df5490: added pcf child pcf0, probing+attaching
pcf0: <PCF8584 I2C bus controller> at port 0x320-0x321 irq 5 on isa1
interrupt uses mplock: pcf0
iicbus0: <Philips I2C bus> on pcf0 addr 0xaa
df5490: device_probe_and_attach -> 0
df5490: pcf0=pcf0 state=3 children=1
df5490: child[0]=iicbus0 state=3 softc=0xfffff8004f0e7478 devclass=iicbus
df5490: calling iicbus_intr(child0, INTR_RECEIVE, &c) == pcfintr pcf.c:475
df5490: iicbus_intr RETURNED (no fault)