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8f6707bf2b
If the USB device is connected to a host, the CPU cannot be suspended or else the USB device appears to be disconnected from the host's point of view. Only after a "USB suspend" state has been entered (as set by the host) or the host is disconnected can the system safely be suspended: in both these states, the clock is stopped. As such, this patch associates a "wake lock" with the running clock of the UDC to keep the system awake as long as the host maintains the USB connection active. Signed-off-by: Jonas Bonn <jonas@norrbonn.se> CC: Cristian Birsan <cristian.birsan@microchip.com> CC: Felipe Balbi <balbi@kernel.org> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Nicolas Ferre <nicolas.ferre@microchip.com> CC: Alexandre Belloni <alexandre.belloni@bootlin.com> CC: Ludovic Desroches <ludovic.desroches@microchip.com> CC: linux-arm-kernel@lists.infradead.org CC: linux-usb@vger.kernel.org Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> |
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| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
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| net | ||
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| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| .gitignore | ||
| .mailmap | ||
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.