diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2021-02-09 16:09:32 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2021-02-09 16:10:49 +0100 |
| commit | d0236f17c31981b07f21eb824da10fabc7f0d8f8 (patch) | |
| tree | ea775a6f292c9a87a6edcb5a78670ec7d9c08009 /drivers/tee | |
| parent | 7deff441f53cc148cbf18381bd252a754b0d7d4e (diff) | |
| parent | 67bc809752796acb2641ca343cad5b45eef31d7c (diff) | |
| download | linux-d0236f17c31981b07f21eb824da10fabc7f0d8f8.tar.bz2 | |
Merge tag 'optee-simplify-i2c-access_for-v5.12' of git://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers
Simplify i2c acess in OP-TEE driver
* tag 'optee-simplify-i2c-access_for-v5.12' of git://git.linaro.org/people/jens.wiklander/linux-tee:
optee: simplify i2c access
Link: https://lore.kernel.org/soc/20210208125853.GA288348%40jade
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/optee/rpc.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c index a0c30b664e53..1849180b0278 100644 --- a/drivers/tee/optee/rpc.c +++ b/drivers/tee/optee/rpc.c @@ -55,8 +55,9 @@ bad: static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx, struct optee_msg_arg *arg) { - struct i2c_client client = { 0 }; struct tee_param *params; + struct i2c_adapter *adapter; + struct i2c_msg msg = { }; size_t i; int ret = -EOPNOTSUPP; u8 attr[] = { @@ -86,48 +87,48 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx, goto bad; } - client.adapter = i2c_get_adapter(params[0].u.value.b); - if (!client.adapter) + adapter = i2c_get_adapter(params[0].u.value.b); + if (!adapter) goto bad; if (params[1].u.value.a & OPTEE_RPC_I2C_FLAGS_TEN_BIT) { - if (!i2c_check_functionality(client.adapter, + if (!i2c_check_functionality(adapter, I2C_FUNC_10BIT_ADDR)) { - i2c_put_adapter(client.adapter); + i2c_put_adapter(adapter); goto bad; } - client.flags = I2C_CLIENT_TEN; + msg.flags = I2C_M_TEN; } - client.addr = params[0].u.value.c; - snprintf(client.name, I2C_NAME_SIZE, "i2c%d", client.adapter->nr); + msg.addr = params[0].u.value.c; + msg.buf = params[2].u.memref.shm->kaddr; + msg.len = params[2].u.memref.size; switch (params[0].u.value.a) { case OPTEE_RPC_I2C_TRANSFER_RD: - ret = i2c_master_recv(&client, params[2].u.memref.shm->kaddr, - params[2].u.memref.size); + msg.flags |= I2C_M_RD; break; case OPTEE_RPC_I2C_TRANSFER_WR: - ret = i2c_master_send(&client, params[2].u.memref.shm->kaddr, - params[2].u.memref.size); break; default: - i2c_put_adapter(client.adapter); + i2c_put_adapter(adapter); goto bad; } + ret = i2c_transfer(adapter, &msg, 1); + if (ret < 0) { arg->ret = TEEC_ERROR_COMMUNICATION; } else { - params[3].u.value.a = ret; + params[3].u.value.a = msg.len; if (optee_to_msg_param(arg->params, arg->num_params, params)) arg->ret = TEEC_ERROR_BAD_PARAMETERS; else arg->ret = TEEC_SUCCESS; } - i2c_put_adapter(client.adapter); + i2c_put_adapter(adapter); kfree(params); return; bad: |