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>

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index 5a4a03670085e3a9712003089e6e3677af907c48..dc30e0aa54cd2497a3d7470e09739870a78d5076 100644 (file)
--- 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 72e16605ca09f61f41bb3d8d3302ad6123d08d8b..70e3411f558c189b7f2f28ef67c3a5e706fa8857 100644 (file)
--- 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;