
The BMC uses the following devices in the kernel:

Serial ports:
 1: /dev/ttyAS0
 2: /dev/ttyAS1
 3: /dev/ttyAS2
 4: /dev/ttyAS3
 5: /dev/ttyAS4
 6: /dev/ttyS1


Fan fail LEDs:
    /sys/class/astgpio/GPIOP0
    /sys/class/astgpio/GPIOP1
    /sys/class/astgpio/GPIOP2
    /sys/class/astgpio/GPIOP3

Power supply status:
    /sys/class/wixpmbus/STATUS_1
    /sys/class/wixpmbus/STATUS_2

Board reset:
    /sys/class/astgpio/GPIOH[0-5]

Board power:
    /sys/class/astgpio/GPIOD[6-7]
    /sys/class/astgpio/GPIOB[0-3]

Board present:
    /sys/class/astgpio/GPIOC[0-5]

Power off request:
    /sys/class/astgpio/GPIOA[6-7]
    /sys/class/astgpio/GPIOI[4-7]

Power off ready:
    /sys/class/astgpio/GPIOA[0-3]
    /sys/class/astgpio/GPIOG[4-5]

System FRU data:
    /sys/class/i2c-adapter/i2c-0/0-0051/at24c128

Switch sensors:
 switch temp:
    /sys/class/i2c-adapter/i2c-0/0-0058/temp2_input
 switch cpu temp:
    /sys/class/i2c-adapter/i2c-0/0-0058/temp3_input
 12V
    /sys/class/i2c-adapter/i2c-0/0-0058/in11_input
 3.3V
    /sys/class/i2c-adapter/i2c-0/0-0058/in10_input
 1.8V
    /sys/class/i2c-adapter/i2c-0/0-0058/in2_input
 Fan 1-8
    /sys/class/astfan/fan[1-8]_input

Power supply
 Voltage:
    /sys/class/wixpmbus/VOUT_[1-2]
 Current:
    /sys/class/wixpmbus/IOUT_[1-2]
  Power
    /sys/class/wixpmbus/POUT_[1-2]


For the rest of these "n" is the board number.

 Board FRU data
    /sys/class/i2c-adapter/i2c-n/n-0050/at24c64
 Board CPU temp
    /sys/class/i2c-adapter/i2c-n/n-0064/temp1_input
 Board DIMM temp
    /sys/class/i2c-adapter/i2c-n/n-001e/temp1_input
 Board motherboard temp
    /sys/class/i2c-adapter/i2c-n/n-004a/temp1_input
 Board front temp
    /sys/class/i2c-adapter/i2c-n/n-004c/temp1_input
 1V
    /sys/class/i2c-adapter/i2c-n/n-0048/in3_input
 1.8V
    /sys/class/i2c-adapter/i2c-n/n-0048/in2_input
 2.5V
    /sys/class/i2c-adapter/i2c-n/n-0048/in1_input
 3.3V
    /sys/class/i2c-adapter/i2c-n/n-0048/in0_input
 1.05V
    /sys/class/i2c-adapter/i2c-n/n-0049/in2_input
 DIMM V
    /sys/class/i2c-adapter/i2c-n/n-0049/in1_input
 .9V
    /sys/class/i2c-adapter/i2c-n/n-0049/in0_input


