regulator: max77620: add documentation for MPOK property

Adding documentation for maxim,power-ok-control dts property

Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/mfd/max77620.txt b/Documentation/devicetree/bindings/mfd/max77620.txt
index 2ad44f7e48801502e21458ed8a3639d0af6592fd..9c16d51cc15b913ce900c622741eb51904224686 100644 (file)
--- a/Documentation/devicetree/bindings/mfd/max77620.txt
+++ b/Documentation/devicetree/bindings/mfd/max77620.txt
@@ -106,6 +106,18 @@ Here supported time periods by device in microseconds are as follows:
 MAX77620 supports 40, 80, 160, 320, 640, 1280, 2560 and 5120 microseconds.
 MAX20024 supports 20, 40, 80, 160, 320, 640, 1280 and 2540 microseconds.
 
+-maxim,power-ok-control: configure map power ok bit
+                       1: Enables POK(Power OK) to control nRST_IO and GPIO1
+                       POK function.
+                       0: Disables POK control.
+                       if property missing, do not configure MPOK bit.
+                       If POK mapping is enabled for GPIO1/nRST_IO then,
+                       GPIO1/nRST_IO pins are HIGH only if all rails
+                       that have POK control enabled are HIGH.
+                       If any of the rails goes down(which are enabled for POK
+                       control) then, GPIO1/nRST_IO goes LOW.
+                       this property is valid for max20024 only.
+
 For DT binding details of different sub modules like GPIO, pincontrol,
 regulator, power, please refer respective device-tree binding document
 under their respective sub-system directories.