tree ffdba860f530a3b71ebaff015ec4f81b1863b105
parent 936ab346873dae2dcf7e93d2bb999abb2c7da856
author Geert Uytterhoeven <geert+renesas@glider.be> 1574695222 +0100
committer Geert Uytterhoeven <geert+renesas@glider.be> 1584961762 +0100

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.