If I had to guess, I would say it's the PMIC interrupt from the RK808 that notifies the OS of a power management event:
15.2.5.4 INT_STS_MSK_REG2 : Interrupt Status Register #2
Bit 1 PLUG_OUT_INT_IM: Charger plug out event interrupt mask.
1: Mask the interrupt
0: Do not mask the interrupt
Bit 0 PLUG_IN_INT_IM: Charger plug in event interrupt mask
1: Mask the interrupt
0: Do not mask the interruptk
In normal operation you want to handle those to know that a charger is present, in suspend probably those and other PMIC IRQs should be masked.
The question is, where in the software stack is this handled exactly, ATF or Linux?
15.2.5.4 INT_STS_MSK_REG2 : Interrupt Status Register #2
Bit 1 PLUG_OUT_INT_IM: Charger plug out event interrupt mask.
1: Mask the interrupt
0: Do not mask the interrupt
Bit 0 PLUG_IN_INT_IM: Charger plug in event interrupt mask
1: Mask the interrupt
0: Do not mask the interruptk
In normal operation you want to handle those to know that a charger is present, in suspend probably those and other PMIC IRQs should be masked.
The question is, where in the software stack is this handled exactly, ATF or Linux?
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