in arch/mips/pci/pci-mt7621.c
we have #define GPIO_PERST that is always set.
This has the side effect of setting gpio pin 7,8 and 19 to gpio and set
the output value to 0.
I could understand gpio19(perst) if there was some hardware errata that
made the perst function not working and this code do the same thing but
using gpio,
but why 7(UART_TXD3) and 8(UART_RXD3) ?? it makes no sense. at least not
on my board and the refboard.
Should not GPIO_PREST be unset ?
also the driver do not use the pinmux or gpio driver but goes directly
to the register making it "very interesting" finding out why the pins
has the wrong values.
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