TPM_CRB_CTRL_START
if (!tpm_wait_for_u32(sc, TPM_CRB_CTRL_START,
WR4(sc, TPM_CRB_CTRL_START, TPM_CRB_CTRL_START_CMD);
bus_barrier(sc->mem_res, TPM_CRB_CTRL_START,
if (!tpm_wait_for_u32(sc, TPM_CRB_CTRL_START, mask, ~mask, timeout)) {