m68k: Hook up rtc-generic

m68k has been a long time user of the generic RTC abstraction, so hook up
rtc-generic:
  - Create the "rtc-generic" platform device if mach_hwclk is set,
  - Add checks for mach_hwclk, in anticipation of RTC chip drivers being moved
    to drivers/rtc/.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

diff --git a/arch/m68k/include/asm/rtc.h b/arch/m68k/include/asm/rtc.h
index 5d3e038..a4d08ea 100644 (file)
--- a/arch/m68k/include/asm/rtc.h
+++ b/arch/m68k/include/asm/rtc.h
@@ -36,13 +36,16 @@ static inline unsigned int get_rtc_time(struct rtc_time *time)
         * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
         * by the RTC when initially set to a non-zero value.
         */
-       mach_hwclk(0, time);
+       if (mach_hwclk)
+               mach_hwclk(0, time);
        return RTC_24H;
 }
 
 static inline int set_rtc_time(struct rtc_time *time)
 {
-       return mach_hwclk(1, time);
+       if (mach_hwclk)
+               return mach_hwclk(1, time);
+       return -EINVAL;
 }
 
 static inline unsigned int get_rtc_ss(void)

diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 7db4159..54d9807 100644 (file)
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -18,6 +18,7 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/rtc.h>
+#include <linux/platform_device.h>
 
 #include <asm/machdep.h>
 #include <asm/io.h>
@@ -159,3 +160,20 @@ int do_settimeofday(struct timespec *tv)
 }
 
 EXPORT_SYMBOL(do_settimeofday);
+
+
+static int __init rtc_init(void)
+{
+       struct platform_device *pdev;
+
+       if (!mach_hwclk)
+               return -ENODEV;
+
+       pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
+       if (IS_ERR(pdev))
+               return PTR_ERR(pdev);
+
+       return 0;
+}
+
+module_init(rtc_init);

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 13df513..5aab5b9 100644 (file)
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -692,7 +692,7 @@ config RTC_DRV_GENERIC
        tristate "Generic RTC support"
        # Please consider writing a new RTC driver instead of using the generic
        # RTC abstraction
-       depends on PARISC
+       depends on PARISC || M68K
        help
          Say Y or M here to enable RTC support on systems using the generic
          RTC abstraction. If you do not know what you are doing, you should