[POWERPC] PS3: Add os-area rtc_diff set/get routines

Updates for PS3 os-area rtc_diff set/get routines
o Add a new routine ps3_os_area_set_rtc_diff().
o Rename ps3_os_area_rtc_diff() to ps3_os_area_get_rtc_diff().
o Remove static variable rtc_shift with calls to ps3_os_area_get_rtc_diff().

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 17 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c
index db311a147c28..473aee8580ce 100644
--- a/arch/powerpc/platforms/ps3/os-area.c
+++ b/arch/powerpc/platforms/ps3/os-area.c
@@ -261,16 +261,31 @@ void __init ps3_os_area_save_params(void)
 }
 
 /**
- * ps3_os_area_rtc_diff - Returns the rtc diff value.
+ * ps3_os_area_get_rtc_diff - Returns the rtc diff value.
  */
 
-u64 ps3_os_area_rtc_diff(void)
+u64 ps3_os_area_get_rtc_diff(void)
 {
 	return saved_params.rtc_diff ? saved_params.rtc_diff
 		: SECONDS_FROM_1970_TO_2000;
 }
 
 /**
+ * ps3_os_area_set_rtc_diff - Set the rtc diff value.
+ *
+ * An asynchronous write is needed to support writing updates from
+ * the timer interrupt context.
+ */
+
+void ps3_os_area_set_rtc_diff(u64 rtc_diff)
+{
+	if (saved_params.rtc_diff != rtc_diff) {
+		saved_params.rtc_diff = rtc_diff;
+		os_area_queue_work();
+	}
+}
+
+/**
  * ps3_os_area_get_av_multi_out - Returns the default video mode.
  */