/sys/devices/platform/qc_gpio/acc_detect

diff --git a/drivers/misc/qc_gpio.c b/drivers/misc/qc_gpio.c
index e1d0b1a..df9afed 100644
--- a/drivers/misc/qc_gpio.c
+++ b/drivers/misc/qc_gpio.c
@@ -143,14 +143,6 @@ static ssize_t qc_gpio_write(struct file *file, const char __user *buffer,
 		}
 	}
 
-
-	if(gpio_get_value(acc_detect_gpio) ==  CARREVERSE_GPIO_ACTIVE)//檢測到ACC打火
-		new_detect_status |= ACC_DETECT_MASK;
-	else
-		new_detect_status &= ~ACC_DETECT_MASK; //ACC 關火
-
-
-	
 	if(new_detect_status != detect_status)
 	{
 		detect_status = new_detect_status;
@@ -209,16 +201,31 @@ static const struct file_operations qc_gpio_fops = {
 	.llseek		= no_llseek,
 	.unlocked_ioctl = qc_gpio_ioctl,
 };
+	
+ static ssize_t show_acc_detect(struct device *dev, struct device_attribute *attr,char *buf) {
+		return sprintf(buf, "%u\n", (gpio_get_value(acc_detect_gpio)==1)?0:1);
+	 }
+	 
+ static DEVICE_ATTR(acc_detect, S_IRUGO | S_IWUSR, show_acc_detect,NULL);
+	
+ static struct attribute *qcdev_attrs[] = {
+				&dev_attr_acc_detect.attr,
+				NULL,
+	 };
+static struct attribute_group qcdev_attr_grp = {
+			   .attrs = qcdev_attrs,
+ };
+				
 
 static irqreturn_t acc_detect_irq_handler(int irq, void *data)
 {
 	if(acc_detect_status){
-		acc_detect_status = 0;//關機/休眠前關 acc_en
+		acc_detect_status = 0;//enable acc_en
 		//gpio_direction_output(sys_pwren_gpio, 0);
 		gpio_direction_output(acc_en_gpio, 0);
 		}
 	else{
-		acc_detect_status = 1;//開機/喚醒前開 acc_en
+		acc_detect_status = 1;//enable acc_en
 		//gpio_direction_output(sys_pwren_gpio, 1);
 		gpio_direction_output(acc_en_gpio, 1);
 	}
@@ -361,6 +368,13 @@ static int qc_gpio_probe(struct platform_device *pdev)
 		 goto IRQ_ERR;
 	}
 
+
+    result=sysfs_create_group(&pdev->dev.kobj,&qcdev_attr_grp);
+	  if (result != 0) {
+		  printk( "Failed to create xxx sysfs files: %d\n", result);
+		  return result;
+	  }
+
 	//acc_detect_request_irq(pdev);
 	return 0;

--------------------- 
作者：阿贊88 
來源：CSDN 
原文：https://blog.csdn.net/touxiong/article/details/83344111
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