Re: [RFC/PATCH 1/5] usb: otg: add notifier support

[Felipe Balbi]

Hi,

On Tue, Jan 26, 2010 at 08:09:34PM +0100, Balbi Felipe (Nokia-D/Helsinki) wrote:
> well, if you have access to twl5031 docs you'd understand what I'm
> talking about, the charger detection involves at least 3 blocks on
> twl5031 plus musb to enable/disable pullups. The sequence is pretty much
> as below:

there's more which I forgot:

> 1. vbus irq
> 2. usb_gadget_disconnect()
> 3. disable usb ldos

3.1 put transceiver in non-drivig mode

> 4. switch usb3v1 supply from vbat to vbus (to let charger detection work
> on low bat)
> 5. enable usb3v1 *only*
> 6. call the notifier chain
> 7. BCC module kicks charger detection
> 8. disable usb3v1
> 9. switch usb3v1 supply back to vbat

9.1 put transceiver back to normal mode

> 10. enable usb ldos
> 11. usb_gadget_connect() (necessary since we might be connected to
> charging port)

now it should be all fine.

--
balbi
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