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2017-11-17amd/stoneyridge: Add SPI controller driverMarshall Dawson
Add more definitions for the controller registers and fields. Add source that is adapted from hudson and updated for Stoney Ridge. This was tested with follow-on patches that write S3 data to flash. BUG=b:68992021 Change-Id: I61d64cfdb4fce11c068113680da7ba6a199d6893 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/22408 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>