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When dt_to_map_one_config() is called with a pinctrl_dev passed in, it should only be using this if the node being looked up is a hog. The code was always using the passed pinctrl_dev without checking whether the dt node referred to it. A pin controller can have pinctrl-n dependencies on other pin controllers in these cases: - the pin controller hardware is external, for example I2C, so needs other pin controller(s) to be setup to communicate with the hardware device. - it is a child of a composite MFD so its of_node is shared with the parent MFD and other children of that MFD. Any part of that MFD could have dependencies on other pin controllers. Because of this, dt_to_map_one_config() can't assume that if it has a pinctrl_dev passed in then the node it looks up must be a hog. It could be a reference to some other pin controller. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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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.