[linux-yocto] Keyboard on Beaglebone Black

[Mehaffey, John]

On Tuesday, June 24, 2014 5:56 AM, Bruce Ashfield wrote:
>On 14-06-24 07:06 AM, Kevin Hao wrote:
>> On Tue, Jun 24, 2014 at 10:34:35AM +0800, Kevin Hao wrote:
>>> On Mon, Jun 23, 2014 at 11:39:57AM -0400, Bruce Ashfield wrote:
>>>> On 14-06-23 02:59 AM, Sven Vos wrote:
>>>>> Hello,
>>>>>
>>>>> I am trying to get a Keyboard working on a Beaglebone Black. But 
>>>>> after building a non-custom core-image-minimal and running it on 
>>>>> the beaglebone black, i saw that the display works, but my keyboard doesnt.
>>>>> I think it has something to do with the USB OTG but i have not a 
>>>>> clue what need to be done to get it work. Does anybody got it working yet?
>>>>
>>>> Kevin has been supporting the yocto BSP for us, so adding him on the 
>>>> cc'.
>>>>
>>>> That being said, I'm not sure if the BBB is in a lab environment for 
>>>> him, and hence no physical USB keyboard to use or test.
>>>
>>> I do have a BBB in hand. I will take a look at this issue.
>>
>> It seems that the usb drivers are built as modules by default. But the 
>> kernel-modules is not installed by default on core-image-minimal image.
>> That's the reason why the usb keyboard can't work. So we have two options:
>>    a) config usb drivers as built-in
>>    b) install the kernel-modules on core-image-minimal
>>
>> I prefer to option (a) since it makes no sense to build them as 
>> modules for a specific BSP. But it seems that many drivers such as 
>> sound, display and usb are configured as modules in beaglebone.cfg. Do 
>> we have any special reason to do so? Should we convert all of them to built-in?
>
>No special reason that I know of. I'm find with converting them to built-in.
>Basic/core functionality is fine to include at all times!

Well, according to the poky ref manual:
* core-image-minimal: A small image just capable of allowing a device to boot.

* core-image-basic: A console-only image with more full-featured Linux system functionality installed.

The USB subsystem is huge, and most of it is modules, for good reason.

Perhaps Sven should be building core-image-basic?

John Mehaffey