On Fri, Aug 14, 2020 at 01:12:21PM +0200, Jorge Ramirez-Ortiz wrote:
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
v9: params return value must be written before optee_msg_to_param is called v8: review fixes: fix types and add TEEC_ERROR_NOT_SUPPORTED to GP errors v7: add support for ten bit i2c slave addressing v6: compile out if CONFIG_I2C not enabled v5: alphabetic order of includes v4: remove unnecessary extra line in optee_msg.h v3: use from/to msg param to support all types of memory modify OPTEE_MSG_RPC_CMD_I2C_TRANSFER message id
drivers/tee/optee/optee_msg.h | 21 +++++++ drivers/tee/optee/optee_private.h | 1 + drivers/tee/optee/rpc.c | 95 +++++++++++++++++++++++++++++++ 3 files changed, 117 insertions(+)
Looks good. Did you test this with the recently merged https://github.com/OP-TEE/optee_os/pull/4033 ?
Cheers, Jens