mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-09 12:17:12 +09:00
0f5728d8fa
Add a missing ";" after EXPORT_SYMBOL() otherwise we run into following build error if Kernel Modules are supported: ---------- CC drivers/usb/phy/class-dual-role.o drivers/usb/phy/class-dual-role.c:91:1: error: expected ',' or ';' before 'int' int dual_role_get_property(struct dual_role_phy_instance *dual_role, ^ make[3]: *** [drivers/usb/phy/class-dual-role.o] Error 1 ---------- Signed-off-by: Amit Pundir <amit.pundir@linaro.org> (cherry picked from commit 9ff158f4c245c2fecb1489a4aae62ca67c0846a1) Change-Id: I7ec77584b3a753448ddc50a74204a20f4636f8a4 (cherry picked from commit f5af56b478111455ce9041d958b83f13bc742af6)
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.