tpm: Create a tpm_class_ops structure and use it in the drivers

This replaces the static initialization of a tpm_vendor_specific
structure in the drivers with the standard Linux idiom of providing
a const structure of function pointers.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com>
Reviewed-by: Ashley Lai <adlai@linux.vnet.ibm.com>
[phuewe: did apply manually due to commit
191ffc6bde3 tpm/tpm_i2c_atmel: fix coccinelle warnings]
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 9a9051bb1a03..fff1d0976f80 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -29,6 +29,18 @@
  */
 #define TPM_ANY_NUM 0xFFFF
 
+struct tpm_chip;
+
+struct tpm_class_ops {
+        const u8 req_complete_mask;
+        const u8 req_complete_val;
+        bool (*req_canceled)(struct tpm_chip *chip, u8 status);
+        int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
+        int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
+        void (*cancel) (struct tpm_chip *chip);
+        u8 (*status) (struct tpm_chip *chip);
+};
+
 #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
 
 extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);