Device drivers infrastructure

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Date: Mon, 2 May 2011 08:26:09 -0700
From: Randy Dunlap <rdunlap@xenotime.net>
To: wanlong.gao@gmail.com
Cc: gregkh@suse.de, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH 1/2] KernelDoc:Add the device driver-model structures to
 kerneldoc
Message-Id: <20110502082609.77b23473.rdunlap@xenotime.net>
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	<1304348681-24950-2-git-send-email-wanlong.gao@gmail.com>
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On Mon,  2 May 2011 23:04:40 +0800 wanlong.gao@gmail.com wrote:

> From: Wanlong Gao <wanlong.gao@gmail.com>
> 
> Add the comment the structure bus_type, device_driver, device,
> class for generating the driver-model kerneldoc.

Warning: trailing whitespace in lines 66,478,498,499 of include/linux/device.h

Other than that:

Acked-by: Randy Dunlap <rdunlap@xenotime.net>

Thanks.

Greg, do you want to merge this or should I?


> Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
> ---
>  Documentation/DocBook/device-drivers.tmpl |    6 +-
>  include/linux/device.h                    |  104 ++++++++++++++++++++++++++++-
>  2 files changed, 104 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
> index 36f63d4..5e482e0 100644
> --- a/Documentation/DocBook/device-drivers.tmpl
> +++ b/Documentation/DocBook/device-drivers.tmpl
> @@ -96,10 +96,10 @@ X!Iinclude/linux/kobject.h
>  
>    <chapter id="devdrivers">
>       <title>Device drivers infrastructure</title>
> +     <sect1><title>The Basic Device Driver-Model Structure </title>
> +!Iinclude/linux/device.h
> +     </sect1>
>       <sect1><title>Device Drivers Base</title>
> -<!--
> -X!Iinclude/linux/device.h
> --->
>  !Edrivers/base/driver.c
>  !Edrivers/base/core.c
>  !Edrivers/base/class.c
> diff --git a/include/linux/device.h b/include/linux/device.h
> index ab8dfc0..5258d5d 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -47,6 +47,23 @@ extern int __must_check bus_create_file(struct bus_type *,
>  					struct bus_attribute *);
>  extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
>  
> +/**
> + * struct bus_type - The bus type of the device .
> + *
> + * @name:	The name of the bus
> + * @bus_attrs:	The attributes of the bus
> + * @dev_attrs:	The default attributes of the devices on the bus
> + * @drv_attrs:	The default attributes of the device drivers on the bus
> + * @match:	Attaching drivers to devices
> + * @uevent:	Add the environment variable for device plug
> + * @probe:	Probe the device
> + * @remove:	Remove the device
> + * @shutdown:	Shutdown method
> + * @suspend:	Suspend method
> + * @resume:	Resume method
> + * @pm:		Device power management operations
> + * @p:		The private data the subsystem
> + */ 
>  struct bus_type {
>  	const char		*name;
>  	struct bus_attribute	*bus_attrs;
> @@ -119,6 +136,23 @@ extern int bus_unregister_notifier(struct bus_type *bus,
>  extern struct kset *bus_get_kset(struct bus_type *bus);
>  extern struct klist *bus_get_device_klist(struct bus_type *bus);
>  
> +/**
> + * struct device_driver - The basic device driver structure
> + * @name:	Name of the device driver
> + * @bus:	The bus the device driver belongs to
> + * @owner:	The driver's owner
> + * @mod_name:	Used for built-in modules
> + * @suppress_bind_attrs:Disables bind/unbind via sysfs
> + * @of_match_table:Id table for matching the driver to device
> + * @probe:	Called to bound a driver to the device
> + * @remove:	Called to unbind a driver from a device
> + * @shutdown:	Called when shutdown
> + * @suspend:	Called to put the device in a low power state
> + * @resume:	Used to bring a device from a low power state
> + * @groups:	Driver's attribute groups
> + * @pm:		Device's power management operations
> + * @p:		Driver's private data
> + */
>  struct device_driver {
>  	const char		*name;
>  	struct bus_type		*bus;
> @@ -185,8 +219,24 @@ struct device *driver_find_device(struct device_driver *drv,
>  				  struct device *start, void *data,
>  				  int (*match)(struct device *dev, void *data));
>  
> -/*
> - * device classes
> +/**
> + * struct class - device classes
> + * @name:	Name of the class
> + * @owner:	Class' owner
> + * @class_attrs:The attributes of the class
> + * @dev_attrs:	The default attributes of the device belongs to the class
> + * @dev_bin_attrs:The default binary attributes of the device belongs to the class
> + * @dev_kobj:	Kobject of the class
> + * @dev_uevent:	Used to plug
> + * @devnode:	Callback to provide the devtmpfs
> + * @class_release:Called to release the class
> + * @dev_release:Called to release the device
> + * @suspend:	Used to put the device to a low power state
> + * @resume:	Used to bring the device from a low power state
> + * @ns_type:	Callbacks so sysfs can detemine namespaces
> + * @namespace:	Namespace of the device
> + * @pm:		The default device power management operations
> + * @p:		The private data of the subsystem
>   */
>  struct class {
>  	const char		*name;
> @@ -401,6 +451,54 @@ struct device_dma_parameters {
>  	unsigned long segment_boundary_mask;
>  };
>  
> +/**
> + * struct device - The basic device structure.
> + * @parent:	Parent of the device.
> + * @p:		Hold the private to the driver core portions of the device.
> + * 		See the comment of the struct device_private for detail.
> + * @kobj:	A top-level, abstract class from which other classes are derived.
> + * @init_name:	Initial name of the device.
> + * @type:	The type of device.
> + * 		This identifies the device type and carries type-specific
> + * 		information.
> + * @mutex:	Mutex to synchronize calls to its driver.
> + * @bus:	Type of bus device is on.
> + * @driver:	Which driver has allocated this
> + * @platform_data:Platform data specific to the device.
> + * 		Example..For devices on custom boards, as typical of embedded
> + * 		and SOC based hardware, Linux often uses platform_data to point
> + * 		to board-specific structures describing devices and how they
> + * 		are wired.  That can include what ports are available, chip
> + * 		variants, which GPIO pins act in what additional roles, and so
> + * 		on.  This shrinks the "Board Support Packages" (BSPs) and
> + * 		minimizes board-specific #ifdefs in drivers.
> + * @power:	For device power management.
> + * 		See the Documentation/power/devices.txt for details.
> + * @pwr_domain:	Provide callbacks that are executed during system suspend,
> + * 		hibernation, system resume and during runtime PM transitions 
> + * 		along with subsystem-level and driver-level callbacks.
> + * @numa_node:	NUMA node this device is close to.
> + * @dma_mask:	Dma mask (if dma'ble device).
> + * @coherent_dma_mask:Like dma_mask, but for alloc_coherent mapping as not all
> + * 		hardware supports 64 bit addresses for consistent allocations
> + * 		such description.
> + * @dma_parms:	A low level driver may set these to teach IOMMU code about
> + * 		segment limitations.
> + * @dma_pools:	Dma pools (if dma'ble device) .
> + * @dma_mem:	Internal for coherent mem override.
> + * @archdata:	For arch specific additions.
> + * @of_node:	Associated device tree node.
> + * @of_match:	Matching of_device_id from driver.
> + * @devt:	For creating the sysfs "dev".
> + * @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.
> + * @class:	The class of the device.
> + * @groups:	Optional attribute groups.
> + * @release:	Callback to free the device after all references have 
> + * 		gone away. This should be set by the allocator of the 
> + * 		device (i.e. the bus driver that discovered the device).
> + */
>  struct device {
>  	struct device		*parent;
>  
> @@ -611,7 +709,7 @@ extern int (*platform_notify)(struct device *dev);
>  extern int (*platform_notify_remove)(struct device *dev);
>  
>  
> -/**
> +/*
>   * get_device - atomically increment the reference count for the device.
>   *
>   */
> -- 
> 1.7.4.1
> 


---
~Randy
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