forked from luck/tmp_suning_uos_patched
f7f50b2a7b
We can suspend the mdm6600 over USB via sysfs and then mdm6600 enters a low-power idle mode. In the low-power mode, mdm6600 radio and n_gsm uart are functional but we need to use USB mode0 GPIO pin to send a wake-up pulse to the modem to talk with it over n_gsm. As the GPIO mode0 line is dual purposed and and also needed by the USB PHY driver to boot mdm6600 into the correct USB mode, let's also manage the wake-up GPIO in the USB PHY driver. For the USB PHY idle, there does not anything specific we need to do for runtime PM after getting the PHY configured. The PHY framework already idles the USB PHY when not in use separately from the mdm6600 state. It seems that it takes about 100 - 200ms for mdm6600 to wake up from the low-power idle mode. And then mdm6600 stays awake about 1.2s until it needs to be kicked again. The mdm6600 status GPIO pins don't seem to change state when mdm6600 changes between normal and idle mode. Let's manage the mdm6600 mode with runtime PM. If phy-mapphone-mdm6600 sysfs entry for power/control is set to "on", we keep mdm6600 out of idle by kicking the GPIO line. If the entry is set to "auto" we let mdm6600 enter low-power state. Cc: Marcel Partap <mpartap@gmx.net> Cc: Merlijn Wajer <merlijn@wizzup.org> Cc: Michael Scott <hashcode0f@gmail.com> Cc: NeKit <nekit1000@gmail.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Sebastian Reichel <sre@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.
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.