Android4.4 pcf8563无法保存设置时间的问题

曾经终败给现在 2022-06-02 11:09 248阅读 0赞

Android4.4 使用外部rtc pcf8563无法保存设置时间的问题需要对原有驱动进行如下修改

首先在struct rtc\_class\_ops中增加set\_alarm接口如下:

static const struct rtc_class_ops pcf8563_rtc_ops = {
    	.read_time	= pcf8563_rtc_read_time,
    	.set_time	= pcf8563_rtc_set_time,
    	.set_alarm	= pcf8563_rtc_set_alarm,//add by hclydao
    };

具体函数实现如下:

static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
    {
    	struct rtc_time *tm = &alrm->time;
    	return pcf8563_set_datetime(to_i2c_client(dev), tm);
    }

Android4.4以后是使用rtc驱动中的set\_alarm进行设置时间,所以需要增加上面的接口.

同时在probe函数中增加唤醒的设置，部分代码如下

dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
    
    	i2c_set_clientdata(client, pcf8563);
    
    	/* cpu init code should really have flagged this device as
    	 * being wake-capable; if it didn't, do that here.
    	 */
    	if (!device_can_wakeup(&client->dev)) { //add by hclydao
    		device_init_wakeup(&client->dev, 1);
    	}
    
    	pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name,
    				&client->dev, &pcf8563_rtc_ops, THIS_MODULE);

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作者：hclydao  
[http://blog.csdn.net/hclydao][http_blog.csdn.net_hclydao]  
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