diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/cell/cbe_cpufreq.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c index 4495973bff5..f9ac3fe3be9 100644 --- a/arch/powerpc/platforms/cell/cbe_cpufreq.c +++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c @@ -25,6 +25,7 @@ #include <asm/hw_irq.h> #include <asm/io.h> +#include <asm/machdep.h> #include <asm/processor.h> #include <asm/prom.h> #include <asm/time.h> @@ -155,7 +156,7 @@ static int set_pmode_reg(int cpu, unsigned int pmode) } static int set_pmode(int cpu, unsigned int slow_mode) { - if(pmi_dev) + if (pmi_dev) return set_pmode_pmi(cpu, slow_mode); else return set_pmode_reg(cpu, slow_mode); @@ -167,7 +168,7 @@ static void cbe_cpufreq_handle_pmi(struct of_device *dev, pmi_message_t pmi_msg) u8 cpu; u8 cbe_pmode_new; - BUG_ON (pmi_msg.type != PMI_TYPE_FREQ_CHANGE); + BUG_ON(pmi_msg.type != PMI_TYPE_FREQ_CHANGE); cpu = cbe_node_to_cpu(pmi_msg.data1); cbe_pmode_new = pmi_msg.data2; @@ -191,7 +192,7 @@ static struct pmi_handler cbe_pmi_handler = { * cpufreq functions */ -static int cbe_cpufreq_cpu_init (struct cpufreq_policy *policy) +static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) { const u32 *max_freqp; u32 max_freq; @@ -200,7 +201,7 @@ static int cbe_cpufreq_cpu_init (struct cpufreq_policy *policy) cpu = of_get_cpu_node(policy->cpu, NULL); - if(!cpu) + if (!cpu) return -ENODEV; pr_debug("init cpufreq on CPU %d\n", policy->cpu); @@ -210,13 +211,13 @@ static int cbe_cpufreq_cpu_init (struct cpufreq_policy *policy) if (!max_freqp) return -EINVAL; - // we need the freq in kHz + /* we need the freq in kHz */ max_freq = *max_freqp / 1000; pr_debug("max clock-frequency is at %u kHz\n", max_freq); pr_debug("initializing frequency table\n"); - // initialize frequency table + /* initialize frequency table */ for (i=0; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) { cbe_freqs[i].frequency = max_freq / cbe_freqs[i].index; pr_debug("%d: %d\n", i, cbe_freqs[i].frequency); @@ -235,10 +236,10 @@ static int cbe_cpufreq_cpu_init (struct cpufreq_policy *policy) policy->cpus = cpu_sibling_map[policy->cpu]; #endif - cpufreq_frequency_table_get_attr (cbe_freqs, policy->cpu); + cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu); /* this ensures that policy->cpuinfo_min and policy->cpuinfo_max are set correctly */ - return cpufreq_frequency_table_cpuinfo (policy, cbe_freqs); + return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs); } static int cbe_cpufreq_cpu_exit(struct cpufreq_policy *policy) @@ -270,7 +271,7 @@ static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int target freqs.new = cbe_freqs[cbe_pmode_new].frequency; freqs.cpu = policy->cpu; - mutex_lock (&cbe_switch_mutex); + mutex_lock(&cbe_switch_mutex); cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); pr_debug("setting frequency for cpu %d to %d kHz, 1/%d of max frequency\n", @@ -303,6 +304,9 @@ static int __init cbe_cpufreq_init(void) { struct device_node *np; + if (!machine_is(cell)) + return -ENODEV; + np = of_find_node_by_type(NULL, "ibm,pmi"); pmi_dev = of_find_device_by_node(np); @@ -315,7 +319,7 @@ static int __init cbe_cpufreq_init(void) static void __exit cbe_cpufreq_exit(void) { - if(pmi_dev) + if (pmi_dev) pmi_unregister_handler(pmi_dev, &cbe_pmi_handler); cpufreq_unregister_driver(&cbe_cpufreq_driver); |