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When add a platform device by calling ci_hdrc_add_device(), this device will reuse OF node of its parent device. If power-domains property is provided in the OF node, both two platform devices will be attached to the same power domain. This should be unnecessary and may bring other inconsistent behavior. For example, to support wakeup capability, these two platform device need different power domain state. The parent device need NOT power domain on for out-band interrupt, but the ci_hdrc device need power domain on for in-band interrupt. The i.MX95 Soc support out-band wakeup interrupt, the user need to enable wakeup for the parent device, but if the user also enable wakeup for ci_hdrc device, the power domain will keep at on state finally. To exclude such inconsistent behavior and simplify the power management, detach power domain for ci_hdrc platform device. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Xu Yang <xu.yang_2@nxp.com> Acked-by: Peter Chen <peter.chen@kernel.org> Tested-by: Xu Yang <xu.yang_2@nxp.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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 reStructuredText 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.