diff options
Diffstat (limited to 'drivers/cpufreq/pmac64-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/pmac64-cpufreq.c | 70 |
1 files changed, 14 insertions, 56 deletions
diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 3a51ad7e47c8..6a338f8c3860 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -70,11 +70,6 @@ static struct cpufreq_frequency_table g5_cpu_freqs[] = { {0, CPUFREQ_TABLE_END}, }; -static struct freq_attr* g5_cpu_freqs_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - /* Power mode data is an array of the 32 bits PCR values to use for * the various frequencies, retrieved from the device-tree */ @@ -84,8 +79,6 @@ static void (*g5_switch_volt)(int speed_mode); static int (*g5_switch_freq)(int speed_mode); static int (*g5_query_freq)(void); -static DEFINE_MUTEX(g5_switch_mutex); - static unsigned long transition_latency; #ifdef CONFIG_PMAC_SMU @@ -142,7 +135,7 @@ static void g5_vdnap_switch_volt(int speed_mode) pmf_call_one(pfunc_vdnap0_complete, &args); if (done) break; - msleep(1); + usleep_range(1000, 1000); } if (done == 0) printk(KERN_WARNING "cpufreq: Timeout in clock slewing !\n"); @@ -241,7 +234,7 @@ static void g5_pfunc_switch_volt(int speed_mode) if (pfunc_cpu1_volt_low) pmf_call_one(pfunc_cpu1_volt_low, NULL); } - msleep(10); /* should be faster , to fix */ + usleep_range(10000, 10000); /* should be faster , to fix */ } /* @@ -286,7 +279,7 @@ static int g5_pfunc_switch_freq(int speed_mode) pmf_call_one(pfunc_slewing_done, &args); if (done) break; - msleep(1); + usleep_range(500, 500); } if (done == 0) printk(KERN_WARNING "cpufreq: Timeout in clock slewing !\n"); @@ -317,37 +310,9 @@ static int g5_pfunc_query_freq(void) * Common interface to the cpufreq core */ -static int g5_cpufreq_verify(struct cpufreq_policy *policy) +static int g5_cpufreq_target(struct cpufreq_policy *policy, unsigned int index) { - return cpufreq_frequency_table_verify(policy, g5_cpu_freqs); -} - -static int g5_cpufreq_target(struct cpufreq_policy *policy, - unsigned int target_freq, unsigned int relation) -{ - unsigned int newstate = 0; - struct cpufreq_freqs freqs; - int rc; - - if (cpufreq_frequency_table_target(policy, g5_cpu_freqs, - target_freq, relation, &newstate)) - return -EINVAL; - - if (g5_pmode_cur == newstate) - return 0; - - mutex_lock(&g5_switch_mutex); - - freqs.old = g5_cpu_freqs[g5_pmode_cur].frequency; - freqs.new = g5_cpu_freqs[newstate].frequency; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - rc = g5_switch_freq(newstate); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - - mutex_unlock(&g5_switch_mutex); - - return rc; + return g5_switch_freq(index); } static unsigned int g5_cpufreq_get_speed(unsigned int cpu) @@ -357,27 +322,17 @@ static unsigned int g5_cpufreq_get_speed(unsigned int cpu) static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy) { - policy->cpuinfo.transition_latency = transition_latency; - policy->cur = g5_cpu_freqs[g5_query_freq()].frequency; - /* secondary CPUs are tied to the primary one by the - * cpufreq core if in the secondary policy we tell it that - * it actually must be one policy together with all others. */ - cpumask_copy(policy->cpus, cpu_online_mask); - cpufreq_frequency_table_get_attr(g5_cpu_freqs, policy->cpu); - - return cpufreq_frequency_table_cpuinfo(policy, - g5_cpu_freqs); + return cpufreq_generic_init(policy, g5_cpu_freqs, transition_latency); } - static struct cpufreq_driver g5_cpufreq_driver = { .name = "powermac", .flags = CPUFREQ_CONST_LOOPS, .init = g5_cpufreq_cpu_init, - .verify = g5_cpufreq_verify, - .target = g5_cpufreq_target, + .verify = cpufreq_generic_frequency_table_verify, + .target_index = g5_cpufreq_target, .get = g5_cpufreq_get_speed, - .attr = g5_cpu_freqs_attr, + .attr = cpufreq_generic_attr, }; @@ -397,7 +352,8 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpunode) /* Check supported platforms */ if (of_machine_is_compatible("PowerMac8,1") || of_machine_is_compatible("PowerMac8,2") || - of_machine_is_compatible("PowerMac9,1")) + of_machine_is_compatible("PowerMac9,1") || + of_machine_is_compatible("PowerMac12,1")) use_volts_smu = 1; else if (of_machine_is_compatible("PowerMac11,2")) use_volts_vdnap = 1; @@ -647,8 +603,10 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpunode) g5_cpu_freqs[0].frequency = max_freq; g5_cpu_freqs[1].frequency = min_freq; + /* Based on a measurement on Xserve G5, rounded up. */ + transition_latency = 10 * NSEC_PER_MSEC; + /* Set callbacks */ - transition_latency = CPUFREQ_ETERNAL; g5_switch_volt = g5_pfunc_switch_volt; g5_switch_freq = g5_pfunc_switch_freq; g5_query_freq = g5_pfunc_query_freq; |