From: Fabio Estevam fabio.estevam@nxp.com

fastboot tool is a convenient way to flash the eMMC, so add support for it.

Examples of usages:

On the mx6sabresd:

=> fastboot 0

On the Linux PC connected via USB:

$ sudo fastboot getvar bootloader-version -i 0x0525 bootloader-version: U-Boot 2018.01-00550-g7517cfe finished. total time: 0.000s

Shawn Guo described the following method for flashing the eMMC via flashboot:

"I booted the board into Debian via NFS, and then use gpart to create GPT partitions on the eMMC. With CONFIG_EFI_PARTITION enabled in U-Boot, I can list the partitions on eMMC as below.

=> mmc dev 2 switch to partitions #0, OK mmc2(part 0) is current device => mmc part

Partition Map for MMC device 2 -- Partition Type: EFI

Part Start LBA End LBA Name Attributes Type GUID Partition GUID 1 0x00000800 0x000407ff "boot" attrs: 0x0000000000000000 type: 21686148-6449-6e6f-744e-656564454649 guid: 6137f187-600c-4dc4-8a74-ee8f0250d455 2 0x00040800 0x002987ff "system" attrs: 0x0000000000000000 type: 0fc63daf-8483-4772-8e79-3d69d8477de4 guid: af78282f-21b5-4324-bf7a-f460d1ae0015 3 0x00298800 0x003187ff "vendor" attrs: 0x0000000000000000 type: 0fc63daf-8483-4772-8e79-3d69d8477de4 guid: 15830513-0195-4e86-9b2c-cd3af5e14570 4 0x00318800 0x003587ff "cache" attrs: 0x0000000000000000 type: 0fc63daf-8483-4772-8e79-3d69d8477de4 guid: 6e909a60-606b-4c43-bbd4-f780afd97302 5 0x00358800 0x00ecbfde "data" attrs: 0x0000000000000000 type: 0fc63daf-8483-4772-8e79-3d69d8477de4 guid: 9e79dc0b-35d9-40f0-b638-3e718362cb26 => fastboot 0

At this point, I can do 'fastboot flash system system.img -i 0x0525' from host PC."

Signed-off-by: Fabio Estevam fabio.estevam@nxp.com --- Changes since v1: - Select CONFIG_EFI_PARTITION=y (Shawn) - Provide the eMMC flashing procedure (Michael)

configs/mx6sabresd_defconfig | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/configs/mx6sabresd_defconfig b/configs/mx6sabresd_defconfig index 3e4c13c..9a4184b 100644 --- a/configs/mx6sabresd_defconfig +++ b/configs/mx6sabresd_defconfig @@ -20,6 +20,12 @@ CONFIG_SPL_USB_HOST_SUPPORT=y CONFIG_SPL_USB_GADGET_SUPPORT=y CONFIG_SPL_USB_SDP_SUPPORT=y CONFIG_HUSH_PARSER=y +CONFIG_FASTBOOT=y +CONFIG_FASTBOOT_BUF_ADDR=0x12000000 +CONFIG_FASTBOOT_BUF_SIZE=0x10000000 +CONFIG_FASTBOOT_USB_DEV=0 +CONFIG_FASTBOOT_FLASH=y +CONFIG_FASTBOOT_FLASH_MMC_DEV=2 CONFIG_CMD_BOOTZ=y CONFIG_CMD_SPL=y CONFIG_CMD_SPL_WRITE_SIZE=0x20000 @@ -41,6 +47,7 @@ CONFIG_CMD_EXT4=y CONFIG_CMD_EXT4_WRITE=y CONFIG_CMD_FAT=y CONFIG_CMD_FS_GENERIC=y +CONFIG_EFI_PARTITION=y CONFIG_ENV_IS_IN_MMC=y CONFIG_SPI_FLASH=y CONFIG_SPI_FLASH_STMICRO=y