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

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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>
This commit is contained in:
Mike Frysinger
2009-01-07 23:14:38 +08:00
committed by Bryan Wu
parent 7f1e2f98bd
commit 508808cda6
1 changed files with 4 additions and 0 deletions
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4
arch/blackfin/kernel/setup.c
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@@ -951,6 +951,10 @@ static u_long get_clkin_hz(void)
static int __init early_init_clkin_hz(char *buf) static int __init early_init_clkin_hz(char *buf)
{ {
cached_clkin_hz = simple_strtoul(buf, NULL, 0); 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; return 1;
} }
early_param("clkin_hz=", early_init_clkin_hz); early_param("clkin_hz=", early_init_clkin_hz);