diff options
Diffstat (limited to 'drivers/rtc/rtc-r9701.c')
| -rw-r--r-- | drivers/rtc/rtc-r9701.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c index 2853c2a6f10f..33b6ba0afa0d 100644 --- a/drivers/rtc/rtc-r9701.c +++ b/drivers/rtc/rtc-r9701.c @@ -122,6 +122,7 @@ static const struct rtc_class_ops r9701_rtc_ops = { static int __devinit r9701_probe(struct spi_device *spi) { struct rtc_device *rtc; + struct rtc_time dt; unsigned char tmp; int res; @@ -132,6 +133,27 @@ static int __devinit r9701_probe(struct spi_device *spi) return -ENODEV; } + /* + * The device seems to be present. Now check if the registers + * contain invalid values. If so, try to write a default date: + * 2000/1/1 00:00:00 + */ + r9701_get_datetime(&spi->dev, &dt); + if (rtc_valid_tm(&dt)) { + dev_info(&spi->dev, "trying to repair invalid date/time\n"); + dt.tm_sec = 0; + dt.tm_min = 0; + dt.tm_hour = 0; + dt.tm_mday = 1; + dt.tm_mon = 0; + dt.tm_year = 100; + + if (r9701_set_datetime(&spi->dev, &dt)) { + dev_err(&spi->dev, "cannot repair RTC register\n"); + return -ENODEV; + } + } + rtc = rtc_device_register("r9701", &spi->dev, &r9701_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) @@ -159,17 +181,7 @@ static struct spi_driver r9701_driver = { .remove = __devexit_p(r9701_remove), }; -static __init int r9701_init(void) -{ - return spi_register_driver(&r9701_driver); -} -module_init(r9701_init); - -static __exit void r9701_exit(void) -{ - spi_unregister_driver(&r9701_driver); -} -module_exit(r9701_exit); +module_spi_driver(r9701_driver); MODULE_DESCRIPTION("r9701 spi RTC driver"); MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); |