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Add runtime pm support for all clock controller units (CMU), which belong to power domains and require special handling during on/off operations. Typically special values has to be written to MUX registers to change internal clocks parents to OSC clock before turning power off. During such operation all clocks, which enter CMU has to be enabled to let MUX to stabilize. Also for each CMU there is one special parent clock, which has to be enabled all the time when any access to CMU registers is being done. This patch solves most of the mysterious external abort and freeze issues caused by a lack of proper parent CMU clock enabled or incorrect turn off procedure. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/1503302703-13801-4-git-send-email-m.szyprowski@samsung.com
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.