tree 7d2a7358510379edac03f23ff589a3450590d392
parent 6d2fbba0ed5436fc06112e6b9bc5386377cc82ff
author Michael Niewöhner <foss@mniewoehner.de> 1618332440 +0200
committer Michael Niewöhner <foss@mniewoehner.de> 1620754087 +0000

docs: add recommendation for gpios regarding soft straps

Soft straps, that can be configured by the vendor in the Intel Flash
Image Tool (FIT), can influence some pads' default state. It is possible
to select either a native function or GPIO mode for some pads on
non-server SoCs, while on server SoCs most pads can be controlled.

Thus, add a recommendation to always configure all pads for a board to
guarantee integrity between different board or vendor firmware revisions
where the soft straps might have been changed.

Change-Id: I33063a3f6a1c9cd5267d85f7da84deb554489a26
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52297
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>