72 lines
3.0 KiB
Plaintext
72 lines
3.0 KiB
Plaintext
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Mstar touch controller
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The mstar controller is connected to host processor
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via i2c. The controller generates interrupts when the
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user touches the panel. The host controller is expected
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to read the touch coordinates over i2c and pass the coordinates
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to the rest of the system.
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Required properties:
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- compatible : should be "mstar,msg21xx"
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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-supply : Power supply needed to power up the device
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- vcc_i2c-supply : Power source required to power up i2c bus
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- mstar,irq-gpio : irq gpio which is to provide interrupts to host,
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same as "interrupts" node. It will also
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contain active low or active high information.
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- mstar,reset-gpio : reset gpio to control the reset of chip
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- mstar,display-coords : display coords in pixels. It is a four
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tuple consisting of min x, min y, max x and
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max y values
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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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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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- mstar,num-max-touches: It defines the maximum number of touch supported by the controller.
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- mstar,hard-reset-delay-ms : hard reset delay in ms
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- mstar,post-hard-reset-delay-ms : post hard reset delay in ms
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Optional properties:
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- mstar,button-map : button map of key codes. It is a three tuple consisting of key codes.
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- mstar,panel-coords : panel coords for the chip in pixels.
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It is a four tuple consisting of min x,
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min y, max x and max y values
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- mstar,ic-type : It defines the ic-type of the controller. Values are as folows:
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1 -> msg2133.
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2 -> msg21xxA.
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3 -> msg26xxM.
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Example:
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i2c@78b9000 { /* BLSP1 QUP5 */
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mstar@26 {
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compatible = "mstar,msg21xx";
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reg = <0x26>;
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interrupt-parent = <&msm_gpio>;
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interrupts = <13 0x2008>;
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mstar,irq-gpio = <&msm_gpio 13 0x00000001>;
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mstar,reset-gpio = <&msm_gpio 12 0x0>;
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vdd-supply = <&pm8916_l17>;
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vcc_i2c-supply = <&pm8916_l6>;
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mstar,display-coords = <0 0 480 854>;
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pinctrl-names = "pmx_ts_active","pmx_ts_suspend";
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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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mstar,button-map = <172 139 158>;
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mstar,ic-type = <2>;
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mstar,num_max_touches = <2>;
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mstar,hard-reset-delay-ms = <100>;
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mstar,post-hard-reset-delay-ms = <100>;
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};
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};
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