[PATCH 1/2] imx: kontron-sl-mx8mm: Adjust offset for U-Boot proper in case of eMMC fastboot

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf at kontron.de>

The image offset on SD/MMC devices is 33 KiB, except for eMMC boot if
fastboot is enabled. In this case it is 1 KiB. In order to make the
the bootloader universal, check the fastboot OTP boot fuse and adjust
the offset.

Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
---
 board/kontron/sl-mx8mm/spl.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/board/kontron/sl-mx8mm/spl.c b/board/kontron/sl-mx8mm/spl.c
index e3b029752b8..50eb0eb13e1 100644
--- a/board/kontron/sl-mx8mm/spl.c
+++ b/board/kontron/sl-mx8mm/spl.c
@@ -186,6 +186,26 @@ static int power_init_board(void)
 	return 0;
 }
 
+unsigned long board_spl_mmc_get_uboot_raw_sector(struct mmc *mmc, unsigned long raw_sect)
+{
+	/*
+	 * The image offset on SD/MMC devices is 33 KiB, except for eMMC boot if
+	 * fastboot is enabled. In this case it is 1 KiB. In order to make the
+	 * bootloader universal, check the fastboot OTP boot fuse and adjust
+	 * the offset.
+	 */
+	if (!IS_SD(mmc) && (readl(OCOTP_BASE_ADDR + 0x470) & 0x80)) {
+		switch (EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)) {
+		case EMMC_BOOT_PART_BOOT1:
+		case EMMC_BOOT_PART_BOOT2:
+			raw_sect -= 32 * 2;
+			break;
+		}
+	}
+
+	return raw_sect;
+}
+
 void board_init_f(ulong dummy)
 {
 	int ret;
-- 
2.51.0