diff options
| author | Jorge Ramirez-Ortiz <jorge@foundries.io> | 2020-08-14 13:12:21 +0200 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2020-08-21 11:41:45 +0200 |
| commit | c05210ab975771e161427eb47696b869d820bdaf (patch) | |
| tree | a2c858ff2aa873c31a4c7882702c992cdce9d0b5 /drivers/tee/optee/optee_msg.h | |
| parent | 9123e3a74ec7b934a4a099e98af6a61c2f80bbf5 (diff) | |
drivers: optee: allow op-tee to access devices on the i2c bus
Some secure elements like NXP's SE050 sit on I2C buses. For OP-TEE to
control this type of cryptographic devices it needs coordinated access
to the bus, so collisions and RUNTIME_PM dont get in the way.
This trampoline driver allow OP-TEE to access them.
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee/optee_msg.h')
| -rw-r--r-- | drivers/tee/optee/optee_msg.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h index 795bc19ae17a..7b2d919da2ac 100644 --- a/drivers/tee/optee/optee_msg.h +++ b/drivers/tee/optee/optee_msg.h @@ -419,4 +419,25 @@ struct optee_msg_arg { */ #define OPTEE_MSG_RPC_CMD_SHM_FREE 7 +/* + * Access a device on an i2c bus + * + * [in] param[0].u.value.a mode: RD(0), WR(1) + * [in] param[0].u.value.b i2c adapter + * [in] param[0].u.value.c i2c chip + * + * [in] param[1].u.value.a i2c control flags + * + * [in/out] memref[2] buffer to exchange the transfer data + * with the secure world + * + * [out] param[3].u.value.a bytes transferred by the driver + */ +#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER 21 +/* I2C master transfer modes */ +#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER_RD 0 +#define OPTEE_MSG_RPC_CMD_I2C_TRANSFER_WR 1 +/* I2C master control flags */ +#define OPTEE_MSG_RPC_CMD_I2C_FLAGS_TEN_BIT BIT(0) + #endif /* _OPTEE_MSG_H */ |