summaryrefslogtreecommitdiff
path: root/drivers/cpufreq
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq-nforce2.c4
-rw-r--r--drivers/cpufreq/cpufreq.c61
-rw-r--r--drivers/cpufreq/exynos5440-cpufreq.c4
-rw-r--r--drivers/cpufreq/gx-suspmod.c4
-rw-r--r--drivers/cpufreq/integrator-cpufreq.c4
-rw-r--r--drivers/cpufreq/intel_pstate.c2
-rw-r--r--drivers/cpufreq/longhaul.c4
-rw-r--r--drivers/cpufreq/pcc-cpufreq.c4
-rw-r--r--drivers/cpufreq/powernow-k6.c4
-rw-r--r--drivers/cpufreq/powernow-k7.c4
-rw-r--r--drivers/cpufreq/powernow-k8.c4
-rw-r--r--drivers/cpufreq/s3c24xx-cpufreq.c4
-rw-r--r--drivers/cpufreq/sh-cpufreq.c4
-rw-r--r--drivers/cpufreq/unicore2-cpufreq.c4
14 files changed, 72 insertions, 39 deletions
diff --git a/drivers/cpufreq/cpufreq-nforce2.c b/drivers/cpufreq/cpufreq-nforce2.c
index a05b876f375e..bc447b9003c3 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 3aa7a7a226b3..abda6609d3e7 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 7f776aa91e2f..a6b8214d7b77 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 d83e8266a58e..1d723dc8880c 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 0e27844e8c2d..e5122f1bfe78 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 bcb9a6d0ae11..099967302bf2 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 7b94da3d2d10..5c440f87ba8a 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 1c0f1067af73..728a2d879499 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 ce27e6c26c94..62c6f2e5afce 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 0e68e0275621..f911645c3f6d 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 27eb2be44de5..770a9e1b3468 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 25069741b507..a3dc192d21f9 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 696170ebd3a3..86628e22b2a3 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 36cc330b8747..13be802b6170 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;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 05:29:56 +0000