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rtc: hym8563: check power down tag

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hxy
2011-01-05 20:05:23 +08:00
parent 29eb326bc7
commit 73f727e81b
1 changed files with 9 additions and 0 deletions
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9
drivers/rtc/rtc-HYM8563.c
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@@ -323,6 +323,7 @@ static const struct rtc_class_ops hym8563_rtc_ops = {
static int __devinit hym8563_probe(struct i2c_client *client,const struct i2c_device_id *id)
{
int rc = 0;
u8 reg = 0;
struct hym8563 *hym8563;
struct rtc_device *rtc = NULL;
struct rtc_time tm_read, tm = {
@@ -352,6 +353,14 @@ static int __devinit hym8563_probe(struct i2c_client *client,const struct i2c_d
}
hym8563->client = client;
hym8563_init_device(client);
// check power down
hym8563_i2c_read_regs(client,RTC_SEC,&reg,1);
if (reg&0x80) {
dev_info(&client->dev, "clock/calendar information is no longer guaranteed\n");
hym8563_set_time(client, &tm);
}
hym8563_read_datetime(client, &tm_read); //read time from hym8563
if(((tm_read.tm_year < 70) | (tm_read.tm_year > 137 )) | (tm_read.tm_mon == -1) | (rtc_valid_tm(&tm_read) != 0)) //if the hym8563 haven't initialized