McASP pins can be used as GPIO, add optional section to enable GPIO support
for McASP.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
- 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 {