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Documentation: ACPI: add new rule for gpio-line-names

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The gpio-line-names lists must respect some rules.

This patch adds a new rule in documentation, to avoid
the use of duplicate names in the same gpiochip.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Flavio Suligoi 2021-01-08 16:24:47 +01:00 committed by Rafael J. Wysocki
parent 19c329f680
commit 731e97e076
1 changed files with 1 additions and 0 deletions
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Documentation/firmware-guide/acpi/gpio-properties.rst
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@ -146,6 +146,7 @@ following rules (see also the examples):
other words, it is not mandatory to fill all the GPIO lines
- empty names are allowed (two quotation marks ``""`` correspond to an empty
name)
- names inside one GPIO controller/expander must be unique
Example of a GPIO controller of 16 lines, with an incomplete list with two
empty names::