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The Cannon Lake Windows GPIO driver always exposes 32 pins per "bank" regardless of whether the hardware actually has that many pins in a pad group. This means that there are gaps in the GPIO number space even if such gaps do not exist in the real hardware. To make things worse the BIOS is also using the same scheme, so for example on Cannon Lake-LP vGPIO 39 (vSD3_CD_B) the ACPI GpioInt resource has number 231 instead of the expected 180 (which would be the hardware number). To make SD card detection and other GPIOs working properly in Linux we align the pinctrl-cannonlake GPIO numbering to follow the Windows GPIO driver numbering taking advantage of the gpio_base field introduced in the previous patch. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 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.