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Doc/mb/lenovo/Sandy_Bridge_series.md: Clarify installation 

Unlike Ivy Bridge series, there isn't a method to flash coreboot
internally when running vendor firmware (yet). Until someone finds a way
to bypass flash protections, the first flash has to be done externally.

Change-Id: Idaff264f2b7277516d69d1323f1a0c885b28c3db
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49848
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Angel Pons 2021-01-22 19:14:07 +01:00
parent 76943a3443
commit 0ec903a73b
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Documentation/mainboard/lenovo/Sandy_Bridge_series.md
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@ -22,6 +22,10 @@
```
## Installation instructions
Flashing coreboot for the first time needs to be done using an external
programmer, because vendor firmware prevents rewriting the BIOS region.
* Update the EC firmware, as there's no support for EC updates in coreboot.
* Do **NOT** accidentally swap pins or power on the board while a SPI flasher
is connected. It will destroy your device.