mfd: max77693: Update DT binding to support haptic

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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
index 11921cc417bf58584fd6c84212630dbeb6d4c62d..01e9f30fe6785f4b81eb396959961d0781b25d32 100644 (file)
--- a/Documentation/devicetree/bindings/mfd/max77693.txt
+++ b/Documentation/devicetree/bindings/mfd/max77693.txt
@@ -27,6 +27,20 @@ Optional properties:
 
        [*] refer Documentation/devicetree/bindings/regulator/regulator.txt
 
+- haptic : The MAX77693 haptic device utilises a PWM controlled motor to provide
+  users with tactile feedback. PWM period and duty-cycle are varied in
+  order to provide the approprite level of feedback.
+
+ Required properties:
+       - compatible : Must be "maxim,max77693-hpatic"
+       - haptic-supply : power supply for the haptic motor
+       [*] refer Documentation/devicetree/bindings/regulator/regulator.txt
+       - pwms : phandle to the physical PWM(Pulse Width Modulation) device.
+        PWM properties should be named "pwms". And number of cell is different
+        for each pwm device.
+        To get more informations, please refer to documentaion.
+       [*] refer Documentation/devicetree/bindings/pwm/pwm.txt
+
 Example:
        max77693@66 {
                compatible = "maxim,max77693";
@@ -52,4 +66,11 @@ Example:
                                        regulator-boot-on;
                        };
                };
+
+               haptic {
+                       compatible = "maxim,max77693-haptic";
+                       haptic-supply = <&haptic_supply>;
+                       pwms = <&pwm 0 40000 0>;
+                       pwm-names = "haptic";
+               };
        };