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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/of_platform.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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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')
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1 files changed, 112 insertions, 0 deletions
diff --git a/include/linux/of_platform.h b/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.
+ *
+ */
+
+#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 */