1 files changed, 45 insertions, 528 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index bb72223c22ae..63d3cb73bdb9 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -42,471 +42,10 @@ struct platform_device *of_find_device_by_node(struct device_node *np)
 }
 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)
-{
-        char *of_name;
-
-        /* setup of_platform_driver to platform_driver adaptors */
-        drv->platform_driver.driver = drv->driver;
-
-        /* Prefix the driver name with 'of:' to avoid namespace collisions
-         * and bogus matches.  There are some drivers in the tree that
-         * register both an of_platform_driver and a platform_driver with
-         * the same name.  This is a temporary measure until they are all
-         * cleaned up --gcl July 29, 2010 */
-        of_name = kmalloc(strlen(drv->driver.name) + 5, GFP_KERNEL);
-        if (!of_name)
-                return -ENOMEM;
-        sprintf(of_name, "of:%s", drv->driver.name);
-        drv->platform_driver.driver.name = of_name;
-
-        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);
-        kfree(drv->platform_driver.driver.name);
-        drv->platform_driver.driver.name = NULL;
-}
-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
@@ -584,34 +123,33 @@ struct platform_device *of_device_alloc(struct device_node *np,
                                   struct device *parent)
 {
         struct platform_device *dev;
-        int rc, i, num_reg = 0, num_irq = 0;
+        int rc, i, num_reg = 0, num_irq;
         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);
+        dev = platform_device_alloc("", -1);
         if (!dev)
                 return NULL;
-        res = (struct resource *) &dev[1];
+
+        /* count the io and irq resources */
+        while (of_address_to_resource(np, num_reg, &temp_res) == 0)
+                num_reg++;
+        num_irq = of_irq_count(np);
 
         /* Populate the resource table */
         if (num_irq || num_reg) {
+                res = kzalloc(sizeof(*res) * (num_irq + num_reg), GFP_KERNEL);
+                if (!res) {
+                        platform_device_put(dev);
+                        return NULL;
+                }
+
                 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);
-                }
+                WARN_ON(of_irq_to_resource_table(np, res, num_irq) != num_irq);
         }
 
         dev->dev.of_node = of_node_get(np);
@@ -619,7 +157,6 @@ struct platform_device *of_device_alloc(struct device_node *np,
         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);
@@ -635,6 +172,9 @@ EXPORT_SYMBOL(of_device_alloc);
  * @np: pointer to node to create device for
  * @bus_id: name to assign device
  * @parent: Linux device model parent device.
+ *
+ * Returns pointer to created platform device, or NULL if a device was not
+ * registered.  Unavailable devices will not get registered.
  */
 struct platform_device *of_platform_device_create(struct device_node *np,
                                             const char *bus_id,
@@ -642,6 +182,9 @@ struct platform_device *of_platform_device_create(struct device_node *np,
 {
         struct platform_device *dev;
 
+        if (!of_device_is_available(np))
+                return NULL;
+
         dev = of_device_alloc(np, bus_id, parent);
         if (!dev)
                 return NULL;
@@ -657,8 +200,8 @@ struct platform_device *of_platform_device_create(struct device_node *np,
          * to do such, possibly using a device notifier
          */
 
-        if (of_device_register(dev) != 0) {
-                of_device_free(dev);
+        if (of_device_add(dev) != 0) {
+                platform_device_put(dev);
                 return NULL;
         }
 
@@ -667,13 +210,16 @@ struct platform_device *of_platform_device_create(struct device_node *np,
 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.
+ * of_platform_bus_create() - Create a device for a node and its children.
  * @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
+ * @matches: match table for bus nodes
+ * disallow recursive creation of child buses
+ * @parent: parent for new device, or NULL for top level.
+ *
+ * Creates a platform_device for the provided device_node, and optionally
+ * recursively create devices for all the child nodes.
  */
-static int of_platform_bus_create(const struct device_node *bus,
+static int of_platform_bus_create(struct device_node *bus,
                                   const struct of_device_id *matches,
                                   struct device *parent)
 {
@@ -681,17 +227,13 @@ static int of_platform_bus_create(const struct device_node *bus,
         struct platform_device *dev;
         int rc = 0;
 
+        dev = of_platform_device_create(bus, NULL, parent);
+        if (!dev || !of_match_node(matches, bus))
+                return 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);
-                }
+                rc = of_platform_bus_create(child, matches, &dev->dev);
                 if (rc) {
                         of_node_put(child);
                         break;
@@ -701,9 +243,9 @@ static int of_platform_bus_create(const struct device_node *bus,
 }
 
 /**
- * of_platform_bus_probe - Probe the device-tree for platform busses
+ * of_platform_bus_probe() - Probe the device-tree for platform buses
  * @root: parent of the first level to probe or NULL for the root of the tree
- * @matches: match table, NULL to use the default
+ * @matches: match table for bus nodes
  * @parent: parent to hook devices from, NULL for toplevel
  *
  * Note that children of the provided root are not instantiated as devices
@@ -714,51 +256,26 @@ int of_platform_bus_probe(struct device_node *root,
                           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)
+        root = root ? of_node_get(root) : of_find_node_by_path("/");
+        if (!root)
                 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
-         */
+        /* 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) {
+                rc = of_platform_bus_create(root, matches, parent);
+        } else 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);
+                rc = of_platform_bus_create(child, matches, parent);
+                if (rc)
                         break;
-                }
         }
- bail:
+
         of_node_put(root);
         return rc;
 }