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authorLaxman Dewangan <ldewangan@nvidia.com>2016-05-13 10:49:12 +0530
committerLinus Walleij <linus.walleij@linaro.org>2016-06-07 09:35:15 +0200
commitf72677939cf582118bd645c5015605577db74b25 (patch)
tree745020b5bedce4ae780a2cbfa110f3c7cc9f873a /Documentation
parentaf8c34ce6ae32addda3788d54a7e340cad22516b (diff)
gpio: add DT binding doc for gpio of PMIC max77620/max20024
Maxim Semiconductor's PMIC MAX77620/MAX20024 has 8 GPIO pins which act as GPIO as well as special function mode. Add DT binding document to support these pins in GPIO mode via GPIO framework. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-max77620.txt25
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diff --git a/Documentation/devicetree/bindings/gpio/gpio-max77620.txt b/Documentation/devicetree/bindings/gpio/gpio-max77620.txt
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+++ b/Documentation/devicetree/bindings/gpio/gpio-max77620.txt
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+GPIO driver for MAX77620 Power management IC from Maxim Semiconductor.
+
+Device has 8 GPIO pins which can be configured as GPIO as well as the
+special IO functions.
+
+Required properties:
+-------------------
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells : Should be two. The first cell is the pin number and
+ the second cell is used to specify the gpio polarity:
+ 0 = active high
+ 1 = active low
+For more details, please refer generic GPIO DT binding document
+<devicetree/bindings/gpio/gpio.txt>.
+
+Example:
+--------
+#include <dt-bindings/mfd/max77620.h>
+...
+max77620@3c {
+ compatible = "maxim,max77620";
+
+ gpio-controller;
+ #gpio-cells = <2>;
+};