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Bettong uses 3 GPIO(5-7) pins to identify board.
The GPIO ports are mapped to MMIO space.
The GPIO value and board version are mapped as follow:
GPIO5 GPIO6 GPIO7 Version
0 0 0 A
0 0 1 B
......
1 1 1 H
Change-Id: I72df28043057d8c4ccc4a2e645011ca5379e9928
Signed-off-by: WANG Siyuan <wangsiyuanbuaa@gmail.com>
Signed-off-by: WANG Siyuan <SiYuan.Wang@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/11732
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
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