RK Android7.1 移植gt9271 TP偏移

 

一.原理图

 dts 配置

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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

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[    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　

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[    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

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/******************************************************* 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

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/******************************************************* 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;     }