1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Serial core controller driver 4 * 5 * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/ 6 * Author: Tony Lindgren <tony@atomide.com> 7 * 8 * This driver manages the serial core controller struct device instances. 9 * The serial core controller devices are children of the physical serial 10 * port device. 11 */ 12 13 #include <linux/device.h> 14 #include <linux/module.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/serial_core.h> 17 #include <linux/spinlock.h> 18 19 #include "serial_base.h" 20 21 static int serial_ctrl_probe(struct device *dev) 22 { 23 pm_runtime_enable(dev); 24 25 return 0; 26 } 27 28 static int serial_ctrl_remove(struct device *dev) 29 { 30 pm_runtime_disable(dev); 31 32 return 0; 33 } 34 35 /* 36 * Serial core controller device init functions. Note that the physical 37 * serial port device driver may not have completed probe at this point. 38 */ 39 int serial_ctrl_register_port(struct uart_driver *drv, struct uart_port *port) 40 { 41 return serial_core_register_port(drv, port); 42 } 43 44 void serial_ctrl_unregister_port(struct uart_driver *drv, struct uart_port *port) 45 { 46 serial_core_unregister_port(drv, port); 47 } 48 49 static struct device_driver serial_ctrl_driver = { 50 .name = "ctrl", 51 .suppress_bind_attrs = true, 52 .probe = serial_ctrl_probe, 53 .remove = serial_ctrl_remove, 54 }; 55 56 int serial_base_ctrl_init(void) 57 { 58 return serial_base_driver_register(&serial_ctrl_driver); 59 } 60 61 void serial_base_ctrl_exit(void) 62 { 63 serial_base_driver_unregister(&serial_ctrl_driver); 64 } 65 66 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 67 MODULE_DESCRIPTION("Serial core controller driver"); 68 MODULE_LICENSE("GPL"); 69