> >issue with i2c since other drivers have the same design. What I don't > >have is clear understanding of if/when/how i2c_transfer() can be called > >post kernel_power_off(). Not sure if it is exactly the same issue, but last year we concluded that we probably need an optional i2c_transfer_noirq callback in i2c_adapter to talk to PMICs very late or very early. No work has been done so far, though. I hope I will find time for it this year.
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