The Cirrus Logic Madera codecs have a range of GPIO pins that can be
used as single-bit logic input or output. These are presented as a
standard GPIO binding.
The second cell in a GPIO binding is currently reserved for future use
as chip-specific flags.
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
Changes from V1:
- moved out of main gpio patch into a separate patch
- added gpio-line-names as an optional property
.../devicetree/bindings/gpio/gpio-madera.txt | 27 ++++++++++++++++++++++
1 file changed, 27 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-madera.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-madera.txt b/Documentation/devicetree/bindings/gpio/gpio-madera.txt
new file mode 100644
index 0000000..6254f5b
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-madera.txt
@@ -0,0 +1,27 @@
+Cirrus Logic Madera class audio codecs gpio driver
+
+This is a subnode of the parent mfd node.
+
+See also the core bindings for the parent MFD driver:
+See Documentation/devicetree/bindings/mfd/madera.txt
+
+Required properties:
+ - compatible : must be "cirrus,madera-gpio"
+ - gpio-controller : Indicates this device is a GPIO controller.
+ - #gpio-cells : Must be 2. The first cell is the pin number. The second cell
+ is reserved for future use and must be zero
+
+Optional properties:
+ - gpio-line-names : as described in bindings/gpio/gpio.txt
+
+Example:
+
+cs47l85@0 {
+ compatible = "cirrus,cs47l85";
+
+ gpio {
+ compatible = "cirrus,madera-gpio";
+ gpio-controller;
+ #gpio-cells = <2>;
+ }
+};
--
1.9.1
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