Touch Screen

chip's full name is AT42QT602240 or ATMXT224:

 

 

AMRI5000:

 

1. add config item in kernel/arch/arm/configs/msm7627-perf_defconfig
 CONFIG_TOUCHSCREEN_AMRI5000=y

2. in board-msm7x27.c

 2.1 in i2c_devices[], add
  I2C_BOARD_INFO("amri5000", 0x5C)

 2.2 in platform_device *devices[],add
  &msm_device_tssc_amri5000,

3. in devices-msm7x27.c
static struct resource resource_cap_tssc[]={
 {
  .start =MSM_GPIO_TO_INT(21), //INT_GPIO_GROUP2,
  .end =MSM_GPIO_TO_INT(21),
  .name ="cap_tssc_irq",
  .flags =IORESOURCE_IRQ,
 },
};

struct platform_device msm_device_tssc_amri5000={
 .name="msm_touchscreen_amri5000",
 .id=0,
 .num_resources=ARRAY_SIZE(resource_cap_tssc),
 .resource=resource_cap_tssc,
};

4. in kernel/arch/arm/mach-msm/devices.h
extern struct platform_device msm_device_tssc_amri5000;

5. /kernel/drivers/input/touchscreen/Kconfig
+config TOUCHSCREEN_amri5000
+ default n
+ tristate "MSM Touchscreen amri5000"
+ depends on ARCH_MSM && !ARCH_MSM7X30
+ help
+   Say Y here if you have a touchscreen interface using MSM
+   touchscreen controller.
+
+   To compile this driver as a module, choose M here: the
+   module will be called msm_touch_amri5000.
+

6. /kernel/drivers/input/touchscreen/Makefile
obj-$(CONFIG_TOUCHSCREEN_AMRI5000)  += msm_touch_amri5000.o

7. new file: /kernel/drivers/input/touchscreen/msm_touch_amri5000.c