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Add sysfs ABI documentation for the attribute files module_id and module_name Add debugfs ABI documentation for reading input from the shift registers and reading last written output or write output to the shift registers. Link: https://lore.kernel.org/r/20190812161118.21476-4-marek.behun@nic.cz Signed-off-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
24 lines
860 B
Plaintext
24 lines
860 B
Plaintext
What: /sys/kernel/debug/moxtet/input
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Date: March 2019
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KernelVersion: 5.3
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Contact: Marek Behún <marek.behun@nic.cz>
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Description: (R) Read input from the shift registers, in hexadecimal.
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Returns N+1 bytes, where N is the number of Moxtet connected
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modules. The first byte is from the CPU board itself.
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Example: 101214
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10: CPU board with SD card
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12: 2 = PCIe module, 1 = IRQ not active
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14: 4 = Peridot module, 1 = IRQ not active
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What: /sys/kernel/debug/moxtet/output
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Date: March 2019
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KernelVersion: 5.3
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Contact: Marek Behún <marek.behun@nic.cz>
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Description: (RW) Read last written value to the shift registers, in
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hexadecimal, or write values to the shift registers, also
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in hexadecimal.
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Example: 0102
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01: 01 was last written, or is to be written, to the
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first module's shift register
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02: the same for second module
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