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Blackfin: detect anomaly 05000274

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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>
This commit is contained in:
Sonic Zhang 2009-05-07 10:04:19 +00:00 committed by Mike Frysinger
parent d8804adf52
commit 7f3aee3c18
2 changed files with 4 additions and 8 deletions
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9
arch/blackfin/kernel/setup.c
View File

@ -801,10 +801,8 @@ void __init setup_arch(char **cmdline_p)
cclk = get_cclk(); cclk = get_cclk();
sclk = get_sclk(); sclk = get_sclk();
#if !defined(CONFIG_BFIN_KERNEL_CLOCK) if ((ANOMALY_05000273 || ANOMALY_05000274) && (cclk >> 1) < sclk)
if (ANOMALY_05000273 && cclk == sclk) panic("ANOMALY 05000273 or 05000274: CCLK must be >= 2*SCLK");
panic("ANOMALY 05000273, SCLK can not be same as CCLK");
#endif
#ifdef BF561_FAMILY #ifdef BF561_FAMILY
if (ANOMALY_05000266) { 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", printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
cclk / 1000000, sclk / 1000000); 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(); setup_bootmem_allocator();
paging_init(); paging_init();

3
arch/blackfin/mach-common/cpufreq.c
View File

@ -140,7 +140,8 @@ static int __init __bfin_cpu_init(struct cpufreq_policy *policy)
cclk = get_cclk() / 1000; cclk = get_cclk() / 1000;
sclk = get_sclk() / 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; min_cclk = sclk * 2;
#else #else
min_cclk = sclk; min_cclk = sclk;