[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>

diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 592ffcd..e340eb4 100644 (file)
--- 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 4373d7c..c8dfd18 100644 (file)
--- 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 22cf7aa..30c3f54 100644 (file)
--- 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);