Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
02e479808b
Currently calls to: gpiod_direction_output_raw() gpiod_set_raw_value() gpiod_set_raw_array_value() gpiod_set_raw_value_cansleep() gpiod_set_raw_array_value_cansleep() Respect that we do not want to invert the value written, but will still apply special open drain/open source semantics if the line has an open drain/open source flag. It also forbids us from driving an output marked as an interrupt line. This does not fit with the function name and expected semantics. In the w1 host driver (for example) we need to handle a line as open drain but sometimes force it to pull up, which means we should be able to use the gpiod_set_raw_value() for this, but it currently does not work. There are also use cases where users actually want to drive a line used by an interrupt. This is what they should be expected to use the *raw* accessors for. I have looked over the current users of this API and they do not seem to be using the *raw* accessors with open drain or open source so let's augment this behaviour before we have users expecting the inconsistent semantic. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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README
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.