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Step 1. Modify Makefile: Modify drivers/input/touchscreen/Makefile,add a new line into it : obj-$(CONFIG_TOUCHSCREEN_GT9XX) += gt9xx/ Step 2. Modify Kconfig Modify drivers/input/touchscreen/Kconfig, include our kconfig under TOUCHSCREEN source "drivers/input/touchscreen/gt9xx/Kconfig" Step 3. Port dtsi: Port kernel/arch/arm/boot/dts/goodix-gt9xx-i2c.dtsi into platform dts During the porting, please set right value into below fields interrupt-parent = <&msm_gpio>; interrupts = <13 0x2800>; reset-gpios = <&msm_gpio 12 0x0>; irq-gpios = <&msm_gpio 13 0x2800>; touchscreen-size-x = <1080>; touchscreen-size-y = <1920>; Step 4. Implement Pinctrl Goodix dts declared 4 pinctrl: <&ts_int_default>; <&ts_int_output_low>;<&ts_int_output_high>;<&ts_int_input>; Please implement them in pinctrl dts. kernel/arch/arm/boot/dts/msm8916-pinctrl.dtsi is an example. Step 5. Modify defconfig Please refer kernel/arch/arm/configs/msm_defconfig . CONFIG_TOUCHSCREEN_GT9XX=y CONFIG_TOUCHSCREEN_GT9XX_UPDATE=y CONFIG_TOUCHSCREEN_GT9XX_DEBUG=y Step 6. The porting is done, please compile.
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