| FocalTech EDT-FT5x06 Polytouch driver |
| ===================================== |
| |
| There are 3 variants of the chip for various touch panel sizes |
| FT5206GE1 2.8" .. 3.8" |
| FT5306DE4 4.3" .. 7" |
| FT5406EE8 7" .. 8.9" |
| FT5506EEG 7" .. 8.9" |
| |
| The software interface is identical for all those chips, so that |
| currently there is no need for the driver to distinguish between the |
| different chips. Nevertheless distinct compatible strings are used so |
| that a distinction can be added if necessary without changing the DT |
| bindings. |
| |
| |
| Required properties: |
| - compatible: "edt,edt-ft5206" |
| or: "edt,edt-ft5306" |
| or: "edt,edt-ft5406" |
| or: "edt,edt-ft5506" |
| |
| - reg: I2C slave address of the chip (0x38) |
| - interrupt-parent: a phandle pointing to the interrupt controller |
| serving the interrupt for this chip |
| - interrupts: interrupt specification for the touchdetect |
| interrupt |
| |
| Optional properties: |
| - reset-gpios: GPIO specification for the RESET input |
| - wake-gpios: GPIO specification for the WAKE input |
| |
| - pinctrl-names: should be "default" |
| - pinctrl-0: a phandle pointing to the pin settings for the |
| control gpios |
| |
| - threshold: allows setting the "click"-threshold in the range |
| from 20 to 80. |
| |
| - gain: allows setting the sensitivity in the range from 0 to |
| 31. Note that lower values indicate higher |
| sensitivity. |
| |
| - offset: allows setting the edge compensation in the range from |
| 0 to 31. |
| |
| Example: |
| polytouch: edt-ft5x06@38 { |
| compatible = "edt,edt-ft5406", "edt,edt-ft5x06"; |
| reg = <0x38>; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&edt_ft5x06_pins>; |
| interrupt-parent = <&gpio2>; |
| interrupts = <5 IRQ_TYPE_EDGE_FALLING>; |
| reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>; |
| wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>; |
| }; |
