[deliverable/linux.git] / drivers / of / platform.c

/*
 *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
 *			 <benh@kernel.crashing.org>
 *    and		 Arnd Bergmann, IBM Corp.
 *    Merged from powerpc/kernel/of_platform.c and
 *    sparc{,64}/kernel/of_device.c by Stephen Rothwell
 *
 *  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/errno.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>

static int of_dev_node_match(struct device *dev, void *data)
{
	return dev->of_node == data;
}

/**
 * of_find_device_by_node - Find the platform_device associated with a node
 * @np: Pointer to device tree node
 *
 * Returns platform_device pointer, or NULL if not found
 */
struct platform_device *of_find_device_by_node(struct device_node *np)
{
	struct device *dev;

	dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
	return dev ? to_platform_device(dev) : NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);

static int platform_driver_probe_shim(struct platform_device *pdev)
{
	struct platform_driver *pdrv;
	struct of_platform_driver *ofpdrv;
	const struct of_device_id *match;

	pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
	ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);

	/* There is an unlikely chance that an of_platform driver might match
	 * on a non-OF platform device.  If so, then of_match_device() will
	 * come up empty.  Return -EINVAL in this case so other drivers get
	 * the chance to bind. */
	match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
	return match ? ofpdrv->probe(pdev, match) : -EINVAL;
}

static void platform_driver_shutdown_shim(struct platform_device *pdev)
{
	struct platform_driver *pdrv;
	struct of_platform_driver *ofpdrv;

	pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
	ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);
	ofpdrv->shutdown(pdev);
}

/**
 * of_register_platform_driver
 */
int of_register_platform_driver(struct of_platform_driver *drv)
{
	/* setup of_platform_driver to platform_driver adaptors */
	drv->platform_driver.driver = drv->driver;
	if (drv->probe)
		drv->platform_driver.probe = platform_driver_probe_shim;
	drv->platform_driver.remove = drv->remove;
	if (drv->shutdown)
		drv->platform_driver.shutdown = platform_driver_shutdown_shim;
	drv->platform_driver.suspend = drv->suspend;
	drv->platform_driver.resume = drv->resume;

	return platform_driver_register(&drv->platform_driver);
}
EXPORT_SYMBOL(of_register_platform_driver);

void of_unregister_platform_driver(struct of_platform_driver *drv)
{
	platform_driver_unregister(&drv->platform_driver);
}
EXPORT_SYMBOL(of_unregister_platform_driver);

#if defined(CONFIG_PPC_DCR)
#include <asm/dcr.h>
#endif

extern struct device_attribute of_platform_device_attrs[];

static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
{
	const struct of_device_id *matches = drv->of_match_table;

	if (!matches)
		return 0;

	return of_match_device(matches, dev) != NULL;
}

static int of_platform_device_probe(struct device *dev)
{
	int error = -ENODEV;
	struct of_platform_driver *drv;
	struct platform_device *of_dev;
	const struct of_device_id *match;

	drv = to_of_platform_driver(dev->driver);
	of_dev = to_platform_device(dev);

	if (!drv->probe)
		return error;

	of_dev_get(of_dev);

	match = of_match_device(drv->driver.of_match_table, dev);
	if (match)
		error = drv->probe(of_dev, match);
	if (error)
		of_dev_put(of_dev);

	return error;
}

static int of_platform_device_remove(struct device *dev)
{
	struct platform_device *of_dev = to_platform_device(dev);
	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);

	if (dev->driver && drv->remove)
		drv->remove(of_dev);
	return 0;
}

static void of_platform_device_shutdown(struct device *dev)
{
	struct platform_device *of_dev = to_platform_device(dev);
	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);

	if (dev->driver && drv->shutdown)
		drv->shutdown(of_dev);
}

#ifdef CONFIG_PM_SLEEP

static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg)
{
	struct platform_device *of_dev = to_platform_device(dev);
	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
	int ret = 0;

	if (dev->driver && drv->suspend)
		ret = drv->suspend(of_dev, mesg);
	return ret;
}

static int of_platform_legacy_resume(struct device *dev)
{
	struct platform_device *of_dev = to_platform_device(dev);
	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
	int ret = 0;

	if (dev->driver && drv->resume)
		ret = drv->resume(of_dev);
	return ret;
}

static int of_platform_pm_prepare(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (drv && drv->pm && drv->pm->prepare)
		ret = drv->pm->prepare(dev);

	return ret;
}

static void of_platform_pm_complete(struct device *dev)
{
	struct device_driver *drv = dev->driver;

	if (drv && drv->pm && drv->pm->complete)
		drv->pm->complete(dev);
}

#ifdef CONFIG_SUSPEND

static int of_platform_pm_suspend(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->suspend)
			ret = drv->pm->suspend(dev);
	} else {
		ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND);
	}

	return ret;
}

static int of_platform_pm_suspend_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->suspend_noirq)
			ret = drv->pm->suspend_noirq(dev);
	}

	return ret;
}

static int of_platform_pm_resume(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->resume)
			ret = drv->pm->resume(dev);
	} else {
		ret = of_platform_legacy_resume(dev);
	}

	return ret;
}

static int of_platform_pm_resume_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->resume_noirq)
			ret = drv->pm->resume_noirq(dev);
	}

	return ret;
}

#else /* !CONFIG_SUSPEND */

#define of_platform_pm_suspend		NULL
#define of_platform_pm_resume		NULL
#define of_platform_pm_suspend_noirq	NULL
#define of_platform_pm_resume_noirq	NULL

#endif /* !CONFIG_SUSPEND */

#ifdef CONFIG_HIBERNATION

static int of_platform_pm_freeze(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->freeze)
			ret = drv->pm->freeze(dev);
	} else {
		ret = of_platform_legacy_suspend(dev, PMSG_FREEZE);
	}

	return ret;
}

static int of_platform_pm_freeze_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->freeze_noirq)
			ret = drv->pm->freeze_noirq(dev);
	}

	return ret;
}

static int of_platform_pm_thaw(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->thaw)
			ret = drv->pm->thaw(dev);
	} else {
		ret = of_platform_legacy_resume(dev);
	}

	return ret;
}

static int of_platform_pm_thaw_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->thaw_noirq)
			ret = drv->pm->thaw_noirq(dev);
	}

	return ret;
}

static int of_platform_pm_poweroff(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->poweroff)
			ret = drv->pm->poweroff(dev);
	} else {
		ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE);
	}

	return ret;
}

static int of_platform_pm_poweroff_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->poweroff_noirq)
			ret = drv->pm->poweroff_noirq(dev);
	}

	return ret;
}

static int of_platform_pm_restore(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->restore)
			ret = drv->pm->restore(dev);
	} else {
		ret = of_platform_legacy_resume(dev);
	}

	return ret;
}

static int of_platform_pm_restore_noirq(struct device *dev)
{
	struct device_driver *drv = dev->driver;
	int ret = 0;

	if (!drv)
		return 0;

	if (drv->pm) {
		if (drv->pm->restore_noirq)
			ret = drv->pm->restore_noirq(dev);
	}

	return ret;
}

#else /* !CONFIG_HIBERNATION */

#define of_platform_pm_freeze		NULL
#define of_platform_pm_thaw		NULL
#define of_platform_pm_poweroff		NULL
#define of_platform_pm_restore		NULL
#define of_platform_pm_freeze_noirq	NULL
#define of_platform_pm_thaw_noirq		NULL
#define of_platform_pm_poweroff_noirq	NULL
#define of_platform_pm_restore_noirq	NULL

#endif /* !CONFIG_HIBERNATION */

static struct dev_pm_ops of_platform_dev_pm_ops = {
	.prepare = of_platform_pm_prepare,
	.complete = of_platform_pm_complete,
	.suspend = of_platform_pm_suspend,
	.resume = of_platform_pm_resume,
	.freeze = of_platform_pm_freeze,
	.thaw = of_platform_pm_thaw,
	.poweroff = of_platform_pm_poweroff,
	.restore = of_platform_pm_restore,
	.suspend_noirq = of_platform_pm_suspend_noirq,
	.resume_noirq = of_platform_pm_resume_noirq,
	.freeze_noirq = of_platform_pm_freeze_noirq,
	.thaw_noirq = of_platform_pm_thaw_noirq,
	.poweroff_noirq = of_platform_pm_poweroff_noirq,
	.restore_noirq = of_platform_pm_restore_noirq,
};

#define OF_PLATFORM_PM_OPS_PTR	(&of_platform_dev_pm_ops)

#else /* !CONFIG_PM_SLEEP */

#define OF_PLATFORM_PM_OPS_PTR	NULL

#endif /* !CONFIG_PM_SLEEP */

int of_bus_type_init(struct bus_type *bus, const char *name)
{
	bus->name = name;
	bus->match = of_platform_bus_match;
	bus->probe = of_platform_device_probe;
	bus->remove = of_platform_device_remove;
	bus->shutdown = of_platform_device_shutdown;
	bus->dev_attrs = of_platform_device_attrs;
	bus->pm = OF_PLATFORM_PM_OPS_PTR;
	return bus_register(bus);
}

int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
{
	/*
	 * Temporary: of_platform_bus used to be distinct from the platform
	 * bus.  It isn't anymore, and so drivers on the platform bus need
	 * to be registered in a special way.
	 *
	 * After all of_platform_bus_type drivers are converted to
	 * platform_drivers, this exception can be removed.
	 */
	if (bus == &platform_bus_type)
		return of_register_platform_driver(drv);

	/* register with core */
	drv->driver.bus = bus;
	return driver_register(&drv->driver);
}
EXPORT_SYMBOL(of_register_driver);

void of_unregister_driver(struct of_platform_driver *drv)
{
	if (drv->driver.bus == &platform_bus_type)
		of_unregister_platform_driver(drv);
	else
		driver_unregister(&drv->driver);
}
EXPORT_SYMBOL(of_unregister_driver);

#if !defined(CONFIG_SPARC)
/*
 * The following routines scan a subtree and registers a device for
 * each applicable node.
 *
 * Note: sparc doesn't use these routines because it has a different
 * mechanism for creating devices from device tree nodes.
 */

/**
 * of_device_make_bus_id - Use the device node data to assign a unique name
 * @dev: pointer to device structure that is linked to a device tree node
 *
 * This routine will first try using either the dcr-reg or the reg property
 * value to derive a unique name.  As a last resort it will use the node
 * name followed by a unique number.
 */
static void of_device_make_bus_id(struct device *dev)
{
	static atomic_t bus_no_reg_magic;
	struct device_node *node = dev->of_node;
	const u32 *reg;
	u64 addr;
	int magic;

#ifdef CONFIG_PPC_DCR
	/*
	 * If it's a DCR based device, use 'd' for native DCRs
	 * and 'D' for MMIO DCRs.
	 */
	reg = of_get_property(node, "dcr-reg", NULL);
	if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
		dev_set_name(dev, "d%x.%s", *reg, node->name);
#else /* CONFIG_PPC_DCR_NATIVE */
		u64 addr = of_translate_dcr_address(node, *reg, NULL);
		if (addr != OF_BAD_ADDR) {
			dev_set_name(dev, "D%llx.%s",
				     (unsigned long long)addr, node->name);
			return;
		}
#endif /* !CONFIG_PPC_DCR_NATIVE */
	}
#endif /* CONFIG_PPC_DCR */

	/*
	 * For MMIO, get the physical address
	 */
	reg = of_get_property(node, "reg", NULL);
	if (reg) {
		addr = of_translate_address(node, reg);
		if (addr != OF_BAD_ADDR) {
			dev_set_name(dev, "%llx.%s",
				     (unsigned long long)addr, node->name);
			return;
		}
	}

	/*
	 * No BusID, use the node name and add a globally incremented
	 * counter (and pray...)
	 */
	magic = atomic_add_return(1, &bus_no_reg_magic);
	dev_set_name(dev, "%s.%d", node->name, magic - 1);
}

/**
 * of_device_alloc - Allocate and initialize an of_device
 * @np: device node to assign to device
 * @bus_id: Name to assign to the device.  May be null to use default name.
 * @parent: Parent device.
 */
struct platform_device *of_device_alloc(struct device_node *np,
				  const char *bus_id,
				  struct device *parent)
{
	struct platform_device *dev;
	int rc, i, num_reg = 0, num_irq = 0;
	struct resource *res, temp_res;

	/* First count how many resources are needed */
	while (of_address_to_resource(np, num_reg, &temp_res) == 0)
		num_reg++;
	while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ)
		num_irq++;

	/* Allocate memory for both the struct device and the resource table */
	dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)),
		      GFP_KERNEL);
	if (!dev)
		return NULL;
	res = (struct resource *) &dev[1];

	/* Populate the resource table */
	if (num_irq || num_reg) {
		dev->num_resources = num_reg + num_irq;
		dev->resource = res;
		for (i = 0; i < num_reg; i++, res++) {
			rc = of_address_to_resource(np, i, res);
			WARN_ON(rc);
		}
		for (i = 0; i < num_irq; i++, res++) {
			rc = of_irq_to_resource(np, i, res);
			WARN_ON(rc == NO_IRQ);
		}
	}

	dev->dev.of_node = of_node_get(np);
#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
	dev->dev.dma_mask = &dev->archdata.dma_mask;
#endif
	dev->dev.parent = parent;
	dev->dev.release = of_release_dev;

	if (bus_id)
		dev_set_name(&dev->dev, "%s", bus_id);
	else
		of_device_make_bus_id(&dev->dev);

	return dev;
}
EXPORT_SYMBOL(of_device_alloc);

/**
 * of_platform_device_create - Alloc, initialize and register an of_device
 * @np: pointer to node to create device for
 * @bus_id: name to assign device
 * @parent: Linux device model parent device.
 */
struct platform_device *of_platform_device_create(struct device_node *np,
					    const char *bus_id,
					    struct device *parent)
{
	struct platform_device *dev;

	dev = of_device_alloc(np, bus_id, parent);
	if (!dev)
		return NULL;

#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
	dev->archdata.dma_mask = 0xffffffffUL;
#endif
	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	dev->dev.bus = &platform_bus_type;

	/* We do not fill the DMA ops for platform devices by default.
	 * This is currently the responsibility of the platform code
	 * to do such, possibly using a device notifier
	 */

	if (of_device_register(dev) != 0) {
		of_device_free(dev);
		return NULL;
	}

	return dev;
}
EXPORT_SYMBOL(of_platform_device_create);

/**
 * of_platform_bus_create - Create an OF device for a bus node and all its
 * children. Optionally recursively instantiate matching busses.
 * @bus: device node of the bus to instantiate
 * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
 * disallow recursive creation of child busses
 */
static int of_platform_bus_create(const struct device_node *bus,
				  const struct of_device_id *matches,
				  struct device *parent)
{
	struct device_node *child;
	struct platform_device *dev;
	int rc = 0;

	for_each_child_of_node(bus, child) {
		pr_debug("   create child: %s\n", child->full_name);
		dev = of_platform_device_create(child, NULL, parent);
		if (dev == NULL)
			rc = -ENOMEM;
		else if (!of_match_node(matches, child))
			continue;
		if (rc == 0) {
			pr_debug("   and sub busses\n");
			rc = of_platform_bus_create(child, matches, &dev->dev);
		}
		if (rc) {
			of_node_put(child);
			break;
		}
	}
	return rc;
}

/**
 * of_platform_bus_probe - Probe the device-tree for platform busses
 * @root: parent of the first level to probe or NULL for the root of the tree
 * @matches: match table, NULL to use the default
 * @parent: parent to hook devices from, NULL for toplevel
 *
 * Note that children of the provided root are not instantiated as devices
 * unless the specified root itself matches the bus list and is not NULL.
 */
int of_platform_bus_probe(struct device_node *root,
			  const struct of_device_id *matches,
			  struct device *parent)
{
	struct device_node *child;
	struct platform_device *dev;
	int rc = 0;

	if (WARN_ON(!matches || matches == OF_NO_DEEP_PROBE))
		return -EINVAL;
	if (root == NULL)
		root = of_find_node_by_path("/");
	else
		of_node_get(root);
	if (root == NULL)
		return -EINVAL;

	pr_debug("of_platform_bus_probe()\n");
	pr_debug(" starting at: %s\n", root->full_name);

	/* Do a self check of bus type, if there's a match, create
	 * children
	 */
	if (of_match_node(matches, root)) {
		pr_debug(" root match, create all sub devices\n");
		dev = of_platform_device_create(root, NULL, parent);
		if (dev == NULL) {
			rc = -ENOMEM;
			goto bail;
		}
		pr_debug(" create all sub busses\n");
		rc = of_platform_bus_create(root, matches, &dev->dev);
		goto bail;
	}
	for_each_child_of_node(root, child) {
		if (!of_match_node(matches, child))
			continue;

		pr_debug("  match: %s\n", child->full_name);
		dev = of_platform_device_create(child, NULL, parent);
		if (dev == NULL)
			rc = -ENOMEM;
		else
			rc = of_platform_bus_create(child, matches, &dev->dev);
		if (rc) {
			of_node_put(child);
			break;
		}
	}
 bail:
	of_node_put(root);
	return rc;
}
EXPORT_SYMBOL(of_platform_bus_probe);
#endif /* !CONFIG_SPARC */
Commit	Line	Data
3f23de10 SR	1	/*
	2	* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
	3	* <benh@kernel.crashing.org>
	4	* and Arnd Bergmann, IBM Corp.
	5	* Merged from powerpc/kernel/of_platform.c and
	6	* sparc{,64}/kernel/of_device.c by Stephen Rothwell
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version
	11	* 2 of the License, or (at your option) any later version.
	12	*
	13	*/
	14	#include <linux/errno.h>
5c457083	15	#include <linux/module.h>
3f23de10	16	#include <linux/device.h>
5fd200f3	17	#include <linux/dma-mapping.h>
50ef5284	18	#include <linux/slab.h>
9e3288dc	19	#include <linux/of_address.h>
3f23de10	20	#include <linux/of_device.h>
9e3288dc	21	#include <linux/of_irq.h>
3f23de10	22	#include <linux/of_platform.h>
eca39301 GL	23	#include <linux/platform_device.h>
eca39301 GL	24
c6085584 JB	25	static int of_dev_node_match(struct device dev, void data)
	26	{
	27	return dev->of_node == data;
	28	}
	29
	30	/**
	31	* of_find_device_by_node - Find the platform_device associated with a node
	32	* @np: Pointer to device tree node
	33	*
	34	* Returns platform_device pointer, or NULL if not found
	35	*/
	36	struct platform_device of_find_device_by_node(struct device_node np)
	37	{
	38	struct device *dev;
	39
	40	dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
	41	return dev ? to_platform_device(dev) : NULL;
	42	}
	43	EXPORT_SYMBOL(of_find_device_by_node);
	44
eca39301 GL	45	static int platform_driver_probe_shim(struct platform_device *pdev)
	46	{
	47	struct platform_driver *pdrv;
	48	struct of_platform_driver *ofpdrv;
	49	const struct of_device_id *match;
	50
	51	pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
	52	ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);
c1b6d380 GL	53
	54	/* There is an unlikely chance that an of_platform driver might match
	55	* on a non-OF platform device. If so, then of_match_device() will
	56	* come up empty. Return -EINVAL in this case so other drivers get
	57	* the chance to bind. */
eca39301	58	match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
c1b6d380	59	return match ? ofpdrv->probe(pdev, match) : -EINVAL;
eca39301 GL	60	}
	61
	62	static void platform_driver_shutdown_shim(struct platform_device *pdev)
	63	{
	64	struct platform_driver *pdrv;
	65	struct of_platform_driver *ofpdrv;
	66
	67	pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
	68	ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);
	69	ofpdrv->shutdown(pdev);
	70	}
	71
	72	/**
	73	* of_register_platform_driver
	74	*/
	75	int of_register_platform_driver(struct of_platform_driver *drv)
	76	{
	77	/* setup of_platform_driver to platform_driver adaptors */
	78	drv->platform_driver.driver = drv->driver;
	79	if (drv->probe)
	80	drv->platform_driver.probe = platform_driver_probe_shim;
	81	drv->platform_driver.remove = drv->remove;
	82	if (drv->shutdown)
	83	drv->platform_driver.shutdown = platform_driver_shutdown_shim;
	84	drv->platform_driver.suspend = drv->suspend;
	85	drv->platform_driver.resume = drv->resume;
	86
	87	return platform_driver_register(&drv->platform_driver);
	88	}
	89	EXPORT_SYMBOL(of_register_platform_driver);
	90
	91	void of_unregister_platform_driver(struct of_platform_driver *drv)
	92	{
	93	platform_driver_unregister(&drv->platform_driver);
	94	}
	95	EXPORT_SYMBOL(of_unregister_platform_driver);
3f23de10	96
596c955c GL	97	#if defined(CONFIG_PPC_DCR)
	98	#include <asm/dcr.h>
	99	#endif
	100
140b932f OH	101	extern struct device_attribute of_platform_device_attrs[];
140b932f OH	102
3f23de10 SR	103	static int of_platform_bus_match(struct device dev, struct device_driver drv)
3f23de10 SR	104	{
597b9d1e	105	const struct of_device_id *matches = drv->of_match_table;
3f23de10 SR	106
	107	if (!matches)
	108	return 0;
	109
44504b2b	110	return of_match_device(matches, dev) != NULL;
3f23de10 SR	111	}
	112
	113	static int of_platform_device_probe(struct device *dev)
	114	{
	115	int error = -ENODEV;
	116	struct of_platform_driver *drv;
94a0cb1f	117	struct platform_device *of_dev;
3f23de10 SR	118	const struct of_device_id *match;
	119
	120	drv = to_of_platform_driver(dev->driver);
94a0cb1f	121	of_dev = to_platform_device(dev);
3f23de10 SR	122
	123	if (!drv->probe)
	124	return error;
	125
	126	of_dev_get(of_dev);
	127
44504b2b	128	match = of_match_device(drv->driver.of_match_table, dev);
3f23de10 SR	129	if (match)
	130	error = drv->probe(of_dev, match);
	131	if (error)
	132	of_dev_put(of_dev);
	133
	134	return error;
	135	}
	136
	137	static int of_platform_device_remove(struct device *dev)
	138	{
94a0cb1f	139	struct platform_device *of_dev = to_platform_device(dev);
3f23de10 SR	140	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
	141
	142	if (dev->driver && drv->remove)
	143	drv->remove(of_dev);
	144	return 0;
	145	}
	146
d35ef90b	147	static void of_platform_device_shutdown(struct device *dev)
3f23de10	148	{
94a0cb1f	149	struct platform_device *of_dev = to_platform_device(dev);
3f23de10	150	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
3f23de10	151
d35ef90b AV	152	if (dev->driver && drv->shutdown)
d35ef90b AV	153	drv->shutdown(of_dev);
3f23de10 SR	154	}
3f23de10 SR	155
d35ef90b AV	156	#ifdef CONFIG_PM_SLEEP
	157
	158	static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg)
3f23de10	159	{
94a0cb1f	160	struct platform_device *of_dev = to_platform_device(dev);
3f23de10	161	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
d35ef90b	162	int ret = 0;
3f23de10	163
d35ef90b AV	164	if (dev->driver && drv->suspend)
	165	ret = drv->suspend(of_dev, mesg);
	166	return ret;
3f23de10 SR	167	}
3f23de10 SR	168
d35ef90b	169	static int of_platform_legacy_resume(struct device *dev)
a09ad3c4	170	{
94a0cb1f	171	struct platform_device *of_dev = to_platform_device(dev);
a09ad3c4	172	struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
d35ef90b	173	int ret = 0;
a09ad3c4	174
d35ef90b AV	175	if (dev->driver && drv->resume)
	176	ret = drv->resume(of_dev);
	177	return ret;
	178	}
	179
	180	static int of_platform_pm_prepare(struct device *dev)
	181	{
	182	struct device_driver *drv = dev->driver;
	183	int ret = 0;
	184
	185	if (drv && drv->pm && drv->pm->prepare)
	186	ret = drv->pm->prepare(dev);
	187
	188	return ret;
	189	}
	190
	191	static void of_platform_pm_complete(struct device *dev)
	192	{
	193	struct device_driver *drv = dev->driver;
	194
	195	if (drv && drv->pm && drv->pm->complete)
	196	drv->pm->complete(dev);
	197	}
	198
	199	#ifdef CONFIG_SUSPEND
	200
	201	static int of_platform_pm_suspend(struct device *dev)
	202	{
	203	struct device_driver *drv = dev->driver;
	204	int ret = 0;
	205
	206	if (!drv)
	207	return 0;
	208
	209	if (drv->pm) {
	210	if (drv->pm->suspend)
	211	ret = drv->pm->suspend(dev);
	212	} else {
	213	ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND);
	214	}
	215
	216	return ret;
a09ad3c4 ME	217	}
a09ad3c4 ME	218
d35ef90b AV	219	static int of_platform_pm_suspend_noirq(struct device *dev)
	220	{
	221	struct device_driver *drv = dev->driver;
	222	int ret = 0;
	223
	224	if (!drv)
	225	return 0;
	226
	227	if (drv->pm) {
	228	if (drv->pm->suspend_noirq)
	229	ret = drv->pm->suspend_noirq(dev);
	230	}
	231
	232	return ret;
	233	}
	234
	235	static int of_platform_pm_resume(struct device *dev)
	236	{
	237	struct device_driver *drv = dev->driver;
	238	int ret = 0;
	239
	240	if (!drv)
	241	return 0;
	242
	243	if (drv->pm) {
	244	if (drv->pm->resume)
	245	ret = drv->pm->resume(dev);
	246	} else {
	247	ret = of_platform_legacy_resume(dev);
	248	}
	249
	250	return ret;
	251	}
	252
	253	static int of_platform_pm_resume_noirq(struct device *dev)
	254	{
	255	struct device_driver *drv = dev->driver;
	256	int ret = 0;
	257
	258	if (!drv)
	259	return 0;
	260
	261	if (drv->pm) {
	262	if (drv->pm->resume_noirq)
	263	ret = drv->pm->resume_noirq(dev);
	264	}
	265
	266	return ret;
	267	}
	268
	269	#else /* !CONFIG_SUSPEND */
	270
	271	#define of_platform_pm_suspend NULL
	272	#define of_platform_pm_resume NULL
	273	#define of_platform_pm_suspend_noirq NULL
	274	#define of_platform_pm_resume_noirq NULL
	275
	276	#endif /* !CONFIG_SUSPEND */
	277
	278	#ifdef CONFIG_HIBERNATION
	279
	280	static int of_platform_pm_freeze(struct device *dev)
	281	{
	282	struct device_driver *drv = dev->driver;
283	int ret = 0;
284
285	if (!drv)
286	return 0;
287
288	if (drv->pm) {
289	if (drv->pm->freeze)
290	ret = drv->pm->freeze(dev);
291	} else {
292	ret = of_platform_legacy_suspend(dev, PMSG_FREEZE);
293	}
294
295	return ret;
296	}
297
298	static int of_platform_pm_freeze_noirq(struct device *dev)
299	{
300	struct device_driver *drv = dev->driver;
301	int ret = 0;
302
303	if (!drv)
304	return 0;
305
306	if (drv->pm) {
307	if (drv->pm->freeze_noirq)
308	ret = drv->pm->freeze_noirq(dev);
309	}
310
311	return ret;
312	}
313
314	static int of_platform_pm_thaw(struct device *dev)
315	{
316	struct device_driver *drv = dev->driver;
317	int ret = 0;
318
319	if (!drv)
320	return 0;
321
322	if (drv->pm) {
323	if (drv->pm->thaw)
324	ret = drv->pm->thaw(dev);
325	} else {
326	ret = of_platform_legacy_resume(dev);
327	}
328
329	return ret;
330	}
331
332	static int of_platform_pm_thaw_noirq(struct device *dev)
333	{
334	struct device_driver *drv = dev->driver;
335	int ret = 0;
336
337	if (!drv)
338	return 0;
339
340	if (drv->pm) {
341	if (drv->pm->thaw_noirq)
342	ret = drv->pm->thaw_noirq(dev);
343	}
344
345	return ret;
346	}
347
348	static int of_platform_pm_poweroff(struct device *dev)
349	{
350	struct device_driver *drv = dev->driver;
351	int ret = 0;
352
353	if (!drv)
354	return 0;
355
356	if (drv->pm) {
357	if (drv->pm->poweroff)
358	ret = drv->pm->poweroff(dev);
359	} else {
360	ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE);
361	}
362
363	return ret;
364	}
365
366	static int of_platform_pm_poweroff_noirq(struct device *dev)
367	{
368	struct device_driver *drv = dev->driver;
369	int ret = 0;
370
371	if (!drv)
372	return 0;
373
374	if (drv->pm) {
375	if (drv->pm->poweroff_noirq)
376	ret = drv->pm->poweroff_noirq(dev);
377	}
378
379	return ret;
380	}
381
382	static int of_platform_pm_restore(struct device *dev)
383	{
384	struct device_driver *drv = dev->driver;
385	int ret = 0;
386
387	if (!drv)
388	return 0;
389
390	if (drv->pm) {
391	if (drv->pm->restore)
392	ret = drv->pm->restore(dev);
393	} else {
394	ret = of_platform_legacy_resume(dev);
395	}
396
397	return ret;
398	}
399
400	static int of_platform_pm_restore_noirq(struct device *dev)
401	{
402	struct device_driver *drv = dev->driver;
403	int ret = 0;
404
405	if (!drv)
406	return 0;
407
408	if (drv->pm) {
409	if (drv->pm->restore_noirq)
410	ret = drv->pm->restore_noirq(dev);
411	}
412
413	return ret;
414	}
415
416	#else /* !CONFIG_HIBERNATION */
417
418	#define of_platform_pm_freeze NULL
419	#define of_platform_pm_thaw NULL
420	#define of_platform_pm_poweroff NULL
421	#define of_platform_pm_restore NULL
422	#define of_platform_pm_freeze_noirq NULL
423	#define of_platform_pm_thaw_noirq NULL
424	#define of_platform_pm_poweroff_noirq NULL
425	#define of_platform_pm_restore_noirq NULL
426
427	#endif /* !CONFIG_HIBERNATION */
428
429	static struct dev_pm_ops of_platform_dev_pm_ops = {
430	.prepare = of_platform_pm_prepare,
431	.complete = of_platform_pm_complete,
432	.suspend = of_platform_pm_suspend,
433	.resume = of_platform_pm_resume,
434	.freeze = of_platform_pm_freeze,
435	.thaw = of_platform_pm_thaw,
436	.poweroff = of_platform_pm_poweroff,
437	.restore = of_platform_pm_restore,
438	.suspend_noirq = of_platform_pm_suspend_noirq,
439	.resume_noirq = of_platform_pm_resume_noirq,
440	.freeze_noirq = of_platform_pm_freeze_noirq,
441	.thaw_noirq = of_platform_pm_thaw_noirq,
442	.poweroff_noirq = of_platform_pm_poweroff_noirq,
443	.restore_noirq = of_platform_pm_restore_noirq,
444	};
445
446	#define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops)
447
448	#else /* !CONFIG_PM_SLEEP */
449
450	#define OF_PLATFORM_PM_OPS_PTR NULL
451
452	#endif /* !CONFIG_PM_SLEEP */
453
3f23de10 SR	454	int of_bus_type_init(struct bus_type bus, const char name)
	455	{
	456	bus->name = name;
	457	bus->match = of_platform_bus_match;
	458	bus->probe = of_platform_device_probe;
	459	bus->remove = of_platform_device_remove;
a09ad3c4	460	bus->shutdown = of_platform_device_shutdown;
140b932f	461	bus->dev_attrs = of_platform_device_attrs;
d35ef90b	462	bus->pm = OF_PLATFORM_PM_OPS_PTR;
3f23de10 SR	463	return bus_register(bus);
3f23de10 SR	464	}
5c457083 SR	465
	466	int of_register_driver(struct of_platform_driver drv, struct bus_type bus)
	467	{
eca39301 GL	468	/*
	469	* Temporary: of_platform_bus used to be distinct from the platform
	470	* bus. It isn't anymore, and so drivers on the platform bus need
	471	* to be registered in a special way.
	472	*
	473	* After all of_platform_bus_type drivers are converted to
	474	* platform_drivers, this exception can be removed.
	475	*/
	476	if (bus == &platform_bus_type)
	477	return of_register_platform_driver(drv);
5c457083 SR	478
5c457083 SR	479	/* register with core */
eca39301	480	drv->driver.bus = bus;
5c457083 SR	481	return driver_register(&drv->driver);
	482	}
	483	EXPORT_SYMBOL(of_register_driver);
	484
	485	void of_unregister_driver(struct of_platform_driver *drv)
	486	{
eca39301 GL	487	if (drv->driver.bus == &platform_bus_type)
	488	of_unregister_platform_driver(drv);
	489	else
	490	driver_unregister(&drv->driver);
5c457083 SR	491	}
5c457083 SR	492	EXPORT_SYMBOL(of_unregister_driver);
5fd200f3 GL	493
	494	#if !defined(CONFIG_SPARC)
	495	/*
	496	* The following routines scan a subtree and registers a device for
	497	* each applicable node.
	498	*
	499	* Note: sparc doesn't use these routines because it has a different
	500	* mechanism for creating devices from device tree nodes.
	501	*/
	502
94c09319 GL	503	/**
	504	* of_device_make_bus_id - Use the device node data to assign a unique name
	505	* @dev: pointer to device structure that is linked to a device tree node
	506	*
	507	* This routine will first try using either the dcr-reg or the reg property
	508	* value to derive a unique name. As a last resort it will use the node
	509	* name followed by a unique number.
	510	*/
	511	static void of_device_make_bus_id(struct device *dev)
	512	{
	513	static atomic_t bus_no_reg_magic;
	514	struct device_node *node = dev->of_node;
	515	const u32 *reg;
	516	u64 addr;
	517	int magic;
	518
	519	#ifdef CONFIG_PPC_DCR
	520	/*
	521	* If it's a DCR based device, use 'd' for native DCRs
	522	* and 'D' for MMIO DCRs.
	523	*/
	524	reg = of_get_property(node, "dcr-reg", NULL);
	525	if (reg) {
	526	#ifdef CONFIG_PPC_DCR_NATIVE
	527	dev_set_name(dev, "d%x.%s", *reg, node->name);
	528	#else /* CONFIG_PPC_DCR_NATIVE */
	529	u64 addr = of_translate_dcr_address(node, *reg, NULL);
	530	if (addr != OF_BAD_ADDR) {
	531	dev_set_name(dev, "D%llx.%s",
	532	(unsigned long long)addr, node->name);
	533	return;
	534	}
	535	#endif /* !CONFIG_PPC_DCR_NATIVE */
	536	}
	537	#endif /* CONFIG_PPC_DCR */
	538
	539	/*
	540	* For MMIO, get the physical address
	541	*/
	542	reg = of_get_property(node, "reg", NULL);
	543	if (reg) {
	544	addr = of_translate_address(node, reg);
	545	if (addr != OF_BAD_ADDR) {
	546	dev_set_name(dev, "%llx.%s",
	547	(unsigned long long)addr, node->name);
	548	return;
	549	}
	550	}
	551
	552	/*
	553	* No BusID, use the node name and add a globally incremented
	554	* counter (and pray...)
	555	*/
	556	magic = atomic_add_return(1, &bus_no_reg_magic);
	557	dev_set_name(dev, "%s.%d", node->name, magic - 1);
	558	}
	559
	560	/**
	561	* of_device_alloc - Allocate and initialize an of_device
	562	* @np: device node to assign to device
	563	* @bus_id: Name to assign to the device. May be null to use default name.
	564	* @parent: Parent device.
	565	*/
94a0cb1f	566	struct platform_device of_device_alloc(struct device_node np,
94c09319 GL	567	const char *bus_id,
	568	struct device *parent)
	569	{
94a0cb1f	570	struct platform_device *dev;
ac80a51e GL	571	int rc, i, num_reg = 0, num_irq = 0;
	572	struct resource *res, temp_res;
	573
	574	/* First count how many resources are needed */
	575	while (of_address_to_resource(np, num_reg, &temp_res) == 0)
	576	num_reg++;
	577	while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ)
	578	num_irq++;
	579
	580	/* Allocate memory for both the struct device and the resource table */
	581	dev = kzalloc(sizeof(dev) + (sizeof(res) * (num_reg + num_irq)),
	582	GFP_KERNEL);
94c09319 GL	583	if (!dev)
94c09319 GL	584	return NULL;
ac80a51e GL	585	res = (struct resource *) &dev[1];
	586
	587	/* Populate the resource table */
	588	if (num_irq \|\| num_reg) {
	589	dev->num_resources = num_reg + num_irq;
	590	dev->resource = res;
	591	for (i = 0; i < num_reg; i++, res++) {
	592	rc = of_address_to_resource(np, i, res);
	593	WARN_ON(rc);
	594	}
	595	for (i = 0; i < num_irq; i++, res++) {
	596	rc = of_irq_to_resource(np, i, res);
	597	WARN_ON(rc == NO_IRQ);
	598	}
	599	}
94c09319 GL	600
94c09319 GL	601	dev->dev.of_node = of_node_get(np);
9e3288dc	602	#if defined(CONFIG_PPC) \|\| defined(CONFIG_MICROBLAZE)
94c09319	603	dev->dev.dma_mask = &dev->archdata.dma_mask;
9e3288dc	604	#endif
94c09319 GL	605	dev->dev.parent = parent;
	606	dev->dev.release = of_release_dev;
	607
	608	if (bus_id)
	609	dev_set_name(&dev->dev, "%s", bus_id);
	610	else
	611	of_device_make_bus_id(&dev->dev);
	612
	613	return dev;
	614	}
	615	EXPORT_SYMBOL(of_device_alloc);
	616
5fd200f3 GL	617	/**
	618	* of_platform_device_create - Alloc, initialize and register an of_device
	619	* @np: pointer to node to create device for
	620	* @bus_id: name to assign device
	621	* @parent: Linux device model parent device.
	622	*/
94a0cb1f	623	struct platform_device of_platform_device_create(struct device_node np,
5fd200f3 GL	624	const char *bus_id,
	625	struct device *parent)
	626	{
94a0cb1f	627	struct platform_device *dev;
5fd200f3 GL	628
	629	dev = of_device_alloc(np, bus_id, parent);
	630	if (!dev)
	631	return NULL;
	632
9e3288dc	633	#if defined(CONFIG_PPC) \|\| defined(CONFIG_MICROBLAZE)
5fd200f3	634	dev->archdata.dma_mask = 0xffffffffUL;
9e3288dc	635	#endif
5fd200f3	636	dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
eca39301	637	dev->dev.bus = &platform_bus_type;
5fd200f3 GL	638
	639	/* We do not fill the DMA ops for platform devices by default.
	640	* This is currently the responsibility of the platform code
	641	* to do such, possibly using a device notifier
	642	*/
	643
	644	if (of_device_register(dev) != 0) {
	645	of_device_free(dev);
	646	return NULL;
	647	}
	648
	649	return dev;
	650	}
	651	EXPORT_SYMBOL(of_platform_device_create);
	652
	653	/**
	654	* of_platform_bus_create - Create an OF device for a bus node and all its
	655	* children. Optionally recursively instantiate matching busses.
	656	* @bus: device node of the bus to instantiate
	657	* @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
	658	* disallow recursive creation of child busses
	659	*/
	660	static int of_platform_bus_create(const struct device_node *bus,
	661	const struct of_device_id *matches,
	662	struct device *parent)
	663	{
	664	struct device_node *child;
94a0cb1f	665	struct platform_device *dev;
5fd200f3 GL	666	int rc = 0;
	667
	668	for_each_child_of_node(bus, child) {
	669	pr_debug(" create child: %s\n", child->full_name);
	670	dev = of_platform_device_create(child, NULL, parent);
	671	if (dev == NULL)
	672	rc = -ENOMEM;
	673	else if (!of_match_node(matches, child))
	674	continue;
	675	if (rc == 0) {
	676	pr_debug(" and sub busses\n");
	677	rc = of_platform_bus_create(child, matches, &dev->dev);
	678	}
	679	if (rc) {
	680	of_node_put(child);
	681	break;
	682	}
	683	}
	684	return rc;
	685	}
	686
	687	/**
	688	* of_platform_bus_probe - Probe the device-tree for platform busses
	689	* @root: parent of the first level to probe or NULL for the root of the tree
	690	* @matches: match table, NULL to use the default
	691	* @parent: parent to hook devices from, NULL for toplevel
	692	*
	693	* Note that children of the provided root are not instantiated as devices
	694	* unless the specified root itself matches the bus list and is not NULL.
	695	*/
	696	int of_platform_bus_probe(struct device_node *root,
	697	const struct of_device_id *matches,
	698	struct device *parent)
	699	{
	700	struct device_node *child;
94a0cb1f	701	struct platform_device *dev;
5fd200f3 GL	702	int rc = 0;
5fd200f3 GL	703
c0dd394c	704	if (WARN_ON(!matches \|\| matches == OF_NO_DEEP_PROBE))
5fd200f3 GL	705	return -EINVAL;
	706	if (root == NULL)
	707	root = of_find_node_by_path("/");
	708	else
	709	of_node_get(root);
60d59913 GL	710	if (root == NULL)
60d59913 GL	711	return -EINVAL;
5fd200f3 GL	712
	713	pr_debug("of_platform_bus_probe()\n");
	714	pr_debug(" starting at: %s\n", root->full_name);
	715
	716	/* Do a self check of bus type, if there's a match, create
	717	* children
	718	*/
	719	if (of_match_node(matches, root)) {
	720	pr_debug(" root match, create all sub devices\n");
	721	dev = of_platform_device_create(root, NULL, parent);
	722	if (dev == NULL) {
	723	rc = -ENOMEM;
	724	goto bail;
	725	}
	726	pr_debug(" create all sub busses\n");
	727	rc = of_platform_bus_create(root, matches, &dev->dev);
	728	goto bail;
	729	}
	730	for_each_child_of_node(root, child) {
	731	if (!of_match_node(matches, child))
	732	continue;
	733
	734	pr_debug(" match: %s\n", child->full_name);
	735	dev = of_platform_device_create(child, NULL, parent);
	736	if (dev == NULL)
	737	rc = -ENOMEM;
	738	else
	739	rc = of_platform_bus_create(child, matches, &dev->dev);
	740	if (rc) {
	741	of_node_put(child);
	742	break;
	743	}
	744	}
	745	bail:
	746	of_node_put(root);
	747	return rc;
	748	}
	749	EXPORT_SYMBOL(of_platform_bus_probe);
	750	#endif /* !CONFIG_SPARC */