[yocto] missing USB gadget support on beagleboard?
Hollis Blanchard
hollis_blanchard at mentor.com
Wed Feb 15 15:20:36 PST 2012
On 02/14/2012 10:24 PM, McClintock Matthew-B29882 wrote:
> On Tue, Feb 14, 2012 at 4:12 PM, Hollis Blanchard
> <hollis_blanchard at mentor.com> wrote:
>> Hi, I'm sure I'm missing something simple, but I just built Poky from git
>> for beagleboard, and can't figure out USB networking. I expected to find
>> g_cdc and g_ether modules in
>> /lib/modules/3.0.18-yocto-standard+/kernel/drivers/usb, but that directory
>> doesn't actually exist (I guess the drivers are built-in to this kernel).
>>
>> I have MACHINE ??= beagleboard in local.conf, and "bitbake
>> core-image-minimal" did produce a working kernel, uboot, etc. I see some USB
>> messages at boot (see below), but although cdc_ether is mentioned, ifconfig
>> -a lists only loopback.
>>
>> Any suggestions? Thanks!
> You can look at the default defconfig to see which kernel modules are
> selected and also make sure the kernel modules are actually included
> on core-image-minimal.
Right, it looks like CONFIG_USB_ETH is disabled in
linux-beagleboard-standard-build/.config , and I think that's the key
missing option. I'm so lost in Yocto's kernel configuration
"architecture" that I have no idea if that's being explicitly disabled,
or just omitted from the base config, or what.
It seems to me that option should be enabled if DISTRO_FEATURES contains
usbgadget. More simply, it seems like a good idea to enable
CONFIG_USB_ETH in the beagleboard default configuration, since many
beagleboards don't have any other network interface.
Is there an owner of Yocto's beagleboard BSP stuff?
Hollis Blanchard
Mentor Graphics, Embedded Systems Division
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