Please Modify the API definition of static int cc256x_baudrate_cmd(void * config, uint32_t baudrate, uint8_t *hci_cmd_buffer), due to the fact that, Function argument void *config is not used with in the Function definition.

To support the Comment #1

Either you can change the Function definition, which uses the void *config or you can change the API signature as static int cc256x_baudrate_cmd(uint32_t baudrate, uint8_t *hci_cmd_buffer).