linux-sg2042/drivers/usb
Stephen Warren 04c235c92c USB: ehci-tegra: remove redundant gpio_set_value
The immediately preceding gpio_direction_output() already set the value,
so there's no need to repeat it. This also prevents gpio_set_value() from
WARNing when the GPIO is sleepable (e.g. is on an I2C expander); the set
direction API is always sleepable, but plain set_value isn't.

Cc: <stable@vger.kernel.org> # v3.3
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-01 14:11:51 -04:00
..
atm module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
c67x00 usb: convert drivers/usb/* to use module_platform_driver() 2011-11-28 06:48:32 +09:00
class USB: cdc-wdm: fix race leading leading to memory corruption 2012-04-26 16:59:44 -07:00
core USB: EHCI: fix crash during suspend on ASUS computers 2012-04-24 13:55:43 -07:00
dwc3 usb: dwc3: Free event buffers array 2012-04-10 19:11:46 +03:00
early USB: EHCI: Support controllers with big endian capability regs 2011-05-03 11:43:21 -07:00
gadget usb: fixes for v3.4-rc cycle 2012-04-27 07:50:34 -07:00
host USB: ehci-tegra: remove redundant gpio_set_value 2012-05-01 14:11:51 -04:00
image USB: convert drivers/usb/* to use module_usb_driver() 2011-11-18 09:34:02 -08:00
misc USB: yurex: Fix missing URB_NO_TRANSFER_DMA_MAP flag in urb 2012-04-18 14:13:53 -07:00
mon usb: Add export.h for EXPORT_SYMBOL/THIS_MODULE where needed 2011-10-31 19:31:25 -04:00
musb usb: musb: davinci.c: add missing unregister 2012-04-18 13:50:54 +03:00
otg usb: otg: gpio_vbus: Add otg transceiver events and notifiers 2012-04-12 14:59:41 +03:00
renesas_usbhs Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-03-29 15:34:57 -07:00
serial USB: serial: cp210x: Fixed usb_control_msg timeout values 2012-04-20 08:44:24 -07:00
storage usb: storage: fix lockdep warning inside usb_stor_pre_reset(v2) 2012-04-06 13:54:00 -07:00
wusbcore uwb & wusb: fix kconfig error 2012-01-26 11:22:42 -08:00
Kconfig usb: Put USB Kconfig items back under USB. 2012-04-06 13:37:21 -07:00
Makefile USB: OTG should be linked before Host 2011-11-26 19:58:47 -08:00
README
usb-common.c usb: Provide usb_speed_string() function 2011-09-18 01:29:04 -07:00
usb-skeleton.c Revert "USB: usb-skeleton.c: fix open/disconnect race" 2012-01-24 12:02:38 -08:00

README

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.