2024-09-09 08:52:07 +00:00
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Atmel touch controller
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Required properties:
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- compatible : should be "atmel,mxt-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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- vdd_ana-supply : Analog power supply needed to power device
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- atmel,irq-gpio : irq gpio
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- atmel,reset-gpio : reset gpio
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- atmel,family-id : family identification of the controller
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- atmel,variant-id : variant identification of the controller
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- atmel,version : firmware version of the controller
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- atmel,build : firmware build number of the controller
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2024-09-09 08:57:42 +00:00
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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 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 and reset gpio.
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"pmx_ts_release" : Release configuration of pins, this should specify
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release config defined in pin groups of interrupt and reset gpio.
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2024-09-09 08:52:07 +00:00
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Required for firmware update only:
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- atmel,fw-name : firmware name to use for flashing firmware
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- atmel,bootldr-id : bootloader identification of the controller
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Optional property:
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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,config : configuration parameter for the controller
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- atmel,i2c-pull-up : specify to indicate pull up is needed
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- vcc_i2c-supply : Power source required to pull up i2c bus
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- atmel,dig-reg-support : specify to indicate digital regulator is
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needed
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- atmel,need-calibration : specify to indicate whether calibration is
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needed during wakeup.
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- atmel,no-force-update : flag that signifies whether force configuration
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update is applicable or not
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2024-09-09 08:57:42 +00:00
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- atmel,no-lpm-support : flag that signifies whether low power mode is
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supported or not on this platform
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- atmel,i2cmode-gpio : specify gpio number for i2cmode, which provides
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internal pull-ups to i2c bus in case there
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is no hardware pull-up support
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- atmel,panel-coords : touch panel minimum x, minimum y, maximum x and
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maximum y resolution. Used to configure the input
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device.
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- atmel,display-coords : LCD display minimum x, minimum y, maximum x and
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maximum y resolution. Used to configure the input
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device.
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- atmel,vkey-codes : virtual key code mappings to be used when touch controller
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does not support sending keycodes and sends coordinates
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instead. In this case user space programs need to translate
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coordinates to keycodes instead. Virtual key region sits
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between display's lower bound and touchscreen's lower bound.
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Horizontally these keys are evenly distributed between touch
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boundaries. These codes map to buttons from left to right
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according to icons on the touch panel. The value of these
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codes is taken from include/uapi/linux/input.h. If
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atmel,vkey-codes are specified, it is mandatory to specify
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atmel,panel-coords and atmel,display-coords as well because
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rectangular area of each of the virtual key is derived using
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these two properties.
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- atmel,create-vkeys : Define this property to create vkey entries for Atmel
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touchscreen driver. This is used when there are multiple Atmel
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touchscreen controllers, and everyone has to support virtual
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keys. Following are the mandatory properties that must be
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defined inside the cfg nodes:
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- atmel,family-id
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- atmel,panel-coords
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- atmel,display-coords
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- atmel,vkey-codes
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2024-09-09 08:52:07 +00:00
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Example:
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i2c@f9966000 {
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cell-index = <3>;
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compatible = "qcom,i2c-qup";
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reg = <0xf9966000 0x1000>;
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#address-cells = <1>;
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#size-cells = <0>;
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reg-names = "qup_phys_addr";
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interrupts = <0 104 0>;
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interrupt-names = "qup_err_intr";
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qcom,i2c-bus-freq = <100000>;
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qcom,i2c-src-freq = <24000000>;
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atmel_mxt_ts@4a {
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compatible = "atmel,mxt-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_ana-supply = <&pm8941_l18>;
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vcc_i2c-supply = <&pm8941_lvs1>;
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2024-09-09 08:57:42 +00:00
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/* pins used by touchscreen */
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pinctrl-names = "pmx_ts_active","pmx_ts_suspend", "pmx_ts_release";
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pinctrl-0 = <&ts_int_active &ts_reset_active>;
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pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;
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pinctrl-2 = <&ts_release>;
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2024-09-09 08:52:07 +00:00
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atmel,i2c-pull-up;
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atmel,no-force-update;
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atmel,dig-reg-support;
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atmel,key-codes = <
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102 139 0 0 0 0 0 0
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0 158 217 0 0 0 0 0
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0 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0 >;
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atmel,irq-gpio = <&msmgpio 48 0>;
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atmel,reset-gpio = <&msmgpio 26 0>;
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2024-09-09 08:57:42 +00:00
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atmel,create-vkeys;
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2024-09-09 08:52:07 +00:00
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atmel,cfg_1 {
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atmel,family-id = <0x81>;
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atmel,variant-id = <0x01>;
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atmel,version = <0x10>;
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atmel,build = <0xaa>;
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2024-09-09 08:57:42 +00:00
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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,vkey-codes = <139 172 158 217>;
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2024-09-09 08:52:07 +00:00
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atmel,config = [
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/* Object 6, Instance = 0 */
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00 00 00 00 00 00
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/* Object 38, Instance = 0 */
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15 00 02 10 08 0C 00 00
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/* Object 7, Instance = 0 */
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FF FF 32 03
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/* Object 8, Instance = 0 */
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0F 00 0A 0A 00 00 0A 00 00 00
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/* Object 9, Instance = 0 */
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83 00 00 18 0E 00 70 32 02 01
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00 03 01 01 05 0A 0A 0A 90 05
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F8 02 00 00 0F 0F 00 00 48 2D
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07 0C 00 00 00 00
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/* Object 15, Instance = 0 */
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00 00 00 00 00 00 00 00 00 00
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00
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/* Object 18, Instance = 0 */
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00 00
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/* Object 19, Instance = 0 */
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00 00 00 00 00 00
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/* Object 23, Instance = 0 */
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00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00
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/* Object 25, Instance = 0 */
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00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00
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/* Object 40, Instance = 0 */
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00 00 00 00 00
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/* Object 42, Instance = 0 */
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00 00 00 00 00 00 00 00 00 00
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/* Object 46, Instance = 0 */
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00 00 10 10 00 00 03 00 00 01
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/* Object 47, Instance = 0 */
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08 0A 28 0A 02 0A 00 8C 00 20
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00 00 00
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/* Object 55, Instance = 0 */
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00 00 00 00 00 00
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/* Object 56, Instance = 0 */
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03 00 01 18 05 05 05 05 05 05
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05 05 05 05 05 05 05 05 05 05
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05 05 05 05 05 05 05 05 00 00
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00 00 00 00 00 00 00 00 00 00
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00 00
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/* Object 57, Instance = 0 */
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00 00 00
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/* Object 61, Instance = 0 */
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00 00 00 00 00
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/* Object 61, Instance = 1 */
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00 00 00 00 00
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/* Object 62, Instance = 0 */
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7F 03 00 16 00 00 00 00 00 00
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04 08 10 18 05 00 0A 05 05 50
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14 19 34 1A 64 00 00 04 40 00
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00 00 00 00 30 32 02 00 01 00
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05 00 00 00 00 00 00 00 00 00
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00 00 0C 00
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];
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}
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}
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};
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