[PATCH v3 4/4] mfd: max77693: Update DT binding to support haptic

[Jaewon Kim <jaewon02.kim@samsung.com>]

This patch add haptic DT binding documentation and example
to support haptic driver in max77693 Multifunction device.

Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 Documentation/devicetree/bindings/mfd/max77693.txt |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
index 11921cc..d178b9e 100644
--- a/Documentation/devicetree/bindings/mfd/max77693.txt
+++ b/Documentation/devicetree/bindings/mfd/max77693.txt
@@ -27,6 +27,17 @@ Optional properties:
 
 	[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
 
+- haptic : The haptic of max77693 have to be instantiated under subnod
+  named "haptic" using the following haptic format in example.
+  Haptic sensation from motor can be changed by changing a period cycle in pwms.
+
+ Required properties:
+	- compatible : Must be "maxim,max77693-hpatic"
+	- haptic-supply : power supply for haptic motor
+		[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
+	- pwms : phandle to the physical PWM device,
+		[*] refer Documentation/devicetree/bindings/pwm/pwm.txt
+
 Example:
 	max77693@66 {
 		compatible = "maxim,max77693";
@@ -52,4 +63,11 @@ Example:
 					regulator-boot-on;
 			};
 		};
+
+		haptic {
+			compatible = "maxim,max77693-haptic";
+			haptic-supply = <&haptic_supply>;
+			pwms = <&pwm 0 40000 0>;
+			pwm-names = "haptic";
+		};
 	};
-- 
1.7.9.5