[PATCH v2] Documentation: boards: stm32mp: document eMMC partition layout
From: Ahmad Fatoum <a.fatoum@pengutronix.de>
Date: 2020-02-27 13:29:29
Subsystem:
documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
For eMMC, the boot partitions are used for FSBL instead of having these two partitions in the user area, like with SD-Cards. Document this. Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> --- v1 -> v2: - Fixed missing word in commit message - Reworded last paragraph a little --- Documentation/boards/stm32mp.rst | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/Documentation/boards/stm32mp.rst b/Documentation/boards/stm32mp.rst
index 6d97b0d6d4a2..de793ab3c96e 100644
--- a/Documentation/boards/stm32mp.rst
+++ b/Documentation/boards/stm32mp.rst@@ -35,7 +35,7 @@ The resulting images will be placed under ``images/``: Flashing barebox ---------------- -An appropriate image for the boot media can be generated with following +An appropriate image for a SD-Card can be generated with following ``genimage(1)`` config:: image @STM32MP_BOARD@.img {
@@ -61,7 +61,22 @@ An appropriate image for the boot media can be generated with following } } -Image can then be flashed on e.g. a SD-Card. +For eMMC, the boot partitions are used as the FSBL partitions and so the user +partitions may look like this: + + image @STM32MP_BOARD@.img { + partition ssbl { + image = "barebox-@STM32MP_BOARD@.img" + size = 1M + } + partition barebox-environment { + image = "/dev/null" + size = 1M + } + } + +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. Boot source selection ---------------------
--
2.25.0
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