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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
* <>
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/pm.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
* struct of_dev_auxdata - lookup table entry for device names & platform_data
* @compatible: compatible value of node to match against node
* @phys_addr: Start address of registers to match against node
* @name: Name to assign for matching nodes
* @platform_data: platform_data to assign for matching nodes
* This lookup table allows the caller of of_platform_populate() to override
* the names of devices when creating devices from the device tree. The table
* should be terminated with an empty entry. It also allows the platform_data
* pointer to be set.
* The reason for this functionality is that some Linux infrastructure uses
* the device name to look up a specific device, but the Linux-specific names
* are not encoded into the device tree, so the kernel needs to provide specific
* values.
* Note: Using an auxdata lookup table should be considered a last resort when
* converting a platform to use the DT. Normally the automatically generated
* device name will not matter, and drivers should obtain data from the device
* node instead of from an anonymouns platform_data pointer.
struct of_dev_auxdata {
char *compatible;
resource_size_t phys_addr;
char *name;
void *platform_data;
/* Macro to simplify populating a lookup table */
#define OF_DEV_AUXDATA(_compat,_phys,_name,_pdata) \
{ .compatible = _compat, .phys_addr = _phys, .name = _name, \
.platform_data = _pdata }
* of_platform_driver - Legacy of-aware driver for platform devices.
* An of_platform_driver driver is attached to a basic platform_device on
* the ibm ebus (ibmebus_bus_type).
struct of_platform_driver
int (*probe)(struct platform_device* dev,
const struct of_device_id *match);
int (*remove)(struct platform_device* dev);
int (*suspend)(struct platform_device* dev, pm_message_t state);
int (*resume)(struct platform_device* dev);
int (*shutdown)(struct platform_device* dev);
struct device_driver driver;
#define to_of_platform_driver(drv) \
container_of(drv,struct of_platform_driver, driver)
extern const struct of_device_id of_default_bus_match_table[];
/* Platform drivers register/unregister */
extern struct platform_device *of_device_alloc(struct device_node *np,
const char *bus_id,
struct device *parent);
extern struct platform_device *of_find_device_by_node(struct device_node *np);
#if !defined(CONFIG_SPARC) /* SPARC has its own device registration method */
/* Platform devices and busses creation */
extern struct platform_device *of_platform_device_create(struct device_node *np,
const char *bus_id,
struct device *parent);
extern int of_platform_bus_probe(struct device_node *root,
const struct of_device_id *matches,
struct device *parent);
extern int of_platform_populate(struct device_node *root,
const struct of_device_id *matches,
const struct of_dev_auxdata *lookup,
struct device *parent);
#endif /* !CONFIG_SPARC */
#endif /* CONFIG_OF_DEVICE */
#endif /* _LINUX_OF_PLATFORM_H */