driver core: Introduce device_find_child().

[deliverable/linux.git] / include / linux / device.h

diff --git a/include/linux/device.h b/include/linux/device.h
index 662e6a10144e5b453b2ad11b02fc7314bd33816e..0a0370c74181a1d0cabcacd680725020497c7c40 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -21,6 +21,7 @@
 #include <linux/pm.h>
 #include <asm/semaphore.h>
 #include <asm/atomic.h>
+#include <asm/device.h>
 
 #define DEVICE_NAME_SIZE       50
 #define DEVICE_NAME_HALF       __stringify(20) /* Less than half to accommodate slop */
@@ -42,6 +43,8 @@ struct bus_type {
        struct klist            klist_devices;
        struct klist            klist_drivers;
 
+       struct blocking_notifier_head bus_notifier;
+
        struct bus_attribute    * bus_attrs;
        struct device_attribute * dev_attrs;
        struct driver_attribute * drv_attrs;
@@ -75,6 +78,29 @@ int __must_check bus_for_each_drv(struct bus_type *bus,
                struct device_driver *start, void *data,
                int (*fn)(struct device_driver *, void *));
 
+/*
+ * Bus notifiers: Get notified of addition/removal of devices
+ * and binding/unbinding of drivers to devices.
+ * In the long run, it should be a replacement for the platform
+ * notify hooks.
+ */
+struct notifier_block;
+
+extern int bus_register_notifier(struct bus_type *bus,
+                                struct notifier_block *nb);
+extern int bus_unregister_notifier(struct bus_type *bus,
+                                  struct notifier_block *nb);
+
+/* All 4 notifers below get called with the target struct device *
+ * as an argument. Note that those functions are likely to be called
+ * with the device semaphore held in the core, so be careful.
+ */
+#define BUS_NOTIFY_ADD_DEVICE          0x00000001 /* device added */
+#define BUS_NOTIFY_DEL_DEVICE          0x00000002 /* device removed */
+#define BUS_NOTIFY_BOUND_DRIVER                0x00000003 /* driver bound to device */
+#define BUS_NOTIFY_UNBIND_DRIVER       0x00000004 /* driver about to be
+                                                     unbound */
+
 /* driverfs interface for exporting bus attributes */
 
 struct bus_attribute {
@@ -343,8 +369,6 @@ struct device {
        void            *driver_data;   /* data private to the driver */
        void            *platform_data; /* Platform specific data, device
                                           core doesn't touch it */
-       void            *firmware_data; /* Firmware specific data (e.g. ACPI,
-                                          BIOS data),reserved for device core*/
        struct dev_pm_info      power;
 
        u64             *dma_mask;      /* dma mask (if dma'able device) */
@@ -358,6 +382,8 @@ struct device {
 
        struct dma_coherent_mem *dma_mem; /* internal for coherent mem
                                             override */
+       /* arch specific additions */
+       struct dev_archdata     archdata;
 
        /* class_device migration path */
        struct list_head        node;
@@ -393,8 +419,10 @@ extern void device_unregister(struct device * dev);
 extern void device_initialize(struct device * dev);
 extern int __must_check device_add(struct device * dev);
 extern void device_del(struct device * dev);
-extern int __must_check device_for_each_child(struct device *, void *,
+extern int device_for_each_child(struct device *, void *,
                     int (*fn)(struct device *, void *));
+extern struct device *device_find_child(struct device *, void *data,
+                                       int (*match)(struct device *, void *));
 extern int device_rename(struct device *dev, char *new_name);
 
 /*
@@ -415,8 +443,6 @@ extern struct device *device_create(struct class *cls, struct device *parent,
                                    __attribute__((format(printf,4,5)));
 extern void device_destroy(struct class *cls, dev_t devt);
 
-extern int virtual_device_parent(struct device *dev);
-
 /*
  * Platform "fixup" functions - allow the platform to have their say
  * about devices and actions that the general device layer doesn't