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84 lines
2.3 KiB
84 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2015 Pengutronix, Uwe Kleine-König <[email protected]> |
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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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void (*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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