RK Android7.1 移植gt9271 TP偏移

 

一.原理图

 dts 配置

	  goodix@14 {
              compatible = "goodix,gt9xx";
              reg = <0x14>;
              max-x = <1280>;
              max-y = <800>;
              tp-size= <89>;
              touch-gpio = <&gpio0 4 IRQ_TYPE_LEVEL_LOW>;
              rst-gpio = <&gpio0 3 GPIO_ACTIVE_HIGH>;　　

 通信失败

[    1.661711] <<-GTP-ERROR->> GTP i2c test failed time 4.
[    1.675859] <<-GTP-ERROR->> I2C Read: 0x8047, 1 bytes failed, errcode: -6! Process reset.
[    1.758372] <<-GTP-ERROR->> GTP i2c test failed time 5.
[    1.771698] <goodix_ts_probe>_2555    I2C communication ERROR!
[    1.771717]    <goodix_ts_probe>_2623  prob error !!!!!!!!!!!!!!!
[    1.771787] rk3x-i2c ff3d0000.i2c: Initialized RK3xxx I2C bus at ffffff80099d4000

 

linux i2c 的通信函数i2c_transfer出错码

参考errno－base.h

#define EPERM 1 /* Operation not permitted */

#define ENOENT 2 /* No such file or directory */

#define ESRCH 3 /* No such process */

#define EINTR 4 /* Interrupted system call */

#define EIO 5 /* I/O error */

#define ENXIO 6 /* No such device or address */

#define E2BIG 7 /* Argument list too long */

#define ENOEXEC 8 /* Exec format error */

#define EBADF 9 /* Bad file number */

#define ECHILD 10 /* No child processes */

#define EAGAIN 11 /* Try again */

#define ENOMEM 12 /* Out of memory */

#define EACCES 13 /* Permission denied */

#define EFAULT 14 /* Bad address */

#define ENOTBLK 15 /* Block device required */

正常　

[    1.298163] tp 00000000000000000000000000000 DPT
[    1.298163]
[    1.335636] input: goodix-ts as /devices/virtual/input/input1

三.kernel\drivers\input\touchscreen\GT9271\gt9xx.c

/*******************************************************
Function:
    I2c probe.
Input:
    client: i2c device struct.
    id: device id.
Output:
    Executive outcomes. 
        0: succeed.
*******************************************************/
static int goodix_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
    s32 ret = -1;
    struct goodix_ts_data *ts;
    u16 version_info;
    
    struct device_node *np = client->dev.of_node;
    enum of_gpio_flags rst_flags, pwr_flags, tp_select_flags;
    unsigned long irq_flags;
    u32 val;
	printk("___%s() start____ \n", __func__);

    
    GTP_DEBUG_FUNC();
    
    //do NOT remove these logs
    GTP_INFO("GTP Driver Version: %s", GTP_DRIVER_VERSION);
    GTP_INFO("GTP Driver Built@%s, %s", __TIME__, __DATE__);
    GTP_INFO("GTP I2C Address: 0x%02x", client->addr);

    i2c_connect_client = client;
    
    if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) 
    {
        GTP_ERROR("I2C check functionality failed.");
        return -ENODEV;
    }
    ts = kzalloc(sizeof(*ts), GFP_KERNEL);
    if (ts == NULL)
    {
        GTP_ERROR("Alloc GFP_KERNEL memory failed.");
        return -ENOMEM;
    }
    
    memset(ts, 0, sizeof(*ts));
    
    if (!np) {
    	dev_err(&client->dev, "no device tree\n");
    	return -EINVAL;
    }
    if (of_property_read_u32(np, "tp-size", &val)) {
    	dev_err(&client->dev, "no max-x defined\n");
    	return -EINVAL;
    }
    if(val == 89){
        m89or101 = TRUE;
        mGtpChange_X2Y = TRUE;
        mGtp_X_Reverse = FALSE;
        mGtp_Y_Reverse = FALSE;
    }else if(val == 101){
        m89or101 = TRUE;
        mGtpChange_X2Y = FALSE;
        mGtp_X_Reverse = FALSE;
        mGtp_Y_Reverse = FALSE;
    }
    ts->irq_pin = of_get_named_gpio_flags(np, "touch-gpio", 0, (enum of_gpio_flags *)(&ts->irq_flags));
    ts->rst_pin = of_get_named_gpio_flags(np, "reset-gpio", 0, &rst_flags);
    ts->pwr_pin = of_get_named_gpio_flags(np, "power-gpio", 0, &pwr_flags);
    ts->tp_select_pin = of_get_named_gpio_flags(np, "tp-select-gpio", 0, &tp_select_flags);
    if (of_property_read_u32(np, "max-x", &val)) {
    	dev_err(&client->dev, "no max-x defined\n");
    	return -EINVAL;
    }
    //ts->abs_x_max = val;
    if (of_property_read_u32(np, "max-y", &val)) {
    	dev_err(&client->dev, "no max-y defined\n");
    	return -EINVAL;
    }
    //ts->abs_y_max = val;
    ts->pendown =PEN_RELEASE;
    ts->client = client;
    
    
    INIT_WORK(&ts->work, goodix_ts_work_func);
    ts->client = client;
    spin_lock_init(&ts->irq_lock);          // 2.6.39 later
    // ts->irq_lock = SPIN_LOCK_UNLOCKED;   // 2.6.39 & before
#if GTP_ESD_PROTECT
    ts->clk_tick_cnt = 2 * HZ;      // HZ: clock ticks in 1 second generated by system
    GTP_DEBUG("Clock ticks for an esd cycle: %d", ts->clk_tick_cnt);  
    spin_lock_init(&ts->esd_lock);
    // ts->esd_lock = SPIN_LOCK_UNLOCKED;
#endif
    i2c_set_clientdata(client, ts);
    
    ts->gtp_rawdiff_mode = 0;

    ret = gtp_request_io_port(ts);
    if (ret < 0)
    {
        GTP_ERROR("GTP request IO port failed.");
        //return ret;
        goto probe_init_error_requireio;
    }

    if(gpio_get_value(ts->tp_select_pin))//WGJ
    {
    	printk("tp 11111111111111111111111111111 WGJ\n\n");
    	mGtp_X_Reverse = FALSE;
    	mGtp_Y_Reverse = FALSE;
    }
    else//DPT
    {
    	printk("tp 00000000000000000000000000000 DPT\n\n");
    	mGtpChange_X2Y = TRUE;
    	mGtp_X_Reverse = TRUE;//FALSE;
    	mGtp_Y_Reverse = FALSE;
    }

mGtpChange_X2Y = TRUE;
mGtp_X_Reverse = TRUE;  X镜像
mGtp_Y_Reverse = FALSE;  Y镜像

/*******************************************************
Function:
    Report touch point event 
Input:
    ts: goodix i2c_client private data
    id: trackId
    x:  input x coordinate
    y:  input y coordinate
    w:  input pressure
Output:
    None.
*********************************************************/
static void gtp_touch_down(struct goodix_ts_data* ts,s32 id,s32 x,s32 y,s32 w)
{
    if(mGtpChange_X2Y){
        GTP_SWAP(x, y);
    }

    if(mGtp_X_Reverse){
        x = ts->abs_x_max - x;
    }

    if(mGtp_Y_Reverse){
        y = ts->abs_y_max - y;
    }