docs: gpio: Add GPIO Aggregator documentation
Document the GPIO Aggregator, and the two typical use-cases.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Tested-by: Eugeniu Rosca <erosca@de.adit-jv.com>
---
v6:
- Fix "allows" without object:
-> provides a mechanism to aggregate GPIOs,
-> provides access control for a set of one or more GPIOs,
-> allows the user to communicate,
- Drop "gpiochipN" support,
- Extend example,
v5:
- Add Reviewed-by, Tested-by,
- Fix inconsistent indentation,
v4:
- Add Reviewed-by,
- Drop controversial GPIO repeater,
- Clarify industrial control use case,
- Fix typo s/communicated/communicate/,
- Replace abstract frobnicator example by concrete door example with
gpio-line-names,
v3:
- New.
2 files changed
