Baytrail GPIO

Gonzo's instructions:
To enable it in kernel you need add following lines to the kernel config:
device gpio
device bytgpio
Most of the GPIO pins exposed on Minnowboard belong to /dev/gpioc2, for instance D2 LED is controlled by pin 22 on /dev/gpioc2, to blink it you can use this command:

gpioctl -f /dev/gpioc2 -t 22

GPIOs on the Turbot low-speed expansion headers are pins 0, 1, 2, 3 on /dev/gpioc2.
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