Currently the driver defines 3 gpiochips, one for each bank.
/sys/class/gpio/gpiochip416/label:1e000600.gpio
/sys/class/gpio/gpiochip448/label:1e000600.gpio
/sys/class/gpio/gpiochip480/label:1e000600.gpio
Unfortunately they all have the same label
Interrupts from /proc/interrupt show the same name which is
confusing:
/proc/interrupts:
17: 0 0 0 0 MIPS GIC 19 mt7621, mt7621, mt7621
which is the interrupt from the GPIO controller.
It is a little weird that all three banks are named "mt7621"
here. We also have:
26: 0 0 0 0 GPIO 18 reset
which is the interrupt from GPIO which provides the "reset"
button. I suspect that if I had interrupts form two different
banks they would both be called "GPIO" which would be a little
confusing.
In order to unify all of this set different names for each chip
Use a 'bank-based' name instead the same for all: 'mt7621-bank[0-2]'.
Create a new 'mediatek_gpio_bank_name' function which return the
name depending on the bank number. This function is allways called
with a valid index 0, 1 or 2.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
c4604a0e5c