diff options
Diffstat (limited to 'drivers/rtc/rtc-mv.c')
| -rw-r--r-- | drivers/rtc/rtc-mv.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index d536c5962c9..6aaec2fc7c0 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -222,6 +222,7 @@ static int __init mv_rtc_probe(struct platform_device *pdev) struct resource *res; struct rtc_plat_data *pdata; u32 rtc_time; + u32 rtc_date; int ret = 0; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); @@ -257,6 +258,17 @@ static int __init mv_rtc_probe(struct platform_device *pdev) } } + /* + * A date after January 19th, 2038 does not fit on 32 bits and + * will confuse the kernel and userspace. Reset to a sane date + * (January 1st, 2013) if we're after 2038. + */ + rtc_date = readl(pdata->ioaddr + RTC_DATE_REG_OFFS); + if (bcd2bin((rtc_date >> RTC_YEAR_OFFS) & 0xff) >= 38) { + dev_info(&pdev->dev, "invalid RTC date, resetting to January 1st, 2013\n"); + writel(0x130101, pdata->ioaddr + RTC_DATE_REG_OFFS); + } + pdata->irq = platform_get_irq(pdev, 0); platform_set_drvdata(pdev, pdata); @@ -307,7 +319,7 @@ static int __exit mv_rtc_remove(struct platform_device *pdev) } #ifdef CONFIG_OF -static struct of_device_id rtc_mv_of_match_table[] = { +static const struct of_device_id rtc_mv_of_match_table[] = { { .compatible = "marvell,orion-rtc", }, {} }; |