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>

Documentation/devicetree/bindings/input/ti,drv260x.txt

@@ -0,0 +1,51 @@
+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

drivers/input/misc/Kconfig

@@ -676,4 +676,15 @@ config INPUT_SOC_BUTTON_ARRAY
 	  To compile this driver as a module, choose M here: the
 	  module will be called soc_button_array.
 
+config INPUT_DRV260X_HAPTICS
+	tristate "TI DRV260X haptics support"
+	depends on INPUT && I2C && GPIOLIB
+	select INPUT_FF_MEMLESS
+	select REGMAP_I2C
+	help
+	  Say Y to enable support for the TI DRV260X haptics driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called drv260x-haptics.
+
 endif

drivers/input/misc/Makefile

@@ -26,6 +26,7 @@ obj-$(CONFIG_INPUT_COBALT_BTNS)		+= cobalt_btns.o
 obj-$(CONFIG_INPUT_DA9052_ONKEY)	+= da9052_onkey.o
 obj-$(CONFIG_INPUT_DA9055_ONKEY)	+= da9055_onkey.o
 obj-$(CONFIG_INPUT_DM355EVM)		+= dm355evm_keys.o
+obj-$(CONFIG_INPUT_DRV260X_HAPTICS)	+= drv260x.o
 obj-$(CONFIG_INPUT_GP2A)		+= gp2ap002a00f.o
 obj-$(CONFIG_INPUT_GPIO_BEEPER)		+= gpio-beeper.o
 obj-$(CONFIG_INPUT_GPIO_TILT_POLLED)	+= gpio_tilt_polled.o

include/dt-bindings/input/ti-drv260x.h

@@ -0,0 +1,36 @@
+/*
+ * DRV260X haptics driver family
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * Copyright:   (C) 2014 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _DT_BINDINGS_TI_DRV260X_H
+#define _DT_BINDINGS_TI_DRV260X_H
+
+/* Calibration Types */
+#define DRV260X_LRA_MODE		0x00
+#define DRV260X_LRA_NO_CAL_MODE	0x01
+#define DRV260X_ERM_MODE		0x02
+
+/* Library Selection */
+#define DRV260X_LIB_EMPTY			0x00
+#define DRV260X_ERM_LIB_A			0x01
+#define DRV260X_ERM_LIB_B			0x02
+#define DRV260X_ERM_LIB_C			0x03
+#define DRV260X_ERM_LIB_D			0x04
+#define DRV260X_ERM_LIB_E			0x05
+#define DRV260X_LIB_LRA			0x06
+#define DRV260X_ERM_LIB_F			0x07
+
+#endif

include/linux/platform_data/drv260x-pdata.h

@@ -0,0 +1,28 @@
+/*
+ * Platform data for DRV260X haptics driver family
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * Copyright:   (C) 2014 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _LINUX_DRV260X_PDATA_H
+#define _LINUX_DRV260X_PDATA_H
+
+struct drv260x_platform_data {
+	u32 library_selection;
+	u32 mode;
+	u32 vib_rated_voltage;
+	u32 vib_overdrive_voltage;
+};
+
+#endif