131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/*
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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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* and Arnd Bergmann, IBM Corp.
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* Merged from powerpc/kernel/of_platform.c and
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* sparc{,64}/kernel/of_device.c by Stephen Rothwell
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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extern struct device_attribute of_platform_device_attrs[];
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static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct of_device *of_dev = to_of_device(dev);
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struct of_platform_driver *of_drv = to_of_platform_driver(drv);
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const struct of_device_id *matches = of_drv->match_table;
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if (!matches)
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return 0;
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return of_match_device(matches, of_dev) != NULL;
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}
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static int of_platform_device_probe(struct device *dev)
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{
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int error = -ENODEV;
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struct of_platform_driver *drv;
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struct of_device *of_dev;
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const struct of_device_id *match;
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drv = to_of_platform_driver(dev->driver);
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of_dev = to_of_device(dev);
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if (!drv->probe)
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return error;
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of_dev_get(of_dev);
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match = of_match_device(drv->match_table, of_dev);
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if (match)
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error = drv->probe(of_dev, match);
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if (error)
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of_dev_put(of_dev);
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return error;
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}
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static int of_platform_device_remove(struct device *dev)
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{
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struct of_device *of_dev = to_of_device(dev);
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struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
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if (dev->driver && drv->remove)
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drv->remove(of_dev);
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return 0;
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}
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static int of_platform_device_suspend(struct device *dev, pm_message_t state)
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{
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struct of_device *of_dev = to_of_device(dev);
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struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
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int error = 0;
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if (dev->driver && drv->suspend)
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error = drv->suspend(of_dev, state);
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return error;
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}
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static int of_platform_device_resume(struct device * dev)
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{
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struct of_device *of_dev = to_of_device(dev);
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struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
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int error = 0;
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if (dev->driver && drv->resume)
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error = drv->resume(of_dev);
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return error;
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}
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static void of_platform_device_shutdown(struct device *dev)
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{
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struct of_device *of_dev = to_of_device(dev);
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struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
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if (dev->driver && drv->shutdown)
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drv->shutdown(of_dev);
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}
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int of_bus_type_init(struct bus_type *bus, const char *name)
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{
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bus->name = name;
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bus->match = of_platform_bus_match;
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bus->probe = of_platform_device_probe;
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bus->remove = of_platform_device_remove;
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bus->suspend = of_platform_device_suspend;
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bus->resume = of_platform_device_resume;
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bus->shutdown = of_platform_device_shutdown;
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bus->dev_attrs = of_platform_device_attrs;
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return bus_register(bus);
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}
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int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
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{
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/* initialize common driver fields */
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if (!drv->driver.name)
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drv->driver.name = drv->name;
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if (!drv->driver.owner)
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drv->driver.owner = drv->owner;
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drv->driver.bus = bus;
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/* register with core */
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return driver_register(&drv->driver);
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}
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EXPORT_SYMBOL(of_register_driver);
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void of_unregister_driver(struct of_platform_driver *drv)
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{
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driver_unregister(&drv->driver);
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}
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EXPORT_SYMBOL(of_unregister_driver);
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