Messages in this thread | | | Subject | Re: Nokia N900 - audio TPA6130A2 problems | From | Ivaylo Dimitrov <> | Date | Sat, 19 Mar 2016 10:49:57 +0200 |
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Hi,
On 18.03.2016 17:04, Sebastian Reichel wrote: > Hi, > > On Fri, Mar 18, 2016 at 03:45:26PM +0200, Ivaylo Dimitrov wrote: >> On 18.03.2016 15:36, Sebastian Reichel wrote: >> >> >> Regulator is V28_A, which is always-on, so it is enabled no matter what >> probe does. Anyway, I added a various delays after regulator_enable(), to no >> success. >
I guess we're getting closer - I put some printks in various functions in the twl-regulator.c, here is the result:
on power-up:
[ 2.378601] twl4030ldo_get_voltage_sel VMMC2 vsel 0x00000008 [ 2.384948] twl4030reg_enable VMMC2 grp 0x00000020 [ 2.408416] twl4030ldo_get_voltage_sel VMMC2 vsel 0x00000008 [ 7.196685] twl4030reg_is_enabled VMMC2 state 0x0000002e [ 7.202819] twl4030reg_is_enabled VMMC2 state 0x0000002e [ 7.209777] twl4030reg_is_enabled VMMC2 state 0x0000002e [ 7.215728] twl4030reg_is_enabled VMMC2 state 0x0000002e [ 7.223205] twl4030reg_is_enabled VMMC2 state 0x0000002e
after restart from stock kernel:
[ 2.388610] twl4030ldo_get_voltage_sel VMMC2 vsel 0x0000000a [ 2.394958] twl4030reg_enable VMMC2 grp 0x00000028 [ 2.418426] twl4030ldo_get_voltage_sel VMMC2 vsel 0x0000000a [ 7.186645] twl4030reg_is_enabled VMMC2 state 0x00000020 [ 7.192718] twl4030reg_is_enabled VMMC2 state 0x00000020 [ 7.199615] twl4030reg_is_enabled VMMC2 state 0x00000020 [ 7.205535] twl4030reg_is_enabled VMMC2 state 0x00000020 [ 7.212951] twl4030reg_is_enabled VMMC2 state 0x00000020
I don't see twl4030ldo_set_voltage_sel() for VMMC2(V28_A) regulator, though there are calls for VMMC1 and VAUX3.
So, it seems to me that V28_A is not enabled or correctly set-up and all devices connected to it does not function. And it looks like even after power-on VMMC2 is not correctly set-up - it is supposed to have voltage of 2.85V (10) but kernel leaves it to 2.60V (8). However my twl-fu ends here so any help is appreciated.
Ivo
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