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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/of_platform.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/of_platform.h')
-rw-r--r-- | include/linux/of_platform.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h new file mode 100644 index 00000000..b47d2040 --- /dev/null +++ b/include/linux/of_platform.h @@ -0,0 +1,112 @@ +#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. + * + */ + +#ifdef CONFIG_OF_DEVICE +#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); + +#ifdef CONFIG_OF_ADDRESS /* device reg helpers depend on 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_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_OF_ADDRESS */ + +#endif /* CONFIG_OF_DEVICE */ + +#if !defined(CONFIG_OF_ADDRESS) +struct of_dev_auxdata; +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; +} +#endif /* !CONFIG_OF_ADDRESS */ + +#endif /* _LINUX_OF_PLATFORM_H */ |