Add open_path method as an alternative to open (to allow use of udev symlinks). #130
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Prep for adding open_path Python method in doceme#129
Prep for adding open_path Python method in doceme#129
Adds to the functionality provided by the open() call (which hard-codes the opening of /dev/spidev<bus>.<chipselect> device file paths). Because the bus number allocation may not be knowable in advance (bus numbers are dynamically allocated by the Linux kernel), open_path() allows the user to employ udev rules to deterministically create a symlink to the correct hardware device at boot and/or hot-plug time. Part of doceme#129
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See: doceme/py-spidev#130 for explanation.
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See: doceme/py-spidev#130 for rationale and pre-requisite changes to py-spidev.
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See: doceme/py-spidev#130 for rationale and pre-requisite changes to py-spidev.
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See: doceme/py-spidev#130 for rationale and pre-requisite changes to py-spidev.
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See: doceme/py-spidev#130 for rationale and pre-requisite changes to py-spidev.
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See: doceme/py-spidev#130 for rationale and pre-requisite changes to py-spidev.
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This is a PR which resolves #129 by adding an
open_pathmethod (an alternative toopen) and also includes documentation and for why and when this is useful, as well as a sample set of udev rules illustrating some common use-cases.