stm32_serial_driver 1424 drivers/tty/serial/stm32-usart.c static struct platform_driver stm32_serial_driver = { stm32_serial_driver 1445 drivers/tty/serial/stm32-usart.c ret = platform_driver_register(&stm32_serial_driver); stm32_serial_driver 1454 drivers/tty/serial/stm32-usart.c platform_driver_unregister(&stm32_serial_driver);