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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/STMicroelectronics.txt | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/STMicroelectronics.txt b/Documentation/devicetree/bindings/input/touchscreen/STMicroelectronics.txt new file mode 100644 index 000000000000..7799392700a7 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/STMicroelectronics.txt @@ -0,0 +1,54 @@ +STMicroelectronics touch controller + +The STMicroelectronics controller is connected to host processor +via i2c. The controller generates interrupts when the +user touches the panel. The host controller is expected +to read the touch coordinates over i2c and pass the coordinates +to the rest of the system. + +Required properties: + + - compatible : should be "st,fts". + - 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. + - vdd-supply : Power supply needed to power up the device. + - vcc-supply : Power source required to power up i2c bus. + - st,irq-gpio : irq gpio which is to provide interrupts to host, + same as "interrupts" node. It will also + contain active low or active high information. + - st,reset-gpio : reset gpio to control the reset of chip. + - pinctrl-names : This should be defined if a target uses pinctrl framework. + See "pinctrl" in Documentation/devicetree/bindings/pinctrl/msm-pinctrl.txt. + 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 gpio. + "pmx_ts_suspend" : Disabled configuration of pins, this should specify sleep + config defined in pin groups of interrupt and reset gpio. + "pmx_ts_release" : Release configuration of pins, this should specify + release config defined in pin groups of interrupt and reset gpio. + - st,regulator_avdd : name of Power supply needed to power up the device. + - st,regulator_dvdd : name of Power source required to power up i2c bus. +Optional properties: + + +Example: + i2c@78b9000 { /* BLSP1 QUP5 */ + st_fts@49 { + compatible = "st,fts"; + reg = <0x49>; + interrupt-parent = <&msm_gpio>; + interrupts = <13 0x2008>; + vdd-supply = <&pm8916_l17>; + vcc-supply = <&pm8916_l6>; + pinctrl-names = "pmx_ts_active","pmx_ts_suspend"; + pinctrl-0 = <&ts_int_active &ts_reset_active>; + pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>; + st,irq-gpio = <&msm_gpio 13 0x00000001>; + st,reset-gpio = <&msm_gpio 12 0x0>; + st,regulator_dvdd = "vdd"; + st,regulator_avdd = "avdd"; + }; + }; |