下载 gt9xx 官方提供的 v2.4 驱动

附件GT9xx_Driver_for_Android_V2.4.0.1_20161104.zip

驱动部分

把 2.4 的驱动部分的源码文件复制到 /kernel/msm-4.9/drivers/input/touchscreen 下面的 gt9xx 文件夹下面，然后 复制修改 gt9xx_v2.8 下面的 Makefile 和 Kconfig。

Makefile

#
# Makefile for the Goodix gt9xx touchscreen driver.
#
#subdir-ccflags-y += -DDEBUG
EXTRA_CFLAGS +=-Wno-date-time
EXTRA_CFLAGS +=-Wno-error=date-time

obj-$(CONFIG_TOUCHSCREEN_GT9XX_v28)     += gt9xx.o
obj-$(CONFIG_TOUCHSCREEN_GT9XX_UPDATE)  += gt9xx_update.o
obj-$(CONFIG_TOUCHSCREEN_GT9XX_TOOL)    += goodix_tool.o

注意需要 EXTRA_CFLAGS，这两个如果不添加会报错 error: expansion of date or time macro is not reproducible

Kconfig

#
# Goodix GT9xx Touchscreen driver
#
config TOUCHSCREEN_GT9XX_v28
        bool "Goodix touchpanel GT9xx series"
        depends on I2C
        help
          Enable this for support Goodix GT9xx_v28 driver.

          Say Y here if you have a Goodix GT9xx touchscreen
          controller.

          If unsure, say N.

config TOUCHSCREEN_GT9XX_UPDATE
        tristate "Goodix GT9xx touch controller auto update support"
        depends on TOUCHSCREEN_GT9XX_v28
        help
          Enable this for support firmware update.

          Say Y here if you want update touch controller
          firmware.

          If unsure, say N.

config TOUCHSCREEN_GT9XX_TOOL
        tristate "Goodix GT9xx Tools for debuging"
        depends on TOUCHSCREEN_GT9XX_v28
        help
          This implement interface support for Goodix GT9xx
          touchscreen debug.

          Say Y here if you want to have a Android app debug interface
          to your system.

          If unsure, say N.

修改 touchscreen 下面的 Makefile, 修改为 obj-$(CONFIG_TOUCHSCREEN_GT9XX_v28) += gt9xx/， 删除 #obj-y += gt1x/

开启内核选项

首先确认哪个 config 对应最后的 .config，我这边的是 kernel/msm-4.9/arch/arm/configs/msm8937_defconfig，在最后增加：

CONFIG_TOUCHSCREEN_GT9XX_v28=y
CONFIG_TOUCHSCREEN_GT9XX_UPDATE=y
CONFIG_TOUCHSCREEN_GT9XX_TOOL=y

修改设备树

kernel/msm-4.9/arch/arm64/boot/dts/qcom/qm215-qrd.dtsi 修改 i2c 相关。仿照官方的 dts 和 qcom 的 apq8009-dragon.dts apq8053-lite-dragon-v2.2.dtsi

&i2c_3 { /* BLSP3 QUP1 (NFC) */
        status = "ok";
            goodix_ts@5d {
        compatible = "goodix,gt9xx";
        reg = <0x5d>;
        interrupt-parent = <&tlmm>;
        interrupts = <65 0x2>;
        goodix,rst-gpio  = <&tlmm 64 0x0>;
        goodix,irq-gpio = <&tlmm 65 0x2008>;
        goodix,power-gpio = <&tlmm 33 0x0>;
        vdd_ana-supply = <&pm8916_l10>;
        vcc_i2c-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>;

                touchscreen-max-id = <11>;
                touchscreen-size-x = <1200>;
                touchscreen-size-y = <1920>;
                touchscreen-max-w = <1024>;
                touchscreen-max-p = <1024>;

                goodix,type-a-report = <0>;
                goodix,driver-send-cfg = <1>;
                goodix,wakeup-with-reset = <0>;
                goodix,resume-in-workqueue = <0>;
                goodix,int-sync = <1>;
                goodix,swap-x2y = <0>;
                goodix,esd-protect = <1>;
                goodix,pen-suppress-finger = <0>;
                goodix,auto-update = <1>;
                goodix,auto-update-cfg = <0>;
                goodix,power-off-sleep = <0>;

                goodix,cfg-group0 = [
                        5A B0 04 80 07 0A 35 10 22 08 32 0D 50 3C 0A 04
                        01 01 00 B4 11 11 44 15 19 1B 14 95 35 FF 3A 3C
                        39 13 00 00 00 98 03 1C 00 00 00 00 03 00 00 00
                        00 80 0A 37 46 40 E5 52 23 28 00 04 81 38 00 7F
                        3B 00 7D 3E 00 7C 41 00 7A 44 0C 7A 00 50 33 50
                        0B 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                        00 00 00 00 00 00 00 55 00 01 00 00 02 00 00 00
                        1D 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E
                        0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 2A 29
                        28 27 26 25 24 23 22 21 20 1F 1E 1D 1C 1B 19 18
                        17 16 15 14 13 12 11 10 0F 0E 0D 0C 0B 0A 09 08
                        07 06 05 04 03 02 01 00 08 01
                ];

                goodix,cfg-group2 = [
                        5B B0 04 80 07 0A 35 10 22 08 32 0D 50 32 0A 04
                        01 01 00 B4 11 11 44 2B 31 36 28 95 35 FF 3E 40
                        39 13 00 00 00 DA 03 1C 00 00 00 00 03 00 00 00
                        00 80 0A 32 42 40 E5 52 23 28 00 04 7D 33 00 7D
                        36 00 7E 39 00 7F 3C 00 80 40 0C 80 00 50 33 50
                        0B 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                        00 00 00 00 00 00 00 55 00 01 00 00 02 00 00 00
                        1D 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E
                        0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 2A 29
                        28 27 26 25 24 23 22 21 20 1F 1E 1D 1C 1B 19 18
                        17 16 15 14 13 12 11 10 0F 0E 0D 0C 0B 0A 09 08
                        07 06 05 04 03 02 01 00 81 01
                ];
    };

Todo

后期根据需要考虑使用 v2.8 的驱动。直接使用 qcom 中的源码，或者使用 官方驱动。 https://github.com/goodix/gt9xx_driver_android
附件 gt9xx_driver_android-master.zip

参考

https://blog.csdn.net/qlexcel/article/details/99696108
https://forum.mangoh.io/t/i2c-nack-error-messages/3518
https://blog.csdn.net/mike8825/article/details/52057637
https://www.cnblogs.com/yejintianming00/p/9339754.html