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Boards which use an I2C TPM and do not use vboot will not have the I2C bus initialized/ready at the start of the device init phase. If TPM init is called before the bus, init will fail with I2C transfer timeouts and a significantly lengthened boot time. Resolves: https://ticket.coreboot.org/issues/429 TEST=build/boot google/reef w/o vboot, verify successful TPM init. Change-Id: Ic47e465db1c06d8b79a1f0a06906843149b6dacd Signed-off-by: Matt DeVillier <matt.devillier@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/68550 Reviewed-by: Alexandru Stan <amstan@chromium.org> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>