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include/linux/of_platform.h
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#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. * */ |
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#ifdef CONFIG_OF_DEVICE |
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#include <linux/module.h> #include <linux/device.h> #include <linux/mod_devicetable.h> #include <linux/pm.h> #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 * @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 } /** |
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* of_platform_driver - Legacy of-aware driver for platform devices. * * An of_platform_driver driver is attached to a basic platform_device on |
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* the ibm ebus (ibmebus_bus_type). |
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*/ struct of_platform_driver { |
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int (*probe)(struct platform_device* dev, |
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const struct of_device_id *match); |
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int (*remove)(struct platform_device* dev); |
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int (*suspend)(struct platform_device* dev, pm_message_t state); int (*resume)(struct platform_device* dev); int (*shutdown)(struct platform_device* dev); |
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struct device_driver driver; }; #define to_of_platform_driver(drv) \ container_of(drv,struct of_platform_driver, driver) |
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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, struct device *parent); |
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extern struct platform_device *of_find_device_by_node(struct device_node *np); |
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#if !defined(CONFIG_SPARC) /* SPARC has its own device registration method */ /* 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, struct device *parent); |
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extern int of_platform_bus_probe(struct device_node *root, const struct of_device_id *matches, struct device *parent); |
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extern int of_platform_populate(struct device_node *root, 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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#endif /* !CONFIG_SPARC */ |
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#endif /* CONFIG_OF_DEVICE */ |
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#endif /* _LINUX_OF_PLATFORM_H */ |