Input: drv260x - add TI drv260x haptics driver

Add the TI drv260x haptics/vibrator driver.  This device uses the input
force feedback to produce a wave form to driver an ERM or LRA actuator
device.

The initial driver supports the devices real time playback mode.  But the
device has additional wave patterns in ROM. This functionality will be
added in future patchsets.

Product data sheet is located here: http://www.ti.com/product/drv2605

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/input/ti,drv260x.txt b/Documentation/devicetree/bindings/input/ti,drv260x.txt
new file mode 100644
index 000000000000..a9c8519eb9de
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+++ b/Documentation/devicetree/bindings/input/ti,drv260x.txt
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+Texas Instruments - drv260x Haptics driver family
+
+The drv260x family serial control bus communicates through I2C protocols
+
+Required properties:
+        - compatible - One of:
+                "ti,drv2604" - DRV2604
+                "ti,drv2605" - DRV2605
+                "ti,drv2605l" - DRV2605L
+        - reg -  I2C slave address
+        - vbat-supply - Required supply regulator
+        - mode - Power up mode of the chip (defined in include/dt-bindings/input/ti-drv260x.h)
+                DRV260X_LRA_MODE - Linear Resonance Actuator mode (Piezoelectric)
+                DRV260X_LRA_NO_CAL_MODE - This is a LRA Mode but there is no calibration
+                                sequence during init.  And the device is configured for real
+                                time playback mode (RTP mode).
+                DRV260X_ERM_MODE - Eccentric Rotating Mass mode (Rotary vibrator)
+        - library-sel - These are ROM based waveforms pre-programmed into the IC.
+                                This should be set to set the library to use at power up.
+                                (defined in include/dt-bindings/input/ti-drv260x.h)
+                DRV260X_LIB_EMPTY - Do not use a pre-programmed library
+                DRV260X_ERM_LIB_A - Pre-programmed Library
+                DRV260X_ERM_LIB_B - Pre-programmed Library
+                DRV260X_ERM_LIB_C - Pre-programmed Library
+                DRV260X_ERM_LIB_D - Pre-programmed Library
+                DRV260X_ERM_LIB_E - Pre-programmed Library
+                DRV260X_ERM_LIB_F - Pre-programmed Library
+                DRV260X_LIB_LRA - Pre-programmed LRA Library
+
+Optional properties:
+        - enable-gpio - gpio pin to enable/disable the device.
+        - vib-rated-mv - The rated voltage of the actuator in millivolts.
+                          If this is not set then the value will be defaulted to
+                          3.2 v.
+        - vib-overdrive-mv - The overdrive voltage of the actuator in millivolts.
+                          If this is not set then the value will be defaulted to
+                          3.2 v.
+Example:
+
+drv2605l: drv2605l@5a {
+                compatible = "ti,drv2605l";
+                reg = <0x5a>;
+                enable-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+                mode = <DRV260X_LRA_MODE>;
+                library-sel = <DRV260X_LIB_LRA>;
+                vib-rated-mv = <3200>;
+                vib-overdriver-mv = <3200>;
+};
+
+For more product information please see the link below:
+http://www.ti.com/product/drv2605