86 lines
3.6 KiB
Plaintext
86 lines
3.6 KiB
Plaintext
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Atmel touch controller
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Required properties:
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- compatible : should be "atmel,maxtouch-ts"
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- reg : i2c slave address of the device
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- interrupt-parent : parent of interrupt
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- interrupts : touch sample interrupt to indicate presense or release
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of fingers on the panel.
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- atmel,panel-coords : touch panel minimum x, minimum y, maximum x and
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maximum y resolution
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- atmel,display-coords : LCD display minimum x, minimum y, maximum x and
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maximum y resolution
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- vdd-supply : digital power supply. It powers up the digital
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block of the controller to enable i2c communication.
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- avdd-supply : analog Power supply. It powers up the analog
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channel block of the controller to detect the touches.
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- atmel,irq-gpio : irq gpio
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- atmel,reset-gpio : reset gpio
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Optional property:
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- atmel,cfg-name : Configuration file name with file extension as "raw".
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Default value maxtouch_generic_cfg.raw.
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- atmel,ignore-crc : Boolean flag to ignore cyclic redundancy check (CRC) on
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configuration
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- xvdd-supply : x-line drive voltage supply. It is used for charging
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the capacitors on the touch panel.
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- atmel,bl-addr : bootloader address, by default is looked up
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in mxt_slave_addresses structure
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- atmel,key-codes : key codes corresponding to keyarray object
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- atmel,i2cmode-gpio : i2cmode gpio. This pin is used for selecting the i2c communication mode.
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Pull the line low for HID and high for STANDARD i2c.
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- pinctrl-names : This should be defined if a target uses pinctrl framework.
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See "pinctrl" in Documentation/devicetree/bindings/pinctrl/msm-pinctrl.txt.
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It should specify the names of the configs that pinctrl can install in driver.
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Following are the pinctrl configs that can be installed:
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"pmx_ts_active" : Active configuration of pins, this should specify active
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config defined in pin groups of interrupt, i2cmode and reset gpio.
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"pmx_ts_suspend" : Disabled configuration of pins, this should specify sleep
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config defined in pin groups of interrupt, i2cmode and reset gpio.
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- clocks : specify the clocks associated with the underlying bus when secure touch
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is enabled.
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This property is required only if secure touch is enabled and used with
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this driver.
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- clock-names: : clock names used for secure touch. The names are:
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"iface_clk", "core_clk".
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Optional sub-child properties:
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The sub-child properties are used to identify different firmware versions supported.
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- atmel,version : Firmware version of the controller
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- atmel,build : Firmware build of the controller
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- atmel,fw-name : Firmware file name for the next upgrade. Do not specify this
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when the firmware version is latest.
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Example:
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i2c@f9966000 {
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atmel_maxtouch_ts@4a {
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compatible = "atmel,maxtouch-ts";
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reg = <0x4a>
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interrupt-parent = <&msmgpio>
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interrupts = <48 0x0>;
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vdd-supply = <&pm8941_l18>;
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avdd-supply = <&pm8941_lvs1>;
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xvdd-supply = <&pm8941_s4>;
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atmel,panel-coords = <0 0 479 799>;
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atmel,display-coords = <0 0 479 799>;
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atmel,irq-gpio = <&msmgpio 48 0>;
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atmel,reset-gpio = <&msmgpio 26 0>;
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atmel,i2cmode-gpio = <&msmgpio 27 0>;
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atmel,ignore-crc;
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pinctrl-names = "pmx_ts_active","pmx_ts_suspend";
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pinctrl-0 = <&ts_int_active &ts_reset_active &ts_i2cmode_active>;
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pinctrl-1 = <&ts_int_suspend &ts_reset_suspend &ts_i2cmode_suspend>;
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/* Underlying clocks used by secure touch */
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clock-names = "iface_clk", "core_clk";
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clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>,
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<&clock_gcc clk_gcc_blsp1_qup2_i2c_apps_clk>;
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atmel,cfg-name = "maxtouch_8994_liquid_cfg.raw";
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atmel,cfg_1 {
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atmel,version = <0x10>;
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atmel,build = <0xaa>;
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atmel,fw-name = "maxtouch_8994_liquid_v1_1_AB.fw";
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};
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};
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};
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