[Buildroot] new TI kernel version for beaglebone black

[Dan Pattison <dan.pattison@ethertek.ca>]

On 5/31/2014 9:38 AM, Hadrien Boutteville wrote:
> Dan,
>
> On Sat, 31 May 2014 08:42:28 -0700, Dan Pattison wrote:
>> On 5/31/2014 5:40 AM, Hadrien Boutteville wrote:
>>> Hello Dan,
>>>
>>> On Fri, 30 May 2014 14:18:26 -0700, Dan Pattison wrote:
>>>> I have a question that is probably not 100% buildroot related, but was
>>>> hoping to get some help. I am using buildroot to build a kernel and
>>>> rootFS for a beaglebone black. Buildroot is awesome and builds
>>>> everything fine. The board boots up and all packages work properly.
>>>> Unfortunately, USB seems to be badly broken. In the kernel I have USB
>>>> driver enabled and USB Announce New Devices turned on. Googling around I
>>>> find several people with the same problem, hotplug does not work at all,
>>>> and no device I have tried shows up in dmesg or lsusb on cold or warm
>>>> boot. A band aid is to use a powered USB hub (have not tried that). Some
>>>> guys on the beagleboard.org IRC say to try a newer kernel version (3.14
>>>> or >) because beaglebone USB is fixed in newer kernel versions. Current
>>>> buildroot beaglebone black kernel version is 3.12.10
>>>>
>>>> In buildroot I used make beaglebone_defconfig.
>>>> Under the Kernel menu, Custom Git repository is selected.
>>>> The git URL is https://git.ti.com/ti-linux-kernel/ti-linux-kernel.git
>>>> The custom repository version is 7f280334068b7c875ade51f8f3921ab311f0c824
>>>> The def config is board/beaglebone/linux-3.12.config
>>> I'm using the default beaglebone_defconfig on BBB and USB hotplug works
>>> fine. In the default kernel config the options are selected as modules,
>>> so you have to load them:
>>>
>>>     $ modprobe musb_am335x
>>>     $ modprobe musb_dsps
>>>
>>> After that, outputs in dmesg will tell you that the USB port is found
>>> (short version) and USB hotplug will work (I just tested).
>>>
>>> Regards,
>>>
>>> Hadrien
>>>
>> Hello Hadrien,
>>
>> Thanks for the help. I had the drivers compiled into he kernel not as
>> modules. When I reverted my changes back to module and added depmod to
>> busybox, then things started to happen. Again, thanks for the help.
> >From what you said I understood that you were using the default kernel
> config in beaglebone_defconfig almost unchanged ;-).
>
> Well, I'm using the drivers compiled into the kernel and it works fine
> too. Make sure you selected those options in your kernel config:
>
>    USB_MUSB_DUAL_ROLE=y
>    USB_MUSB_HDRC=y
>    USB_MUSB_DSPS=y
>    USB_MUSB_AM335X_CHILD=y
>
> Regards,
>
> Hadrien
>
Hi Hadrien,

Again you are correct. I think I had the wrong glue layer selected. It 
all works now with the driver compiled into the kernel.

Thanks, you rock!

Dan Pattison
Ethertek Circuits