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Diffstat (limited to 'Documentation/boards/stm32mp.rst')
| -rw-r--r-- | Documentation/boards/stm32mp.rst | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Documentation/boards/stm32mp.rst b/Documentation/boards/stm32mp.rst index 7c657eb990..b235c39927 100644 --- a/Documentation/boards/stm32mp.rst +++ b/Documentation/boards/stm32mp.rst @@ -64,7 +64,7 @@ An appropriate image for a SD-Card can be generated with following } For eMMC, the boot partitions are used as the FSBL partitions and so the user -partitions may look like this: +partitions may look like this:: image @STM32MP_BOARD@.img { partition ssbl { @@ -80,6 +80,17 @@ partitions may look like this: The fsbl1 and fsbl2 can be flashed by writing to barebox ``/dev/mmcX.boot0`` and ``/dev/mmcX.boot1`` respectively or from a booted operating system. +Additionally, the eMMC's ``ext_csd`` register must be modified to activate the +boot acknowledge signal (``BOOT_ACK``) and to select a boot partition. + +Assuming ``CONFIG_CMD_MMC_EXTCSD`` is enabled and the board shall boot from +``/dev/mmc1.boot1``:: + + mmc_extcsd /dev/mmc1 -i 179 -v 0x50 + +The STM32MP1 BootROM does *not* support booting from eMMC without fast boot +acknowledge. + Boot source selection --------------------- |