input: maxim_sti: clean up the driver

Remove unnecessary macros and fix checkpatch errors.
Fix of_* apis to parse gpios and add pinctrl support.

Change-Id: I0ed7e31eb490ccf950e599469ff78338cae137d4
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>

Documentation/devicetree/bindings/input/touchscreen/maxim-sti.txt

@@ -0,0 +1,47 @@
+Maxim STI touch controller:
+
+Required properties:
+- spi-max-frequency: Maximum SPI frequency supported by the controller.
+- avdd-supply: analog power supply.
+- dvdd-supply: digial power supply.
+- maxim_sti,irq-gpio: irq gpio.
+- maxim_sti,reset-gpio: reset gpio.
+- maxim_sti,touch_fusion: path to touch_fusion daemon.
+- maxim_sti,config_file: path to config file.
+- maxim_sti,fw_name: name of firmware file.
+
+Optional properties:
+ - pinctrl-names	: this should be defined if a target uses pinctrl framework.
+			See "pinctrl" in documentation/devicetree/bindings/pinctrl/msm-pinctrl.txt.
+			It should specify the names of the configs that pinctrl can install in driver.
+			Following are the pinctrl configs that can be installed:
+			"pmx_ts_active" : active configuration of pins. This should specify active
+			config defined in pin groups of interrupt and reset gpios.
+			"pmx_ts_suspend" : disabled configuration of pins. This should specify sleep
+			config defined in pin groups of interrupt and reset gpios.
+
+Example:
+
+&spi_13 { /* BLSP1 QUP3 */
+	status = "ok";
+	maxim_sti@0 {
+		compatible = "maxim,maxim_sti";
+		reg = <0>;
+		interrupt-parent = <&msm_gpio>;
+		interrupts = <65 0>;
+		spi-max-frequency = <16000000>;
+		avdd-supply = <&pm8950_l17>;
+		dvdd-supply = <&pm8950_l6>;
+		spi-supply = <&pm8950_l5>;
+		maxim_sti,irq-gpio = <&msm_gpio 65 0x00>;
+		maxim_sti,reset-gpio = <&msm_gpio 64 0x00>;
+		maxim_sti,touch_fusion = "/vendor/bin/touch_fusion";
+		maxim_sti,config_file = "/vendor/firmware/touch_fusion_panel_id_0x%04x.cfg";
+		maxim_sti,fw_name = "maxim_fp35.bin";
+		pinctrl-names = "pmx_ts_active","pmx_ts_suspend","pmx_ts_release";
+		pinctrl-0 = <&ts_int_active &ts_reset_active>;
+		pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;
+		pinctrl-2 = <&ts_release>;
+       };
+};
+

drivers/input/touchscreen/Kconfig

@@ -1106,4 +1106,16 @@ config TOUCHSCREEN_ROHM_BU21023
 	  To compile this driver as a module, choose M here: the
 	  module will be called bu21023_ts.
 
+config TOUCHSCREEN_MAXIM_STI
+	tristate "Maxim based STI touchscreens"
+	depends on SPI_MASTER
+	help
+	  Say Y here if you have a touchscreen interface using the
+	  Maxim STI based touch controller.
+
+	  If unsure, say N
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called maxim_sti.
+
 endif

drivers/input/touchscreen/Makefile

@@ -45,6 +45,7 @@ obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)	+= intel-mid-touch.o
 obj-$(CONFIG_TOUCHSCREEN_IPROC)		+= bcm_iproc_tsc.o
 obj-$(CONFIG_TOUCHSCREEN_LPC32XX)	+= lpc32xx_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MAX11801)	+= max11801_ts.o
+obj-$(CONFIG_TOUCHSCREEN_MAXIM_STI)	+= maxim_sti.o
 obj-$(CONFIG_TOUCHSCREEN_MC13783)	+= mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MCS5000)	+= mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o

include/linux/input/maxim_sti.h

@@ -4,6 +4,7 @@
  *
  * Copyright (c)2013 Maxim Integrated Products, Inc.
  * Copyright (C) 2013, NVIDIA Corporation.  All Rights Reserved.
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -44,7 +45,6 @@
 * Netlink: common kernel/user space macros                                   *
 \****************************************************************************/
 
-//#define NL_BUF_SIZE  8192
 #define NL_BUF_SIZE  30720
 
 #define NL_ATTR_FIRST(nptr) \
@@ -118,11 +118,13 @@ nl_add_attr(void *buf, __u16 type, void *ptr, __u16 len)
 enum {
 	MC_DRIVER,
 	MC_FUSION,
-	MC_REQUIRED_GROUPS,
+	MC_EVENT_BROADCAST,
+	MC_GROUPS,
 };
 
 #define MC_DRIVER_NAME     "driver"
 #define MC_FUSION_NAME     "fusion"
+#define MC_EVENT_BROADCAST_NAME  "event_broadcast"
 
 #define NL_FAMILY_VERSION  1
 
@@ -344,8 +346,8 @@ struct maxim_sti_pdata {
 	u32       default_reset_state;
 	u32       tx_buf_size;
 	u32       rx_buf_size;
-	u32       gpio_reset;
+	int       gpio_reset;
-	u32       gpio_irq;
+	int       gpio_irq;
 	int       (*init)(struct maxim_sti_pdata *pdata, bool init);
 	void      (*reset)(struct maxim_sti_pdata *pdata, int value);
 	int       (*irq)(struct maxim_sti_pdata *pdata);