struct_bus_type9
The bus type of the device
Usage
const char
*
name;
const char
*
dev_name;
struct device
*
dev_root;
struct device_attribute
*
dev_attrs;
const struct
attribute_group
**
bus_groups;
const struct
attribute_group
**
dev_groups;
const struct
attribute_group
**
drv_groups;
int (*
match)
(struct
device
*dev,
struct
device_driver
*drv);
int (*
uevent)
(struct
device
*dev,
struct
kobj_uevent_env
*env);
int (*
probe)
(struct
device
*dev);
int (*
remove)
(struct
device
*dev);
void (*
shutdown)
(struct
device
*dev);
int (*
online)
(struct
device
*dev);
int (*
offline)
(struct
device
*dev);
int (*
suspend)
(struct
device
*dev,
pm_message_t
state);
int (*
resume)
(struct
device
*dev);
const struct
dev_pm_ops
*
pm;
struct iommu_ops
*
iommu_ops;
struct subsys_private
*
p;
struct lock_class_key
lock_key;
Members
name
The name of the bus.
dev_name
Used for subsystems to enumerate devices like (“foou”, dev->id).
dev_root
Default device to use as the parent.
dev_attrs
Default attributes of the devices on the bus.
bus_groups
Default attributes of the bus.
dev_groups
Default attributes of the devices on the bus.
drv_groups
Default attributes of the device drivers on the bus.
match
Called, perhaps multiple times, whenever a new device or driver is added for this bus. It should return a nonzero value if the given device can be handled by the given driver.
uevent
Called when a device is added, removed, or a few other things that generate uevents to add the environment variables.
probe
Called when a new device or driver add to this bus, and callback the specific driver's probe to initial the matched device.
remove
Called when a device removed from this bus.
shutdown
Called at shut-down time to quiesce the device.
online
Called to put the device back online (after offlining it).
offline
Called to put the device offline for hot-removal. May fail.
suspend
Called when a device on this bus wants to go to sleep mode.
resume
Called to bring a device on this bus out of sleep mode.
pm
Power management operations of this bus, callback the specific device driver's pm-ops.
iommu_ops
IOMMU specific operations for this bus, used to attach IOMMU driver implementations to a bus and allow the driver to do bus-specific setup
p
The private data of the driver core, only the driver core can touch this.
lock_key
Lock class key for use by the lock validator
Overview
A bus is a channel between the processor and one or more devices. For the purposes of the device model, all devices are connected via a bus, even if it is an internal, virtual, “platform” bus. Buses can plug into each other. A USB controller is usually a PCI device, for example. The device model represents the actual connections between buses and the devices they control. A bus is represented by the bus_type structure. It contains the name, the default attributes, the bus' methods, PM operations, and the driver core's private data.
History
- Debian 8 (Jessie): the text shown here
- Debian 7 (Wheezy)