platform_driver_register2种方式学习

1.platform_device_register与platform_driver_register配合使用: 

实例代码摘自下述网址:

这样当两个name一样时,就会嗲用mt65xx_leds_probe这个函数了。

static struct platform_driver mt65xx_leds_driver = {  
    .driver = {  
           .name = "leds-mt65xx",  
           .owner = THIS_MODULE,  
           },  
    .probe = mt65xx_leds_probe,  
    .remove = mt65xx_leds_remove,  
};  
static struct platform_device mt65xx_leds_device = {  
    .name = "leds-mt65xx",  
    .id = -1  
};  
static int __init mt65xx_leds_init(void)  
{     
    platform_device_register(&mt65xx_leds_device);  
    platform_driver_register(&mt65xx_leds_driver);  
}  

  

 

2.platform_driver_register与dts配合使用,用compatable name,在c code里面配置compatible name,在dts中配置同样的name,就能probe了。

static const struct of_device_id mtkfb_of_ids[] = {  
    {.compatible = "mediatek,mtkfb",},  
    {}  
};  
static struct platform_driver mtkfb_driver = {  
    .driver = {  
        .name = MTKFB_DRIVER,  
        .probe = mtkfb_probe,  
        .of_match_table = mtkfb_of_ids,  
    },  
};  
int __init mtkfb_init(void)  
{  
    int r = 0;  
    platform_driver_register(&mtkfb_driver);  
}  

  

https://blog.csdn.net/qianjin2531/article/details/78109825 

probe是否启动与硬件关系:

Vibr为啥会probe起来:只要platform_driver_register与platform_device_register的Name一样,就会probe,所以probe这个函数起起来,与硬件是否存在无关,硬件是否存在,可以在Probe中用一些摸硬件的方法,看其返回值来判断,比如i2c读取设备号是否有返回呀等等。

posted on 2018-05-17 19:18  snowdrop  阅读(1314)  评论(0编辑  收藏  举报