On Wed, 2013-07-31 at 19:57 +0800, Nishanth Menon wrote:

If you notice the reference code I send, atleast on TWL6035/37 variants 
of Palmas, USB IRQ unmask is mandatory for power on with USB cable - 
example usage scenario: extremely low battery, device powered off, plug 
in usb cable to restart charging - you'd like to initiate charging logic 
in bootloader, but that wont work if the device does not do OFF-ON 
transition with usb cable plugged in for vbus.

Why do we need to add Palmas USB_IRQ unmask logic in shutdown? Does that
mean for all platform using Palmas has to unmask USB IRQ (including
those do not power vbus through Palmas)? Can't we just have a simple
shutdown function but have the VBus programming been done in USB driver
or maybe platform driver since it is platform specific control?