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This is a bit more involved because the pinctrl core so far always assumed that one device (with a unique dev_name) only contains a single pinctrl thing. This is not true for the mcp23s08 driver for chips connected over SPI. They have a "logical address" which means that several chips can share one physical CS signal. A downside of this patch are some possibly ugly names for the debugfs entries, such as "spi1.1-mcp23xxx-pinctrl.2", etc. Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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.