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