tree aeb74aea6e7d44a7fbe7e83b250f6bc657763ab0
parent ee849ba62574ac52e04d80f774a374d9b7558f67
author Matt DeVillier <matt.devillier@gmail.com> 1648524942 -0500
committer Paul Fagerburg <pfagerburg@chromium.org> 1654004642 +0000

drivers/i2c/generic: Add support for i2c device detection

Add 'detect' flag which can be attached to devices which may or may not
be present at runtime, and for which coreboot should probe the i2c bus
to confirm device presence prior to adding an entry for it in the SSDT.

This is useful for boards which may utilize touchpads/touchscreens from
multiple vendors, so that only the device(s) present are added to the
SSDT. This relieves the burden from the OS to detect/probe if a device
is actually present and allows the OS to trust the ACPI _STA value.

Change-Id: I1a4169ed6416d544773a37d29cdcc154d3c28519
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63211
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@tutanota.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>