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