coreboot
coreboot is an Open Source project aimed at replacing the proprietary BIOS found in most computers.
onboard.h
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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #ifndef BASKINGRIDGE_ONBOARD_H
4 #define BASKINGRIDGE_ONBOARD_H
5 
6 /* Recovery: GPIO69, active high - SV_DETECT - J8E3 (silkscreen: J8E2) */
7 #define GPIO_REC_MODE 69
8 
9 /* Write protect is active low */
10 #define GPIO_SPI_WP 22
11 
12 #endif