diff options
| author | Paul Mackerras <paulus@samba.org> | 2007-02-08 05:03:11 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-02-08 05:03:11 +0100 |
| commit | d5112a4f31a361409d3c57dc9d58dd69f8014bef (patch) | |
| tree | 64771300b2191cb94d9aaf60355661a01c2ccd1a /arch/arm/mach-imx/cpufreq.c | |
| parent | [POWERPC] Only use H_BULK_REMOVE if the firmware supports it (diff) | |
| parent | [POWERPC] Fixup error handling when emulating a floating point instruction (diff) | |
| download | linux-d5112a4f31a361409d3c57dc9d58dd69f8014bef.tar.xz linux-d5112a4f31a361409d3c57dc9d58dd69f8014bef.zip | |
Merge branch 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into for-2.6.21
Diffstat (limited to 'arch/arm/mach-imx/cpufreq.c')
| -rw-r--r-- | arch/arm/mach-imx/cpufreq.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c index ac5f99895660..4f66e90db74f 100644 --- a/arch/arm/mach-imx/cpufreq.c +++ b/arch/arm/mach-imx/cpufreq.c @@ -184,6 +184,17 @@ static int imx_set_target(struct cpufreq_policy *policy, long sysclk; unsigned int bclk_div = 1; + /* + * Some governors do not respects CPU and policy lower limits + * which leads to bad things (division by zero etc), ensure + * that such things do not happen. + */ + if(target_freq < policy->cpuinfo.min_freq) + target_freq = policy->cpuinfo.min_freq; + + if(target_freq < policy->min) + target_freq = policy->min; + freq = target_freq * 1000; pr_debug(KERN_DEBUG "imx: requested frequency %ld Hz, mpctl0 at boot 0x%08x\n", @@ -258,7 +269,8 @@ static int __init imx_cpufreq_driver_init(struct cpufreq_policy *policy) policy->governor = CPUFREQ_DEFAULT_GOVERNOR; policy->cpuinfo.min_freq = 8000; policy->cpuinfo.max_freq = 200000; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; + /* Manual states, that PLL stabilizes in two CLK32 periods */ + policy->cpuinfo.transition_latency = 4 * 1000000000LL / CLK32; return 0; } |