driver core: remove the driver-model structures from the documentation
Remove the struct bus_type, class, device, device_driver from the driver-model docs. With another patch add them to device.h, since they are out of date. That will keep things up to date and provide a better way to document this stuff. Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com> Acked-by: Harry Wei <harryxiyou@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -3,24 +3,7 @@ Bus Types
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Definition
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~~~~~~~~~~
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struct bus_type {
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char * name;
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struct subsystem subsys;
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struct kset drivers;
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struct kset devices;
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struct bus_attribute * bus_attrs;
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struct device_attribute * dev_attrs;
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struct driver_attribute * drv_attrs;
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int (*match)(struct device * dev, struct device_driver * drv);
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int (*hotplug) (struct device *dev, char **envp,
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int num_envp, char *buffer, int buffer_size);
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int (*suspend)(struct device * dev, pm_message_t state);
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int (*resume)(struct device * dev);
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};
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See the kerneldoc for the struct bus_type.
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int bus_register(struct bus_type * bus);
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@ -27,22 +27,7 @@ The device class structure looks like:
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typedef int (*devclass_add)(struct device *);
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typedef void (*devclass_remove)(struct device *);
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struct device_class {
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char * name;
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rwlock_t lock;
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u32 devnum;
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struct list_head node;
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struct list_head drivers;
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struct list_head intf_list;
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struct driver_dir_entry dir;
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struct driver_dir_entry device_dir;
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struct driver_dir_entry driver_dir;
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devclass_add add_device;
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devclass_remove remove_device;
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};
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See the kerneldoc for the struct class.
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A typical device class definition would look like:
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@ -2,96 +2,7 @@
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The Basic Device Structure
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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struct device {
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struct list_head g_list;
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struct list_head node;
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struct list_head bus_list;
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struct list_head driver_list;
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struct list_head intf_list;
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struct list_head children;
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struct device * parent;
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char name[DEVICE_NAME_SIZE];
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char bus_id[BUS_ID_SIZE];
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spinlock_t lock;
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atomic_t refcount;
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struct bus_type * bus;
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struct driver_dir_entry dir;
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u32 class_num;
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struct device_driver *driver;
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void *driver_data;
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void *platform_data;
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u32 current_state;
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unsigned char *saved_state;
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void (*release)(struct device * dev);
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};
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Fields
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~~~~~~
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g_list: Node in the global device list.
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node: Node in device's parent's children list.
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bus_list: Node in device's bus's devices list.
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driver_list: Node in device's driver's devices list.
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intf_list: List of intf_data. There is one structure allocated for
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each interface that the device supports.
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children: List of child devices.
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parent: *** FIXME ***
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name: ASCII description of device.
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Example: " 3Com Corporation 3c905 100BaseTX [Boomerang]"
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bus_id: ASCII representation of device's bus position. This
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field should be a name unique across all devices on the
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bus type the device belongs to.
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Example: PCI bus_ids are in the form of
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<bus number>:<slot number>.<function number>
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This name is unique across all PCI devices in the system.
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lock: Spinlock for the device.
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refcount: Reference count on the device.
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bus: Pointer to struct bus_type that device belongs to.
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dir: Device's sysfs directory.
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class_num: Class-enumerated value of the device.
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driver: Pointer to struct device_driver that controls the device.
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driver_data: Driver-specific data.
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platform_data: Platform data specific to the device.
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Example: for devices on custom boards, as typical of embedded
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and SOC based hardware, Linux often uses platform_data to point
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to board-specific structures describing devices and how they
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are wired. That can include what ports are available, chip
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variants, which GPIO pins act in what additional roles, and so
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on. This shrinks the "Board Support Packages" (BSPs) and
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minimizes board-specific #ifdefs in drivers.
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current_state: Current power state of the device.
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saved_state: Pointer to saved state of the device. This is usable by
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the device driver controlling the device.
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release: Callback to free the device after all references have
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gone away. This should be set by the allocator of the
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device (i.e. the bus driver that discovered the device).
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See the kerneldoc for the struct device.
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Programming Interface
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@ -1,23 +1,7 @@
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Device Drivers
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struct device_driver {
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char * name;
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struct bus_type * bus;
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struct completion unloaded;
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struct kobject kobj;
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list_t devices;
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struct module *owner;
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int (*probe) (struct device * dev);
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int (*remove) (struct device * dev);
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int (*suspend) (struct device * dev, pm_message_t state);
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int (*resume) (struct device * dev);
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};
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See the kerneldoc for the struct device_driver.
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Allocation
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