TPM_INT_STS
reg = TPM_READ_4(sc->dev, TPM_INT_STS);
TPM_WRITE_4(sc->dev, TPM_INT_STS, reg);
status = TPM_READ_4(sc->dev, TPM_INT_STS);
TPM_WRITE_4(sc->dev, TPM_INT_STS, status);
AND4(sc, TPM_INT_STS, TPM_READ_4(sc->dev, TPM_INT_STS));