Mauri Sandberg bc08210145 gpio: gpio-cascade: add generic GPIO cascade ...

Adds support for building cascades of GPIO lines. That is, it allows
setups when there is one upstream line and multiple cascaded lines, out
of which one can be chosen at a time. The status of the upstream line
can be conveyed to the selected cascaded line or, vice versa, the status
of the cascaded line can be conveyed to the upstream line.

A multiplexer is being used to select, which cascaded GPIO line is being
used at any given time.

At the moment only input direction is supported. In future it should be
possible to add support for output direction, too.

Signed-off-by: Mauri Sandberg <maukka@ext.kapsi.fi>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

2025-11-10 20:25:23 -03:00

56 KiB

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