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board: mediatek: fix mmc_get_boot_dev() for platforms without external SD

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On the UniElec U7623 board there is no external SD slot and the preloader
doesn't fill in the magic field at 0x81dffff0 to indicate that it was
booted from eMMC.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse 2020-07-12 23:33:01 +01:00 committed by Tom Rini
parent b39cacc268
commit e3cc511eef
1 changed files with 7 additions and 0 deletions
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7
board/mediatek/mt7623/mt7623_rfb.c
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@ -4,6 +4,7 @@
*/
#include <common.h>
#include <mmc.h>
DECLARE_GLOBAL_DATA_PTR;
@ -15,10 +16,15 @@ int board_init(void)
return 0;
}
#ifdef CONFIG_MMC
int mmc_get_boot_dev(void)
{
int g_mmc_devid = -1;
char *uflag = (char *)0x81DFFFF0;
if (!find_mmc_device(1))
return 0;
if (strncmp(uflag,"eMMC",4)==0) {
g_mmc_devid = 0;
printf("Boot From Emmc(id:%d)\n\n", g_mmc_devid);
@ -33,3 +39,4 @@ int mmc_get_env_dev(void)
{
return mmc_get_boot_dev();
}
#endif