diff options
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r-- | drivers/cpufreq/cpufreq-nforce2.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/cpufreq.c | 61 | ||||
-rw-r--r-- | drivers/cpufreq/exynos5440-cpufreq.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/gx-suspmod.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/integrator-cpufreq.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/intel_pstate.c | 2 | ||||
-rw-r--r-- | drivers/cpufreq/longhaul.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/pcc-cpufreq.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/powernow-k6.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/powernow-k7.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/powernow-k8.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/s3c24xx-cpufreq.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/sh-cpufreq.c | 4 | ||||
-rw-r--r-- | drivers/cpufreq/unicore2-cpufreq.c | 4 |
14 files changed, 72 insertions, 39 deletions
diff --git a/drivers/cpufreq/cpufreq-nforce2.c b/drivers/cpufreq/cpufreq-nforce2.c index a05b876..bc447b9 100644 --- a/drivers/cpufreq/cpufreq-nforce2.c +++ b/drivers/cpufreq/cpufreq-nforce2.c @@ -270,7 +270,7 @@ static int nforce2_target(struct cpufreq_policy *policy, pr_debug("Old CPU frequency %d kHz, new %d kHz\n", freqs.old, freqs.new); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); /* Disable IRQs */ /* local_irq_save(flags); */ @@ -285,7 +285,7 @@ static int nforce2_target(struct cpufreq_policy *policy, /* Enable IRQs */ /* local_irq_restore(flags); */ - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); return 0; } diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 3aa7a7a..abda660 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -331,16 +331,15 @@ static void __cpufreq_notify_transition(struct cpufreq_policy *policy, * function. It is called twice on all CPU frequency changes that have * external effects. */ -void cpufreq_notify_transition(struct cpufreq_policy *policy, +static void cpufreq_notify_transition(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs, unsigned int state) { for_each_cpu(freqs->cpu, policy->cpus) __cpufreq_notify_transition(policy, freqs, state); } -EXPORT_SYMBOL_GPL(cpufreq_notify_transition); /* Do post notifications when there are chances that transition has failed */ -void cpufreq_notify_post_transition(struct cpufreq_policy *policy, +static void cpufreq_notify_post_transition(struct cpufreq_policy *policy, struct cpufreq_freqs *freqs, int transition_failed) { cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); @@ -351,7 +350,41 @@ void cpufreq_notify_post_transition(struct cpufreq_policy *policy, cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE); } -EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition); + +void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs) +{ +wait: + wait_event(policy->transition_wait, !policy->transition_ongoing); + + spin_lock(&policy->transition_lock); + + if (unlikely(policy->transition_ongoing)) { + spin_unlock(&policy->transition_lock); + goto wait; + } + + policy->transition_ongoing = true; + + spin_unlock(&policy->transition_lock); + + cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE); +} +EXPORT_SYMBOL_GPL(cpufreq_freq_transition_begin); + +void cpufreq_freq_transition_end(struct cpufreq_policy *policy, + struct cpufreq_freqs *freqs, int transition_failed) +{ + if (unlikely(WARN_ON(!policy->transition_ongoing))) + return; + + cpufreq_notify_post_transition(policy, freqs, transition_failed); + + policy->transition_ongoing = false; + + wake_up(&policy->transition_wait); +} +EXPORT_SYMBOL_GPL(cpufreq_freq_transition_end); /********************************************************************* @@ -985,6 +1018,8 @@ static struct cpufreq_policy *cpufreq_policy_alloc(void) INIT_LIST_HEAD(&policy->policy_list); init_rwsem(&policy->rwsem); + spin_lock_init(&policy->transition_lock); + init_waitqueue_head(&policy->transition_wait); return policy; @@ -1470,8 +1505,8 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, policy = per_cpu(cpufreq_cpu_data, cpu); read_unlock_irqrestore(&cpufreq_driver_lock, flags); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_begin(policy, &freqs); + cpufreq_freq_transition_end(policy, &freqs, 0); } /** @@ -1652,14 +1687,13 @@ void cpufreq_resume(void) cpufreq_suspended = false; list_for_each_entry(policy, &cpufreq_policy_list, policy_list) { - if (__cpufreq_governor(policy, CPUFREQ_GOV_START) + if (cpufreq_driver->resume && cpufreq_driver->resume(policy)) + pr_err("%s: Failed to resume driver: %p\n", __func__, + policy); + else if (__cpufreq_governor(policy, CPUFREQ_GOV_START) || __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS)) pr_err("%s: Failed to start governor for policy: %p\n", __func__, policy); - else if (cpufreq_driver->resume - && cpufreq_driver->resume(policy)) - pr_err("%s: Failed to resume driver: %p\n", __func__, - policy); /* * schedule call cpufreq_update_policy() for boot CPU, i.e. last @@ -1832,8 +1866,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n", __func__, policy->cpu, freqs.old, freqs.new); - cpufreq_notify_transition(policy, &freqs, - CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); } retval = cpufreq_driver->target_index(policy, index); @@ -1842,7 +1875,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, __func__, retval); if (notify) - cpufreq_notify_post_transition(policy, &freqs, retval); + cpufreq_freq_transition_end(policy, &freqs, retval); } out: diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c index 7f776aa..a6b8214 100644 --- a/drivers/cpufreq/exynos5440-cpufreq.c +++ b/drivers/cpufreq/exynos5440-cpufreq.c @@ -219,7 +219,7 @@ static int exynos_target(struct cpufreq_policy *policy, unsigned int index) freqs.old = policy->cur; freqs.new = freq_table[index].frequency; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); /* Set the target frequency in all C0_3_PSTATE register */ for_each_cpu(i, policy->cpus) { @@ -258,7 +258,7 @@ static void exynos_cpufreq_work(struct work_struct *work) dev_crit(dvfs_info->dev, "New frequency out of range\n"); freqs.new = freqs.old; } - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); cpufreq_cpu_put(policy); mutex_unlock(&cpufreq_lock); diff --git a/drivers/cpufreq/gx-suspmod.c b/drivers/cpufreq/gx-suspmod.c index d83e826..1d723dc 100644 --- a/drivers/cpufreq/gx-suspmod.c +++ b/drivers/cpufreq/gx-suspmod.c @@ -265,7 +265,7 @@ static void gx_set_cpuspeed(struct cpufreq_policy *policy, unsigned int khz) freqs.new = new_khz; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); local_irq_save(flags); if (new_khz != stock_freq) { @@ -314,7 +314,7 @@ static void gx_set_cpuspeed(struct cpufreq_policy *policy, unsigned int khz) gx_params->pci_suscfg = suscfg; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); pr_debug("suspend modulation w/ duration of ON:%d us, OFF:%d us\n", gx_params->on_duration * 32, gx_params->off_duration * 32); diff --git a/drivers/cpufreq/integrator-cpufreq.c b/drivers/cpufreq/integrator-cpufreq.c index 0e27844..e5122f1 100644 --- a/drivers/cpufreq/integrator-cpufreq.c +++ b/drivers/cpufreq/integrator-cpufreq.c @@ -122,7 +122,7 @@ static int integrator_set_target(struct cpufreq_policy *policy, return 0; } - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); cm_osc = __raw_readl(cm_base + INTEGRATOR_HDR_OSC_OFFSET); @@ -143,7 +143,7 @@ static int integrator_set_target(struct cpufreq_policy *policy, */ set_cpus_allowed(current, cpus_allowed); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); return 0; } diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index bcb9a6d..0999673 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -778,7 +778,7 @@ static void intel_pstate_stop_cpu(struct cpufreq_policy *policy) pr_info("intel_pstate CPU %d exiting\n", cpu_num); - del_timer(&all_cpu_data[cpu_num]->timer); + del_timer_sync(&all_cpu_data[cpu_num]->timer); intel_pstate_set_pstate(cpu, cpu->pstate.min_pstate); kfree(all_cpu_data[cpu_num]); all_cpu_data[cpu_num] = NULL; diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c index 7b94da3..5c440f8 100644 --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -269,7 +269,7 @@ static void longhaul_setstate(struct cpufreq_policy *policy, freqs.old = calc_speed(longhaul_get_cpu_mult()); freqs.new = speed; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); pr_debug("Setting to FSB:%dMHz Mult:%d.%dx (%s)\n", fsb, mult/10, mult%10, print_speed(speed/1000)); @@ -386,7 +386,7 @@ retry_loop: } } /* Report true CPU frequency */ - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); if (!bm_timeout) printk(KERN_INFO PFX "Warning: Timeout while waiting for " diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index 1c0f1067..728a2d8 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -215,7 +215,7 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy, freqs.old = policy->cur; freqs.new = target_freq; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); input_buffer = 0x1 | (((target_freq * 100) / (ioread32(&pcch_hdr->nominal) * 1000)) << 8); @@ -231,7 +231,7 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy, status = ioread16(&pcch_hdr->status); iowrite16(0, &pcch_hdr->status); - cpufreq_notify_post_transition(policy, &freqs, status != CMD_COMPLETE); + cpufreq_freq_transition_end(policy, &freqs, status != CMD_COMPLETE); spin_unlock(&pcc_lock); if (status != CMD_COMPLETE) { diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c index ce27e6c..62c6f2e 100644 --- a/drivers/cpufreq/powernow-k6.c +++ b/drivers/cpufreq/powernow-k6.c @@ -148,11 +148,11 @@ static int powernow_k6_target(struct cpufreq_policy *policy, freqs.old = busfreq * powernow_k6_get_cpu_multiplier(); freqs.new = busfreq * clock_ratio[best_i].driver_data; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); powernow_k6_set_cpu_multiplier(best_i); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); return 0; } diff --git a/drivers/cpufreq/powernow-k7.c b/drivers/cpufreq/powernow-k7.c index 0e68e02..f911645 100644 --- a/drivers/cpufreq/powernow-k7.c +++ b/drivers/cpufreq/powernow-k7.c @@ -269,7 +269,7 @@ static int powernow_target(struct cpufreq_policy *policy, unsigned int index) freqs.new = powernow_table[index].frequency; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); /* Now do the magic poking into the MSRs. */ @@ -290,7 +290,7 @@ static int powernow_target(struct cpufreq_policy *policy, unsigned int index) if (have_a0 == 1) local_irq_enable(); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); return 0; } diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 27eb2be..770a9e1 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -963,9 +963,9 @@ static int transition_frequency_fidvid(struct powernow_k8_data *data, policy = cpufreq_cpu_get(smp_processor_id()); cpufreq_cpu_put(policy); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); res = transition_fid_vid(data, fid, vid); - cpufreq_notify_post_transition(policy, &freqs, res); + cpufreq_freq_transition_end(policy, &freqs, res); return res; } diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c index 2506974..a3dc192 100644 --- a/drivers/cpufreq/s3c24xx-cpufreq.c +++ b/drivers/cpufreq/s3c24xx-cpufreq.c @@ -217,7 +217,7 @@ static int s3c_cpufreq_settarget(struct cpufreq_policy *policy, s3c_cpufreq_updateclk(clk_pclk, cpu_new.freq.pclk); /* start the frequency change */ - cpufreq_notify_transition(policy, &freqs.freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs.freqs); /* If hclk is staying the same, then we do not need to * re-write the IO or the refresh timings whilst we are changing @@ -261,7 +261,7 @@ static int s3c_cpufreq_settarget(struct cpufreq_policy *policy, local_irq_restore(flags); /* notify everyone we've done this */ - cpufreq_notify_transition(policy, &freqs.freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs.freqs, 0); s3c_freq_dbg("%s: finished\n", __func__); return 0; diff --git a/drivers/cpufreq/sh-cpufreq.c b/drivers/cpufreq/sh-cpufreq.c index 696170e..86628e2 100644 --- a/drivers/cpufreq/sh-cpufreq.c +++ b/drivers/cpufreq/sh-cpufreq.c @@ -68,10 +68,10 @@ static int sh_cpufreq_target(struct cpufreq_policy *policy, freqs.new = (freq + 500) / 1000; freqs.flags = 0; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); set_cpus_allowed_ptr(current, &cpus_allowed); clk_set_rate(cpuclk, freq); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + cpufreq_freq_transition_end(policy, &freqs, 0); dev_dbg(dev, "set frequency %lu Hz\n", freq); diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c index 36cc330..13be802 100644 --- a/drivers/cpufreq/unicore2-cpufreq.c +++ b/drivers/cpufreq/unicore2-cpufreq.c @@ -44,9 +44,9 @@ static int ucv2_target(struct cpufreq_policy *policy, freqs.old = policy->cur; freqs.new = target_freq; - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + cpufreq_freq_transition_begin(policy, &freqs); ret = clk_set_rate(policy->mclk, target_freq * 1000); - cpufreq_notify_post_transition(policy, &freqs, ret); + cpufreq_freq_transition_end(policy, &freqs, ret); return ret; } |