LDD3 设备驱动－lddbus

摘自：http://blog.csdn.net/makethyme/article/details/7193782

1. struct device不再包含bus_id,取而代之的是.init_name，修改ldd_bus

struct device ldd_bus = {
      .init_name = "ldd0",
      .release = ldd_bus_release

修改函数register_ldd_device如下：
   strncpy(ldddev->dev.bus_id, ldddev->name, BUS_ID_SIZE);
替换为：
   ldddev->dev.init_name = ldddev->name;    
  或
　dev_set_name(&ldddev->dev.init_name,ldddev->name);　

修改函数ldd_match如下：
   return !(strncmp(dev->bus_id, driver->name, strlen(driver->name));
修改为
   return !strncmp(dev->init_name, driver->name, strlen(driver->name));

2. 结构体struct bus_type已经改变，不再包含hotplug，取而代之的是uevent，故修改
结构体ldd_bus_type如下：

struct bus_type ldd_bus_type = {
        .name = "ldd",
        .match = ldd_match,
        .uevent = ldd_uevent,
};

而原来的函数ldd_hotplug用ldd_event来取代如下：

static int ldd_uevent(struct device *dev, struct kobj_uevent_env *env) {
    env->envp[0] = evn->buf;
    if (snprintf(env->buf, env->buflen, "LDDBUS_VERSION=%s", Version) >= env->buflen)
       return -ENOMEM;
   env->envp[1] = NULL;
   return 0;
}