usb gadgets not working on mx28 after updating to mainline kernel

[LarsChristensen]

Previously I've used ltib and kernel 2.6.35 with g_ether running fine.

After I downloaded kernel 3.7.0

make mxs_defconfig

make menuconfig (enable usb ethernet gadget)

make -j4 uImage modules

make INSTALL_MOD_PATH=$ROOTFSDIR modules_install (using rootfs generated by ltib)

When running modprobe g_ether on target with my new kernel i get the following message:

modprobe: failed to load module g_ether (/lib/modules/3.7.0-04111-g9977d9b-dirty/kernel/drivers/usb/gadget/g_ether.ko): No such device

I get the same result if i insmod /lib/modules/.../g_ether.ko

Am I missing a step?

Cheers,

Lars

[fabio_estevam]

I sent a patch to allow USB peripheral to work on mx28evk:

https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/arm/boot/dts/imx28-evk....

This will reach mainline kernel in 3.12-rc1, but you can use it currently in linux-next tree.

Regards,

Fabio Estevam

[lategoodbye]

Initial USB OTG support for i.MX28 should be in mainline Kernel 3.11-rc1 ( https://community.nxp.com/" name="bugnotes" title="https://community.freescale.com/driver: ChipIdea Highspeed Dual Role Controller ).

[x10]

Kernel 3.9.7 is used in my imx28 based board. Is it possible to move some code from 3.11 to 3.9.7, as quite a lot modifications made in this version.

BR

Cheng Shi

[lategoodbye]

Hi Cheng,

i'm using Kernel 3.10 and ported this feature back. There is a quick and dirty way: copy all files from drivers/usb/chipidea + include/linux/usb/chipidea.h from Kernel 3.11.

Hope this helps.

Best regards

Stefan Wahren

Edit: Sorry, i forgot to mention that the Patch "Add tested id switch and vbus connect detect support for Chipidea" in Version 14 or higher also needs to applied.

http://permalink.gmane.org/gmane.linux.usb.general/91626

[fabio_estevam · Accepted solution]

Lars,

Only USB host is currently supported in the mainline kernel. USB OTG is work in progress though and patches have been already sent to the linux-usb mailing list.

Regards,

Fabio Estevam