[Letux-kernel] Charging on GTA04
H. Nikolaus Schaller
hns at goldelico.com
Mon Jun 27 20:15:54 CEST 2016
> Am 27.06.2016 um 20:06 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>
> Hi all,
> I have not found the issue, but a "good" kernel where works:
>
> a) hdq / bq27000
> b) ip over usb
> c) charging
>
> What is also not working is USB plug-in detection with the long cable...
>
> Anyways, we have a "good" and a "bad" kernel. Let's start to diff
some first observations:
- bq27xxx driver has been completely rewritten. There were bugs for other
fuel gauge chips and there might still be one for bq27000.
- twl4030_charger.c has been converted to use iio madc for VAC and
replaced non-standard sysfs nodes by standard ones
> and
> find out what is going wrong :)
>
> good: http://download.goldelico.com/letux-kernel/4.3/
> bad: http://download.goldelico.com/letux-kernel/letux-4.7-rc5/
>
> What I suspect from this is that some editing of a feature branch (especially
> the charger code) did go wrong.
One thing is still different: the sequence of initializing interrupts and registering
the charger. I remember that these patches got garbled a little by rebasing
so I had to reconstruct them. Maybe that is the issue.
But it can still be completely somewhere else!
BR,
Nikolaus
>
> BR,
> Nikolaus
>
>
>
>> Am 26.06.2016 um 22:14 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>
>>
>>> Am 26.06.2016 um 19:36 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>
>>>
>>>> Am 26.06.2016 um 18:43 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>
>>>>
>>>>> Am 26.06.2016 um 18:07 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>
>>>>>
>>>>>> Am 26.06.2016 um 17:12 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>
>>>>>>
>>>>>>> Am 26.06.2016 um 15:01 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>
>>>>>>>
>>>>>>>> Am 24.06.2016 um 10:03 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
>>>>>>>>
>>>>>>>> Hi,
>>>>>>>> it appears as if USB detection is now completely broken on -rc4...
>>>>>>>>
>>>>>>>> I have two boards where I neither get some "USB plugged in" nor
>>>>>>>> does /sys/class/power/usb start charging.
>>>>>>>>
>>>>>>>> Something has gone wild.
>>>>>>>>
>>>>>>>> Does it work for anyone of you?
>>>>>>>
>>>>>>> Here some observations to this problem (using letux-4.7-rc4):
>>>>>>>
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>> POWER_SUPPLY_STATUS=Not charging
>>>>>>> POWER_SUPPLY_ONLINE=0
>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# echo continuous >mode
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat mode
>>>>>>> off auto [continuous]
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>> POWER_SUPPLY_STATUS=Charging
>>>>>>> POWER_SUPPLY_ONLINE=1
>>>>>>> POWER_SUPPLY_VOLTAGE_NOW=0
>>>>>>> POWER_SUPPLY_CURRENT_NOW=12474
>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# echo auto >mode
>>>>>>> [ 189.735412] twl4030_bci 48070000.i2c:twl at 48:bci: battery temperature out of range
>>>>>>> [ 189.766967] twl4030_bci 48070000.i2c:twl at 48:bci: battery temperature out of range
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb# cat uevent
>>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>>> POWER_SUPPLY_STATUS=Not charging
>>>>>>> POWER_SUPPLY_ONLINE=0
>>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=841
>>>>>>> root at letux:/sys/class/power_supply/twl4030_usb#
>>>>>>>
>>>>>>> This means:
>>>>>>> 1. "auto" mode is broken
>>>>>>> 2. continuous mode seems to charge
>>>>>>> 3. switching back to auto mode gives strange "battery temperature out of range" warning
>>>>>>>
>>>>>>> And I have no ethernet-gadget.
>>>>>>>
>>>>>>> I think I should compare with letux-4.6.0 or other -rc. And I should enable debugging
>>>>>>> of the driver.
>>>>>>
>>>>>> Well, 4.6.0 isn't charging as well (and no ethernet gadget). And older versions are not properly booting.
>>>>>>
>>>>>> One strange observation:
>>>>>>
>>>>>> root at letux:~# cat /sys/class/power_supply/twl4030_usb/voltage_now
>>>>>> 0
>>>>>> root at letux:~# cat /sys/class/power_supply/twl4030_usb/uevent
>>>>>> POWER_SUPPLY_NAME=twl4030_usb
>>>>>> POWER_SUPPLY_STATUS=Charging
>>>>>> POWER_SUPPLY_ONLINE=1
>>>>>> POWER_SUPPLY_VOLTAGE_NOW=0
>>>>>> POWER_SUPPLY_CURRENT_NOW=808476
>>>>>> POWER_SUPPLY_INPUT_CURRENT_LIMIT=798505
>>>>>> root at letux:~#
>>>>>>
>>>>>> This means that voltage_now and POWER_SUPPLY_VOLTAGE_NOW is 0 although charging!
>>>>>>
>>>>>> This is definitively different to 4.6.0 where USB voltage is displayed.
>>>>>>
>>>>>> Is perhaps the madc broken?
>>>>>
>>>>> Yes and no...
>>>>>
>>>>> This is what I get with #define DEBUG
>>>>>
>>>>> root at letux:~# dmesg|fgrep bci
>>>>> [ 8.864227] driver_register 'twl4030_bci'
>>>>> [ 8.864868] twl4030_bci_probe
>>>>> [ 8.864959] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 8.865020] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>> [ 8.865051] bci->transceiver = fffffdfb
>>>>> [ 8.943939] twl4030_bci_probe
>>>>> [ 8.944000] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 8.944061] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>> [ 8.944091] bci->transceiver = fffffdfb
>>>>> [ 8.953796] twl4030_bci_probe
>>>>> [ 8.953857] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 8.953918] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad220)
>>>>> [ 8.953948] bci->transceiver = fffffdfb
>>>>> [ 8.973114] twl4030_bci_probe
>>>>> [ 8.973175] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 8.973236] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad220)
>>>>> [ 8.973266] bci->transceiver = fffffdfb
>>>>> [ 8.988189] twl4030_bci_probe
>>>>> [ 8.988250] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 8.988311] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddd99320)
>>>>> [ 8.988342] bci->transceiver = fffffdfb
>>>>> [ 9.232696] twl4030_bci_probe
>>>>> [ 9.232788] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.232849] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddd99320)
>>>>> [ 9.232849] bci->transceiver = fffffdfb
>>>>> [ 9.238159] twl4030_bci_probe
>>>>> [ 9.238250] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.238281] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>> [ 9.238311] bci->transceiver = fffffdfb
>>>>> [ 9.396270] twl4030_bci_probe
>>>>> [ 9.396362] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.396392] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, dcac2f20)
>>>>> [ 9.396423] bci->transceiver = fffffdfb
>>>>> [ 9.424865] twl4030_bci_probe
>>>>> [ 9.424957] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.424987] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad020)
>>>>> [ 9.425018] bci->transceiver = fffffdfb
>>>>> [ 9.477874] twl4030_bci_probe
>>>>> [ 9.477966] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.477996] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad120)
>>>>> [ 9.478027] bci->transceiver = fffffdfb
>>>>> [ 9.530670] twl4030_bci_probe
>>>>> [ 9.530761] twl4030_bci_probe: of_find_compatible_node
>>>>> [ 9.530822] devm_usb_get_phy_by_node(ddcd2410 48070000.i2c:twl at 48:bci, df9b1af4 twl4030-usb, ddfad720)
>>>>> [ 9.530853] bci->transceiver = dca39410
>>>>> [ 9.530883] twl4030_bci 48070000.i2c:twl at 48:bci: could not request vac iio channel -19
>>>>> [ 9.546997] twl4030_bci 48070000.i2c:twl at 48:bci: transceiver = dca39410
>>>>> [ 9.546997] twl4030_bci 48070000.i2c:twl at 48:bci: OTG notify 0
>>>>> [ 9.548370] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.549224] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.549804] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.550292] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.550781] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.551300] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.552612] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.553131] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.553558] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.554046] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.554534] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.554992] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 9.626617] twl4030_bci 48070000.i2c:twl at 48:bci: v=0 cur=-850000 limit=0 target=500000
>>>>> [ 10.615722] twl4030_bci 48070000.i2c:twl at 48:bci: OTG notify 2
>>>>> [ 12.135711] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.136260] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.136840] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.137390] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.137817] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.139190] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.139678] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.140136] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.140563] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.141021] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.143005] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.143524] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.143951] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.144409] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.144866] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.146545] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.146972] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.147460] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.147918] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.165832] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.168548] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.169006] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.169433] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.169860] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.170288] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.198486] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.201812] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.202239] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.202697] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.203155] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.211883] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.212341] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.212799] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.213226] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.213684] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.216888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.217437] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.217895] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.219116] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.219635] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.419799] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.423065] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.423522] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.423980] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.424438] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.426727] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.427215] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.427642] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.428100] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.428558] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.430541] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.431182] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.431610] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.432067] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.432525] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.447662] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.448211] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.448669] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.449127] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 12.449554] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> root at letux:~#
>>>>>
>>>>> root at letux:~# echo auto >/sys/class/power_supply/twl4030_usb/mode
>>>>> [ 280.254119] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 08
>>>>> [ 280.266662] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 08
>>>>> [ 280.279632] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> root at letux:~# [ 280.288757] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.294769] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.303192] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.311340] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.319427] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.327392] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.334716] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.342620] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.356506] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.370605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.387207] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.393249] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.403289] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.409912] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.418304] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.427124] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.439941] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.447601] twl4030_bci 48070000.i2c:twl at 48:bci: v=0 cur=9150 limit=0 target=500000
>>>>> [ 280.452423] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.461273] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.465728] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.466339] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.466888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.467437] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.467926] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.476196] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.488464] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.490081] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.502502] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.514495] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.557800] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.576171] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.586883] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.607116] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.622772] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.629150] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.638549] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.646270] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.652954] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.659973] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.667388] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.674468] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.681243] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.689605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.700714] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.708557] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.716094] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.722961] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.731384] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.739349] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.747070] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.754119] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 280.761901] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>
>>>>> root at letux:~# echo continuous >/sys/class/power_supply/twl4030_usb/mode
>>>>> root at letux:~# [ 324.358245] twl4030_bci 48070000.i2c:twl at 48:bci: BCI irq 00 10
>>>>> [ 324.371276] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.378295] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.385040] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.394165] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.401306] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.402191] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.414855] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.426727] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.441223] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.447875] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.455444] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.463897] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.471313] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.479522] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.488952] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.497528] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.511199] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.522888] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.534454] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.544067] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.551605] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.558898] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.566894] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.573669] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.581848] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.589080] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.597717] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.652496] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.659973] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.667877] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.677307] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>> [ 324.686981] twl4030_bci 48070000.i2c:twl at 48:bci: state: 00
>>>>>
>>>>> Really interesting is
>>>>>
>>>>> [ 9.530883] twl4030_bci 48070000.i2c:twl at 48:bci: could not request vac iio channel -19
>>>>>
>>>>> Which means there is some error in the madc iio subsystem at that stage.
>>>>
>>>> Well, the bug is in one of our DT patches:
>>>>
>>>> <http://git.goldelico.com/?p=gta04-kernel.git;a=blob;f=arch/arm/boot/dts/twl4030.dtsi;h=0c862d2d7b5aa7e8460b91d143d6245a5c5a8da8;hb=f704c620abd294972e754c8b59a085191e411da8#l27>
>>>>
>>>> this line should read
>>>>
>>>> io-channel-names = "vac";
>>>>
>>>>>
>>>>> The second observation is that there is nothing happening on USB plug/unplug.
>>>>>
>>>>> IMHO USB-Plug detection is also broken (don't know if hw or software).
>>>>
>>>> Interestingly, I see different OTG notify values depending on whether
>>>> the cable is plugged in during boot or not. But no new notifications if I
>>>> unplug the cable.
>>>>
>>>> Well, that is only part of the truth:
>>>>
>>>> * if I take a short USB cable I can see notify 0 and notify 2 (but still no charging nor ethernet gadget)
>>>> * if I take a long cable and plug/unplug at the hub end, I don't see notifications
>>>> * if I take a long cable and plug/unplug at the gta04 end, I see notifications
>>>>
>>>> * MADC reports some mV only for VBUS
>>>>
>>>> That is really weird.
>>>>
>>>> What could this be (if not a hardware problem)?
>>>
>>> unlikely. I have swapped the SD card to a different GTA04 and it shows the same effects
>>> (long vs. short cable, no charging).
>>
>> HW problem can be definitively ruled out.
>>
>> I have flashed a fresh SD card through
>>
>> wget -O - http://download.goldelico.com/gta04/production/20150318-gta04.dd.bz2 | bzcat >/dev/sdc
>>
>> and that works perfectly (WARNING: it flashes an older U.Boot!).
>>
>> After reflashing the previous U-Boot and booting 4.6.0 it appears that charging works a little better.
>> And I got sometimes Ethernet over USB capability.
>>
>> But I also got strange problems when unplugging the USB cable:
>>
>> root at letux:~# [ 127.712615] musb-hdrc musb-hdrc.0.auto: VBUS_ERROR in b_idle (90, <VBusValid), retry #0, port1 00000100
>>
>> Quite strange...
>>
>> Will try 4.7-rc4 again tomorrow.
>>
>>>
>>> So please help to fix this!
>>>
>>>>
>>>> * USB/OTG detection is broken (some race between VBUS and D+/D- level detection on cable plug)
>>>> * charger is fully enabled (too high inrush-current) preventing VBUS to rising above the VBUS detection level
>>>> with short cable I have 4.54V
>>>> with long cable I have just 4.39V
>>>> * a bug in MADC so that VBUS is not reported properly
>>>> * is the OTG charge pump not being turned on/off?
>>>>
>>>> More ideas?
>>>>
>>>> BR,
>>>> Nikolaus
>>>>
>>>> _______________________________________________
>>>> http://projects.goldelico.com/p/gta04-kernel/
>>>> Letux-kernel mailing list
>>>> Letux-kernel at openphoenux.org
>>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>>>
>>> _______________________________________________
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>>> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel
>>
>> _______________________________________________
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>
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