Update to 3.4-final.

[linux-flexiantxendom0-3.2.10.git] / drivers / rtc / rtc-pl031.c

diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index ff1b84b..f027c06 100644 (file)
--- 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)
@@ -339,11 +340,27 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
        dev_dbg(&adev->dev, "revision = 0x%01x\n", ldata->hw_revision);
 
        /* Enable the clockwatch on ST Variants */
-       if ((ldata->hw_designer == AMBA_VENDOR_ST) &&
-           (ldata->hw_revision > 1))
+       if (ldata->hw_designer == AMBA_VENDOR_ST)
                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)) {
@@ -352,7 +369,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
        }
 
        if (request_irq(adev->irq[0], pl031_interrupt,
-                       IRQF_DISABLED, "rtc-pl031", ldata)) {
+                       0, "rtc-pl031", ldata)) {
                ret = -EIO;
                goto out_no_irq;
        }
@@ -420,6 +437,8 @@ static struct amba_id pl031_ids[] = {
        {0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, pl031_ids);
+
 static struct amba_driver pl031_driver = {
        .drv = {
                .name = "rtc-pl031",
@@ -429,18 +448,7 @@ static struct amba_driver pl031_driver = {
        .remove = pl031_remove,
 };
 
-static int __init pl031_init(void)
-{
-       return amba_driver_register(&pl031_driver);
-}
-
-static void __exit pl031_exit(void)
-{
-       amba_driver_unregister(&pl031_driver);
-}
-
-module_init(pl031_init);
-module_exit(pl031_exit);
+module_amba_driver(pl031_driver);
 
 MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net");
 MODULE_DESCRIPTION("ARM AMBA PL031 RTC Driver");