rtc: pl031: use per-vendor variables for special init

Instead of hard-checking for certain vendor codes, follow the pattern of
other AMBA (PrimeCell) drivers and use variables in the vendor data.
Get rid of the locally cached vendor and hardware revision since we
already have the nice vendor data variable in the state.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-pl031.c

@@ -71,17 +71,21 @@
 /**
  * struct pl031_vendor_data - per-vendor variations
  * @ops: the vendor-specific operations used on this silicon version
+ * @clockwatch: if this is an ST Microelectronics silicon version with a
+ *	clockwatch function
+ * @st_weekday: if this is an ST Microelectronics silicon version that need
+ *	the weekday fix
  */
 struct pl031_vendor_data {
 	struct rtc_class_ops ops;
+	bool clockwatch;
+	bool st_weekday;
 };
 
 struct pl031_local {
 	struct pl031_vendor_data *vendor;
 	struct rtc_device *rtc;
 	void __iomem *base;
-	u8 hw_designer;
-	u8 hw_revision:4;
 };
 
 static int pl031_alarm_irq_enable(struct device *dev,
@@ -336,14 +340,11 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 
 	amba_set_drvdata(adev, ldata);
 
-	ldata->hw_designer = amba_manf(adev);
-	ldata->hw_revision = amba_rev(adev);
-
-	dev_dbg(&adev->dev, "designer ID = 0x%02x\n", ldata->hw_designer);
-	dev_dbg(&adev->dev, "revision = 0x%01x\n", ldata->hw_revision);
+	dev_dbg(&adev->dev, "designer ID = 0x%02x\n", amba_manf(adev));
+	dev_dbg(&adev->dev, "revision = 0x%01x\n", amba_rev(adev));
 
 	/* Enable the clockwatch on ST Variants */
-	if (ldata->hw_designer == AMBA_VENDOR_ST)
+	if (vendor->clockwatch)
 		writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN,
 		       ldata->base + RTC_CR);
 
@@ -351,7 +352,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 	 * 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 (vendor->st_weekday) {
 		if (readl(ldata->base + RTC_YDR) == 0x2000) {
 			time = readl(ldata->base + RTC_DR);
 			if ((time &
@@ -413,6 +414,8 @@ static struct pl031_vendor_data stv1_pl031 = {
 		.set_alarm = pl031_set_alarm,
 		.alarm_irq_enable = pl031_alarm_irq_enable,
 	},
+	.clockwatch = true,
+	.st_weekday = true,
 };
 
 /* And the second ST derivative */
@@ -424,6 +427,8 @@ static struct pl031_vendor_data stv2_pl031 = {
 		.set_alarm = pl031_stv2_set_alarm,
 		.alarm_irq_enable = pl031_alarm_irq_enable,
 	},
+	.clockwatch = true,
+	.st_weekday = true,
 };
 
 static struct amba_id pl031_ids[] = {