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Commit 7f3aee3c authored by Sonic Zhang's avatar Sonic Zhang Committed by Mike Frysinger
Browse files

Blackfin: detect anomaly 05000274 



Detect and reject operating conditions for anomaly 05000274 since the
problem cannot be worked around in software.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent d8804adf

arch/blackfin/kernel/setup.c

+2 −7
Original line number Diff line number Diff line
@@ -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();

arch/blackfin/mach-common/cpufreq.c

+2 −1
Original line number Diff line number Diff line
@@ -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;