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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-18 15:56:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-18 15:56:25 -0700
commit73f1f5dd3ee3ec6e20768d831d9759b0330fad0e (patch)
tree22f8498c47467f468dce6c3bca0eb1f3a0c9ade0 /drivers
parent30a08bf2d31d275c6fc71dd1811342777e95c831 (diff)
parent93c2d656c7120e29de8df5bc17bb2a97664104e9 (diff)
downloadlinux-linaro-stable-73f1f5dd3ee3ec6e20768d831d9759b0330fad0e.tar.gz
Merge branch 'akpm' (Andrew's patch-bomb)
Merge misc fixes from Andrew Morton. * emailed from Andrew Morton <akpm@linux-foundation.org>: (4 patches) frv: delete incorrect task prototypes causing compile fail slub: missing test for partial pages flush work in flush_all() fs, proc: fix ABBA deadlock in case of execution attempt of map_files/ entries drivers/rtc/rtc-pl031.c: configure correct wday for 2000-01-01
Diffstat (limited to 'drivers')
-rw-r--r--drivers/rtc/rtc-pl031.c18
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)) {