[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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>> buildroot at busybox.net
>> http://lists.busybox.net/mailman/listinfo/buildroot
> 
> 
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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