I need to bit twiddle saa7134 gpio pins from userspace.
To use gpio-sysfs, I need a "GPIO number" to export each pin, but I
do not know how to find such a number.
Card is RTD Embedded Technologies VFG7350 [card=72,autodetected].
GPIO uses pcf8574 chip.
Kernel is 2.6.30.
gpio-sysfs creates
/sys/class/gpio/export
/sys/class/gpio/import
but no gpio<n> entries so far.
>From dmesg ("gpiotracking=1")
saa7133[0]: board init: gpio is 10000
saa7133[0]: gpio: mode=0x0000000 in=0x4011000 out=0x0000000 [pre-init]
saa7133[1]: board init: gpio is 10000
saa7133[1]: gpio: mode=0x0000000 in=0x4010f00 out=0x0000000 [pre-init]
How may I find each "GPIO number" for this board?
Thanks in advance for any help.
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