* Pavel Machek [off-list ref] [160323 05:38]:

Ok, another attempt at shutting USB down:

00001fff 48005020 (fa005020) cm_idlest_per blocking bits: 0007e000
f7dffe9d 48004a20 (fa004a20) cm_idlest1_core blocking bits: 00200062
0000000d 48004a28 (fa004a28) cm_idlest3_core

Tried again today:

00001fff 48005020 (fa005020) cm_idlest_per blocking bits: 0007e000
f7dffe9d 48004a20 (fa004a20) cm_idlest1_core blocking bits: 00200062
0000000d 48004a28 (fa004a28) cm_idlest3_core
pavel at n900:/my/tui/ofone$ sleep test

00001fff 48005020 (fa005020) cm_idlest_per blocking bits: 0007e000
ffde7e9d 48004a20 (fa004a20) cm_idlest1_core blocking bits: 00218062
0000000d 48004a28 (fa004a28) cm_idlest3_core

00001fff 48005020 (fa005020) cm_idlest_per blocking bits: 0007e000
fedffe9d 48004a20 (fa004a20) cm_idlest1_core blocking bits: 01200062
0000000d 48004a28 (fa004a28) cm_idlest3_core

00001fff 48005020 (fa005020) cm_idlest_per blocking bits: 0007e000
ffde7e9d 48004a20 (fa004a20) cm_idlest1_core blocking bits: 00218062
0000000d 48004a28 (fa004a28) cm_idlest3_core

Is there documentation for the cm_idlest1_ bits?

Yes, see the TRM.

How idle system do I need to have? Screen is blanked and machine
should be mostly idle, but there's X running on another vt with Mate
desktop, and some python scripts... GSM modem should be online.

Well I think it's the USB only you have blocking deeper idle states.

Are you sure you rmmod:ed all the USB related modules like in my
test script?

MUSB currently has an unresolved issue where it blocks idle states
if loaded.

Are you booting over USB from NOLO?

I'm booting over smc91x using u-boot.

Regards,

Tony