[Buildroot] updating the beaglebone black defconfig

[Buildroot] updating the beaglebone black defconfig

[Chris LaRocque]

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

[Buildroot] updating the beaglebone black defconfig

[Craig Swank]

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
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot


-- 
  Craig Swank
  craigswank at fastmail.fm

[Buildroot] updating the beaglebone black defconfig

[Chris LaRocque]

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
>> 
>> _______________________________________________
>> buildroot mailing list
>> 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

[Buildroot] updating the beaglebone black defconfig

[Craig Swank]

Even when I load the module before the overlay the 1 wire device doesn?t
appear on the filesystem where it should.  The dtc used to compile it is
from Robert Nelson and I?ve used the compiled dtbo on a debian system
and it works, so dtc is definitely not the problem.  

The kernel isn?t the problem either because Nelson was able to use the
same tag of beagleboard/linux and the same overlay I?m using.

Perhaps it has something to do with the boot environment somehow.  I?m
no expert in this, but it seems the debian based installs that work use
initramfs when they boot.  That is the major difference I can see
between the working and non working cases.



On Thu, Dec 31, 2015, at 03:51 PM, Chris LaRocque wrote:
> 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
> >> 
> >> _______________________________________________
> >> buildroot mailing list
> >> 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
> 
> 
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot


-- 
  Craig Swank
  craigswank at fastmail.fm