gt9x双击唤醒屏幕

出现I2C通信失败问题

里面可以看到irq 和 rst的gpio引脚从设备树获取失败，导致无法按照手册规定初始化上电时序设置I2C地址(GT的触摸芯片是通过初始时序来决定I2C地址)，排查设备树发现是GPIO属性名写错了：

修改之后如下：

&i2c1 {
	status = "okay";
	goodix_ts@5d {
		compatible = "goodix,gt9xx";
		reg = <0x5d>;
		// tp-size = <89>;
		touchscreen-size-x = <1280>;
		touchscreen-size-y = <800>;
		// pinctrl-0 = <&touch_gpio>;
		irq-gpios = <&gpio1 RK_PA0 IRQ_TYPE_LEVEL_LOW>;
		reset-gpios	= <&gpio1 RK_PA1 GPIO_ACTIVE_LOW>;
		irq-flags = <2>;
		goodix,slide-wakeup = <1>;//滑动唤醒
		goodix,resume-in-workqueue = <0>;
		goodix,int-sync = <1>;
		goodix,swap-x2y = <1>;//x2y
		goodix,revert_x = <1>;//x轴转换
		goodix,revert_y = <0>;//y轴转换
	};

};

除了上面的一些属性外，还有其他可以选择的属性，比如，触摸屏幕上面的按键可以用，touchscreen-key-map=<172>,<158>,<139>来设置主页，返回，菜单三个按键

驱动补丁(使用的是2.8版本)：

//自定义双击唤醒
#ifdef my_WAKE
static int my_gesture_handler(struct goodix_ts_data *ts)
{
	u8 point_state = 0;
	u8 key_value = 0;
	s32 i = 0;
	u16 cur_touch = 0;
	static u16 pre_touch;
	static struct timespec64 start;
	struct timespec64 end;
	__kernel_time64_t sec;

	struct goodix_point_t spoints[GTP_MAX_TOUCH_ID];
	struct goodix_point_t *points = spoints;
	point_state = gtp_get_points(ts, points, &key_value);
	point_state = point_state & 0x0f;//函数获取当前触摸点状态和按键值，并且只保留低4位的触摸点状态

	for (i = 0; i < ts->pdata->max_touch_id; i++) 
    {
        //遍历当前的触摸ID，如果当前触摸点状态中有相应的ID，则设置cur_touch相应的位
		if (point_state && i == points->id) {
			cur_touch |= 0x01 << points->id;
			points++;
		}
        //如果前一次触摸状态中有相应的ID，则根据wake_count处理不同的逻辑，记录时间并判断是否超时
        else if (pre_touch & 0x01 << i) 
        {
			if(ts->wake_count == 0) //第一次按下，开始记录时间
            {
				ktime_get_real_ts64(&start);
			} 
            else if (ts->wake_count == 1) 
            {
				ktime_get_real_ts64(&end);	
				sec = end.tv_sec - start.tv_sec;
				if(sec > my_WAKE_TIMEOUT) 
                {
					ts->wake_count = 0;
					ktime_get_real_ts64(&start);
					dev_err(&ts->client->dev, "new wake sec=%ld",sec);
				}
			}	
			ts->wake_count++;											
		}
	}

	pre_touch = cur_touch;//更新前一次触摸状态

	if(ts->wake_count > 1 )//第二次按下，结束记录时间	
    { 
		ktime_get_real_ts64(&end);	
		sec = end.tv_sec - start.tv_sec;
		if(sec > my_WAKE_TIMEOUT) //如果两次记录时间超过my_WAKE_TIMEOUT，则认为无效，从新开始
        {
			ts->wake_count = 0;
			dev_err(&ts->client->dev, "timeout sec=%ld",sec);
			return 0;
		}
		doze_status = DOZE_WAKEUP;//设置标志为唤醒
		dev_err(&ts->client->dev, "KEY_POWER wake_count=%d sec=%ld",ts->wake_count,sec);

//上报电源按键事件，唤醒
		input_report_key(ts->input_dev, KEY_POWER, 1);
		input_sync(ts->input_dev);
		input_report_key(ts->input_dev, KEY_POWER, 0);
		input_sync(ts->input_dev);
		ts->wake_count = 0;
	}
	return 0;
}
+
+static int my_enter_doze(struct goodix_ts_data *ts)
+{
+	int ret = 0;
+	set_bit(DOZE_MODE, &ts->flags);
+	dev_dbg(&ts->client->dev, "Entering gesture mode.");
+	return ret;
+}
+
+static int my_gesture_wakeup(struct goodix_ts_data *ts)
+{
+	int ret = 0;
+	clear_bit(DOZE_MODE, &ts->flags);
+	return ret;
+}
+

 /*
  * return touch state register value
  * pen event id fixed with 9 and set tool type TOOL_PEN
@@ -575,7 +659,11 @@ static void gtp_work_func(struct goodix_ts_data *ts)
 
 	/* gesture event */
 	if (ts->pdata->slide_wakeup && test_bit(DOZE_MODE, &ts->flags)) {
+		#ifdef my_WAKE
+		ret = my_gesture_handler(ts);
+		#else
 		ret =  gtp_gesture_handler(ts);
+		#endif	
 		if (ret)
 			dev_err(&ts->client->dev,
 				"Failed handler gesture event %d\n", ret);
@@ -827,6 +915,8 @@ void gtp_reset_guitar(struct i2c_client *client, s32 ms)
 	clear_bit(PANEL_RESETTING, &ts->flags);
 }


 static s8 gtp_enter_sleep(struct goodix_ts_data *ts)
 {
@@ -2090,7 +2181,9 @@ static int gtp_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		devm_kfree(&client->dev, ts);
 		return -EINVAL;
 	}
-
+#ifdef my_WAKE
+	ts->wake_count = 0;
+#endif	
 	ts->init_done = false;
 
 #ifdef CONFIG_OF
@@ -2318,7 +2411,11 @@ static void gtp_suspend(struct goodix_ts_data *ts)
 	gtp_esd_off(ts);
 	gtp_work_control_enable(ts, false);
 	if (ts->pdata->slide_wakeup) {
+	#ifdef my_WAKE	
+		ret = my_enter_doze(ts);
+	#else
 		ret = gtp_enter_doze(ts);
+    #endif
 		gtp_work_control_enable(ts, true);
 	} else if (ts->pdata->power_off_sleep) {
 		/*TODO: power off routine */
@@ -2336,6 +2433,7 @@ static void gtp_suspend(struct goodix_ts_data *ts)
 	msleep(GTP_58_DLY_MS);
 }