mirror of https://gitee.com/openkylin/linux.git
68de2fe57a
It's quite questionable whether genpd internally should care about if the corresponding PM domain for a device is powered on, as to allow setting a new performance state for it. The assumptions creates an unnecessary limitation at this point, for both consumers and providers, but more importantly it also makes the code more complicated. Therefore, let's simplify the code to allow setting a performance state, by invoking the ->set_performance_state() callback, no matter whether the PM domain is powered on or off. Do note, this change means genpd providers needs to restore the performance state themselves during power on, via the ->power_on() callback. Moreover, they may also need to check that the PM domain is powered on, from their ->set_performance_state() callback, before deciding to update the state. Tested-by: Rajendra Nayak <rnayak@codeaurora.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> |
||
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| 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 | ||
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.