I'm attempting to get the i2c bus to work from a raspberry pi image created from yocto. I have looked at other peoples solutions but they are all o do with raspbian or some other flavour of os.
My /boot/config.txt looks like this:
root@raspberrypi2:~# cat /boot/config.txt dtparam=i2c_arm=on dtparam=i2c_vc=on bcm2708.vc_i2c_override=1 lsmod gives me:
root@raspberrypi2:~# lsmod Not tainted ipv6 340199 18 [permanent], Live 0x7f02c000 i2c_bcm2708 4932 0 - Live 0x7f027000 i2c_dev 5810 0 - Live 0x7f022000 bcm2835_gpiomem 2852 0 - Live 0x7f01e000 uio_pdrv_genirq 2924 0 - Live 0x7f012000 uio 8039 1 uio_pdrv_genirq, Live 0x7f000000 dmesg has the following in it:
root@raspberrypi2:~# cat /var/log/dmesg | grep i2c [ 3.645233] i2c /dev entries driver looking in /proc/device-tree gives me:
root@raspberrypi2:~# find /proc/device-tree/ | grep i2c /proc/device-tree/soc/i2c@7e205000 /proc/device-tree/soc/i2c@7e205000/reg /proc/device-tree/soc/i2c@7e205000/name /proc/device-tree/soc/i2c@7e205000/interrupts /proc/device-tree/soc/i2c@7e205000/pinctrl-0 /proc/device-tree/soc/i2c@7e205000/compatible /proc/device-tree/soc/i2c@7e205000/clock-frequency /proc/device-tree/soc/i2c@7e205000/clocks /proc/device-tree/soc/i2c@7e205000/status /proc/device-tree/soc/i2c@7e205000/#address-cells /proc/device-tree/soc/i2c@7e205000/phandle /proc/device-tree/soc/i2c@7e205000/#size-cells /proc/device-tree/soc/i2c@7e205000/pinctrl-names /proc/device-tree/soc/i2c@7e205000/linux,phandle /proc/device-tree/soc/i2c@7e804000 /proc/device-tree/soc/i2c@7e804000/reg /proc/device-tree/soc/i2c@7e804000/name /proc/device-tree/soc/i2c@7e804000/interrupts /proc/device-tree/soc/i2c@7e804000/pinctrl-0 /proc/device-tree/soc/i2c@7e804000/compatible /proc/device-tree/soc/i2c@7e804000/clock-frequency /proc/device-tree/soc/i2c@7e804000/clocks /proc/device-tree/soc/i2c@7e804000/status /proc/device-tree/soc/i2c@7e804000/#address-cells /proc/device-tree/soc/i2c@7e804000/phandle /proc/device-tree/soc/i2c@7e804000/#size-cells /proc/device-tree/soc/i2c@7e804000/pinctrl-names /proc/device-tree/soc/i2c@7e804000/linux,phandle /proc/device-tree/soc/i2c@7e805000 /proc/device-tree/soc/i2c@7e805000/reg /proc/device-tree/soc/i2c@7e805000/name /proc/device-tree/soc/i2c@7e805000/interrupts /proc/device-tree/soc/i2c@7e805000/compatible /proc/device-tree/soc/i2c@7e805000/clock-frequency /proc/device-tree/soc/i2c@7e805000/clocks /proc/device-tree/soc/i2c@7e805000/status /proc/device-tree/soc/i2c@7e805000/#address-cells /proc/device-tree/soc/i2c@7e805000/phandle /proc/device-tree/soc/i2c@7e805000/#size-cells /proc/device-tree/soc/i2c@7e805000/linux,phandle /proc/device-tree/soc/gpio@7e200000/i2c0 /proc/device-tree/soc/gpio@7e200000/i2c0/name /proc/device-tree/soc/gpio@7e200000/i2c0/phandle /proc/device-tree/soc/gpio@7e200000/i2c0/brcm,function /proc/device-tree/soc/gpio@7e200000/i2c0/brcm,pins /proc/device-tree/soc/gpio@7e200000/i2c0/linux,phandle /proc/device-tree/soc/gpio@7e200000/i2c1 /proc/device-tree/soc/gpio@7e200000/i2c1/name /proc/device-tree/soc/gpio@7e200000/i2c1/phandle /proc/device-tree/soc/gpio@7e200000/i2c1/brcm,function /proc/device-tree/soc/gpio@7e200000/i2c1/brcm,pins /proc/device-tree/soc/gpio@7e200000/i2c1/linux,phandle /proc/device-tree/__symbols__/i2c /proc/device-tree/__symbols__/i2c0 /proc/device-tree/__symbols__/i2c1 /proc/device-tree/__symbols__/i2c2 /proc/device-tree/__symbols__/i2c_arm /proc/device-tree/__symbols__/i2c_vc /proc/device-tree/__symbols__/i2c0_pins /proc/device-tree/__symbols__/i2c1_pins /proc/device-tree/__symbols__/clk_i2c /proc/device-tree/aliases/i2c /proc/device-tree/aliases/i2c0 /proc/device-tree/aliases/i2c1 /proc/device-tree/aliases/i2c2 /proc/device-tree/aliases/i2c_arm /proc/device-tree/aliases/i2c_vc /proc/device-tree/__overrides__/i2c /proc/device-tree/__overrides__/i2c0 /proc/device-tree/__overrides__/i2c1 /proc/device-tree/__overrides__/i2c_arm /proc/device-tree/__overrides__/i2c2_iknowwhatimdoing /proc/device-tree/__overrides__/i2c0_baudrate /proc/device-tree/__overrides__/i2c_vc_baudrate /proc/device-tree/__overrides__/i2c_vc /proc/device-tree/__overrides__/i2c1_baudrate /proc/device-tree/__overrides__/i2c_baudrate /proc/device-tree/__overrides__/i2c2_baudrate /proc/device-tree/__overrides__/i2c_arm_baudrate but if I 'ls /dev/i2*' I get no /dev/i2c devices. I'm expecting /dev/i2c-0 or an equivalent alias, does anyone know what is happening?
