關于SPI驅動注冊中，設備節(jié)點的問題，請高手解答

l289123557

1. static int __init spidev_init(void)
   
2. {
   
3.         int status;
   
4. 
   
5.         /* Claim our 256 reserved device numbers.  Then register a class
   
6.          * that will key udev/mdev to add/remove /dev nodes.  Last, register
   
7.          * the driver which manages those device numbers.
   
8.          */
   
9.         BUILD_BUG_ON(N_SPI_MINORS > 256);
   
10.         status = register_chrdev(SPIDEV_MAJOR, "spi", &spidev_fops);
    
11.         if (status < 0)
    
12.                 return status;
    
13. 
    
14.         spidev_class = class_create(THIS_MODULE, "spidev");
    
15.         if (IS_ERR(spidev_class)) {
    
16.                 unregister_chrdev(SPIDEV_MAJOR, spidev_spi.driver.name);
    
17.                 return PTR_ERR(spidev_class);
    
18.         }
    
19. 
    
20.         status = spi_register_driver(&spidev_spi);
    
21.         if (status < 0) {
    
22.                 class_destroy(spidev_class);
    
23.                 unregister_chrdev(SPIDEV_MAJOR, spidev_spi.driver.name);
    
24.         }
    
25.         return status;
    
26. }

復制代碼

上面是spidev.c中的代碼，我想問的是這段代碼中，有兩個注冊函數(shù) register_chrdev和spi_register_driver
，那是不是會創(chuàng)建兩個設備節(jié)點啊