diff options
| author | David S. Miller <davem@davemloft.net> | 2012-05-20 21:53:04 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-20 21:53:04 -0400 |
| commit | 17eea0df5f7068fc04959e655ef8f0a0ed097e19 (patch) | |
| tree | d44b5cceb813dddfd1e62fe9f92556cf113d62fd /drivers/rtc | |
| parent | 9b905fe68433378032b851c4d81a59187689fa52 (diff) | |
| parent | 76e10d158efb6d4516018846f60c2ab5501900bc (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-pl031.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index 684ef4bbfce4..f027c063fb20 100644 --- a/drivers/rtc/rtc-pl031.c +++ b/drivers/rtc/rtc-pl031.c @@ -312,6 +312,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id) int ret; struct pl031_local *ldata; struct rtc_class_ops *ops = id->data; + unsigned long time; ret = amba_request_regions(adev, NULL); if (ret) @@ -343,6 +344,23 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id) writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN, ldata->base + RTC_CR); + /* + * On ST PL031 variants, the RTC reset value does not provide correct + * weekday for 2000-01-01. Correct the erroneous sunday to saturday. + */ + if (ldata->hw_designer == AMBA_VENDOR_ST) { + if (readl(ldata->base + RTC_YDR) == 0x2000) { + time = readl(ldata->base + RTC_DR); + if ((time & + (RTC_MON_MASK | RTC_MDAY_MASK | RTC_WDAY_MASK)) + == 0x02120000) { + time = time | (0x7 << RTC_WDAY_SHIFT); + writel(0x2000, ldata->base + RTC_YLR); + writel(time, ldata->base + RTC_LR); + } + } + } + ldata->rtc = rtc_device_register("pl031", &adev->dev, ops, THIS_MODULE); if (IS_ERR(ldata->rtc)) { |