diff options
Diffstat (limited to 'drivers/rtc')
-rw-r--r-- | drivers/rtc/Kconfig | 2 | ||||
-rw-r--r-- | drivers/rtc/rtc-pl031.c | 18 |
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 8c8377d..4161bfe 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -838,7 +838,7 @@ config RTC_DRV_AT32AP700X config RTC_DRV_AT91RM9200 tristate "AT91RM9200 or some AT91SAM9 RTC" - depends on ARCH_AT91RM9200 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45 + depends on ARCH_AT91 help Driver for the internal RTC (Realtime Clock) module found on Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c index 684ef4b..f027c06 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)) { |