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.suli...@asem.it>
---
Documentation/firmware-guide/acpi/gpio-properties.rst | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/firmware-guide/acpi/gpio-properties.rst
b/Documentation/firmware-guide/acpi/gpio-properties.rst
index b36aa3e743d8..4e264c16ddff 100644
--- 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::
--
2.25.1
