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 " "); 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); ======================================
作者：hclydao
http://blog.csdn.net/hclydao
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