[RFC 1/4] tpm_crb: Add definition of TPM CRB chunking fields

[Arun Menon <armenon@redhat.com>]

- Add 2 new registers for invoking the start method
  and add CRB_INTF_CAP_CRB_CHUNK as the new TCG TPM
  specifies this CRB Interface Identifier that decides
  if chunking is allowed.
- Refer section 6.4.2.2 of the specification document [1]

[1] https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_rc1_121225.pdf

Signed-off-by: Arun Menon <armenon@redhat.com>
---
 drivers/char/tpm/tpm_crb.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 6c25305c256ef..67c0061d4cab7 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -56,12 +56,18 @@ enum crb_ctrl_sts {
 
 enum crb_start {
 	CRB_START_INVOKE	= BIT(0),
+	CRB_START_RESP_RETRY = BIT(1),
+	CRB_START_NEXT_CHUNK = BIT(2),
 };
 
 enum crb_cancel {
 	CRB_CANCEL_INVOKE	= BIT(0),
 };
 
+enum crb_intf {
+	CRB_INTF_CAP_CRB_CHUNK = BIT(10),
+};
+
 struct crb_regs_head {
 	u32 loc_state;
 	u32 reserved1;
-- 
2.53.0