Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

#!/bin/sh

# Read a char from the factory config

# $1 - /dev/i2c-$1

# $2 - byte offset, 28 to 42 is full model number

FactoryConfigReadChar()

{

    hex=$(i2cget -y $1 0x55 $2 2>/dev/null) || return 1

    echo $hex | awk '{printf "%c", $1}'

}

# Check /dev/i2c-1 through 3 for cpu speed char

# Print i2c device number

ProbeFactoryConfig()

{

    i2cDevice=$( 

	(FactoryConfigReadChar 1 28 >/dev/null && echo 1) || 

	(FactoryConfigReadChar 2 28 >/dev/null && echo 2) || 

	(FactoryConfigReadChar 3 28 >/dev/null && echo 3)

    ) || return 1

    echo $i2cDevice

}

# Read factory config for cpu type

# Prints 3352, 3354, or 3359

i2cDevice=$(ProbeFactoryConfig) || exit $?

for i in $(seq 28 31)

do

    code="$code$(FactoryConfigReadChar $i2cDevice $i)"

done

echo $code