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Merge branch 'pm-cpufreq'

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* pm-cpufreq:
  cpufreq: Avoid calling cpufreq_verify_current_freq() from handle_update()
  cpufreq: Consolidate cpufreq_update_current_freq() and __cpufreq_get()
  cpufreq: Don't skip frequency validation for has_target() drivers
  cpufreq: Use has_target() instead of !setpolicy
  cpufreq: Remove redundant !setpolicy check
  cpufreq: Move the IS_ENABLED(CPU_THERMAL) macro into a stub
  cpufreq: s5pv210: Don't flood kernel log after cpufreq change
  cpufreq: pcc-cpufreq: Fail initialization if driver cannot be registered
  cpufreq: add driver for Raspberry Pi
  cpufreq: Switch imx7d to imx-cpufreq-dt for speed grading
  cpufreq: imx-cpufreq-dt: Remove global platform match list
  cpufreq: brcmstb-avs-cpufreq: Fix types for voltage/frequency
  cpufreq: brcmstb-avs-cpufreq: Fix initial command check
  cpufreq: armada-37xx: Remove set but not used variable 'freq'
  cpufreq: imx-cpufreq-dt: Fix no OPPs available on unfused parts
  dt-bindings: imx-cpufreq-dt: Document opp-supported-hw usage
  cpufreq: Add imx-cpufreq-dt driver
This commit is contained in:
Rafael J. Wysocki
2019-07-08 11:00:02 +02:00
parent 13b06b78c7 70a59fde6e
commit 586a07dca8
13 changed files with 327 additions and 80 deletions
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121
drivers/cpufreq/cpufreq.c
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@@ -356,12 +356,10 @@ static void cpufreq_notify_transition(struct cpufreq_policy *policy,
* which is not equal to what the cpufreq core thinks is
* "old frequency".
*/
if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
if (policy->cur && (policy->cur != freqs->old)) {
pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",
freqs->old, policy->cur);
freqs->old = policy->cur;
}
if (policy->cur && policy->cur != freqs->old) {
pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",
freqs->old, policy->cur);
freqs->old = policy->cur;
}
srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
@@ -631,7 +629,7 @@ static int cpufreq_parse_policy(char *str_governor,
}
/**
* cpufreq_parse_governor - parse a governor string only for !setpolicy
* cpufreq_parse_governor - parse a governor string only for has_target()
*/
static int cpufreq_parse_governor(char *str_governor,
struct cpufreq_policy *policy)
@@ -1114,13 +1112,25 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int cp
return ret;
}
static void refresh_frequency_limits(struct cpufreq_policy *policy)
{
struct cpufreq_policy new_policy = *policy;
pr_debug("updating policy for CPU %u\n", policy->cpu);
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
cpufreq_set_policy(policy, &new_policy);
}
static void handle_update(struct work_struct *work)
{
struct cpufreq_policy *policy =
container_of(work, struct cpufreq_policy, update);
unsigned int cpu = policy->cpu;
pr_debug("handle_update for cpu %u called\n", cpu);
cpufreq_update_policy(cpu);
pr_debug("handle_update for cpu %u called\n", policy->cpu);
refresh_frequency_limits(policy);
}
static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
@@ -1300,7 +1310,7 @@ static int cpufreq_online(unsigned int cpu)
policy->max = policy->user_policy.max;
}
if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
if (cpufreq_driver->get && has_target()) {
policy->cur = cpufreq_driver->get(policy->cpu);
if (!policy->cur) {
pr_err("%s: ->get() failed\n", __func__);
@@ -1375,8 +1385,7 @@ static int cpufreq_online(unsigned int cpu)
if (cpufreq_driver->ready)
cpufreq_driver->ready(policy);
if (IS_ENABLED(CONFIG_CPU_THERMAL) &&
cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV)
if (cpufreq_thermal_control_enabled(cpufreq_driver))
policy->cdev = of_cpufreq_cooling_register(policy);
pr_debug("initialization complete\n");
@@ -1466,8 +1475,7 @@ static int cpufreq_offline(unsigned int cpu)
goto unlock;
}
if (IS_ENABLED(CONFIG_CPU_THERMAL) &&
cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) {
if (cpufreq_thermal_control_enabled(cpufreq_driver)) {
cpufreq_cooling_unregister(policy->cdev);
policy->cdev = NULL;
}
@@ -1546,6 +1554,30 @@ static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
cpufreq_freq_transition_end(policy, &freqs, 0);
}
static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, bool update)
{
unsigned int new_freq;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
/*
* If fast frequency switching is used with the given policy, the check
* against policy->cur is pointless, so skip it in that case.
*/
if (policy->fast_switch_enabled || !has_target())
return new_freq;
if (policy->cur != new_freq) {
cpufreq_out_of_sync(policy, new_freq);
if (update)
schedule_work(&policy->update);
}
return new_freq;
}
/**
* cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
* @cpu: CPU number
@@ -1601,31 +1633,10 @@ EXPORT_SYMBOL(cpufreq_quick_get_max);
static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
{
unsigned int ret_freq = 0;
if (unlikely(policy_is_inactive(policy)))
return ret_freq;
return 0;
ret_freq = cpufreq_driver->get(policy->cpu);
/*
* If fast frequency switching is used with the given policy, the check
* against policy->cur is pointless, so skip it in that case too.
*/
if (policy->fast_switch_enabled)
return ret_freq;
if (ret_freq && policy->cur &&
!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
/* verify no discrepancy between actual and
saved value exists */
if (unlikely(ret_freq != policy->cur)) {
cpufreq_out_of_sync(policy, ret_freq);
schedule_work(&policy->update);
}
}
return ret_freq;
return cpufreq_verify_current_freq(policy, true);
}
/**
@@ -1652,24 +1663,6 @@ unsigned int cpufreq_get(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_get);
static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
if (!policy->cur) {
pr_debug("cpufreq: Driver did not initialize current freq\n");
policy->cur = new_freq;
} else if (policy->cur != new_freq && has_target()) {
cpufreq_out_of_sync(policy, new_freq);
}
return new_freq;
}
static struct subsys_interface cpufreq_interface = {
.name = "cpufreq",
.subsys = &cpu_subsys,
@@ -2150,8 +2143,8 @@ static int cpufreq_start_governor(struct cpufreq_policy *policy)
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
cpufreq_update_current_freq(policy);
if (cpufreq_driver->get)
cpufreq_verify_current_freq(policy, false);
if (policy->governor->start) {
ret = policy->governor->start(policy);
@@ -2392,7 +2385,6 @@ int cpufreq_set_policy(struct cpufreq_policy *policy,
void cpufreq_update_policy(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
struct cpufreq_policy new_policy;
if (!policy)
return;
@@ -2401,16 +2393,11 @@ void cpufreq_update_policy(unsigned int cpu)
* BIOS might change freq behind our back
* -> ask driver for current freq and notify governors about a change
*/
if (cpufreq_driver->get && !cpufreq_driver->setpolicy &&
(cpufreq_suspended || WARN_ON(!cpufreq_update_current_freq(policy))))
if (cpufreq_driver->get && has_target() &&
(cpufreq_suspended || WARN_ON(!cpufreq_verify_current_freq(policy, false))))
goto unlock;
pr_debug("updating policy for CPU %u\n", cpu);
memcpy(&new_policy, policy, sizeof(*policy));
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
cpufreq_set_policy(policy, &new_policy);
refresh_frequency_limits(policy);
unlock:
cpufreq_cpu_release(policy);