[SPARC64]: Stop using drivers/char/rtc.c

The existing sparc64 mini_rtc driver can handle CMOS based
rtcs trivially with just a few lines of code and the simplifies
things tremendously.

Tested on SB1500.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 86 insertions, 25 deletions

diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 592ffcd5760..e340eb401fb 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -1434,6 +1434,78 @@ static int bq4802_set_rtc_time(struct rtc_time *time)
 
 	return 0;
 }
+
+static void cmos_get_rtc_time(struct rtc_time *rtc_tm)
+{
+	unsigned char ctrl;
+
+	rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
+	rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);
+	rtc_tm->tm_hour = CMOS_READ(RTC_HOURS);
+	rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);
+	rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);
+	rtc_tm->tm_year = CMOS_READ(RTC_YEAR);
+	rtc_tm->tm_wday = CMOS_READ(RTC_DAY_OF_WEEK);
+
+	ctrl = CMOS_READ(RTC_CONTROL);
+	if (!(ctrl & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		BCD_TO_BIN(rtc_tm->tm_sec);
+		BCD_TO_BIN(rtc_tm->tm_min);
+		BCD_TO_BIN(rtc_tm->tm_hour);
+		BCD_TO_BIN(rtc_tm->tm_mday);
+		BCD_TO_BIN(rtc_tm->tm_mon);
+		BCD_TO_BIN(rtc_tm->tm_year);
+		BCD_TO_BIN(rtc_tm->tm_wday);
+	}
+
+	if (rtc_tm->tm_year <= 69)
+		rtc_tm->tm_year += 100;
+
+	rtc_tm->tm_mon--;
+}
+
+static int cmos_set_rtc_time(struct rtc_time *rtc_tm)
+{
+	unsigned char mon, day, hrs, min, sec;
+	unsigned char save_control, save_freq_select;
+	unsigned int yrs;
+
+	yrs = rtc_tm->tm_year;
+	mon = rtc_tm->tm_mon + 1;
+	day = rtc_tm->tm_mday;
+	hrs = rtc_tm->tm_hour;
+	min = rtc_tm->tm_min;
+	sec = rtc_tm->tm_sec;
+
+	if (yrs >= 100)
+		yrs -= 100;
+
+	if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		BIN_TO_BCD(sec);
+		BIN_TO_BCD(min);
+		BIN_TO_BCD(hrs);
+		BIN_TO_BCD(day);
+		BIN_TO_BCD(mon);
+		BIN_TO_BCD(yrs);
+	}
+
+	save_control = CMOS_READ(RTC_CONTROL);
+	CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
+	save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
+	CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
+
+	CMOS_WRITE(yrs, RTC_YEAR);
+	CMOS_WRITE(mon, RTC_MONTH);
+	CMOS_WRITE(day, RTC_DAY_OF_MONTH);
+	CMOS_WRITE(hrs, RTC_HOURS);
+	CMOS_WRITE(min, RTC_MINUTES);
+	CMOS_WRITE(sec, RTC_SECONDS);
+
+	CMOS_WRITE(save_control, RTC_CONTROL);
+	CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
+
+	return 0;
+}
 #endif /* CONFIG_PCI */
 
 struct mini_rtc_ops {
@@ -1456,6 +1528,11 @@ static struct mini_rtc_ops bq4802_rtc_ops = {
 	.get_rtc_time = bq4802_get_rtc_time,
 	.set_rtc_time = bq4802_set_rtc_time,
 };
+
+static struct mini_rtc_ops cmos_rtc_ops = {
+	.get_rtc_time = cmos_get_rtc_time,
+	.set_rtc_time = cmos_set_rtc_time,
+};
 #endif /* CONFIG_PCI */
 
 static struct mini_rtc_ops *mini_rtc_ops;
@@ -1583,6 +1660,8 @@ static int __init rtc_mini_init(void)
 #ifdef CONFIG_PCI
 	else if (bq4802_regs)
 		mini_rtc_ops = &bq4802_rtc_ops;
+	else if (ds1287_regs)
+		mini_rtc_ops = &cmos_rtc_ops;
 #endif /* CONFIG_PCI */
 	else
 		return -ENODEV;
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 4373d7cdc5d..c8dfd18bea4 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -726,7 +726,7 @@ config NVRAM
 
 config RTC
 	tristate "Enhanced Real Time Clock Support"
-	depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV && !ARM && !SUPERH && !S390
+	depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC64 && (!SPARC32 || PCI) && !FRV && !ARM && !SUPERH && !S390
 	---help---
 	  If you say Y here and create a character special file /dev/rtc with
 	  major number 10 and minor number 135 using mknod ("man mknod"), you
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 22cf7aa56cc..30c3f54c766 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -86,12 +86,9 @@
 #include <asm/hpet.h>
 #endif
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
 #include <linux/pci.h>
 #include <asm/ebus.h>
-#ifdef __sparc_v9__
-#include <asm/isa.h>
-#endif
 
 static unsigned long rtc_port;
 static int rtc_irq = PCI_IRQ_NONE;
@@ -930,13 +927,9 @@ static int __init rtc_init(void)
 	unsigned int year, ctrl;
 	char *guess = NULL;
 #endif
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
 	struct linux_ebus *ebus;
 	struct linux_ebus_device *edev;
-#ifdef __sparc_v9__
-	struct sparc_isa_bridge *isa_br;
-	struct sparc_isa_device *isa_dev;
-#endif
 #else
 	void *r;
 #ifdef RTC_IRQ
@@ -944,7 +937,7 @@ static int __init rtc_init(void)
 #endif
 #endif
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
 	for_each_ebus(ebus) {
 		for_each_ebusdev(edev, ebus) {
 			if(strcmp(edev->prom_node->name, "rtc") == 0) {
@@ -954,17 +947,6 @@ static int __init rtc_init(void)
 			}
 		}
 	}
-#ifdef __sparc_v9__
-	for_each_isa(isa_br) {
-		for_each_isadev(isa_dev, isa_br) {
-			if (strcmp(isa_dev->prom_node->name, "rtc") == 0) {
-				rtc_port = isa_dev->resource.start;
-				rtc_irq = isa_dev->irq;
-				goto found;
-			}
-		}
-	}
-#endif
 	rtc_has_irq = 0;
 	printk(KERN_ERR "rtc_init: no PC rtc found\n");
 	return -EIO;
@@ -1020,7 +1002,7 @@ no_irq:
 
 #endif
 
-#endif /* __sparc__ vs. others */
+#endif /* CONFIG_SPARC32 vs. others */
 
 	if (misc_register(&rtc_dev)) {
 #ifdef RTC_IRQ
@@ -1105,7 +1087,7 @@ static void __exit rtc_exit (void)
 	remove_proc_entry ("driver/rtc", NULL);
 	misc_deregister(&rtc_dev);
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
 	if (rtc_has_irq)
 		free_irq (rtc_irq, &rtc_port);
 #else
@@ -1117,7 +1099,7 @@ static void __exit rtc_exit (void)
 	if (rtc_has_irq)
 		free_irq (RTC_IRQ, NULL);
 #endif
-#endif /* __sparc__ */
+#endif /* CONFIG_SPARC32 */
 }
 
 module_init(rtc_init);