#ifndef _LINUX_OF_PLATFORM_H #define _LINUX_OF_PLATFORM_H /* * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. * <benh@kernel.crashing.org> * * 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 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 struct platform_device *of_find_device_by_node(struct device_node *np); /* 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); #ifdef CONFIG_OF_ADDRESS 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); #else 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) { } #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 */