the chipsee screen, this work fine,
the file /sys/devices/platform/bone_capemgr/slots exist.

root@beaglebone:/sys/devices/platform# echo BB-I2C2 >/sys/devices/platform/bone_capemgr/slots
root@beaglebone:/sys/devices/platform# ls -l /sys/bus/i2c/devices/i2c-*
lrwxrwxrwx 1 root root 0 Mar 1 22:55 /sys/bus/i2c/devices/i2c-0 -> ../../../devices/platform/ocp/44e0b000.i2c/i2c-0
lrwxrwxrwx 1 root root 0 Mar 1 23:01 /sys/bus/i2c/devices/i2c-1 -> ../../../devices/platform/ocp/4802a000.i2c/i2c-1
lrwxrwxrwx 1 root root 0 Mar 1 22:55 /sys/bus/i2c/devices/i2c-2 -> ../../../devices/platform/ocp/4819c000.i2c/i2c-2

but when i configure the screen with

sudo nano /boot/uEnv.txt
dtb=am335x-boneblack-bbb-exp-c.dtb

sudo sed -i -e ‘s:16:24:g’ /etc/X11/xorg.conf

and reboot, the slots file disappears.

5 
regreted , I need to compile a soft q did with qt4 with user interface and I2C communication but everything is failing q do , someone could at least give me a guide ?

I'm desperate : c

thank you very much to all!