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Richard Leitner 1cbd53c8cd usb: core: introduce per-port over-current counters
For some userspace applications information on the number of
over-current conditions at specific USB hub ports is relevant.

In our case we have a series of USB hardware (using the cp210x driver)
which communicates using a proprietary protocol. These devices sometimes
trigger an over-current situation on some hubs. In case of such an
over-current situation the USB devices offer an interface for reducing
the max used power. As these conditions are quite rare and imply
performance reductions of the device we don't want to reduce the max
power always.

Therefore give user-space applications the possibility to react
adequately by introducing an over_current_counter in the usb port struct
which is exported via sysfs.

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-22 13:07:05 +01:00
arch Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-03-18 12:03:15 -07:00
block
certs
crypto
Documentation usb: core: introduce per-port over-current counters 2018-03-22 13:07:05 +01:00
drivers usb: core: introduce per-port over-current counters 2018-03-22 13:07:05 +01:00
firmware
fs for-4.16-rc5-tag 2018-03-16 13:37:42 -07:00
include phy: for 4.17 2018-03-20 10:10:46 +01:00
init
ipc
kernel Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-03-18 12:03:15 -07:00
lib
LICENSES
mm
net
samples
scripts
security
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tools Merge branch 4.16-rc6 into usb-next 2018-03-20 09:56:08 +01:00
usr
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MAINTAINERS MAINTAINERS: Update maintainer for dwc2 2018-03-20 10:13:30 +01:00
Makefile Linux 4.16-rc6 2018-03-18 17:48:42 -07:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.