Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

[pandora-kernel.git] / drivers / base / platform.c

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1091af1..2b8755d 100644 (file)
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -25,6 +25,7 @@
 struct device platform_bus = {
        .bus_id         = "platform",
 };
+EXPORT_SYMBOL_GPL(platform_bus);
 
 /**
  *     platform_get_resource - get a resource for a device
@@ -49,6 +50,7 @@ platform_get_resource(struct platform_device *dev, unsigned int type,
        }
        return NULL;
 }
+EXPORT_SYMBOL_GPL(platform_get_resource);
 
 /**
  *     platform_get_irq - get an IRQ for a device
@@ -59,8 +61,9 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
 {
        struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num);
 
-       return r ? r->start : 0;
+       return r ? r->start : -ENXIO;
 }
+EXPORT_SYMBOL_GPL(platform_get_irq);
 
 /**
  *     platform_get_resource_byname - get a resource for a device by name
@@ -84,6 +87,7 @@ platform_get_resource_byname(struct platform_device *dev, unsigned int type,
        }
        return NULL;
 }
+EXPORT_SYMBOL_GPL(platform_get_resource_byname);
 
 /**
  *     platform_get_irq - get an IRQ for a device
@@ -94,8 +98,9 @@ int platform_get_irq_byname(struct platform_device *dev, char *name)
 {
        struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
 
-       return r ? r->start : 0;
+       return r ? r->start : -ENXIO;
 }
+EXPORT_SYMBOL_GPL(platform_get_irq_byname);
 
 /**
  *     platform_add_devices - add a numbers of platform devices
@@ -117,6 +122,7 @@ int platform_add_devices(struct platform_device **devs, int num)
 
        return ret;
 }
+EXPORT_SYMBOL_GPL(platform_add_devices);
 
 struct platform_object {
        struct platform_device pdev;
@@ -168,7 +174,7 @@ struct platform_device *platform_device_alloc(const char *name, unsigned int id)
                pa->pdev.dev.release = platform_device_release;
        }
 
-       return pa ? &pa->pdev : NULL;   
+       return pa ? &pa->pdev : NULL;
 }
 EXPORT_SYMBOL_GPL(platform_device_alloc);
 
@@ -269,7 +275,7 @@ int platform_device_add(struct platform_device *pdev)
        pr_debug("Registering platform device '%s'. Parent at %s\n",
                 pdev->dev.bus_id, pdev->dev.parent->bus_id);
 
-       ret = device_register(&pdev->dev);
+       ret = device_add(&pdev->dev);
        if (ret == 0)
                return ret;
 
@@ -282,24 +288,13 @@ int platform_device_add(struct platform_device *pdev)
 EXPORT_SYMBOL_GPL(platform_device_add);
 
 /**
- *     platform_device_register - add a platform-level device
- *     @pdev:  platform device we're adding
- *
- */
-int platform_device_register(struct platform_device * pdev)
-{
-       device_initialize(&pdev->dev);
-       return platform_device_add(pdev);
-}
-
-/**
- *     platform_device_unregister - remove a platform-level device
+ *     platform_device_del - remove a platform-level device
  *     @pdev:  platform device we're removing
  *
  *     Note that this function will also release all memory- and port-based
  *     resources owned by the device (@dev->resource).
  */
-void platform_device_unregister(struct platform_device * pdev)
+void platform_device_del(struct platform_device *pdev)
 {
        int i;
 
@@ -310,9 +305,37 @@ void platform_device_unregister(struct platform_device * pdev)
                                release_resource(r);
                }
 
-               device_unregister(&pdev->dev);
+               device_del(&pdev->dev);
        }
 }
+EXPORT_SYMBOL_GPL(platform_device_del);
+
+/**
+ *     platform_device_register - add a platform-level device
+ *     @pdev:  platform device we're adding
+ *
+ */
+int platform_device_register(struct platform_device * pdev)
+{
+       device_initialize(&pdev->dev);
+       return platform_device_add(pdev);
+}
+EXPORT_SYMBOL_GPL(platform_device_register);
+
+/**
+ *     platform_device_unregister - unregister a platform-level device
+ *     @pdev:  platform device we're unregistering
+ *
+ *     Unregistration is done in 2 steps. First we release all resources
+ *     and remove it from the subsystem, then we drop reference count by
+ *     calling platform_device_put().
+ */
+void platform_device_unregister(struct platform_device * pdev)
+{
+       platform_device_del(pdev);
+       platform_device_put(pdev);
+}
+EXPORT_SYMBOL_GPL(platform_device_unregister);
 
 /**
  *     platform_device_register_simple
@@ -355,6 +378,7 @@ error:
        platform_device_put(pdev);
        return ERR_PTR(retval);
 }
+EXPORT_SYMBOL_GPL(platform_device_register_simple);
 
 static int platform_drv_probe(struct device *_dev)
 {
@@ -428,6 +452,37 @@ void platform_driver_unregister(struct platform_driver *drv)
 EXPORT_SYMBOL_GPL(platform_driver_unregister);
 
 
+/* modalias support enables more hands-off userspace setup:
+ * (a) environment variable lets new-style hotplug events work once system is
+ *     fully running:  "modprobe $MODALIAS"
+ * (b) sysfs attribute lets new-style coldplug recover from hotplug events
+ *     mishandled before system is fully running:  "modprobe $(cat modalias)"
+ */
+static ssize_t
+modalias_show(struct device *dev, struct device_attribute *a, char *buf)
+{
+       struct platform_device  *pdev = to_platform_device(dev);
+       int len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->name);
+
+       return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+
+static struct device_attribute platform_dev_attrs[] = {
+       __ATTR_RO(modalias),
+       __ATTR_NULL,
+};
+
+static int platform_uevent(struct device *dev, char **envp, int num_envp,
+               char *buffer, int buffer_size)
+{
+       struct platform_device  *pdev = to_platform_device(dev);
+
+       envp[0] = buffer;
+       snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name);
+       return 0;
+}
+
+
 /**
  *     platform_match - bind platform device to platform driver.
  *     @dev:   device.
@@ -472,10 +527,13 @@ static int platform_resume(struct device * dev)
 
 struct bus_type platform_bus_type = {
        .name           = "platform",
+       .dev_attrs      = platform_dev_attrs,
        .match          = platform_match,
+       .uevent         = platform_uevent,
        .suspend        = platform_suspend,
        .resume         = platform_resume,
 };
+EXPORT_SYMBOL_GPL(platform_bus_type);
 
 int __init platform_bus_init(void)
 {
@@ -504,14 +562,3 @@ u64 dma_get_required_mask(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dma_get_required_mask);
 #endif
-
-EXPORT_SYMBOL_GPL(platform_bus);
-EXPORT_SYMBOL_GPL(platform_bus_type);
-EXPORT_SYMBOL_GPL(platform_add_devices);
-EXPORT_SYMBOL_GPL(platform_device_register);
-EXPORT_SYMBOL_GPL(platform_device_register_simple);
-EXPORT_SYMBOL_GPL(platform_device_unregister);
-EXPORT_SYMBOL_GPL(platform_get_irq);
-EXPORT_SYMBOL_GPL(platform_get_resource);
-EXPORT_SYMBOL_GPL(platform_get_irq_byname);
-EXPORT_SYMBOL_GPL(platform_get_resource_byname);