Some methods for module configuration

Pure SW

1. Create a ROMHOLD/Binary image for configuration. The image can embed in BIOS.Need build a toolkit to setting the binary file for PE engineer.

2. Embed the configuration image to EC pace, BIOS can to use specfical OEM command to get the information.

SW/HW

1. Module provide a identification pin, such as a pull high pin, BIOS/EC can to read pin state. a module need allocate a GPIO to read.

2. Use EC/ADC channel to read a identification channel, all module just need a wire-OR identification channel.

    Reduce power leakage, use a gpio to control a N-MOSFET for the idenfication channel power.

When BIOS built ACPI table to fill the configuration information in ACPI table.

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