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

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 <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
sm00th · Jan 22, 2021 · 731e97e · 731e97e
1 parent 19c329f
commit 731e97e
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Documentation/firmware-guide/acpi/gpio-properties.rst b/Documentation/firmware-guide/acpi/gpio-properties.rst
@@ -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::