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102 lines
3.6 KiB
102 lines
3.6 KiB
#ifndef _LINUX_OF_PLATFORM_H |
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#define _LINUX_OF_PLATFORM_H |
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/* |
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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. |
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* <[email protected]> |
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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/device.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/pm.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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/** |
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* struct of_dev_auxdata - lookup table entry for device names & platform_data |
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* @compatible: compatible value of node to match against node |
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* @phys_addr: Start address of registers to match against node |
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* @name: Name to assign for matching nodes |
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* @platform_data: platform_data to assign for matching nodes |
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* |
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* This lookup table allows the caller of of_platform_populate() to override |
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* the names of devices when creating devices from the device tree. The table |
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* should be terminated with an empty entry. It also allows the platform_data |
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* pointer to be set. |
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* |
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* The reason for this functionality is that some Linux infrastructure uses |
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* the device name to look up a specific device, but the Linux-specific names |
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* are not encoded into the device tree, so the kernel needs to provide specific |
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* values. |
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* |
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* Note: Using an auxdata lookup table should be considered a last resort when |
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* converting a platform to use the DT. Normally the automatically generated |
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* device name will not matter, and drivers should obtain data from the device |
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* node instead of from an anonymous platform_data pointer. |
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*/ |
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struct of_dev_auxdata { |
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char *compatible; |
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resource_size_t phys_addr; |
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char *name; |
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void *platform_data; |
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}; |
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/* Macro to simplify populating a lookup table */ |
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#define OF_DEV_AUXDATA(_compat,_phys,_name,_pdata) \ |
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{ .compatible = _compat, .phys_addr = _phys, .name = _name, \ |
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.platform_data = _pdata } |
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extern const struct of_device_id of_default_bus_match_table[]; |
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/* Platform drivers register/unregister */ |
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extern struct platform_device *of_device_alloc(struct device_node *np, |
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const char *bus_id, |
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struct device *parent); |
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extern struct platform_device *of_find_device_by_node(struct device_node *np); |
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/* Platform devices and busses creation */ |
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extern struct platform_device *of_platform_device_create(struct device_node *np, |
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const char *bus_id, |
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struct device *parent); |
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extern int of_platform_bus_probe(struct device_node *root, |
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const struct of_device_id *matches, |
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struct device *parent); |
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#ifdef CONFIG_OF_ADDRESS |
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extern int of_platform_populate(struct device_node *root, |
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const struct of_device_id *matches, |
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const struct of_dev_auxdata *lookup, |
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struct device *parent); |
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extern int of_platform_default_populate(struct device_node *root, |
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const struct of_dev_auxdata *lookup, |
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struct device *parent); |
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extern void of_platform_depopulate(struct device *parent); |
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#else |
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static inline int of_platform_populate(struct device_node *root, |
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const struct of_device_id *matches, |
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const struct of_dev_auxdata *lookup, |
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struct device *parent) |
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{ |
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return -ENODEV; |
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} |
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static inline int of_platform_default_populate(struct device_node *root, |
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const struct of_dev_auxdata *lookup, |
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struct device *parent) |
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{ |
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return -ENODEV; |
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} |
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static inline void of_platform_depopulate(struct device *parent) { } |
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#endif |
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#if defined(CONFIG_OF_DYNAMIC) && defined(CONFIG_OF_ADDRESS) |
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extern void of_platform_register_reconfig_notifier(void); |
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#else |
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static inline void of_platform_register_reconfig_notifier(void) { } |
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#endif |
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#endif /* _LINUX_OF_PLATFORM_H */
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