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authorSonic Zhang <sonic.zhang@analog.com>2009-05-07 10:04:19 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-12 06:11:35 -0400
commit7f3aee3c187641ec7c7e260d9cabb71ac4ac9f7c (patch)
treef4c43c51e75bf5c74bf73da44e3d2d0789d7e340 /arch/blackfin
parentd8804adf52f5991388fa9af77428e4cc7768059d (diff)
Blackfin: detect anomaly 05000274
Detect and reject operating conditions for anomaly 05000274 since the problem cannot be worked around in software. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/setup.c9
-rw-r--r--arch/blackfin/mach-common/cpufreq.c3
2 files changed, 4 insertions, 8 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 5a4a0367008..dc30e0aa54c 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -801,10 +801,8 @@ void __init setup_arch(char **cmdline_p)
cclk = get_cclk();
sclk = get_sclk();
-#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
- if (ANOMALY_05000273 && cclk == sclk)
- panic("ANOMALY 05000273, SCLK can not be same as CCLK");
-#endif
+ if ((ANOMALY_05000273 || ANOMALY_05000274) && (cclk >> 1) < sclk)
+ panic("ANOMALY 05000273 or 05000274: CCLK must be >= 2*SCLK");
#ifdef BF561_FAMILY
if (ANOMALY_05000266) {
@@ -903,9 +901,6 @@ void __init setup_arch(char **cmdline_p)
printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
cclk / 1000000, sclk / 1000000);
- if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
- printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
-
setup_bootmem_allocator();
paging_init();
diff --git a/arch/blackfin/mach-common/cpufreq.c b/arch/blackfin/mach-common/cpufreq.c
index 72e16605ca0..70e3411f558 100644
--- a/arch/blackfin/mach-common/cpufreq.c
+++ b/arch/blackfin/mach-common/cpufreq.c
@@ -140,7 +140,8 @@ static int __init __bfin_cpu_init(struct cpufreq_policy *policy)
cclk = get_cclk() / 1000;
sclk = get_sclk() / 1000;
-#if ANOMALY_05000273 || (!defined(CONFIG_BF54x) && defined(CONFIG_BFIN_DCACHE))
+#if ANOMALY_05000273 || ANOMALY_05000274 || \
+ (!defined(CONFIG_BF54x) && defined(CONFIG_BFIN_DCACHE))
min_cclk = sclk * 2;
#else
min_cclk = sclk;