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Commit 797cb8a6 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'pm-cpufreq' 

* pm-cpufreq:
  cpufreq: Make cpufreq_notify_transition & cpufreq_notify_post_transition static
  cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}
  cpufreq: Make sure frequency transitions are serialized
  intel_pstate: Use del_timer_sync in intel_pstate_cpu_stop
  cpufreq: resume drivers before enabling governors
parents f01a5865 236a9800

drivers/cpufreq/cpufreq-nforce2.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

}

drivers/cpufreq/cpufreq.c

+47 −14
Original line number Diff line number Diff line
@@ -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:

drivers/cpufreq/exynos5440-cpufreq.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

drivers/cpufreq/gx-suspmod.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

drivers/cpufreq/integrator-cpufreq.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

}