From: Mike Frysinger <vapier.adi@gmail.com>
Date: Wed, 7 Jan 2009 15:14:38 +0000 (+0800)
Subject: Blackfin arch: do not allow people to pass in a diff clkin_hz value
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=508808cda6c39819f51b58e95ba5c6222acea222;p=linux-beck.git

Blackfin arch: do not allow people to pass in a diff clkin_hz value

do not allow people to pass in a diff clkin_hz value when
reprogramming clocks -- it is too late currently

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index c05e5e3bad68..4dffb913147e 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -951,6 +951,10 @@ static u_long get_clkin_hz(void)
 static int __init early_init_clkin_hz(char *buf)
 {
 	cached_clkin_hz = simple_strtoul(buf, NULL, 0);
+#ifdef BFIN_KERNEL_CLOCK
+	if (cached_clkin_hz != CONFIG_CLKIN_HZ)
+		panic("cannot change clkin_hz when reprogramming clocks");
+#endif
 	return 1;
 }
 early_param("clkin_hz=", early_init_clkin_hz);