From 7a69af63e788a324d162201a0b23df41bcf158dd Mon Sep 17 00:00:00 2001
From: Kim Phillips <kim.phillips@freescale.com>
Date: Tue, 26 Sep 2006 17:46:37 -0500
Subject: [PATCH] [POWERPC] Add powerpc get/set_rtc_time interface to new
generic rtc class
Add powerpc get/set_rtc_time interface to new generic rtc class. This
abstracts rtc chip specific code from the platform code for rtc-over-i2c
platforms. Specific RTC chip support is now configured under
Device Drivers -> Real Time Clock. Setting time of day from the RTC
on startup is also configurable.
this time without the potentially platform breaking initcall.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
arch/powerpc/kernel/time.c | 42 ++++++++++++++++++++++++++++++++++++++
include/asm-powerpc/time.h | 6 +++++-
2 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 7a3c3f791ade..b4ed362c457a 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -1048,6 +1048,48 @@ void __init time_init(void)
set_dec(tb_ticks_per_jiffy);
}
+#ifdef CONFIG_RTC_CLASS
+static int set_rtc_class_time(struct rtc_time *tm)
+{
+ int err;
+ struct class_device *class_dev =
+ rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
+
+ if (class_dev == NULL)
+ return -ENODEV;
+
+ err = rtc_set_time(class_dev, tm);
+
+ rtc_class_close(class_dev);
+
+ return 0;
+}
+
+static void get_rtc_class_time(struct rtc_time *tm)
+{
+ int err;
+ struct class_device *class_dev =
+ rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
+
+ if (class_dev == NULL)
+ return;
+
+ err = rtc_read_time(class_dev, tm);
+
+ rtc_class_close(class_dev);
+
+ return;
+}
+
+int __init rtc_class_hookup(void)
+{
+ ppc_md.get_rtc_time = get_rtc_class_time;
+ ppc_md.set_rtc_time = set_rtc_class_time;
+
+ return 0;
+}
+#endif /* CONFIG_RTC_CLASS */
+
#define FEBRUARY 2
#define STARTOFTIME 1970
diff --git a/include/asm-powerpc/time.h b/include/asm-powerpc/time.h
index 5785ac4737b5..b051d4c88c3b 100644
--- a/include/asm-powerpc/time.h
+++ b/include/asm-powerpc/time.h
@@ -39,6 +39,10 @@ extern void generic_calibrate_decr(void);
extern void wakeup_decrementer(void);
extern void snapshot_timebase(void);
+#ifdef CONFIG_RTC_CLASS
+extern int __init rtc_class_hookup(void);
+#endif
+
/* Some sane defaults: 125 MHz timebase, 1GHz processor */
extern unsigned long ppc_proc_freq;
#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8)
@@ -234,4 +238,4 @@ extern void snapshot_timebases(void);
#endif
#endif /* __KERNEL__ */
-#endif /* __PPC64_TIME_H */
+#endif /* __POWERPC_TIME_H */
--
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