[Gta04-owner] Linux 3.2-rc4 - now with wifi

[Boudewijn]

On Monday 05 December 2011 22:35:24 Klaus 'mrmoku' Kurzmann wrote:
> On Tue, 06 Dec 2011, NeilBrown wrote:
> > On Mon, 5 Dec 2011 17:20:45 +0100 Klaus 'mrmoku' Kurzmann
> > 
> > <mok at mnet-online.de> wrote:
> > > Hello Neil,
> > > 
> > > On Sat, 03 Dec 2011, NeilBrown wrote:
> > > > hi all,
> > > > 
> > > >  I've updated my mainline gta04 kernel tree to 3.2-rc4.
> > > >  
> > > >     git://neil.brown.name/gta04 merge
> > > > 
> > > > The main new functionality is wireless.  The details for enabling
> > > > wireless are slightly different than with the hw-validation kernel.
> > > > 
> > > > 1/ the reset line is /sys/class/gpio/gta04:wlan:reset
> > > > 
> > > >     write 0 to reset, 1 to release the reset
> > > >    
> > > >    The "reset" line is active-low.
> > > > 
> > > > 2/ After power-on and reset you need to trigger a card-detect signal.
> > > > 
> > > >    This requires making gpio/gta:wlan/cd go high, then low. 
> > > >    Card-detect is active-low too.
> > > > 
> > > > so:
> > > > 
> > > > VDD=3150000
> > > > # VDD=2800000
> > > > echo 1 > /sys/class/gpio/gta04:wlan:cd/value
> > > > echo "0" >/sys/class/gpio/gta04:wlan:reset/value # activate reset
> > > > echo "$VDD" >/sys/devices/platform/reg-virt-consumer.4/max_microvolts
> > > > echo "$VDD" >/sys/devices/platform/reg-virt-consumer.4/min_microvolts
> > > > echo "normal" >/sys/devices/platform/reg-virt-consumer.4/mode
> > > > echo "1" >/sys/class/gpio/gta04:wlan:reset/value # release reset
> > > > echo 0 > /sys/class/gpio/gta04:wlan:cd/value  # edge triggers
> > > > interrupt.
> > > > 
> > > > Each gpio directory has an 'active_low' setting.  I should probably
> > > > find a way to enable that...  Unless I end up hiding all of this
> > > > inside an rfkill.
> > > > 
> > > > 
> > > > I added the code to enable power-off, but it doesn't work.
> > > > As soon as it tries to access the i2c device to send the power-down
> > > > command to the twl4030 it triggers an error.  It seems that
> > > > something earlier in the shutdown sequence disabled something that
> > > > is needed for writing to I2C, but I have no idea what.
> > > > I've sent an email to someone to ask for hints..
> > > > 
> > > > I discovered that USB_OTG is disabled in the default config, because
> > > > USB_SUSPEND is disabled.  If I enable this (because they sound like
> > > > good things) the charging doesn't work any more.
> > > > I think the usb port goes to sleep and so stops charging.  I really
> > > > need to find a way for the charger to keep the usb port awake.
> > > > 
> > > > Still to do:
> > > >  - power off
> > > >  - accelerometers
> > > >  - explore various bugs reported in dmesg:
> > > >  - Find out why 'suspend' doesn't suspend
> > > >  - Make sure suspend saves maximum power.
> > > >  
> > > >  - make sure can wake from suspend by:
> > > >     power button, rtc, accelerometer, GSM
> > > >  
> > > >  - tidy up LCD panel driver.
> > > >  - make charger keep usb awake, and enable USB_OTG
> > > >  - see if I can make an 'rfkill' device that will power-on wifi/BT
> > > >  for me. - Maybe an rfkill for 'gps' as well.
> > > >  - further explore the rtc alarm bug I found last week.
> > > >  - gyroscope, compass, barometer,  FM radio?
> > > >  - See if I can get it to charge from Openmoko charger.
> > > >  - get all the fixes upstream.
> > > > 
> > > > My goal is to be using this as my regular phone by LCA-2012 !!
> > > 
> > > great :-)
> > > 
> > > I have one problem with rc4. Touchsreen stopped working:
> > > 
> > > root at om-gta04:~# cat /dev/input/event0
> > > [  739.782196] omap_i2c omap_i2c.2: controller timed out
> > > [  739.813537] tsc2007 2-0048: i2c io error: -110
> > 
> /me already regrets to not have attended Christoph's talk about i2c in
> the kernel :/
> 

You might also regretting not attending his mail from just a few hours ago:

_ In case you use the debian stable rootfs from goldelico and want to
_ try the new 3.2 kernel, the touchscreen will stop working. To fix it
_ either install a newer tslib or (what I did) upgrade to debian testing
_ which includes a working version.
_ 
_ Best regards,
_   Christoph


Sorry for crossposting!

Boudewijn
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