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 c05e5e3..4dffb91 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -951,6 +951,10 @@
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);