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57fee4a58f
Now platform_device is being widely used on SoC processors where the peripherals are attached to the system bus, which is simple enough. However, silicon IPs for these SoCs are usually shared heavily across a family of processors, even products from different companies. This makes the original simple driver name based matching insufficient, or simply not straight-forward. Introduce a module id table for platform devices, and makes it clear that a platform driver is able to support some shared IP and handle slight differences across different platforms (by 'driver_data'). Module alias is handled automatically when a MODULE_DEVICE_TABLE() is defined. To not disturb the current platform drivers too much, the matched id entry is recorded and can be retrieved by platform_get_device_id(). Signed-off-by: Eric Miao <eric.miao@marvell.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/*
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* platform_device.h - generic, centralized driver model
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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*
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* This file is released under the GPLv2
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*
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* See Documentation/driver-model/ for more information.
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*/
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#ifndef _PLATFORM_DEVICE_H_
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#define _PLATFORM_DEVICE_H_
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct platform_device {
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const char * name;
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int id;
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struct device dev;
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u32 num_resources;
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struct resource * resource;
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struct platform_device_id *id_entry;
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};
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#define platform_get_device_id(pdev) ((pdev)->id_entry)
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#define to_platform_device(x) container_of((x), struct platform_device, dev)
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extern int platform_device_register(struct platform_device *);
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extern void platform_device_unregister(struct platform_device *);
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extern struct bus_type platform_bus_type;
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extern struct device platform_bus;
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extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
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extern int platform_get_irq(struct platform_device *, unsigned int);
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extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);
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extern int platform_get_irq_byname(struct platform_device *, char *);
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extern int platform_add_devices(struct platform_device **, int);
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extern struct platform_device *platform_device_register_simple(const char *, int id,
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struct resource *, unsigned int);
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extern struct platform_device *platform_device_register_data(struct device *,
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const char *, int, const void *, size_t);
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extern struct platform_device *platform_device_alloc(const char *name, int id);
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extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
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extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
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extern int platform_device_add(struct platform_device *pdev);
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extern void platform_device_del(struct platform_device *pdev);
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extern void platform_device_put(struct platform_device *pdev);
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struct platform_driver {
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int (*probe)(struct platform_device *);
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int (*remove)(struct platform_device *);
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void (*shutdown)(struct platform_device *);
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int (*suspend)(struct platform_device *, pm_message_t state);
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int (*suspend_late)(struct platform_device *, pm_message_t state);
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int (*resume_early)(struct platform_device *);
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int (*resume)(struct platform_device *);
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struct device_driver driver;
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struct platform_device_id *id_table;
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};
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extern int platform_driver_register(struct platform_driver *);
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extern void platform_driver_unregister(struct platform_driver *);
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/* non-hotpluggable platform devices may use this so that probe() and
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* its support may live in __init sections, conserving runtime memory.
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*/
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extern int platform_driver_probe(struct platform_driver *driver,
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int (*probe)(struct platform_device *));
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#define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev)
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#define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data))
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#endif /* _PLATFORM_DEVICE_H_ */
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