* struct bus_type - The bus type of the device
*
* @name: The name of the bus.
+ * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
+ * @dev_root: Default device to use as the parent.
* @bus_attrs: Default attributes of the bus.
* @dev_attrs: Default attributes of the devices on the bus.
* @drv_attrs: Default attributes of the device drivers on the bus.
*/
struct bus_type {
const char *name;
+ const char *dev_name;
+ struct device *dev_root;
struct bus_attribute *bus_attrs;
struct device_attribute *dev_attrs;
struct driver_attribute *drv_attrs;
struct subsys_private *p;
};
-extern int __must_check bus_register(struct bus_type *bus);
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define bus_register(subsys) \
+({ \
+ static struct lock_class_key __key; \
+ __bus_register(subsys, &__key); \
+})
+extern int __must_check __bus_register(struct bus_type *bus,
+ struct lock_class_key *key);
extern void bus_unregister(struct bus_type *bus);
extern int __must_check bus_rescan_devices(struct bus_type *bus);
/* iterator helpers for buses */
+struct subsys_dev_iter {
+ struct klist_iter ki;
+ const struct device_type *type;
+};
+void subsys_dev_iter_init(struct subsys_dev_iter *iter,
+ struct bus_type *subsys,
+ struct device *start,
+ const struct device_type *type);
+struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
+void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
int (*fn)(struct device *dev, void *data));
struct device *bus_find_device_by_name(struct bus_type *bus,
struct device *start,
const char *name);
-
+struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
+ struct device *hint);
int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
void *data, int (*fn)(struct device_driver *, void *));
-
void bus_sort_breadthfirst(struct bus_type *bus,
int (*compare)(const struct device *a,
const struct device *b));
extern void driver_remove_file(struct device_driver *driver,
const struct driver_attribute *attr);
-extern int __must_check driver_add_kobj(struct device_driver *drv,
- struct kobject *kobj,
- const char *fmt, ...);
-
extern int __must_check driver_for_each_device(struct device_driver *drv,
struct device *start,
void *data,
struct device *start, void *data,
int (*match)(struct device *dev, void *data));
+/**
+ * struct subsys_interface - interfaces to device functions
+ * @name: name of the device function
+ * @subsys: subsytem of the devices to attach to
+ * @node: the list of functions registered at the subsystem
+ * @add_dev: device hookup to device function handler
+ * @remove_dev: device hookup to device function handler
+ *
+ * Simple interfaces attached to a subsystem. Multiple interfaces can
+ * attach to a subsystem and its devices. Unlike drivers, they do not
+ * exclusively claim or control devices. Interfaces usually represent
+ * a specific functionality of a subsystem/class of devices.
+ */
+struct subsys_interface {
+ const char *name;
+ struct bus_type *subsys;
+ struct list_head node;
+ int (*add_dev)(struct device *dev, struct subsys_interface *sif);
+ int (*remove_dev)(struct device *dev, struct subsys_interface *sif);
+};
+
+int subsys_interface_register(struct subsys_interface *sif);
+void subsys_interface_unregister(struct subsys_interface *sif);
+
+int subsys_system_register(struct bus_type *subsys,
+ const struct attribute_group **groups);
+
/**
* struct class - device classes
* @name: Name of the class.
struct kobject *dev_kobj;
int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, mode_t *mode);
+ char *(*devnode)(struct device *dev, umode_t *mode);
void (*class_release)(struct class *class);
void (*dev_release)(struct device *dev);
const char *name;
const struct attribute_group **groups;
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, mode_t *mode);
+ char *(*devnode)(struct device *dev, umode_t *mode);
void (*release)(struct device *dev);
const struct dev_pm_ops *pm;
const char *buf, size_t count);
};
-#define DEVICE_ATTR(_name, _mode, _show, _store) \
-struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
+struct dev_ext_attribute {
+ struct device_attribute attr;
+ void *var;
+};
+
+ssize_t device_show_ulong(struct device *dev, struct device_attribute *attr,
+ char *buf);
+ssize_t device_store_ulong(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count);
+ssize_t device_show_int(struct device *dev, struct device_attribute *attr,
+ char *buf);
+ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count);
-extern int __must_check device_create_file(struct device *device,
- const struct device_attribute *entry);
+#define DEVICE_ATTR(_name, _mode, _show, _store) \
+ struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
+#define DEVICE_ULONG_ATTR(_name, _mode, _var) \
+ struct dev_ext_attribute dev_attr_##_name = \
+ { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }
+#define DEVICE_INT_ATTR(_name, _mode, _var) \
+ struct dev_ext_attribute dev_attr_##_name = \
+ { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }
+
+extern int device_create_file(struct device *device,
+ const struct device_attribute *entry);
extern void device_remove_file(struct device *dev,
const struct device_attribute *attr);
extern int __must_check device_create_bin_file(struct device *dev,
extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp);
extern void devm_kfree(struct device *dev, void *p);
+void __iomem *devm_request_and_ioremap(struct device *dev,
+ struct resource *res);
+
struct device_dma_parameters {
/*
* a low level driver may set these to teach IOMMU code about
* @archdata: For arch-specific additions.
* @of_node: Associated device tree node.
* @devt: For creating the sysfs "dev".
+ * @id: device instance
* @devres_lock: Spinlock to protect the resource of the device.
* @devres_head: The resources list of the device.
* @knode_class: The node used to add the device to the class list.
struct device_node *of_node; /* associated device tree node */
dev_t devt; /* dev_t, creates the sysfs "dev" */
+ u32 id; /* device instance */
spinlock_t devres_lock;
struct list_head devres_head;
extern int device_move(struct device *dev, struct device *new_parent,
enum dpm_order dpm_order);
extern const char *device_get_devnode(struct device *dev,
- mode_t *mode, const char **tmp);
+ umode_t *mode, const char **tmp);
extern void *dev_get_drvdata(const struct device *dev);
extern int dev_set_drvdata(struct device *dev, void *data);
#define sysfs_deprecated 0
#endif
+/**
+ * module_driver() - Helper macro for drivers that don't do anything
+ * special in module init/exit. This eliminates a lot of boilerplate.
+ * Each module may only use this macro once, and calling it replaces
+ * module_init() and module_exit().
+ *
+ * @__driver: driver name
+ * @__register: register function for this driver type
+ * @__unregister: unregister function for this driver type
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define module_driver(__driver, __register, __unregister) \
+static int __init __driver##_init(void) \
+{ \
+ return __register(&(__driver)); \
+} \
+module_init(__driver##_init); \
+static void __exit __driver##_exit(void) \
+{ \
+ __unregister(&(__driver)); \
+} \
+module_exit(__driver##_exit);
+
#endif /* _DEVICE_H_ */
projects / karo-tx-linux.git / blobdiff