[Buildroot] updating the beaglebone black defconfig
Chris LaRocque
clarocq at gmail.com
Thu Dec 31 23:51:12 UTC 2015
Craig Swank wrote:
> Hi Chris,
> Have you been able to confirm overlays (and the device-tree) work with
> buildroot and beagleboard/linux?
>
> When 'echo BB-W1-P9.12 > /sys/devices/platform/bone_capemgr/slots' the
> w1-gpio module should get loaded and it doesn't. My overlay works as
> expected on a Robert Nelson debian beagle bone, so the overlay is not
> the problem. He also confirmed that his overlay works with
> beagleboard/linux, so the kernel isn't the problem either.
>
> I'm just curious if you've tried a custom overlay yourself and had
> success.
>
> Craig
>
>
> On Wed, Dec 30, 2015, at 10:34 AM, Chris LaRocque wrote:
>> Hello
>>
>> I'm working to update the beaglebone defconfig to kernel 4.1.13 ti 36
>> branch
>> (github.com/beagleboard/linux).
>>
>> The build works but I want to incorporate a patched version of DTC
>> (github.com/pantoniou/dtc/tree/dt-overlays5) to support the cape manager
>> and
>> device tree overlay changes. At this pont I'd appreciate some guidance.
>>
>> My first thought was to simply patch the buildroot dtc package files to
>> pull
>> from the new location. This looks to be the most direct, probably only
>> requiring that place the file in board/beaglebone/patches/dtc?
>>
>> Second, try to dynamically create a patch for the mainline dtc to the
>> bb.org
>> fork. Haven't thought this through yet. A pointer or two would be
>> appreciated. I thought to use 'git diff'?
>>
>> Regards
>>
>> Chris
>>
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>
>
Hi Craig
Yes, I've built overlays and they work. I've not tried having the driver
auto load though. I always ensured the driver I needed was loaded before I
pushed the overlay to cape manager. FYI You need a patched version of DTC
for the 4.1 kernel. I've got the patch ready for buildroot review and I
should be able to push it up in an hour or so.
C
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