/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de> */ #include <linux/device.h> #define to_siox_device(_dev) container_of((_dev), struct siox_device, dev) struct siox_device { struct list_head node; /* node in smaster->devices */ struct siox_master *smaster; struct device dev; const char *type; size_t inbytes; size_t outbytes; u8 statustype; u8 status_read_clean; u8 status_written; u8 status_written_lastcycle; bool connected; /* statistics */ unsigned int watchdog_errors; unsigned int status_errors; struct kernfs_node *status_errors_kn; struct kernfs_node *watchdog_kn; struct kernfs_node *watchdog_errors_kn; struct kernfs_node *connected_kn; }; bool siox_device_synced(struct siox_device *sdevice); bool siox_device_connected(struct siox_device *sdevice); struct siox_driver { int (*probe)(struct siox_device *sdevice); int (*remove)(struct siox_device *sdevice); void (*shutdown)(struct siox_device *sdevice); /* * buf is big enough to hold sdev->inbytes - 1 bytes, the status byte * is in the scope of the framework. */ int (*set_data)(struct siox_device *sdevice, u8 status, u8 buf[]); /* * buf is big enough to hold sdev->outbytes - 1 bytes, the status byte * is in the scope of the framework */ int (*get_data)(struct siox_device *sdevice, const u8 buf[]); struct device_driver driver; }; static inline struct siox_driver *to_siox_driver(struct device_driver *driver) { if (driver) return container_of(driver, struct siox_driver, driver); else return NULL; } int __siox_driver_register(struct siox_driver *sdriver, struct module *owner); static inline int siox_driver_register(struct siox_driver *sdriver) { return __siox_driver_register(sdriver, THIS_MODULE); } static inline void siox_driver_unregister(struct siox_driver *sdriver) { return driver_unregister(&sdriver->driver); } /* * module_siox_driver() - Helper macro for drivers that don't do * anything special in module init/exit. This eliminates a lot of * boilerplate. Each module may only use this macro once, and * calling it replaces module_init() and module_exit() */ #define module_siox_driver(__siox_driver) \ module_driver(__siox_driver, siox_driver_register, \ siox_driver_unregister)