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When several devices are sharing one hardware SPI CS, there is no visual clue in `lsgpio` or in /sys/kernel/debug/gpio about which one is which one. Stuff depends on the enumeration order, and therefore lower chip addresses always go first, but that's just an implementation detail. This change includes the device-specific address in the debug output: gpiochip4: GPIOs 464-479, parent: spi/spi1.1, mcp23s17.2, can sleep: gpiochip3: GPIOs 480-495, parent: spi/spi1.1, mcp23s17.1, can sleep: 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.