137 строки
4.4 KiB
C
137 строки
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
#ifndef _LINUX_OF_PLATFORM_H
|
|
#define _LINUX_OF_PLATFORM_H
|
|
/*
|
|
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
|
|
* <benh@kernel.crashing.org>
|
|
*/
|
|
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
struct device;
|
|
struct of_device_id;
|
|
|
|
/**
|
|
* 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 anonymous 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 }
|
|
|
|
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 int of_device_add(struct platform_device *pdev);
|
|
extern int of_device_register(struct platform_device *ofdev);
|
|
extern void of_device_unregister(struct platform_device *ofdev);
|
|
|
|
#ifdef CONFIG_OF
|
|
extern struct platform_device *of_find_device_by_node(struct device_node *np);
|
|
#else
|
|
static inline struct platform_device *of_find_device_by_node(struct device_node *np)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
extern int of_platform_bus_probe(struct device_node *root,
|
|
const struct of_device_id *matches,
|
|
struct device *parent);
|
|
|
|
#ifdef CONFIG_OF_ADDRESS
|
|
/* 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_device_destroy(struct device *dev, void *data);
|
|
|
|
extern int of_platform_populate(struct device_node *root,
|
|
const struct of_device_id *matches,
|
|
const struct of_dev_auxdata *lookup,
|
|
struct device *parent);
|
|
extern int of_platform_default_populate(struct device_node *root,
|
|
const struct of_dev_auxdata *lookup,
|
|
struct device *parent);
|
|
extern void of_platform_depopulate(struct device *parent);
|
|
|
|
extern int devm_of_platform_populate(struct device *dev);
|
|
|
|
extern void devm_of_platform_depopulate(struct device *dev);
|
|
#else
|
|
/* Platform devices and busses creation */
|
|
static inline struct platform_device *of_platform_device_create(struct device_node *np,
|
|
const char *bus_id,
|
|
struct device *parent)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline int of_platform_device_destroy(struct device *dev, void *data)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int of_platform_populate(struct device_node *root,
|
|
const struct of_device_id *matches,
|
|
const struct of_dev_auxdata *lookup,
|
|
struct device *parent)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
static inline int of_platform_default_populate(struct device_node *root,
|
|
const struct of_dev_auxdata *lookup,
|
|
struct device *parent)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
static inline void of_platform_depopulate(struct device *parent) { }
|
|
|
|
static inline int devm_of_platform_populate(struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void devm_of_platform_depopulate(struct device *dev) { }
|
|
#endif
|
|
|
|
#if defined(CONFIG_OF_DYNAMIC) && defined(CONFIG_OF_ADDRESS)
|
|
extern void of_platform_register_reconfig_notifier(void);
|
|
#else
|
|
static inline void of_platform_register_reconfig_notifier(void) { }
|
|
#endif
|
|
|
|
#endif /* _LINUX_OF_PLATFORM_H */
|