[S] Change in coreboot[4.18_branch]: drivers/tpm: Move TPM init to end of device init phase

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/68600 )

Change subject: drivers/tpm: Move TPM init to end of device init phase
......................................................................

drivers/tpm: Move TPM init to end of device init phase

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 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68600
Tested-by: build bot (Jenkins) 
Reviewed-by: Angel Pons 
---
M src/drivers/tpm/tpm.c
1 file changed, 23 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved

diff --git a/src/drivers/tpm/tpm.c b/src/drivers/tpm/tpm.c
index ce1a2b7..3b582c8 100644
--- a/src/drivers/tpm/tpm.c
+++ b/src/drivers/tpm/tpm.c
@@ -10,4 +10,4 @@
    tpm_setup(s3resume);
 }

-BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, init_tpm_dev, NULL);
+BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT, init_tpm_dev, NULL);