demo.c

#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>struct device_node* node;
struct property* property;
/*
mynode@0x12345678{ //mynode节点名字mystring = "hello DC24031";//字符串属性myint = <0x12 0x34 0xabcd>;//无符号32位整数列表mybin = [01 02 03 04];//二进制列表myhex = "hello huyue",<0x12ab>,[1a 2b 3c];//混合键值对信息
};  
*///入口
static int __init demo_init(void)
{int i = 0;int len;//通过路径解析节点结构体指针node = of_find_node_by_path("/mynode@0x12345678");if(node == NULL){printk("of find node by path is error\n");return -EIO;}//通过解析属性API接口property = of_find_property(node,"mystring",&len);//解析mystring属性printk("key = %s value = %s\n",property->name,(char*)(property->value));//通过解析属性API接口property = of_find_property(node,"myint",&len);//解析无符号32位整数列表 完成大小端的转换printk("key = %s value = %#x\n",property->name,__be32_to_cpup(property->value));printk("key = %s value = %#x\n",property->name,__be32_to_cpup(property->value+4));printk("key = %s value = %#x\n",property->name,__be32_to_cpup(property->value+8));//通过解析属性API接口property = of_find_property(node,"mybin",&len);//解析二进制列表for(i=0;i<4;i++){printk("key = %s value = %#x\n",property->name,*(unsigned char*)(property->value + i));}//通过解析属性API接口property = of_find_property(node,"myhex",&len);//解析混合键值对信息printk("key = %s value = %s\n",property->name,(char*)(property->value));    printk("key = %s value = %#x\n",property->name,__be32_to_cpup(property->value + 12));   printk("key = %s value = %#x\n",property->name,*(unsigned char*)(property->value + 16));   printk("key = %s value = %#x\n",property->name,*(unsigned char*)(property->value + 17));printk("key = %s value = %#x\n",property->name,*(unsigned char*)(property->value + 18));return 0;
}//出口
static void __exit demo_exit(void)
{}module_init(demo_init); //指定入口地址
module_exit(demo_exit); //指定出口地址
MODULE_LICENSE("GPL"); //遵循GPL协议