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>;
       };
};