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Merge tag 'pm-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Browse Source 
Pull power management updates from Rafael Wysocki:
 "There are no real big ticket items here this time.

  The most noticeable change is probably the relocation of the OPP
  (Operating Performance Points) framework to its own directory under
  drivers/ as it has grown big enough for that. Also Viresh is now going
  to maintain it and send pull requests for it to me, so you will see
  this change in the git history going forward (but still not right
  now).

  Another noticeable set of changes is the modifications of the PM core,
  the PCI subsystem and the ACPI PM domain to allow of more integration
  between system-wide suspend/resume and runtime PM. For now it's just a
  way to avoid resuming devices from runtime suspend unnecessarily
  during system suspend (if the driver sets a flag to indicate its
  readiness for that) and in the works is an analogous mechanism to
  allow devices to stay suspended after system resume.

  In addition to that, we have some changes related to supporting
  frequency-invariant CPU utilization metrics in the scheduler and in
  the schedutil cpufreq governor on ARM and changes to add support for
  device performance states to the generic power domains (genpd)
  framework.

  The rest is mostly fixes and cleanups of various sorts.

  Specifics:

   - Relocate the OPP (Operating Performance Points) framework to its
     own directory under drivers/ and add support for power domain
     performance states to it (Viresh Kumar).

   - Modify the PM core, the PCI bus type and the ACPI PM domain to
     support power management driver flags allowing device drivers to
     specify their capabilities and preferences regarding the handling
     of devices with enabled runtime PM during system suspend/resume and
     clean up that code somewhat (Rafael Wysocki, Ulf Hansson).

   - Add frequency-invariant accounting support to the task scheduler on
     ARM and ARM64 (Dietmar Eggemann).

   - Fix PM QoS device resume latency framework to prevent "no
     restriction" requests from overriding requests with specific
     requirements and drop the confusing PM_QOS_FLAG_REMOTE_WAKEUP
     device PM QoS flag (Rafael Wysocki).

   - Drop legacy class suspend/resume operations from the PM core and
     drop legacy bus type suspend and resume callbacks from ARM/locomo
     (Rafael Wysocki).

   - Add min/max frequency support to devfreq and clean it up somewhat
     (Chanwoo Choi).

   - Rework wakeup support in the generic power domains (genpd)
     framework and update some of its users accordingly (Geert
     Uytterhoeven).

   - Convert timers in the PM core to use timer_setup() (Kees Cook).

   - Add support for exposing the SLP_S0 (Low Power S0 Idle) residency
     counter based on the LPIT ACPI table on Intel platforms (Srinivas
     Pandruvada).

   - Add per-CPU PM QoS resume latency support to the ladder cpuidle
     governor (Ramesh Thomas).

   - Fix a deadlock between the wakeup notify handler and the notifier
     removal in the ACPI core (Ville Syrjälä).

   - Fix a cpufreq schedutil governor issue causing it to use stale
     cached frequency values sometimes (Viresh Kumar).

   - Fix an issue in the system suspend core support code causing wakeup
     events detection to fail in some cases (Rajat Jain).

   - Fix the generic power domains (genpd) framework to prevent the PM
     core from using the direct-complete optimization with it as that is
     guaranteed to fail (Ulf Hansson).

   - Fix a minor issue in the cpuidle core and clean it up a bit (Gaurav
     Jindal, Nicholas Piggin).

   - Fix and clean up the intel_idle and ARM cpuidle drivers (Jason
     Baron, Len Brown, Leo Yan).

   - Fix a couple of minor issues in the OPP framework and clean it up
     (Arvind Yadav, Fabio Estevam, Sudeep Holla, Tobias Jordan).

   - Fix and clean up some cpufreq drivers and fix a minor issue in the
     cpufreq statistics code (Arvind Yadav, Bhumika Goyal, Fabio
     Estevam, Gautham Shenoy, Gustavo Silva, Marek Szyprowski, Masahiro
     Yamada, Robert Jarzmik, Zumeng Chen).

   - Fix minor issues in the system suspend and hibernation core, in
     power management documentation and in the AVS (Adaptive Voltage
     Scaling) framework (Helge Deller, Himanshu Jha, Joe Perches, Rafael
     Wysocki).

   - Fix some issues in the cpupower utility and document that Shuah
     Khan is going to maintain it going forward (Prarit Bhargava, Shuah
     Khan)"

* tag 'pm-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (88 commits)
  tools/power/cpupower: add libcpupower.so.0.0.1 to .gitignore
  tools/power/cpupower: Add 64 bit library detection
  intel_idle: Graceful probe failure when MWAIT is disabled
  cpufreq: schedutil: Reset cached_raw_freq when not in sync with next_freq
  freezer: Fix typo in freezable_schedule_timeout() comment
  PM / s2idle: Clear the events_check_enabled flag
  cpufreq: stats: Handle the case when trans_table goes beyond PAGE_SIZE
  cpufreq: arm_big_little: make cpufreq_arm_bL_ops structures const
  cpufreq: arm_big_little: make function arguments and structure pointer const
  cpuidle: Avoid assignment in if () argument
  cpuidle: Clean up cpuidle_enable_device() error handling a bit
  ACPI / PM: Fix acpi_pm_notifier_lock vs flush_workqueue() deadlock
  PM / Domains: Fix genpd to deal with drivers returning 1 from ->prepare()
  cpuidle: ladder: Add per CPU PM QoS resume latency support
  PM / QoS: Fix device resume latency framework
  PM / domains: Rework governor code to be more consistent
  PM / Domains: Remove gpd_dev_ops.active_wakeup() callback
  soc: rockchip: power-domain: Use GENPD_FLAG_ACTIVE_WAKEUP
  soc: mediatek: Use GENPD_FLAG_ACTIVE_WAKEUP
  ARM: shmobile: pm-rmobile: Use GENPD_FLAG_ACTIVE_WAKEUP
  ...
This commit is contained in:
Linus Torvalds
2017-11-13 19:43:50 -08:00
parent b29c6ef7bb 990a848d53
commit bd2cd7d5a8
99 changed files with 1765 additions and 1070 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/base/power/Makefile
View File

@@ -2,7 +2,6 @@
obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o wakeirq.o
obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o
obj-$(CONFIG_PM_TRACE_RTC) += trace.o
obj-$(CONFIG_PM_OPP) += opp/
obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o
obj-$(CONFIG_HAVE_CLK) += clock_ops.o

226
drivers/base/power/domain.c
View File

@@ -124,6 +124,7 @@ static const struct genpd_lock_ops genpd_spin_ops = {
#define genpd_status_on(genpd) (genpd->status == GPD_STATE_ACTIVE)
#define genpd_is_irq_safe(genpd) (genpd->flags & GENPD_FLAG_IRQ_SAFE)
#define genpd_is_always_on(genpd) (genpd->flags & GENPD_FLAG_ALWAYS_ON)
#define genpd_is_active_wakeup(genpd) (genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP)
static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
const struct generic_pm_domain *genpd)
@@ -237,6 +238,95 @@ static void genpd_update_accounting(struct generic_pm_domain *genpd)
static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {}
#endif
/**
* dev_pm_genpd_set_performance_state- Set performance state of device's power
* domain.
*
* @dev: Device for which the performance-state needs to be set.
* @state: Target performance state of the device. This can be set as 0 when the
* device doesn't have any performance state constraints left (And so
* the device wouldn't participate anymore to find the target
* performance state of the genpd).
*
* It is assumed that the users guarantee that the genpd wouldn't be detached
* while this routine is getting called.
*
* Returns 0 on success and negative error values on failures.
*/
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
{
struct generic_pm_domain *genpd;
struct generic_pm_domain_data *gpd_data, *pd_data;
struct pm_domain_data *pdd;
unsigned int prev;
int ret = 0;
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -ENODEV;
if (unlikely(!genpd->set_performance_state))
return -EINVAL;
if (unlikely(!dev->power.subsys_data ||
!dev->power.subsys_data->domain_data)) {
WARN_ON(1);
return -EINVAL;
}
genpd_lock(genpd);
gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
prev = gpd_data->performance_state;
gpd_data->performance_state = state;
/* New requested state is same as Max requested state */
if (state == genpd->performance_state)
goto unlock;
/* New requested state is higher than Max requested state */
if (state > genpd->performance_state)
goto update_state;
/* Traverse all devices within the domain */
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
pd_data = to_gpd_data(pdd);
if (pd_data->performance_state > state)
state = pd_data->performance_state;
}
if (state == genpd->performance_state)
goto unlock;
/*
* We aren't propagating performance state changes of a subdomain to its
* masters as we don't have hardware that needs it. Over that, the
* performance states of subdomain and its masters may not have
* one-to-one mapping and would require additional information. We can
* get back to this once we have hardware that needs it. For that
* reason, we don't have to consider performance state of the subdomains
* of genpd here.
*/
update_state:
if (genpd_status_on(genpd)) {
ret = genpd->set_performance_state(genpd, state);
if (ret) {
gpd_data->performance_state = prev;
goto unlock;
}
}
genpd->performance_state = state;
unlock:
genpd_unlock(genpd);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
{
unsigned int state_idx = genpd->state_idx;
@@ -256,6 +346,15 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
return ret;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (unlikely(genpd->set_performance_state)) {
ret = genpd->set_performance_state(genpd, genpd->performance_state);
if (ret) {
pr_warn("%s: Failed to set performance state %d (%d)\n",
genpd->name, genpd->performance_state, ret);
}
}
if (elapsed_ns <= genpd->states[state_idx].power_on_latency_ns)
return ret;
@@ -346,9 +445,7 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
enum pm_qos_flags_status stat;
stat = dev_pm_qos_flags(pdd->dev,
PM_QOS_FLAG_NO_POWER_OFF
| PM_QOS_FLAG_REMOTE_WAKEUP);
stat = dev_pm_qos_flags(pdd->dev, PM_QOS_FLAG_NO_POWER_OFF);
if (stat > PM_QOS_FLAGS_NONE)
return -EBUSY;
@@ -749,11 +846,7 @@ late_initcall(genpd_power_off_unused);
#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_GENERIC_DOMAINS_OF)
/**
* pm_genpd_present - Check if the given PM domain has been initialized.
* @genpd: PM domain to check.
*/
static bool pm_genpd_present(const struct generic_pm_domain *genpd)
static bool genpd_present(const struct generic_pm_domain *genpd)
{
const struct generic_pm_domain *gpd;
@@ -771,12 +864,6 @@ static bool pm_genpd_present(const struct generic_pm_domain *genpd)
#ifdef CONFIG_PM_SLEEP
static bool genpd_dev_active_wakeup(const struct generic_pm_domain *genpd,
struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, bool, active_wakeup, dev);
}
/**
* genpd_sync_power_off - Synchronously power off a PM domain and its masters.
* @genpd: PM domain to power off, if possible.
@@ -863,7 +950,7 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock,
* @genpd: PM domain the device belongs to.
*
* There are two cases in which a device that can wake up the system from sleep
* states should be resumed by pm_genpd_prepare(): (1) if the device is enabled
* states should be resumed by genpd_prepare(): (1) if the device is enabled
* to wake up the system and it has to remain active for this purpose while the
* system is in the sleep state and (2) if the device is not enabled to wake up
* the system from sleep states and it generally doesn't generate wakeup signals
@@ -881,12 +968,12 @@ static bool resume_needed(struct device *dev,
if (!device_can_wakeup(dev))
return false;
active_wakeup = genpd_dev_active_wakeup(genpd, dev);
active_wakeup = genpd_is_active_wakeup(genpd);
return device_may_wakeup(dev) ? active_wakeup : !active_wakeup;
}
/**
* pm_genpd_prepare - Start power transition of a device in a PM domain.
* genpd_prepare - Start power transition of a device in a PM domain.
* @dev: Device to start the transition of.
*
* Start a power transition of a device (during a system-wide power transition)
@@ -894,7 +981,7 @@ static bool resume_needed(struct device *dev,
* an object of type struct generic_pm_domain representing a PM domain
* consisting of I/O devices.
*/
static int pm_genpd_prepare(struct device *dev)
static int genpd_prepare(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret;
@@ -921,7 +1008,7 @@ static int pm_genpd_prepare(struct device *dev)
genpd_unlock(genpd);
ret = pm_generic_prepare(dev);
if (ret) {
if (ret < 0) {
genpd_lock(genpd);
genpd->prepared_count--;
@@ -929,7 +1016,8 @@ static int pm_genpd_prepare(struct device *dev)
genpd_unlock(genpd);
}
return ret;
/* Never return 1, as genpd don't cope with the direct_complete path. */
return ret >= 0 ? 0 : ret;
}
/**
@@ -950,7 +1038,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
if (IS_ERR(genpd))
return -EINVAL;
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
return 0;
if (poweroff)
@@ -975,13 +1063,13 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
}
/**
* pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
* genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
* @dev: Device to suspend.
*
* Stop the device and remove power from the domain if all devices in it have
* been stopped.
*/
static int pm_genpd_suspend_noirq(struct device *dev)
static int genpd_suspend_noirq(struct device *dev)
{
dev_dbg(dev, "%s()\n", __func__);
@@ -989,12 +1077,12 @@ static int pm_genpd_suspend_noirq(struct device *dev)
}
/**
* pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
* genpd_resume_noirq - Start of resume of device in an I/O PM domain.
* @dev: Device to resume.
*
* Restore power to the device's PM domain, if necessary, and start the device.
*/
static int pm_genpd_resume_noirq(struct device *dev)
static int genpd_resume_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
@@ -1005,7 +1093,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
return 0;
genpd_lock(genpd);
@@ -1024,7 +1112,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
}
/**
* pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
* genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Carry out a late freeze of a device under the assumption that its
@@ -1032,7 +1120,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_freeze_noirq(struct device *dev)
static int genpd_freeze_noirq(struct device *dev)
{
const struct generic_pm_domain *genpd;
int ret = 0;
@@ -1054,13 +1142,13 @@ static int pm_genpd_freeze_noirq(struct device *dev)
}
/**
* pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
* genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
* @dev: Device to thaw.
*
* Start the device, unless power has been removed from the domain already
* before the system transition.
*/
static int pm_genpd_thaw_noirq(struct device *dev)
static int genpd_thaw_noirq(struct device *dev)
{
const struct generic_pm_domain *genpd;
int ret = 0;
@@ -1081,14 +1169,14 @@ static int pm_genpd_thaw_noirq(struct device *dev)
}
/**
* pm_genpd_poweroff_noirq - Completion of hibernation of device in an
* genpd_poweroff_noirq - Completion of hibernation of device in an
* I/O PM domain.
* @dev: Device to poweroff.
*
* Stop the device and remove power from the domain if all devices in it have
* been stopped.
*/
static int pm_genpd_poweroff_noirq(struct device *dev)
static int genpd_poweroff_noirq(struct device *dev)
{
dev_dbg(dev, "%s()\n", __func__);
@@ -1096,13 +1184,13 @@ static int pm_genpd_poweroff_noirq(struct device *dev)
}
/**
* pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain.
* genpd_restore_noirq - Start of restore of device in an I/O PM domain.
* @dev: Device to resume.
*
* Make sure the domain will be in the same power state as before the
* hibernation the system is resuming from and start the device if necessary.
*/
static int pm_genpd_restore_noirq(struct device *dev)
static int genpd_restore_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
@@ -1139,7 +1227,7 @@ static int pm_genpd_restore_noirq(struct device *dev)
}
/**
* pm_genpd_complete - Complete power transition of a device in a power domain.
* genpd_complete - Complete power transition of a device in a power domain.
* @dev: Device to complete the transition of.
*
* Complete a power transition of a device (during a system-wide power
@@ -1147,7 +1235,7 @@ static int pm_genpd_restore_noirq(struct device *dev)
* domain member of an object of type struct generic_pm_domain representing
* a power domain consisting of I/O devices.
*/
static void pm_genpd_complete(struct device *dev)
static void genpd_complete(struct device *dev)
{
struct generic_pm_domain *genpd;
@@ -1180,7 +1268,7 @@ static void genpd_syscore_switch(struct device *dev, bool suspend)
struct generic_pm_domain *genpd;
genpd = dev_to_genpd(dev);
if (!pm_genpd_present(genpd))
if (!genpd_present(genpd))
return;
if (suspend) {
@@ -1206,14 +1294,14 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
#else /* !CONFIG_PM_SLEEP */
#define pm_genpd_prepare NULL
#define pm_genpd_suspend_noirq NULL
#define pm_genpd_resume_noirq NULL
#define pm_genpd_freeze_noirq NULL
#define pm_genpd_thaw_noirq NULL
#define pm_genpd_poweroff_noirq NULL
#define pm_genpd_restore_noirq NULL
#define pm_genpd_complete NULL
#define genpd_prepare NULL
#define genpd_suspend_noirq NULL
#define genpd_resume_noirq NULL
#define genpd_freeze_noirq NULL
#define genpd_thaw_noirq NULL
#define genpd_poweroff_noirq NULL
#define genpd_restore_noirq NULL
#define genpd_complete NULL
#endif /* CONFIG_PM_SLEEP */
@@ -1239,7 +1327,7 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
gpd_data->base.dev = dev;
gpd_data->td.constraint_changed = true;
gpd_data->td.effective_constraint_ns = -1;
gpd_data->td.effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
spin_lock_irq(&dev->power.lock);
@@ -1574,14 +1662,14 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
genpd->accounting_time = ktime_get();
genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;
genpd->domain.ops.runtime_resume = genpd_runtime_resume;
genpd->domain.ops.prepare = pm_genpd_prepare;
genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq;
genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
genpd->domain.ops.poweroff_noirq = pm_genpd_poweroff_noirq;
genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
genpd->domain.ops.complete = pm_genpd_complete;
genpd->domain.ops.prepare = genpd_prepare;
genpd->domain.ops.suspend_noirq = genpd_suspend_noirq;
genpd->domain.ops.resume_noirq = genpd_resume_noirq;
genpd->domain.ops.freeze_noirq = genpd_freeze_noirq;
genpd->domain.ops.thaw_noirq = genpd_thaw_noirq;
genpd->domain.ops.poweroff_noirq = genpd_poweroff_noirq;
genpd->domain.ops.restore_noirq = genpd_restore_noirq;
genpd->domain.ops.complete = genpd_complete;
if (genpd->flags & GENPD_FLAG_PM_CLK) {
genpd->dev_ops.stop = pm_clk_suspend;
@@ -1795,7 +1883,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
mutex_lock(&gpd_list_lock);
if (pm_genpd_present(genpd)) {
if (genpd_present(genpd)) {
ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
if (!ret) {
genpd->provider = &np->fwnode;
@@ -1831,7 +1919,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
for (i = 0; i < data->num_domains; i++) {
if (!data->domains[i])
continue;
if (!pm_genpd_present(data->domains[i]))
if (!genpd_present(data->domains[i]))
goto error;
data->domains[i]->provider = &np->fwnode;
@@ -2274,7 +2362,7 @@ EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/kobject.h>
static struct dentry *pm_genpd_debugfs_dir;
static struct dentry *genpd_debugfs_dir;
/*
* TODO: This function is a slightly modified version of rtpm_status_show
@@ -2302,8 +2390,8 @@ static void rtpm_status_str(struct seq_file *s, struct device *dev)
seq_puts(s, p);
}
static int pm_genpd_summary_one(struct seq_file *s,
struct generic_pm_domain *genpd)
static int genpd_summary_one(struct seq_file *s,
struct generic_pm_domain *genpd)
{
static const char * const status_lookup[] = {
[GPD_STATE_ACTIVE] = "on",
@@ -2373,7 +2461,7 @@ static int genpd_summary_show(struct seq_file *s, void *data)
return -ERESTARTSYS;
list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
ret = pm_genpd_summary_one(s, genpd);
ret = genpd_summary_one(s, genpd);
if (ret)
break;
}
@@ -2559,23 +2647,23 @@ define_genpd_debugfs_fops(active_time);
define_genpd_debugfs_fops(total_idle_time);
define_genpd_debugfs_fops(devices);
static int __init pm_genpd_debug_init(void)
static int __init genpd_debug_init(void)
{
struct dentry *d;
struct generic_pm_domain *genpd;
pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
if (!pm_genpd_debugfs_dir)
if (!genpd_debugfs_dir)
return -ENOMEM;
d = debugfs_create_file("pm_genpd_summary", S_IRUGO,
pm_genpd_debugfs_dir, NULL, &genpd_summary_fops);
genpd_debugfs_dir, NULL, &genpd_summary_fops);
if (!d)
return -ENOMEM;
list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
d = debugfs_create_dir(genpd->name, pm_genpd_debugfs_dir);
d = debugfs_create_dir(genpd->name, genpd_debugfs_dir);
if (!d)
return -ENOMEM;
@@ -2595,11 +2683,11 @@ static int __init pm_genpd_debug_init(void)
return 0;
}
late_initcall(pm_genpd_debug_init);
late_initcall(genpd_debug_init);
static void __exit pm_genpd_debug_exit(void)
static void __exit genpd_debug_exit(void)
{
debugfs_remove_recursive(pm_genpd_debugfs_dir);
debugfs_remove_recursive(genpd_debugfs_dir);
}
__exitcall(pm_genpd_debug_exit);
__exitcall(genpd_debug_exit);
#endif /* CONFIG_DEBUG_FS */

73
drivers/base/power/domain_governor.c
View File

@@ -14,23 +14,29 @@
static int dev_update_qos_constraint(struct device *dev, void *data)
{
s64 *constraint_ns_p = data;
s32 constraint_ns = -1;
s64 constraint_ns;
if (dev->power.subsys_data && dev->power.subsys_data->domain_data)
if (dev->power.subsys_data && dev->power.subsys_data->domain_data) {
/*
* Only take suspend-time QoS constraints of devices into
* account, because constraints updated after the device has
* been suspended are not guaranteed to be taken into account
* anyway. In order for them to take effect, the device has to
* be resumed and suspended again.
*/
constraint_ns = dev_gpd_data(dev)->td.effective_constraint_ns;
if (constraint_ns < 0) {
} else {
/*
* The child is not in a domain and there's no info on its
* suspend/resume latencies, so assume them to be negligible and
* take its current PM QoS constraint (that's the only thing
* known at this point anyway).
*/
constraint_ns = dev_pm_qos_read_value(dev);
constraint_ns *= NSEC_PER_USEC;
}
if (constraint_ns == 0)
return 0;
/*
* constraint_ns cannot be negative here, because the device has been
* suspended.
*/
if (constraint_ns < *constraint_ns_p || *constraint_ns_p == 0)
if (constraint_ns < *constraint_ns_p)
*constraint_ns_p = constraint_ns;
return 0;
@@ -58,12 +64,12 @@ static bool default_suspend_ok(struct device *dev)
}
td->constraint_changed = false;
td->cached_suspend_ok = false;
td->effective_constraint_ns = -1;
td->effective_constraint_ns = 0;
constraint_ns = __dev_pm_qos_read_value(dev);
spin_unlock_irqrestore(&dev->power.lock, flags);
if (constraint_ns < 0)
if (constraint_ns == 0)
return false;
constraint_ns *= NSEC_PER_USEC;
@@ -76,14 +82,32 @@ static bool default_suspend_ok(struct device *dev)
device_for_each_child(dev, &constraint_ns,
dev_update_qos_constraint);
if (constraint_ns > 0) {
if (constraint_ns == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS) {
/* "No restriction", so the device is allowed to suspend. */
td->effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
td->cached_suspend_ok = true;
} else if (constraint_ns == 0) {
/*
* This triggers if one of the children that don't belong to a
* domain has a zero PM QoS constraint and it's better not to
* suspend then. effective_constraint_ns is zero already and
* cached_suspend_ok is false, so bail out.
*/
return false;
} else {
constraint_ns -= td->suspend_latency_ns +
td->resume_latency_ns;
if (constraint_ns == 0)
/*
* effective_constraint_ns is zero already and cached_suspend_ok
* is false, so if the computed value is not positive, return
* right away.
*/
if (constraint_ns <= 0)
return false;
td->effective_constraint_ns = constraint_ns;
td->cached_suspend_ok = true;
}
td->effective_constraint_ns = constraint_ns;
td->cached_suspend_ok = constraint_ns >= 0;
/*
* The children have been suspended already, so we don't need to take
@@ -144,18 +168,13 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
*/
td = &to_gpd_data(pdd)->td;
constraint_ns = td->effective_constraint_ns;
/* default_suspend_ok() need not be called before us. */
if (constraint_ns < 0) {
constraint_ns = dev_pm_qos_read_value(pdd->dev);
constraint_ns *= NSEC_PER_USEC;
}
if (constraint_ns == 0)
/*
* Zero means "no suspend at all" and this runs only when all
* devices in the domain are suspended, so it must be positive.
*/
if (constraint_ns == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS)
continue;
/*
* constraint_ns cannot be negative here, because the device has
* been suspended.
*/
if (constraint_ns <= off_on_time_ns)
return false;

23
drivers/base/power/generic_ops.c
View File

@@ -9,7 +9,6 @@
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/export.h>
#include <linux/suspend.h>
#ifdef CONFIG_PM
/**
@@ -298,26 +297,4 @@ void pm_generic_complete(struct device *dev)
if (drv && drv->pm && drv->pm->complete)
drv->pm->complete(dev);
}
/**
* pm_complete_with_resume_check - Complete a device power transition.
* @dev: Device to handle.
*
* Complete a device power transition during a system-wide power transition and
* optionally schedule a runtime resume of the device if the system resume in
* progress has been initated by the platform firmware and the device had its
* power.direct_complete flag set.
*/
void pm_complete_with_resume_check(struct device *dev)
{
pm_generic_complete(dev);
/*
* If the device had been runtime-suspended before the system went into
* the sleep state it is going out of and it has never been resumed till
* now, resume it in case the firmware powered it up.
*/
if (dev->power.direct_complete && pm_resume_via_firmware())
pm_request_resume(dev);
}
EXPORT_SYMBOL_GPL(pm_complete_with_resume_check);
#endif /* CONFIG_PM_SLEEP */

53
drivers/base/power/main.c
View File

@@ -526,7 +526,7 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd)
/*------------------------- Resume routines -------------------------*/
/**
* device_resume_noirq - Execute an "early resume" callback for given device.
* device_resume_noirq - Execute a "noirq resume" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being resumed asynchronously.
@@ -846,16 +846,10 @@ static int device_resume(struct device *dev, pm_message_t state, bool async)
goto Driver;
}
if (dev->class) {
if (dev->class->pm) {
info = "class ";
callback = pm_op(dev->class->pm, state);
goto Driver;
} else if (dev->class->resume) {
info = "legacy class ";
callback = dev->class->resume;
goto End;
}
if (dev->class && dev->class->pm) {
info = "class ";
callback = pm_op(dev->class->pm, state);
goto Driver;
}
if (dev->bus) {
@@ -1081,7 +1075,7 @@ static pm_message_t resume_event(pm_message_t sleep_state)
}
/**
* device_suspend_noirq - Execute a "late suspend" callback for given device.
* __device_suspend_noirq - Execute a "noirq suspend" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1241,7 +1235,7 @@ int dpm_suspend_noirq(pm_message_t state)
}
/**
* device_suspend_late - Execute a "late suspend" callback for given device.
* __device_suspend_late - Execute a "late suspend" callback for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1443,7 +1437,7 @@ static void dpm_clear_suppliers_direct_complete(struct device *dev)
}
/**
* device_suspend - Execute "suspend" callbacks for given device.
* __device_suspend - Execute "suspend" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
* @async: If true, the device is being suspended asynchronously.
@@ -1506,17 +1500,10 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
goto Run;
}
if (dev->class) {
if (dev->class->pm) {
info = "class ";
callback = pm_op(dev->class->pm, state);
goto Run;
} else if (dev->class->suspend) {
pm_dev_dbg(dev, state, "legacy class ");
error = legacy_suspend(dev, state, dev->class->suspend,
"legacy class ");
goto End;
}
if (dev->class && dev->class->pm) {
info = "class ";
callback = pm_op(dev->class->pm, state);
goto Run;
}
if (dev->bus) {
@@ -1663,6 +1650,9 @@ static int device_prepare(struct device *dev, pm_message_t state)
if (dev->power.syscore)
return 0;
WARN_ON(dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) &&
!pm_runtime_enabled(dev));
/*
* If a device's parent goes into runtime suspend at the wrong time,
* it won't be possible to resume the device. To prevent this we
@@ -1711,7 +1701,9 @@ unlock:
* applies to suspend transitions, however.
*/
spin_lock_irq(&dev->power.lock);
dev->power.direct_complete = ret > 0 && state.event == PM_EVENT_SUSPEND;
dev->power.direct_complete = state.event == PM_EVENT_SUSPEND &&
pm_runtime_suspended(dev) && ret > 0 &&
!dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP);
spin_unlock_irq(&dev->power.lock);
return 0;
}
@@ -1860,11 +1852,16 @@ void device_pm_check_callbacks(struct device *dev)
dev->power.no_pm_callbacks =
(!dev->bus || (pm_ops_is_empty(dev->bus->pm) &&
!dev->bus->suspend && !dev->bus->resume)) &&
(!dev->class || (pm_ops_is_empty(dev->class->pm) &&
!dev->class->suspend && !dev->class->resume)) &&
(!dev->class || pm_ops_is_empty(dev->class->pm)) &&
(!dev->type || pm_ops_is_empty(dev->type->pm)) &&
(!dev->pm_domain || pm_ops_is_empty(&dev->pm_domain->ops)) &&
(!dev->driver || (pm_ops_is_empty(dev->driver->pm) &&
!dev->driver->suspend && !dev->driver->resume));
spin_unlock_irq(&dev->power.lock);
}
bool dev_pm_smart_suspend_and_suspended(struct device *dev)
{
return dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) &&
pm_runtime_status_suspended(dev);
}

4
drivers/base/power/opp/Makefile
View File

@@ -1,4 +0,0 @@
ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
obj-y += core.o cpu.o
obj-$(CONFIG_OF) += of.o
obj-$(CONFIG_DEBUG_FS) += debugfs.o

1747
drivers/base/power/opp/core.c
View File

File diff suppressed because it is too large Load Diff

236
drivers/base/power/opp/cpu.c
View File

@@ -1,236 +0,0 @@
/*
* Generic OPP helper interface for CPU device
*
* Copyright (C) 2009-2014 Texas Instruments Incorporated.
* Nishanth Menon
* Romit Dasgupta
* Kevin Hilman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/slab.h>
#include "opp.h"
#ifdef CONFIG_CPU_FREQ
/**
* dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device
* @dev: device for which we do this operation
* @table: Cpufreq table returned back to caller
*
* Generate a cpufreq table for a provided device- this assumes that the
* opp table is already initialized and ready for usage.
*
* This function allocates required memory for the cpufreq table. It is
* expected that the caller does the required maintenance such as freeing
* the table as required.
*
* Returns -EINVAL for bad pointers, -ENODEV if the device is not found, -ENOMEM
* if no memory available for the operation (table is not populated), returns 0
* if successful and table is populated.
*
* WARNING: It is important for the callers to ensure refreshing their copy of
* the table if any of the mentioned functions have been invoked in the interim.
*/
int dev_pm_opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
struct dev_pm_opp *opp;
struct cpufreq_frequency_table *freq_table = NULL;
int i, max_opps, ret = 0;
unsigned long rate;
max_opps = dev_pm_opp_get_opp_count(dev);
if (max_opps <= 0)
return max_opps ? max_opps : -ENODATA;
freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_ATOMIC);
if (!freq_table)
return -ENOMEM;
for (i = 0, rate = 0; i < max_opps; i++, rate++) {
/* find next rate */
opp = dev_pm_opp_find_freq_ceil(dev, &rate);
if (IS_ERR(opp)) {
ret = PTR_ERR(opp);
goto out;
}
freq_table[i].driver_data = i;
freq_table[i].frequency = rate / 1000;
/* Is Boost/turbo opp ? */
if (dev_pm_opp_is_turbo(opp))
freq_table[i].flags = CPUFREQ_BOOST_FREQ;
dev_pm_opp_put(opp);
}
freq_table[i].driver_data = i;
freq_table[i].frequency = CPUFREQ_TABLE_END;
*table = &freq_table[0];
out:
if (ret)
kfree(freq_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table);
/**
* dev_pm_opp_free_cpufreq_table() - free the cpufreq table
* @dev: device for which we do this operation
* @table: table to free
*
* Free up the table allocated by dev_pm_opp_init_cpufreq_table
*/
void dev_pm_opp_free_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
if (!table)
return;
kfree(*table);
*table = NULL;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
#endif /* CONFIG_CPU_FREQ */
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of)
{
struct device *cpu_dev;
int cpu;
WARN_ON(cpumask_empty(cpumask));
for_each_cpu(cpu, cpumask) {
cpu_dev = get_cpu_device(cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
cpu);
continue;
}
if (of)
dev_pm_opp_of_remove_table(cpu_dev);
else
dev_pm_opp_remove_table(cpu_dev);
}
}
/**
* dev_pm_opp_cpumask_remove_table() - Removes OPP table for @cpumask
* @cpumask: cpumask for which OPP table needs to be removed
*
* This removes the OPP tables for CPUs present in the @cpumask.
* This should be used to remove all the OPPs entries associated with
* the cpus in @cpumask.
*/
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
{
_dev_pm_opp_cpumask_remove_table(cpumask, false);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table);
/**
* dev_pm_opp_set_sharing_cpus() - Mark OPP table as shared by few CPUs
* @cpu_dev: CPU device for which we do this operation
* @cpumask: cpumask of the CPUs which share the OPP table with @cpu_dev
*
* This marks OPP table of the @cpu_dev as shared by the CPUs present in
* @cpumask.
*
* Returns -ENODEV if OPP table isn't already present.
*/
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev,
const struct cpumask *cpumask)
{
struct opp_device *opp_dev;
struct opp_table *opp_table;
struct device *dev;
int cpu, ret = 0;
opp_table = _find_opp_table(cpu_dev);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
for_each_cpu(cpu, cpumask) {
if (cpu == cpu_dev->id)
continue;
dev = get_cpu_device(cpu);
if (!dev) {
dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
__func__, cpu);
continue;
}
opp_dev = _add_opp_dev(dev, opp_table);
if (!opp_dev) {
dev_err(dev, "%s: failed to add opp-dev for cpu%d device\n",
__func__, cpu);
continue;
}
/* Mark opp-table as multiple CPUs are sharing it now */
opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
}
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);
/**
* dev_pm_opp_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with @cpu_dev
* @cpu_dev: CPU device for which we do this operation
* @cpumask: cpumask to update with information of sharing CPUs
*
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
*
* Returns -ENODEV if OPP table isn't already present and -EINVAL if the OPP
* table's status is access-unknown.
*/
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
struct opp_device *opp_dev;
struct opp_table *opp_table;
int ret = 0;
opp_table = _find_opp_table(cpu_dev);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
if (opp_table->shared_opp == OPP_TABLE_ACCESS_UNKNOWN) {
ret = -EINVAL;
goto put_opp_table;
}
cpumask_clear(cpumask);
if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
list_for_each_entry(opp_dev, &opp_table->dev_list, node)
cpumask_set_cpu(opp_dev->dev->id, cpumask);
} else {
cpumask_set_cpu(cpu_dev->id, cpumask);
}
put_opp_table:
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_sharing_cpus);

249
drivers/base/power/opp/debugfs.c
View File

@@ -1,249 +0,0 @@
/*
* Generic OPP debugfs interface
*
* Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/limits.h>
#include <linux/slab.h>
#include "opp.h"
static struct dentry *rootdir;
static void opp_set_dev_name(const struct device *dev, char *name)
{
if (dev->parent)
snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent),
dev_name(dev));
else
snprintf(name, NAME_MAX, "%s", dev_name(dev));
}
void opp_debug_remove_one(struct dev_pm_opp *opp)
{
debugfs_remove_recursive(opp->dentry);
}
static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
struct opp_table *opp_table,
struct dentry *pdentry)
{
struct dentry *d;
int i;
char *name;
for (i = 0; i < opp_table->regulator_count; i++) {
name = kasprintf(GFP_KERNEL, "supply-%d", i);
/* Create per-opp directory */
d = debugfs_create_dir(name, pdentry);
kfree(name);
if (!d)
return false;
if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d,
&opp->supplies[i].u_volt))
return false;
if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d,
&opp->supplies[i].u_volt_min))
return false;
if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d,
&opp->supplies[i].u_volt_max))
return false;
if (!debugfs_create_ulong("u_amp", S_IRUGO, d,
&opp->supplies[i].u_amp))
return false;
}
return true;
}
int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
{
struct dentry *pdentry = opp_table->dentry;
struct dentry *d;
char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */
/* Rate is unique to each OPP, use it to give opp-name */
snprintf(name, sizeof(name), "opp:%lu", opp->rate);
/* Create per-opp directory */
d = debugfs_create_dir(name, pdentry);
if (!d)
return -ENOMEM;
if (!debugfs_create_bool("available", S_IRUGO, d, &opp->available))
return -ENOMEM;
if (!debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic))
return -ENOMEM;
if (!debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo))
return -ENOMEM;
if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend))
return -ENOMEM;
if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
return -ENOMEM;
if (!opp_debug_create_supplies(opp, opp_table, d))
return -ENOMEM;
if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
&opp->clock_latency_ns))
return -ENOMEM;
opp->dentry = d;
return 0;
}
static int opp_list_debug_create_dir(struct opp_device *opp_dev,
struct opp_table *opp_table)
{
const struct device *dev = opp_dev->dev;
struct dentry *d;
opp_set_dev_name(dev, opp_table->dentry_name);
/* Create device specific directory */
d = debugfs_create_dir(opp_table->dentry_name, rootdir);
if (!d) {
dev_err(dev, "%s: Failed to create debugfs dir\n", __func__);
return -ENOMEM;
}
opp_dev->dentry = d;
opp_table->dentry = d;
return 0;
}
static int opp_list_debug_create_link(struct opp_device *opp_dev,
struct opp_table *opp_table)
{
const struct device *dev = opp_dev->dev;
char name[NAME_MAX];
struct dentry *d;
opp_set_dev_name(opp_dev->dev, name);
/* Create device specific directory link */
d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name);
if (!d) {
dev_err(dev, "%s: Failed to create link\n", __func__);
return -ENOMEM;
}
opp_dev->dentry = d;
return 0;
}
/**
* opp_debug_register - add a device opp node to the debugfs 'opp' directory
* @opp_dev: opp-dev pointer for device
* @opp_table: the device-opp being added
*
* Dynamically adds device specific directory in debugfs 'opp' directory. If the
* device-opp is shared with other devices, then links will be created for all
* devices except the first.
*
* Return: 0 on success, otherwise negative error.
*/
int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
{
if (!rootdir) {
pr_debug("%s: Uninitialized rootdir\n", __func__);
return -EINVAL;
}
if (opp_table->dentry)
return opp_list_debug_create_link(opp_dev, opp_table);
return opp_list_debug_create_dir(opp_dev, opp_table);
}
static void opp_migrate_dentry(struct opp_device *opp_dev,
struct opp_table *opp_table)
{
struct opp_device *new_dev;
const struct device *dev;
struct dentry *dentry;
/* Look for next opp-dev */
list_for_each_entry(new_dev, &opp_table->dev_list, node)
if (new_dev != opp_dev)
break;
/* new_dev is guaranteed to be valid here */
dev = new_dev->dev;
debugfs_remove_recursive(new_dev->dentry);
opp_set_dev_name(dev, opp_table->dentry_name);
dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,
opp_table->dentry_name);
if (!dentry) {
dev_err(dev, "%s: Failed to rename link from: %s to %s\n",
__func__, dev_name(opp_dev->dev), dev_name(dev));
return;
}
new_dev->dentry = dentry;
opp_table->dentry = dentry;
}
/**
* opp_debug_unregister - remove a device opp node from debugfs opp directory
* @opp_dev: opp-dev pointer for device
* @opp_table: the device-opp being removed
*
* Dynamically removes device specific directory from debugfs 'opp' directory.
*/
void opp_debug_unregister(struct opp_device *opp_dev,
struct opp_table *opp_table)
{
if (opp_dev->dentry == opp_table->dentry) {
/* Move the real dentry object under another device */
if (!list_is_singular(&opp_table->dev_list)) {
opp_migrate_dentry(opp_dev, opp_table);
goto out;
}
opp_table->dentry = NULL;
}
debugfs_remove_recursive(opp_dev->dentry);
out:
opp_dev->dentry = NULL;
}
static int __init opp_debug_init(void)
{
/* Create /sys/kernel/debug/opp directory */
rootdir = debugfs_create_dir("opp", NULL);
if (!rootdir) {
pr_err("%s: Failed to create root directory\n", __func__);
return -ENOMEM;
}
return 0;
}
core_initcall(opp_debug_init);

633
drivers/base/power/opp/of.c
View File

@@ -1,633 +0,0 @@
/*
* Generic OPP OF helpers
*
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
* Nishanth Menon
* Romit Dasgupta
* Kevin Hilman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "opp.h"
static struct opp_table *_managed_opp(const struct device_node *np)
{
struct opp_table *opp_table, *managed_table = NULL;
mutex_lock(&opp_table_lock);
list_for_each_entry(opp_table, &opp_tables, node) {
if (opp_table->np == np) {
/*
* Multiple devices can point to the same OPP table and
* so will have same node-pointer, np.
*
* But the OPPs will be considered as shared only if the
* OPP table contains a "opp-shared" property.
*/
if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
_get_opp_table_kref(opp_table);
managed_table = opp_table;
}
break;
}
}
mutex_unlock(&opp_table_lock);
return managed_table;
}
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev)
{
struct device_node *np;
/*
* Only required for backward compatibility with v1 bindings, but isn't
* harmful for other cases. And so we do it unconditionally.
*/
np = of_node_get(dev->of_node);
if (np) {
u32 val;
if (!of_property_read_u32(np, "clock-latency", &val))
opp_table->clock_latency_ns_max = val;
of_property_read_u32(np, "voltage-tolerance",
&opp_table->voltage_tolerance_v1);
of_node_put(np);
}
}
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
struct device_node *np)
{
unsigned int count = opp_table->supported_hw_count;
u32 version;
int ret;
if (!opp_table->supported_hw) {
/*
* In the case that no supported_hw has been set by the
* platform but there is an opp-supported-hw value set for
* an OPP then the OPP should not be enabled as there is
* no way to see if the hardware supports it.
*/
if (of_find_property(np, "opp-supported-hw", NULL))
return false;
else
return true;
}
while (count--) {
ret = of_property_read_u32_index(np, "opp-supported-hw", count,
&version);
if (ret) {
dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
__func__, count, ret);
return false;
}
/* Both of these are bitwise masks of the versions */
if (!(version & opp_table->supported_hw[count]))
return false;
}
return true;
}
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
struct opp_table *opp_table)
{
u32 *microvolt, *microamp = NULL;
int supplies, vcount, icount, ret, i, j;
struct property *prop = NULL;
char name[NAME_MAX];
supplies = opp_table->regulator_count ? opp_table->regulator_count : 1;
/* Search for "opp-microvolt-<name>" */
if (opp_table->prop_name) {
snprintf(name, sizeof(name), "opp-microvolt-%s",
opp_table->prop_name);
prop = of_find_property(opp->np, name, NULL);
}
if (!prop) {
/* Search for "opp-microvolt" */
sprintf(name, "opp-microvolt");
prop = of_find_property(opp->np, name, NULL);
/* Missing property isn't a problem, but an invalid entry is */
if (!prop) {
if (!opp_table->regulator_count)
return 0;
dev_err(dev, "%s: opp-microvolt missing although OPP managing regulators\n",
__func__);
return -EINVAL;
}
}
vcount = of_property_count_u32_elems(opp->np, name);
if (vcount < 0) {
dev_err(dev, "%s: Invalid %s property (%d)\n",
__func__, name, vcount);
return vcount;
}
/* There can be one or three elements per supply */
if (vcount != supplies && vcount != supplies * 3) {
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
__func__, name, vcount, supplies);
return -EINVAL;
}
microvolt = kmalloc_array(vcount, sizeof(*microvolt), GFP_KERNEL);
if (!microvolt)
return -ENOMEM;
ret = of_property_read_u32_array(opp->np, name, microvolt, vcount);
if (ret) {
dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret);
ret = -EINVAL;
goto free_microvolt;
}
/* Search for "opp-microamp-<name>" */
prop = NULL;
if (opp_table->prop_name) {
snprintf(name, sizeof(name), "opp-microamp-%s",
opp_table->prop_name);
prop = of_find_property(opp->np, name, NULL);
}
if (!prop) {
/* Search for "opp-microamp" */
sprintf(name, "opp-microamp");
prop = of_find_property(opp->np, name, NULL);
}
if (prop) {
icount = of_property_count_u32_elems(opp->np, name);
if (icount < 0) {
dev_err(dev, "%s: Invalid %s property (%d)\n", __func__,
name, icount);
ret = icount;
goto free_microvolt;
}
if (icount != supplies) {
dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n",
__func__, name, icount, supplies);
ret = -EINVAL;
goto free_microvolt;
}
microamp = kmalloc_array(icount, sizeof(*microamp), GFP_KERNEL);
if (!microamp) {
ret = -EINVAL;
goto free_microvolt;
}
ret = of_property_read_u32_array(opp->np, name, microamp,
icount);
if (ret) {
dev_err(dev, "%s: error parsing %s: %d\n", __func__,
name, ret);
ret = -EINVAL;
goto free_microamp;
}
}
for (i = 0, j = 0; i < supplies; i++) {
opp->supplies[i].u_volt = microvolt[j++];
if (vcount == supplies) {
opp->supplies[i].u_volt_min = opp->supplies[i].u_volt;
opp->supplies[i].u_volt_max = opp->supplies[i].u_volt;
} else {
opp->supplies[i].u_volt_min = microvolt[j++];
opp->supplies[i].u_volt_max = microvolt[j++];
}
if (microamp)
opp->supplies[i].u_amp = microamp[i];
}
free_microamp:
kfree(microamp);
free_microvolt:
kfree(microvolt);
return ret;
}
/**
* dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
* entries
* @dev: device pointer used to lookup OPP table.
*
* Free OPPs created using static entries present in DT.
*/
void dev_pm_opp_of_remove_table(struct device *dev)
{
_dev_pm_opp_find_and_remove_table(dev, false);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
/* Returns opp descriptor node for a device node, caller must
* do of_node_put() */
static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np)
{
/*
* There should be only ONE phandle present in "operating-points-v2"
* property.
*/
return of_parse_phandle(np, "operating-points-v2", 0);
}
/* Returns opp descriptor node for a device, caller must do of_node_put() */
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
{
return _opp_of_get_opp_desc_node(dev->of_node);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
/**
* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
* @opp_table: OPP table
* @dev: device for which we do this operation
* @np: device node
*
* This function adds an opp definition to the opp table and returns status. The
* opp can be controlled using dev_pm_opp_enable/disable functions and may be
* removed by dev_pm_opp_remove.
*
* Return:
* 0 On success OR
* Duplicate OPPs (both freq and volt are same) and opp->available
* -EEXIST Freq are same and volt are different OR
* Duplicate OPPs (both freq and volt are same) and !opp->available
* -ENOMEM Memory allocation failure
* -EINVAL Failed parsing the OPP node
*/
static int _opp_add_static_v2(struct opp_table *opp_table, struct device *dev,
struct device_node *np)
{
struct dev_pm_opp *new_opp;
u64 rate;
u32 val;
int ret;
new_opp = _opp_allocate(opp_table);
if (!new_opp)
return -ENOMEM;
ret = of_property_read_u64(np, "opp-hz", &rate);
if (ret < 0) {
dev_err(dev, "%s: opp-hz not found\n", __func__);
goto free_opp;
}
/* Check if the OPP supports hardware's hierarchy of versions or not */
if (!_opp_is_supported(dev, opp_table, np)) {
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);
goto free_opp;
}
/*
* Rate is defined as an unsigned long in clk API, and so casting
* explicitly to its type. Must be fixed once rate is 64 bit
* guaranteed in clk API.
*/
new_opp->rate = (unsigned long)rate;
new_opp->turbo = of_property_read_bool(np, "turbo-mode");
new_opp->np = np;
new_opp->dynamic = false;
new_opp->available = true;
if (!of_property_read_u32(np, "clock-latency-ns", &val))
new_opp->clock_latency_ns = val;
ret = opp_parse_supplies(new_opp, dev, opp_table);
if (ret)
goto free_opp;
ret = _opp_add(dev, new_opp, opp_table);
if (ret) {
/* Don't return error for duplicate OPPs */
if (ret == -EBUSY)
ret = 0;
goto free_opp;
}
/* OPP to select on device suspend */
if (of_property_read_bool(np, "opp-suspend")) {
if (opp_table->suspend_opp) {
dev_warn(dev, "%s: Multiple suspend OPPs found (%lu %lu)\n",
__func__, opp_table->suspend_opp->rate,
new_opp->rate);
} else {
new_opp->suspend = true;
opp_table->suspend_opp = new_opp;
}
}
if (new_opp->clock_latency_ns > opp_table->clock_latency_ns_max)
opp_table->clock_latency_ns_max = new_opp->clock_latency_ns;
pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
__func__, new_opp->turbo, new_opp->rate,
new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min,
new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns);
/*
* Notify the changes in the availability of the operable
* frequency/voltage list.
*/
blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp);
return 0;
free_opp:
_opp_free(new_opp);
return ret;
}
/* Initializes OPP tables based on new bindings */
static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
{
struct device_node *np;
struct opp_table *opp_table;
int ret = 0, count = 0;
opp_table = _managed_opp(opp_np);
if (opp_table) {
/* OPPs are already managed */
if (!_add_opp_dev(dev, opp_table))
ret = -ENOMEM;
goto put_opp_table;
}
opp_table = dev_pm_opp_get_opp_table(dev);
if (!opp_table)
return -ENOMEM;
/* We have opp-table node now, iterate over it and add OPPs */
for_each_available_child_of_node(opp_np, np) {
count++;
ret = _opp_add_static_v2(opp_table, dev, np);
if (ret) {
dev_err(dev, "%s: Failed to add OPP, %d\n", __func__,
ret);
_dev_pm_opp_remove_table(opp_table, dev, false);
goto put_opp_table;
}
}
/* There should be one of more OPP defined */
if (WARN_ON(!count)) {
ret = -ENOENT;
goto put_opp_table;
}
opp_table->np = opp_np;
if (of_property_read_bool(opp_np, "opp-shared"))
opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
else
opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE;
put_opp_table:
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
/* Initializes OPP tables based on old-deprecated bindings */
static int _of_add_opp_table_v1(struct device *dev)
{
struct opp_table *opp_table;
const struct property *prop;
const __be32 *val;
int nr, ret = 0;
prop = of_find_property(dev->of_node, "operating-points", NULL);
if (!prop)
return -ENODEV;
if (!prop->value)
return -ENODATA;
/*
* Each OPP is a set of tuples consisting of frequency and
* voltage like <freq-kHz vol-uV>.
*/
nr = prop->length / sizeof(u32);
if (nr % 2) {
dev_err(dev, "%s: Invalid OPP table\n", __func__);
return -EINVAL;
}
opp_table = dev_pm_opp_get_opp_table(dev);
if (!opp_table)
return -ENOMEM;
val = prop->value;
while (nr) {
unsigned long freq = be32_to_cpup(val++) * 1000;
unsigned long volt = be32_to_cpup(val++);
ret = _opp_add_v1(opp_table, dev, freq, volt, false);
if (ret) {
dev_err(dev, "%s: Failed to add OPP %ld (%d)\n",
__func__, freq, ret);
_dev_pm_opp_remove_table(opp_table, dev, false);
break;
}
nr -= 2;
}
dev_pm_opp_put_opp_table(opp_table);
return ret;
}
/**
* dev_pm_opp_of_add_table() - Initialize opp table from device tree
* @dev: device pointer used to lookup OPP table.
*
* Register the initial OPP table with the OPP library for given device.
*
* Return:
* 0 On success OR
* Duplicate OPPs (both freq and volt are same) and opp->available
* -EEXIST Freq are same and volt are different OR
* Duplicate OPPs (both freq and volt are same) and !opp->available
* -ENOMEM Memory allocation failure
* -ENODEV when 'operating-points' property is not found or is invalid data
* in device node.
* -ENODATA when empty 'operating-points' property is found
* -EINVAL when invalid entries are found in opp-v2 table
*/
int dev_pm_opp_of_add_table(struct device *dev)
{
struct device_node *opp_np;
int ret;
/*
* OPPs have two version of bindings now. The older one is deprecated,
* try for the new binding first.
*/
opp_np = dev_pm_opp_of_get_opp_desc_node(dev);
if (!opp_np) {
/*
* Try old-deprecated bindings for backward compatibility with
* older dtbs.
*/
return _of_add_opp_table_v1(dev);
}
ret = _of_add_opp_table_v2(dev, opp_np);
of_node_put(opp_np);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
/* CPU device specific helpers */
/**
* dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
* @cpumask: cpumask for which OPP table needs to be removed
*
* This removes the OPP tables for CPUs present in the @cpumask.
* This should be used only to remove static entries created from DT.
*/
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
{
_dev_pm_opp_cpumask_remove_table(cpumask, true);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
/**
* dev_pm_opp_of_cpumask_add_table() - Adds OPP table for @cpumask
* @cpumask: cpumask for which OPP table needs to be added.
*
* This adds the OPP tables for CPUs present in the @cpumask.
*/
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
{
struct device *cpu_dev;
int cpu, ret = 0;
WARN_ON(cpumask_empty(cpumask));
for_each_cpu(cpu, cpumask) {
cpu_dev = get_cpu_device(cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
cpu);
continue;
}
ret = dev_pm_opp_of_add_table(cpu_dev);
if (ret) {
/*
* OPP may get registered dynamically, don't print error
* message here.
*/
pr_debug("%s: couldn't find opp table for cpu:%d, %d\n",
__func__, cpu, ret);
/* Free all other OPPs */
dev_pm_opp_of_cpumask_remove_table(cpumask);
break;
}
}
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
/*
* Works only for OPP v2 bindings.
*
* Returns -ENOENT if operating-points-v2 bindings aren't supported.
*/
/**
* dev_pm_opp_of_get_sharing_cpus() - Get cpumask of CPUs sharing OPPs with
* @cpu_dev using operating-points-v2
* bindings.
*
* @cpu_dev: CPU device for which we do this operation
* @cpumask: cpumask to update with information of sharing CPUs
*
* This updates the @cpumask with CPUs that are sharing OPPs with @cpu_dev.
*
* Returns -ENOENT if operating-points-v2 isn't present for @cpu_dev.
*/
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
struct cpumask *cpumask)
{
struct device_node *np, *tmp_np, *cpu_np;
int cpu, ret = 0;
/* Get OPP descriptor node */
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np) {
dev_dbg(cpu_dev, "%s: Couldn't find opp node.\n", __func__);
return -ENOENT;
}
cpumask_set_cpu(cpu_dev->id, cpumask);
/* OPPs are shared ? */
if (!of_property_read_bool(np, "opp-shared"))
goto put_cpu_node;
for_each_possible_cpu(cpu) {
if (cpu == cpu_dev->id)
continue;
cpu_np = of_get_cpu_node(cpu, NULL);
if (!cpu_np) {
dev_err(cpu_dev, "%s: failed to get cpu%d node\n",
__func__, cpu);
ret = -ENOENT;
goto put_cpu_node;
}
/* Get OPP descriptor node */
tmp_np = _opp_of_get_opp_desc_node(cpu_np);
if (!tmp_np) {
pr_err("%pOF: Couldn't find opp node\n", cpu_np);
ret = -ENOENT;
goto put_cpu_node;
}
/* CPUs are sharing opp node */
if (np == tmp_np)
cpumask_set_cpu(cpu, cpumask);
of_node_put(tmp_np);
}
put_cpu_node:
of_node_put(np);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus);

222
drivers/base/power/opp/opp.h
View File

@@ -1,222 +0,0 @@
/*
* Generic OPP Interface
*
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
* Nishanth Menon
* Romit Dasgupta
* Kevin Hilman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __DRIVER_OPP_H__
#define __DRIVER_OPP_H__
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/limits.h>
#include <linux/pm_opp.h>
#include <linux/notifier.h>
struct clk;
struct regulator;
/* Lock to allow exclusive modification to the device and opp lists */
extern struct mutex opp_table_lock;
extern struct list_head opp_tables;
/*
* Internal data structure organization with the OPP layer library is as
* follows:
* opp_tables (root)
* |- device 1 (represents voltage domain 1)
* | |- opp 1 (availability, freq, voltage)
* | |- opp 2 ..
* ... ...
* | `- opp n ..
* |- device 2 (represents the next voltage domain)
* ...
* `- device m (represents mth voltage domain)
* device 1, 2.. are represented by opp_table structure while each opp
* is represented by the opp structure.
*/
/**
* struct dev_pm_opp - Generic OPP description structure
* @node: opp table node. The nodes are maintained throughout the lifetime
* of boot. It is expected only an optimal set of OPPs are
* added to the library by the SoC framework.
* IMPORTANT: the opp nodes should be maintained in increasing
* order.
* @kref: for reference count of the OPP.
* @available: true/false - marks if this OPP as available or not
* @dynamic: not-created from static DT entries.
* @turbo: true if turbo (boost) OPP
* @suspend: true if suspend OPP
* @rate: Frequency in hertz
* @supplies: Power supplies voltage/current values
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
* frequency from any other OPP's frequency.
* @opp_table: points back to the opp_table struct this opp belongs to
* @np: OPP's device node.
* @dentry: debugfs dentry pointer (per opp)
*
* This structure stores the OPP information for a given device.
*/
struct dev_pm_opp {
struct list_head node;
struct kref kref;
bool available;
bool dynamic;
bool turbo;
bool suspend;
unsigned long rate;
struct dev_pm_opp_supply *supplies;
unsigned long clock_latency_ns;
struct opp_table *opp_table;
struct device_node *np;
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
#endif
};
/**
* struct opp_device - devices managed by 'struct opp_table'
* @node: list node
* @dev: device to which the struct object belongs
* @dentry: debugfs dentry pointer (per device)
*
* This is an internal data structure maintaining the devices that are managed
* by 'struct opp_table'.
*/
struct opp_device {
struct list_head node;
const struct device *dev;
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
#endif
};
enum opp_table_access {
OPP_TABLE_ACCESS_UNKNOWN = 0,
OPP_TABLE_ACCESS_EXCLUSIVE = 1,
OPP_TABLE_ACCESS_SHARED = 2,
};
/**
* struct opp_table - Device opp structure
* @node: table node - contains the devices with OPPs that
* have been registered. Nodes once added are not modified in this
* table.
* @head: notifier head to notify the OPP availability changes.
* @dev_list: list of devices that share these OPPs
* @opp_list: table of opps
* @kref: for reference count of the table.
* @lock: mutex protecting the opp_list.
* @np: struct device_node pointer for opp's DT node.
* @clock_latency_ns_max: Max clock latency in nanoseconds.
* @shared_opp: OPP is shared between multiple devices.
* @suspend_opp: Pointer to OPP to be used during device suspend.
* @supported_hw: Array of version number to support.
* @supported_hw_count: Number of elements in supported_hw array.
* @prop_name: A name to postfix to many DT properties, while parsing them.
* @clk: Device's clock handle
* @regulators: Supply regulators
* @regulator_count: Number of power supply regulators
* @set_opp: Platform specific set_opp callback
* @set_opp_data: Data to be passed to set_opp callback
* @dentry: debugfs dentry pointer of the real device directory (not links).
* @dentry_name: Name of the real dentry.
*
* @voltage_tolerance_v1: In percentage, for v1 bindings only.
*
* This is an internal data structure maintaining the link to opps attached to
* a device. This structure is not meant to be shared to users as it is
* meant for book keeping and private to OPP library.
*/
struct opp_table {
struct list_head node;
struct blocking_notifier_head head;
struct list_head dev_list;
struct list_head opp_list;
struct kref kref;
struct mutex lock;
struct device_node *np;
unsigned long clock_latency_ns_max;
/* For backward compatibility with v1 bindings */
unsigned int voltage_tolerance_v1;
enum opp_table_access shared_opp;
struct dev_pm_opp *suspend_opp;
unsigned int *supported_hw;
unsigned int supported_hw_count;
const char *prop_name;
struct clk *clk;
struct regulator **regulators;
unsigned int regulator_count;
int (*set_opp)(struct dev_pm_set_opp_data *data);
struct dev_pm_set_opp_data *set_opp_data;
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
char dentry_name[NAME_MAX];
#endif
};
/* Routines internal to opp core */
void _get_opp_table_kref(struct opp_table *opp_table);
struct opp_table *_find_opp_table(struct device *dev);
struct opp_device *_add_opp_dev(const struct device *dev, struct opp_table *opp_table);
void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, bool remove_all);
void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all);
struct dev_pm_opp *_opp_allocate(struct opp_table *opp_table);
void _opp_free(struct dev_pm_opp *opp);
int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *opp_table);
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of);
struct opp_table *_add_opp_table(struct device *dev);
#ifdef CONFIG_OF
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev);
#else
static inline void _of_init_opp_table(struct opp_table *opp_table, struct device *dev) {}
#endif
#ifdef CONFIG_DEBUG_FS
void opp_debug_remove_one(struct dev_pm_opp *opp);
int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table);
int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table);
void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table);
#else
static inline void opp_debug_remove_one(struct dev_pm_opp *opp) {}
static inline int opp_debug_create_one(struct dev_pm_opp *opp,
struct opp_table *opp_table)
{ return 0; }
static inline int opp_debug_register(struct opp_device *opp_dev,
struct opp_table *opp_table)
{ return 0; }
static inline void opp_debug_unregister(struct opp_device *opp_dev,
struct opp_table *opp_table)
{ }
#endif /* DEBUG_FS */
#endif /* __DRIVER_OPP_H__ */

5
drivers/base/power/qos.c
View File

@@ -139,6 +139,9 @@ static int apply_constraint(struct dev_pm_qos_request *req,
switch(req->type) {
case DEV_PM_QOS_RESUME_LATENCY:
if (WARN_ON(action != PM_QOS_REMOVE_REQ && value < 0))
value = 0;
ret = pm_qos_update_target(&qos->resume_latency,
&req->data.pnode, action, value);
break;
@@ -189,7 +192,7 @@ static int dev_pm_qos_constraints_allocate(struct device *dev)
plist_head_init(&c->list);
c->target_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE;
c->default_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE;
c->no_constraint_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE;
c->no_constraint_value = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
c->type = PM_QOS_MIN;
c->notifiers = n;

9
drivers/base/power/runtime.c
View File

@@ -253,7 +253,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
|| (dev->power.request_pending
&& dev->power.request == RPM_REQ_RESUME))
retval = -EAGAIN;
else if (__dev_pm_qos_read_value(dev) < 0)
else if (__dev_pm_qos_read_value(dev) == 0)
retval = -EPERM;
else if (dev->power.runtime_status == RPM_SUSPENDED)
retval = 1;
@@ -894,9 +894,9 @@ static void pm_runtime_work(struct work_struct *work)
*
* Check if the time is right and queue a suspend request.
*/
static void pm_suspend_timer_fn(unsigned long data)
static void pm_suspend_timer_fn(struct timer_list *t)
{
struct device *dev = (struct device *)data;
struct device *dev = from_timer(dev, t, power.suspend_timer);
unsigned long flags;
unsigned long expires;
@@ -1499,8 +1499,7 @@ void pm_runtime_init(struct device *dev)
INIT_WORK(&dev->power.work, pm_runtime_work);
dev->power.timer_expires = 0;
setup_timer(&dev->power.suspend_timer, pm_suspend_timer_fn,
(unsigned long)dev);
timer_setup(&dev->power.suspend_timer, pm_suspend_timer_fn, 0);
init_waitqueue_head(&dev->power.wait_queue);
}

53
drivers/base/power/sysfs.c
View File

@@ -218,7 +218,14 @@ static ssize_t pm_qos_resume_latency_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", dev_pm_qos_requested_resume_latency(dev));
s32 value = dev_pm_qos_requested_resume_latency(dev);
if (value == 0)
return sprintf(buf, "n/a\n");
else if (value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
value = 0;
return sprintf(buf, "%d\n", value);
}
static ssize_t pm_qos_resume_latency_store(struct device *dev,
@@ -228,11 +235,21 @@ static ssize_t pm_qos_resume_latency_store(struct device *dev,
s32 value;
int ret;
if (kstrtos32(buf, 0, &value))
return -EINVAL;
if (!kstrtos32(buf, 0, &value)) {
/*
* Prevent users from writing negative or "no constraint" values
* directly.
*/
if (value < 0 || value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
return -EINVAL;
if (value < 0)
if (value == 0)
value = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
} else if (!strcmp(buf, "n/a") || !strcmp(buf, "n/a\n")) {
value = 0;
} else {
return -EINVAL;
}
ret = dev_pm_qos_update_request(dev->power.qos->resume_latency_req,
value);
@@ -309,33 +326,6 @@ static ssize_t pm_qos_no_power_off_store(struct device *dev,
static DEVICE_ATTR(pm_qos_no_power_off, 0644,
pm_qos_no_power_off_show, pm_qos_no_power_off_store);
static ssize_t pm_qos_remote_wakeup_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
& PM_QOS_FLAG_REMOTE_WAKEUP));
}
static ssize_t pm_qos_remote_wakeup_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t n)
{
int ret;
if (kstrtoint(buf, 0, &ret))
return -EINVAL;
if (ret != 0 && ret != 1)
return -EINVAL;
ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret);
return ret < 0 ? ret : n;
}
static DEVICE_ATTR(pm_qos_remote_wakeup, 0644,
pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store);
#ifdef CONFIG_PM_SLEEP
static const char _enabled[] = "enabled";
static const char _disabled[] = "disabled";
@@ -671,7 +661,6 @@ static const struct attribute_group pm_qos_latency_tolerance_attr_group = {
static struct attribute *pm_qos_flags_attrs[] = {
&dev_attr_pm_qos_no_power_off.attr,
&dev_attr_pm_qos_remote_wakeup.attr,
NULL,
};
static const struct attribute_group pm_qos_flags_attr_group = {

11
drivers/base/power/wakeup.c
View File

@@ -54,7 +54,7 @@ static unsigned int saved_count;
static DEFINE_SPINLOCK(events_lock);
static void pm_wakeup_timer_fn(unsigned long data);
static void pm_wakeup_timer_fn(struct timer_list *t);
static LIST_HEAD(wakeup_sources);
@@ -176,7 +176,7 @@ void wakeup_source_add(struct wakeup_source *ws)
return;
spin_lock_init(&ws->lock);
setup_timer(&ws->timer, pm_wakeup_timer_fn, (unsigned long)ws);
timer_setup(&ws->timer, pm_wakeup_timer_fn, 0);
ws->active = false;
ws->last_time = ktime_get();
@@ -481,8 +481,7 @@ static bool wakeup_source_not_registered(struct wakeup_source *ws)
* Use timer struct to check if the given source is initialized
* by wakeup_source_add.
*/
return ws->timer.function != pm_wakeup_timer_fn ||
ws->timer.data != (unsigned long)ws;
return ws->timer.function != (TIMER_FUNC_TYPE)pm_wakeup_timer_fn;
}
/*
@@ -724,9 +723,9 @@ EXPORT_SYMBOL_GPL(pm_relax);
* in @data if it is currently active and its timer has not been canceled and
* the expiration time of the timer is not in future.
*/
static void pm_wakeup_timer_fn(unsigned long data)
static void pm_wakeup_timer_fn(struct timer_list *t)
{
struct wakeup_source *ws = (struct wakeup_source *)data;
struct wakeup_source *ws = from_timer(ws, t, timer);
unsigned long flags;
spin_lock_irqsave(&ws->lock, flags);