commit 1ed2053563d4d0bf70864a9df53c7a5dce7724e9
author John Stultz <john.stultz@linaro.org> Fri Jul 22 09:12:51 2011 +0000
committer Greg Kroah-Hartman <gregkh@suse.de> Mon Oct 03 11:40:08 2011 -0700
tree e6ab98a2249cc9015a48deb25d0255837de25f58
parent c3a44b4d23f4cb1b3eafb8c2c74d88f452d50a6d

rtc: Fix RTC PIE frequency limit

commit 938f97bcf1bdd1b681d5d14d1d7117a2e22d4434 upstream.

Thomas earlier submitted a fix to limit the RTC PIE freq, but
picked 5000Hz out of the air. Willy noticed that we should
instead use the 8192Hz max from the rtc man documentation.

Cc: Willy Tarreau <w@1wt.eu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/rtc.h

diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index b27ebea..93f4d03 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -97,6 +97,9 @@
 #define RTC_AF 0x20	/* Alarm interrupt */
 #define RTC_UF 0x10	/* Update interrupt for 1Hz RTC */
 
+
+#define RTC_MAX_FREQ	8192
+
 #ifdef __KERNEL__
 
 #include <linux/types.h>