u-boot/board/mediatek/mt7623/mt7623_rfb.c
Frank Wunderlich f3af98eca5 adding saveenv-command for bananapi r2
bananapi r2 can be booted from sd-card and emmc
saving the environment have to choose the storage
from which the device has booted

also the offset is set to 1MB to make sure env is written
to block "user data area" between uboot and first partition

https://www.fw-web.de/dokuwiki/lib/exe/fetch.php?cache=&media=bpi-r2:boot-structure.png

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
2019-01-18 09:26:04 -05:00

35 lines
613 B
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 MediaTek Inc.
*/
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
int board_init(void)
{
/* address of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
return 0;
}
int mmc_get_boot_dev(void)
{
int g_mmc_devid = -1;
char *uflag = (char *)0x81DFFFF0;
if (strncmp(uflag,"eMMC",4)==0) {
g_mmc_devid = 0;
printf("Boot From Emmc(id:%d)\n\n", g_mmc_devid);
} else {
g_mmc_devid = 1;
printf("Boot From SD(id:%d)\n\n", g_mmc_devid);
}
return g_mmc_devid;
}
int mmc_get_env_dev(void)
{
return mmc_get_boot_dev();
}