falco: Add ACPI code to describe the I2C touchpad device

Hardware / Coreboot - Duncan Laurie [chromium.org] - 12 February 2014 16:31 UTC

If the SerialIO devices are put into ACPI mode then it is possible to use ACPI to instantiate the touchpad in the kernel without needing to have a platform level driver to do the binding.

This is the "new way" of describing on-board I2C devices and the upstream kernel is starting to add ACPI IDs to drivers so they can be used in this fashion. For the Cypress touchpad use a generic ACPI ID of "CYPA0000" to describe it.

In order to support the proper scoping of the touchpad device under the appropriate I2C controller device the mainboard.asl file needs to be included after pch.asl so the I2C device exists.

Change-Id: I81e053d27be478f3a19b6f9b13cd2b4fabcb88c0

b3b008a falco: Add ACPI code to describe the I2C touchpad device
src/mainboard/google/falco/acpi/mainboard.asl | 34 +++++++++++++++++++++++++
src/mainboard/google/falco/dsdt.asl | 4 ++-
2 files changed, 37 insertions(+), 1 deletion(-)

Upstream: review.coreboot.org

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