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| author | Flavio Suligoi <f.suligoi@asem.it> | 2021-01-08 16:24:47 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-01-22 16:31:01 +0100 |
| commit | 731e97e0769805cdebfd7d2b19a7d3f6abcace09 (patch) | |
| tree | d8d33477fff2bcbcec85d2c25cacea9610ebe853 /Documentation/firmware-guide | |
| parent | 19c329f6808995b142b3966301f217c831e7cf31 (diff) | |
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 <f.suligoi@asem.it>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/firmware-guide')
| -rw-r--r-- | Documentation/firmware-guide/acpi/gpio-properties.rst | 1 |
1 files changed, 1 insertions, 0 deletions
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:: |