[Gta04-owner] GTA04-Kernel 3.17.0

Lukas Maerdian luk at slyon.de
Sun Oct 26 13:20:58 CET 2014

Am 26.10.2014 um 12:25 schrieb NeilBrown:
> On Mon, 6 Oct 2014 13:03:39 +0200 "Dr. H. Nikolaus Schaller"
> <hns at goldelico.com> wrote:
>> Hi all,
>> Linus has released the Kernel 3.17.0 tonight and I have upgraded our kernel sources as well.
> It's been a while .... but SUSE declared last week to be "hackweek" for the
> engineer so I combined it with a hackweekend and have been exploring 3.17.
> I started with vanilla 3.17 - which boots and quite a lot works.  A lot has
> changed in the 12 months since I last spent much time on this - thanks for
> all the bits that have been pushed upsteam!
> With a booting 3.17, I started looking for problems and fixing things, partly
> with reference to your kernel, but mostly just hunting around to try to
> understand what was going on.
>> And, we still have not yet fixed all kernel bugs in our GTA04 extensions. Most notably are:
>> * WiFi power management
> I spent about two days on this, mostly beating my head against a brick wall.
> I think I have it mostly working.  There are a couple of unresolved issues
> and I got the driver to hang a couple of times, but in general the power
> management works and I get 6Mb/sec.
> I've also added a proof-of-concept for a new approach to managing devices
> attached via UART.
> I have the bluetooth powering up/down correctly.  I haven't looked at GPS yet
> (ran out of time), but it should be fairly straight forward.
> Strangely the bma150 driver isn't working properly even though it hasn't
> changed.  It always returns zeros.
> I looked at the code and  bma150_set_mode is basically a no-op, so I don't
> know how it ever worked.  But the iio bma180 driver works OK, so I'll use
> that.
> Things that I know don't work include:
>  - gyroscope -- I get a strange i2c error
>  - GSM audio routing
>  - headset detection
>  - camera, FM radio, TV-out .. all things that I have never used.
> I haven't tested the USB port at all as the socket broke off my test board.
> Similarly I haven't looked at charging much, so various enhancement aren't
> present.
> I also haven't measured power usage.
> I'll try sending some of the simple stuff up-stream in the next week or two,
> and hope to find time to get the audio working properly.  Then I'll try it
> on my main phone and see how it goes.
> The code can be found in the "3.17-gta04" branch of my git tree:
>   git://neil.brown.name/gta04
> and
>   http://git.neil.brown.name/?p=gta04.git;a=shortlog;h=refs/heads/3.17-gta04
> it at least, it should appear there soon one the 'git push' completes.

Hi Neil,

looks like you tackled some of our long-standing issues. :) Especially
the proper gpio-keys wakeup handling, WiFi PM and Bluetooth support
should turn out to be very useful for our Replicant port.

Thanks a lot for your effort!

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