linux-3.4.2 s5pv210 Goodix-TS 移植

第一步：移植代码

从原理图可以看到，使用的事I2C0;

mach-smdkv210，添加i2c，

static struct i2c_board_info i2c_devs0[]__initdata = {

#ifdef      CONFIG_TOUCHSCREEN_GOODIX

       {

              I2C_BOARD_INFO("Goodix-TS",0x55),

       .irq = IRQ_EINT(4),

   },

#endif

第二步：

copy  linux-3.4.2/include/linux/goodix_queue.h和 goodix_touch.h

//copy            linux-3.4.2/include/config/touchscreen/goodix.h

copy     linux-3.4.2/drivers/input/touchscreen/goodix_touch.c

修改       linux-3.4.2/drivers/input/touchscreen/Makefile

       最后添加：

obj-$(CONFIG_TOUCHSCREEN_GOODIX)        += goodix_touch.o

修改       linux-3.4.2/drivers/input/touchscreen/Kconfig

config TOUCHSCREEN_GOODIX

       tristate "GOODIX based touchscreen"

       depends on I2C

       help

         It is a android driver to support Gooidx's touchscreen whose name

         is guitar on s5pv210 platform.The touchscreen can support multi-touch

         not more than two fingers.

         Say Y here to enable the driver for the touchscreen on the

         S5V SMDK board.

         If unsure, say N.To compile this driver as a module, choose M here:

         the module will be called goodix_touch.ko.

第三步：配置内核

第四步，编译报错

root@lj:/work/linux-3.4.2# make -j4 zImage

scripts/kconfig/conf --silentoldconfigKconfig

 CHK     include/linux/version.h

 CHK    include/generated/utsrelease.h

make[1]: “include/generated/mach-types.h”是最新的。

 CALL    scripts/checksyscalls.sh

 CHK    include/generated/compile.h

 CC     drivers/input/touchscreen/goodix_touch.o

drivers/input/touchscreen/goodix_touch.c:20:fatal error: linux/earlysuspend.h: No such file or directory

compilation terminated.

make[3]: ***[drivers/input/touchscreen/goodix_touch.o] 错误 1

make[2]: *** [drivers/input/touchscreen] 错误 2

make[1]: *** [drivers/input] 错误 2

make: *** [drivers] 错误 2

make: *** 正在等待未完成的任务....

因为这不是androidkernel报这个错误，在goodix_touch.c  20行和goodix_touch.h20行修改如下：

#ifdef CONFIG_HAS_EARLYSUSPEND

#include <linux/earlysuspend.h>

#endif

可以把和这个宏相关的都注释掉

在linux-3.4.2/arch/arm/mach-s5pv210/include/mach/gpio.h添加

#define S5P_EXT_INT0(x)          S5PV210_GPH0(x)

#define S5P_EXT_INT1(x)          S5PV210_GPH1(x)

#define S5P_EXT_INT2(x)          S5PV210_GPH2(x)

#define S5P_EXT_INT3(x)          S5PV210_GPH3(x)

第五步，编译测试

移植成功，通过修改对应的宏GOODIX_MULTI_TOUCH，可以设置单点和多点触控。

在goodix_touch.c中函数goodix_ts_work_func加log可以看到tsp的触摸信息