驱动中获取设备树节点信息

#include 
#include 
#include 
/*mynode@0x12345678{
    compatible = "hqyj,mynode";
    astring="hello 22071";
    uint  =<0xaabbccdd 0x11223344>;
    binarry=[00 0c 27b9  f9 be];
    mixed ="hello",[11 22],<0x12345678>;
 };*/
 
//定义指针指向获取的设备树节点信息空间
 struct device_node *node;
 struct property *pr;
 int len,i;
static int __init mycdev_init(void)
{
	printk("aaaa\n");
    //通过路径获取设备树节点信息
    node=of_find_node_by_path("/mynode@0x12345678");
    if(node==NULL)
    {
        printk("通过路径解析设备树节点失败\n");
        return -EFAULT;
    }
    printk("成功解析到设备树节点\n");
    //通过属性解析函数获取指定名字的属性信息
    //解析字符串
    pr=of_find_property(node,"astring",&len);
    if(pr==NULL)
    {
        printk("属性解析失败\n");
        return  -EFAULT;
    }
    printk("name=%s,value=%s\n",pr->name,(char *)pr->value);
    //解析单字节属性
    pr=of_find_property(node,"binarry",&len);
    if(pr==NULL)
    {
        printk("属性解析失败\n");
        return  -EFAULT;
    }
    //循环遍历单字节属性数值
    for(i=0;i
    printk("name=%s value=%#x\n",pr->name,*((char *)pr->value+i));
   return 0;
}
static void __exit mycdev_exit(void)
{
 
 
}
module_init(mycdev_init);
module_exit(mycdev_exit);
MODULE_LICENSE("GPL");