aboutsummaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt')
-rw-r--r--Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
index b279b6072bd5..a58f79f5345c 100644
--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -45,6 +45,23 @@ Optional properties:
- fck_parent : Should contain a valid clock name which will be used as parent
for the McASP fck
+Optional GPIO support:
+If any McASP pin need to be used as GPIO then the McASP node must have:
+...
+ gpio-controller
+ #gpio-cells = <2>;
+...
+
+When requesting a GPIO, the first parameter is the PIN index in McASP_P*
+registers.
+For example to request the AXR2 pin of mcasp8:
+function-gpios = <&mcasp8 2 0>;
+
+Or to request the ACLKR pin of mcasp8:
+function-gpios = <&mcasp8 29 0>;
+
+For generic gpio information, please refer to bindings/gpio/gpio.txt
+
Example:
mcasp0: mcasp0@1d00000 {