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Merge branches 'pm-sleep', 'pm-domains' and 'pm-avs' 

* pm-sleep:
  PM / suspend: make sync() on suspend-to-RAM build-time optional
  PM / sleep: Allow devices without runtime PM to do direct-complete
  PM / autosleep: Use workqueue for user space wakeup sources garbage collector

* pm-domains:
  PM / Domains: Fix typo in description of genpd_dev_pm_detach()
  PM / Domains: Remove unusable governor dummies
  PM / Domains: Make pm_genpd_init() available to modules
  PM / domains: Align column headers and data in pm_genpd_summary output
  PM / Domains: Return -EPROBE_DEFER if we fail to init or turn-on domain
  PM / Domains: Correct unit address in power-controller example
  PM / Domains: Remove intermediate states from the power off sequence

* pm-avs:
  PM / AVS: rockchip-io: add io selectors and supplies for rk3368
  PM / AVS: rockchip-io: depend on CONFIG_POWER_AVS
This commit is contained in:
Rafael J. Wysocki 2015-09-01 15:54:20 +02:00
parent 5cf896b3c7 2fd77fff4b 8bb6944e5a 3fc147e915
commit 56963d99b7
13 changed files with 187 additions and 336 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/power/power_domain.txt
View File

@ -48,7 +48,7 @@ Example 2:
#power-domain-cells = <1>;
};
child: power-controller@12340000 {
child: power-controller@12341000 {
compatible = "foo,power-controller";
reg = <0x12341000 0x1000>;
power-domains = <&parent 0>;

14
Documentation/devicetree/bindings/power/rockchip-io-domain.txt
View File

@ -33,6 +33,8 @@ Required properties:
- compatible: should be one of:
- "rockchip,rk3188-io-voltage-domain" for rk3188
- "rockchip,rk3288-io-voltage-domain" for rk3288
- "rockchip,rk3368-io-voltage-domain" for rk3368
- "rockchip,rk3368-pmu-io-voltage-domain" for rk3368 pmu-domains
- rockchip,grf: phandle to the syscon managing the "general register files"
@ -64,6 +66,18 @@ Possible supplies for rk3288:
- sdcard-supply: The supply connected to SDMMC0_VDD.
- wifi-supply: The supply connected to APIO3_VDD. Also known as SDIO0.
Possible supplies for rk3368:
- audio-supply: The supply connected to APIO3_VDD.
- dvp-supply: The supply connected to DVPIO_VDD.
- flash0-supply: The supply connected to FLASH0_VDD. Typically for eMMC
- gpio30-supply: The supply connected to APIO1_VDD.
- gpio1830 The supply connected to APIO4_VDD.
- sdcard-supply: The supply connected to SDMMC0_VDD.
- wifi-supply: The supply connected to APIO2_VDD. Also known as SDIO0.
Possible supplies for rk3368 pmu-domains:
- pmu-supply: The supply connected to PMUIO_VDD.
- vop-supply: The supply connected to LCDC_VDD.
Example:

7
Documentation/power/devices.txt
View File

@ -341,6 +341,13 @@ the phases are:
and is entirely responsible for bringing the device back to the
functional state as appropriate.
Note that this direct-complete procedure applies even if the device is
disabled for runtime PM; only the runtime-PM status matters. It follows
that if a device has system-sleep callbacks but does not support runtime
PM, then its prepare callback must never return a positive value. This
is because all devices are initially set to runtime-suspended with
runtime PM disabled.
2. The suspend methods should quiesce the device to stop it from performing
I/O. They also may save the device registers and put it into the
appropriate low-power state, depending on the bus type the device is on,

4
Documentation/power/runtime_pm.txt
View File

@ -445,10 +445,6 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
bool pm_runtime_status_suspended(struct device *dev);
- return true if the device's runtime PM status is 'suspended'
bool pm_runtime_suspended_if_enabled(struct device *dev);
- return true if the device's runtime PM status is 'suspended' and its
'power.disable_depth' field is equal to 1
void pm_runtime_allow(struct device *dev);
- set the power.runtime_auto flag for the device and decrease its usage
counter (used by the /sys/devices/.../power/control interface to

388
drivers/base/power/domain.c
View File

@ -114,8 +114,12 @@ static int genpd_stop_dev(struct generic_pm_domain *genpd, struct device *dev)
stop_latency_ns, "stop");
}
static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev)
static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev,
bool timed)
{
if (!timed)
return GENPD_DEV_CALLBACK(genpd, int, start, dev);
return GENPD_DEV_TIMED_CALLBACK(genpd, int, start, dev,
start_latency_ns, "start");
}
@ -136,41 +140,6 @@ static void genpd_sd_counter_inc(struct generic_pm_domain *genpd)
smp_mb__after_atomic();
}
static void genpd_acquire_lock(struct generic_pm_domain *genpd)
{
DEFINE_WAIT(wait);
mutex_lock(&genpd->lock);
/*
* Wait for the domain to transition into either the active,
* or the power off state.
*/
for (;;) {
prepare_to_wait(&genpd->status_wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
if (genpd->status == GPD_STATE_ACTIVE
|| genpd->status == GPD_STATE_POWER_OFF)
break;
mutex_unlock(&genpd->lock);
schedule();
mutex_lock(&genpd->lock);
}
finish_wait(&genpd->status_wait_queue, &wait);
}
static void genpd_release_lock(struct generic_pm_domain *genpd)
{
mutex_unlock(&genpd->lock);
}
static void genpd_set_active(struct generic_pm_domain *genpd)
{
if (genpd->resume_count == 0)
genpd->status = GPD_STATE_ACTIVE;
}
static void genpd_recalc_cpu_exit_latency(struct generic_pm_domain *genpd)
{
s64 usecs64;
@ -251,35 +220,14 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed)
* resume a device belonging to it.
*/
static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct gpd_link *link;
DEFINE_WAIT(wait);
int ret = 0;
/* If the domain's master is being waited for, we have to wait too. */
for (;;) {
prepare_to_wait(&genpd->status_wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
if (genpd->status != GPD_STATE_WAIT_MASTER)
break;
mutex_unlock(&genpd->lock);
schedule();
mutex_lock(&genpd->lock);
}
finish_wait(&genpd->status_wait_queue, &wait);
if (genpd->status == GPD_STATE_ACTIVE
|| (genpd->prepared_count > 0 && genpd->suspend_power_off))
return 0;
if (genpd->status != GPD_STATE_POWER_OFF) {
genpd_set_active(genpd);
return 0;
}
if (genpd->cpuidle_data) {
cpuidle_pause_and_lock();
genpd->cpuidle_data->idle_state->disabled = true;
@ -294,20 +242,8 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
*/
list_for_each_entry(link, &genpd->slave_links, slave_node) {
genpd_sd_counter_inc(link->master);
genpd->status = GPD_STATE_WAIT_MASTER;
mutex_unlock(&genpd->lock);
ret = pm_genpd_poweron(link->master);
mutex_lock(&genpd->lock);
/*
* The "wait for parent" status is guaranteed not to change
* while the master is powering on.
*/
genpd->status = GPD_STATE_POWER_OFF;
wake_up_all(&genpd->status_wait_queue);
if (ret) {
genpd_sd_counter_dec(link->master);
goto err;
@ -319,8 +255,7 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
goto err;
out:
genpd_set_active(genpd);
genpd->status = GPD_STATE_ACTIVE;
return 0;
err:
@ -356,20 +291,18 @@ int pm_genpd_name_poweron(const char *domain_name)
return genpd ? pm_genpd_poweron(genpd) : -EINVAL;
}
static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd,
struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, int, start, dev);
}
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{
return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev,
save_state_latency_ns, "state save");
}
static int genpd_restore_dev(struct generic_pm_domain *genpd, struct device *dev)
static int genpd_restore_dev(struct generic_pm_domain *genpd,
struct device *dev, bool timed)
{
if (!timed)
return GENPD_DEV_CALLBACK(genpd, int, restore_state, dev);
return GENPD_DEV_TIMED_CALLBACK(genpd, int, restore_state, dev,
restore_state_latency_ns,
"state restore");
@ -415,89 +348,6 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
return NOTIFY_DONE;
}
/**
* __pm_genpd_save_device - Save the pre-suspend state of a device.
* @pdd: Domain data of the device to save the state of.
* @genpd: PM domain the device belongs to.
*/
static int __pm_genpd_save_device(struct pm_domain_data *pdd,
struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd);
struct device *dev = pdd->dev;
int ret = 0;
if (gpd_data->need_restore > 0)
return 0;
/*
* If the value of the need_restore flag is still unknown at this point,
* we trust that pm_genpd_poweroff() has verified that the device is
* already runtime PM suspended.
*/
if (gpd_data->need_restore < 0) {
gpd_data->need_restore = 1;
return 0;
}
mutex_unlock(&genpd->lock);
genpd_start_dev(genpd, dev);
ret = genpd_save_dev(genpd, dev);
genpd_stop_dev(genpd, dev);
mutex_lock(&genpd->lock);
if (!ret)
gpd_data->need_restore = 1;
return ret;
}
/**
* __pm_genpd_restore_device - Restore the pre-suspend state of a device.
* @pdd: Domain data of the device to restore the state of.
* @genpd: PM domain the device belongs to.
*/
static void __pm_genpd_restore_device(struct pm_domain_data *pdd,
struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd);
struct device *dev = pdd->dev;
int need_restore = gpd_data->need_restore;
gpd_data->need_restore = 0;
mutex_unlock(&genpd->lock);
genpd_start_dev(genpd, dev);
/*
* Call genpd_restore_dev() for recently added devices too (need_restore
* is negative then).
*/
if (need_restore)
genpd_restore_dev(genpd, dev);
mutex_lock(&genpd->lock);
}
/**
* genpd_abort_poweroff - Check if a PM domain power off should be aborted.
* @genpd: PM domain to check.
*
* Return true if a PM domain's status changed to GPD_STATE_ACTIVE during
* a "power off" operation, which means that a "power on" has occured in the
* meantime, or if its resume_count field is different from zero, which means
* that one of its devices has been resumed in the meantime.
*/
static bool genpd_abort_poweroff(struct generic_pm_domain *genpd)
{
return genpd->status == GPD_STATE_WAIT_MASTER
|| genpd->status == GPD_STATE_ACTIVE || genpd->resume_count > 0;
}
/**
* genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff().
* @genpd: PM domait to power off.
@ -515,34 +365,26 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
* @genpd: PM domain to power down.
*
* If all of the @genpd's devices have been suspended and all of its subdomains
* have been powered down, run the runtime suspend callbacks provided by all of
* the @genpd's devices' drivers and remove power from @genpd.
* have been powered down, remove power from @genpd.
*/
static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct pm_domain_data *pdd;
struct gpd_link *link;
unsigned int not_suspended;
int ret = 0;
unsigned int not_suspended = 0;
start:
/*
* Do not try to power off the domain in the following situations:
* (1) The domain is already in the "power off" state.
* (2) The domain is waiting for its master to power up.
* (3) One of the domain's devices is being resumed right now.
* (4) System suspend is in progress.
* (2) System suspend is in progress.
*/
if (genpd->status == GPD_STATE_POWER_OFF
|| genpd->status == GPD_STATE_WAIT_MASTER
|| genpd->resume_count > 0 || genpd->prepared_count > 0)
|| genpd->prepared_count > 0)
return 0;
if (atomic_read(&genpd->sd_count) > 0)
return -EBUSY;
not_suspended = 0;
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
enum pm_qos_flags_status stat;
@ -560,41 +402,11 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
if (not_suspended > genpd->in_progress)
return -EBUSY;
if (genpd->poweroff_task) {
/*
* Another instance of pm_genpd_poweroff() is executing
* callbacks, so tell it to start over and return.
*/
genpd->status = GPD_STATE_REPEAT;
return 0;
}
if (genpd->gov && genpd->gov->power_down_ok) {
if (!genpd->gov->power_down_ok(&genpd->domain))
return -EAGAIN;
}
genpd->status = GPD_STATE_BUSY;
genpd->poweroff_task = current;
list_for_each_entry_reverse(pdd, &genpd->dev_list, list_node) {
ret = atomic_read(&genpd->sd_count) == 0 ?
__pm_genpd_save_device(pdd, genpd) : -EBUSY;
if (genpd_abort_poweroff(genpd))
goto out;
if (ret) {
genpd_set_active(genpd);
goto out;
}
if (genpd->status == GPD_STATE_REPEAT) {
genpd->poweroff_task = NULL;
goto start;
}
}
if (genpd->cpuidle_data) {
/*
* If cpuidle_data is set, cpuidle should turn the domain off
@ -607,14 +419,14 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
cpuidle_pause_and_lock();
genpd->cpuidle_data->idle_state->disabled = false;
cpuidle_resume_and_unlock();
goto out;
return 0;
}
if (genpd->power_off) {
if (atomic_read(&genpd->sd_count) > 0) {
ret = -EBUSY;
goto out;
}
int ret;
if (atomic_read(&genpd->sd_count) > 0)
return -EBUSY;
/*
* If sd_count > 0 at this point, one of the subdomains hasn't
@ -625,10 +437,8 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
* happen very often).
*/
ret = genpd_power_off(genpd, true);
if (ret == -EBUSY) {
genpd_set_active(genpd);
goto out;
}
if (ret)
return ret;
}
genpd->status = GPD_STATE_POWER_OFF;
@ -638,10 +448,7 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
genpd_queue_power_off_work(link->master);
}
out:
genpd->poweroff_task = NULL;
wake_up_all(&genpd->status_wait_queue);
return ret;
return 0;
}
/**
@ -654,9 +461,9 @@ static void genpd_power_off_work_fn(struct work_struct *work)
genpd = container_of(work, struct generic_pm_domain, power_off_work);
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
pm_genpd_poweroff(genpd);
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
}
/**
@ -670,7 +477,6 @@ static void genpd_power_off_work_fn(struct work_struct *work)
static int pm_genpd_runtime_suspend(struct device *dev)
{
struct generic_pm_domain *genpd;
struct generic_pm_domain_data *gpd_data;
bool (*stop_ok)(struct device *__dev);
int ret;
@ -684,10 +490,16 @@ static int pm_genpd_runtime_suspend(struct device *dev)
if (stop_ok && !stop_ok(dev))
return -EBUSY;
ret = genpd_stop_dev(genpd, dev);
ret = genpd_save_dev(genpd, dev);
if (ret)
return ret;
ret = genpd_stop_dev(genpd, dev);
if (ret) {
genpd_restore_dev(genpd, dev, true);
return ret;
}
/*
* If power.irq_safe is set, this routine will be run with interrupts
* off, so it can't use mutexes.
@ -696,16 +508,6 @@ static int pm_genpd_runtime_suspend(struct device *dev)
return 0;
mutex_lock(&genpd->lock);
/*
* If we have an unknown state of the need_restore flag, it means none
* of the runtime PM callbacks has been invoked yet. Let's update the
* flag to reflect that the current state is active.
*/
gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
if (gpd_data->need_restore < 0)
gpd_data->need_restore = 0;
genpd->in_progress++;
pm_genpd_poweroff(genpd);
genpd->in_progress--;
@ -725,8 +527,8 @@ static int pm_genpd_runtime_suspend(struct device *dev)
static int pm_genpd_runtime_resume(struct device *dev)
{
struct generic_pm_domain *genpd;
DEFINE_WAIT(wait);
int ret;
bool timed = true;
dev_dbg(dev, "%s()\n", __func__);
@ -735,40 +537,22 @@ static int pm_genpd_runtime_resume(struct device *dev)
return -EINVAL;
/* If power.irq_safe, the PM domain is never powered off. */
if (dev->power.irq_safe)
return genpd_start_dev_no_timing(genpd, dev);
if (dev->power.irq_safe) {
timed = false;
goto out;
}
mutex_lock(&genpd->lock);
ret = __pm_genpd_poweron(genpd);
if (ret) {
mutex_unlock(&genpd->lock);
return ret;
}
genpd->status = GPD_STATE_BUSY;
genpd->resume_count++;
for (;;) {
prepare_to_wait(&genpd->status_wait_queue, &wait,
TASK_UNINTERRUPTIBLE);
/*
* If current is the powering off task, we have been called
* reentrantly from one of the device callbacks, so we should
* not wait.
*/
if (!genpd->poweroff_task || genpd->poweroff_task == current)
break;
mutex_unlock(&genpd->lock);
schedule();
mutex_lock(&genpd->lock);
}
finish_wait(&genpd->status_wait_queue, &wait);
__pm_genpd_restore_device(dev->power.subsys_data->domain_data, genpd);
genpd->resume_count--;
genpd_set_active(genpd);
wake_up_all(&genpd->status_wait_queue);
mutex_unlock(&genpd->lock);
if (ret)
return ret;
out:
genpd_start_dev(genpd, dev, timed);
genpd_restore_dev(genpd, dev, timed);
return 0;
}
@ -883,7 +667,7 @@ static void pm_genpd_sync_poweron(struct generic_pm_domain *genpd,
{
struct gpd_link *link;
if (genpd->status != GPD_STATE_POWER_OFF)
if (genpd->status == GPD_STATE_ACTIVE)
return;
list_for_each_entry(link, &genpd->slave_links, slave_node) {
@ -960,14 +744,14 @@ static int pm_genpd_prepare(struct device *dev)
if (resume_needed(dev, genpd))
pm_runtime_resume(dev);
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
if (genpd->prepared_count++ == 0) {
genpd->suspended_count = 0;
genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF;
}
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
if (genpd->suspend_power_off) {
pm_runtime_put_noidle(dev);
@ -1102,7 +886,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
pm_genpd_sync_poweron(genpd, true);
genpd->suspended_count--;
return genpd_start_dev(genpd, dev);
return genpd_start_dev(genpd, dev, true);
}
/**
@ -1230,7 +1014,7 @@ static int pm_genpd_thaw_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev);
return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev, true);
}
/**
@ -1324,7 +1108,7 @@ static int pm_genpd_restore_noirq(struct device *dev)
pm_genpd_sync_poweron(genpd, true);
return genpd_start_dev(genpd, dev);
return genpd_start_dev(genpd, dev, true);
}
/**
@ -1440,7 +1224,6 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
gpd_data->td = *td;
gpd_data->base.dev = dev;
gpd_data->need_restore = -1;
gpd_data->td.constraint_changed = true;
gpd_data->td.effective_constraint_ns = -1;
gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
@ -1502,7 +1285,7 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
if (IS_ERR(gpd_data))
return PTR_ERR(gpd_data);
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
if (genpd->prepared_count > 0) {
ret = -EAGAIN;
@ -1519,7 +1302,7 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
out:
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
if (ret)
genpd_free_dev_data(dev, gpd_data);
@ -1563,7 +1346,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
gpd_data = to_gpd_data(pdd);
dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
if (genpd->prepared_count > 0) {
ret = -EAGAIN;
@ -1578,14 +1361,14 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
list_del_init(&pdd->list_node);
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
genpd_free_dev_data(dev, gpd_data);
return 0;
out:
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
dev_pm_qos_add_notifier(dev, &gpd_data->nb);
return ret;
@ -1606,17 +1389,9 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
|| genpd == subdomain)
return -EINVAL;
start:
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING);
if (subdomain->status != GPD_STATE_POWER_OFF
&& subdomain->status != GPD_STATE_ACTIVE) {
mutex_unlock(&subdomain->lock);
genpd_release_lock(genpd);
goto start;
}
if (genpd->status == GPD_STATE_POWER_OFF
&& subdomain->status != GPD_STATE_POWER_OFF) {
ret = -EINVAL;
@ -1644,7 +1419,7 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
out:
mutex_unlock(&subdomain->lock);
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
return ret;
}
@ -1692,8 +1467,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
return -EINVAL;
start:
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
list_for_each_entry(link, &genpd->master_links, master_node) {
if (link->slave != subdomain)
@ -1701,13 +1475,6 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING);
if (subdomain->status != GPD_STATE_POWER_OFF
&& subdomain->status != GPD_STATE_ACTIVE) {
mutex_unlock(&subdomain->lock);
genpd_release_lock(genpd);
goto start;
}
list_del(&link->master_node);
list_del(&link->slave_node);
kfree(link);
@ -1720,7 +1487,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
break;
}
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
return ret;
}
@ -1744,7 +1511,7 @@ int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
if (IS_ERR_OR_NULL(genpd) || state < 0)
return -EINVAL;
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
if (genpd->cpuidle_data) {
ret = -EEXIST;
@ -1775,7 +1542,7 @@ int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
genpd_recalc_cpu_exit_latency(genpd);
out:
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
return ret;
err:
@ -1812,7 +1579,7 @@ int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
if (IS_ERR_OR_NULL(genpd))
return -EINVAL;
genpd_acquire_lock(genpd);
mutex_lock(&genpd->lock);
cpuidle_data = genpd->cpuidle_data;
if (!cpuidle_data) {
@ -1830,7 +1597,7 @@ int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
kfree(cpuidle_data);
out:
genpd_release_lock(genpd);
mutex_unlock(&genpd->lock);
return ret;
}
@ -1912,9 +1679,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->in_progress = 0;
atomic_set(&genpd->sd_count, 0);
genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE;
init_waitqueue_head(&genpd->status_wait_queue);
genpd->poweroff_task = NULL;
genpd->resume_count = 0;
genpd->device_count = 0;
genpd->max_off_time_ns = -1;
genpd->max_off_time_changed = true;
@ -1952,6 +1716,7 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
list_add(&genpd->gpd_list_node, &gpd_list);
mutex_unlock(&gpd_list_lock);
}
EXPORT_SYMBOL_GPL(pm_genpd_init);
#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
/*
@ -2125,7 +1890,7 @@ EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
/**
* genpd_dev_pm_detach - Detach a device from its PM domain.
* @dev: Device to attach.
* @dev: Device to detach.
* @power_off: Currently not used
*
* Try to locate a corresponding generic PM domain, which the device was
@ -2183,7 +1948,10 @@ static void genpd_dev_pm_sync(struct device *dev)
* Both generic and legacy Samsung-specific DT bindings are supported to keep
* backwards compatibility with existing DTBs.
*
* Returns 0 on successfully attached PM domain or negative error code.
* Returns 0 on successfully attached PM domain or negative error code. Note
* that if a power-domain exists for the device, but it cannot be found or
* turned on, then return -EPROBE_DEFER to ensure that the device is not
* probed and to re-try again later.
*/
int genpd_dev_pm_attach(struct device *dev)
{
@ -2220,7 +1988,7 @@ int genpd_dev_pm_attach(struct device *dev)
dev_dbg(dev, "%s() failed to find PM domain: %ld\n",
__func__, PTR_ERR(pd));
of_node_put(dev->of_node);
return PTR_ERR(pd);
return -EPROBE_DEFER;
}
dev_dbg(dev, "adding to PM domain %s\n", pd->name);
@ -2238,14 +2006,15 @@ int genpd_dev_pm_attach(struct device *dev)
dev_err(dev, "failed to add to PM domain %s: %d",
pd->name, ret);
of_node_put(dev->of_node);
return ret;
goto out;
}
dev->pm_domain->detach = genpd_dev_pm_detach;
dev->pm_domain->sync = genpd_dev_pm_sync;
pm_genpd_poweron(pd);
ret = pm_genpd_poweron(pd);
return 0;
out:
return ret ? -EPROBE_DEFER : 0;
}
EXPORT_SYMBOL_GPL(genpd_dev_pm_attach);
#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
@ -2293,9 +2062,6 @@ static int pm_genpd_summary_one(struct seq_file *s,
{
static const char * const status_lookup[] = {
[GPD_STATE_ACTIVE] = "on",
[GPD_STATE_WAIT_MASTER] = "wait-master",
[GPD_STATE_BUSY] = "busy",
[GPD_STATE_REPEAT] = "off-in-progress",
[GPD_STATE_POWER_OFF] = "off"
};
struct pm_domain_data *pm_data;
@ -2309,7 +2075,7 @@ static int pm_genpd_summary_one(struct seq_file *s,
if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup)))
goto exit;
seq_printf(s, "%-30s %-15s ", genpd->name, status_lookup[genpd->status]);
seq_printf(s, "%-30s %-15s ", genpd->name, status_lookup[genpd->status]);
/*
* Modifications on the list require holding locks on both
@ -2344,8 +2110,8 @@ static int pm_genpd_summary_show(struct seq_file *s, void *data)
struct generic_pm_domain *genpd;
int ret = 0;
seq_puts(s, " domain status slaves\n");
seq_puts(s, " /device runtime status\n");
seq_puts(s, "domain status slaves\n");
seq_puts(s, " /device runtime status\n");
seq_puts(s, "----------------------------------------------------------------------\n");
ret = mutex_lock_interruptible(&gpd_list_lock);

2
drivers/base/power/main.c
View File

@ -1377,7 +1377,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
if (dev->power.direct_complete) {
if (pm_runtime_status_suspended(dev)) {
pm_runtime_disable(dev);
if (pm_runtime_suspended_if_enabled(dev))
if (pm_runtime_status_suspended(dev))
goto Complete;
pm_runtime_enable(dev);

2
drivers/power/avs/Kconfig
View File

@ -13,7 +13,7 @@ menuconfig POWER_AVS
config ROCKCHIP_IODOMAIN
tristate "Rockchip IO domain support"
depends on ARCH_ROCKCHIP && OF
depends on POWER_AVS && ARCH_ROCKCHIP && OF
help
Say y here to enable support io domains on Rockchip SoCs. It is
necessary for the io domain setting of the SoC to match the

59
drivers/power/avs/rockchip-io-domain.c
View File

@ -43,6 +43,10 @@
#define RK3288_SOC_CON2_FLASH0 BIT(7)
#define RK3288_SOC_FLASH_SUPPLY_NUM 2
#define RK3368_SOC_CON15 0x43c
#define RK3368_SOC_CON15_FLASH0 BIT(14)
#define RK3368_SOC_FLASH_SUPPLY_NUM 2
struct rockchip_iodomain;
/**
@ -158,6 +162,25 @@ static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
}
static void rk3368_iodomain_init(struct rockchip_iodomain *iod)
{
int ret;
u32 val;
/* if no flash supply we should leave things alone */
if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg)
return;
/*
* set flash0 iodomain to also use this framework
* instead of a special gpio.
*/
val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16);
ret = regmap_write(iod->grf, RK3368_SOC_CON15, val);
if (ret < 0)
dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
}
/*
* On the rk3188 the io-domains are handled by a shared register with the
* lower 8 bits being still being continuing drive-strength settings.
@ -201,6 +224,34 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
.init = rk3288_iodomain_init,
};
static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
.grf_offset = 0x900,
.supply_names = {
NULL, /* reserved */
"dvp", /* DVPIO_VDD */
"flash0", /* FLASH0_VDD (emmc) */
"wifi", /* APIO2_VDD (sdio0) */
NULL,
"audio", /* APIO3_VDD */
"sdcard", /* SDMMC0_VDD (sdmmc) */
"gpio30", /* APIO1_VDD */
"gpio1830", /* APIO4_VDD (gpujtag) */
},
.init = rk3368_iodomain_init,
};
static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = {
.grf_offset = 0x100,
.supply_names = {
NULL,
NULL,
NULL,
NULL,
"pmu", /*PMU IO domain*/
"vop", /*LCDC IO domain*/
},
};
static const struct of_device_id rockchip_iodomain_match[] = {
{
.compatible = "rockchip,rk3188-io-voltage-domain",
@ -210,6 +261,14 @@ static const struct of_device_id rockchip_iodomain_match[] = {
.compatible = "rockchip,rk3288-io-voltage-domain",
.data = (void *)&soc_data_rk3288
},
{
.compatible = "rockchip,rk3368-io-voltage-domain",
.data = (void *)&soc_data_rk3368
},
{
.compatible = "rockchip,rk3368-pmu-io-voltage-domain",
.data = (void *)&soc_data_rk3368_pmu
},
{ /* sentinel */ },
};

9
include/linux/pm_domain.h
View File

@ -22,9 +22,6 @@
enum gpd_status {
GPD_STATE_ACTIVE = 0, /* PM domain is active */
GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */
GPD_STATE_BUSY, /* Something is happening to the PM domain */
GPD_STATE_REPEAT, /* Power off in progress, to be repeated */
GPD_STATE_POWER_OFF, /* PM domain is off */
};
@ -59,9 +56,6 @@ struct generic_pm_domain {
unsigned int in_progress; /* Number of devices being suspended now */
atomic_t sd_count; /* Number of subdomains with power "on" */
enum gpd_status status; /* Current state of the domain */
wait_queue_head_t status_wait_queue;
struct task_struct *poweroff_task; /* Powering off task */
unsigned int resume_count; /* Number of devices being resumed */
unsigned int device_count; /* Number of devices */
unsigned int suspended_count; /* System suspend device counter */
unsigned int prepared_count; /* Suspend counter of prepared devices */
@ -113,7 +107,6 @@ struct generic_pm_domain_data {
struct pm_domain_data base;
struct gpd_timing_data td;
struct notifier_block nb;
int need_restore;
};
#ifdef CONFIG_PM_GENERIC_DOMAINS
@ -228,8 +221,6 @@ static inline int pm_genpd_name_poweron(const char *domain_name)
return -ENOSYS;
}
static inline void pm_genpd_poweroff_unused(void) {}
#define simple_qos_governor NULL
#define pm_domain_always_on_gov NULL
#endif
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,

6
include/linux/pm_runtime.h
View File

@ -98,11 +98,6 @@ static inline bool pm_runtime_status_suspended(struct device *dev)
return dev->power.runtime_status == RPM_SUSPENDED;
}
static inline bool pm_runtime_suspended_if_enabled(struct device *dev)
{
return pm_runtime_status_suspended(dev) && dev->power.disable_depth == 1;
}
static inline bool pm_runtime_enabled(struct device *dev)
{
return !dev->power.disable_depth;
@ -164,7 +159,6 @@ static inline void device_set_run_wake(struct device *dev, bool enable) {}
static inline bool pm_runtime_suspended(struct device *dev) { return false; }
static inline bool pm_runtime_active(struct device *dev) { return true; }
static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
static inline bool pm_runtime_suspended_if_enabled(struct device *dev) { return false; }
static inline bool pm_runtime_enabled(struct device *dev) { return false; }
static inline void pm_runtime_no_callbacks(struct device *dev) {}

10
kernel/power/Kconfig
View File

@ -18,6 +18,16 @@ config SUSPEND_FREEZER
Turning OFF this setting is NOT recommended! If in doubt, say Y.
config SUSPEND_SKIP_SYNC
bool "Skip kernel's sys_sync() on suspend to RAM/standby"
depends on SUSPEND
depends on EXPERT
help
Skip the kernel sys_sync() before freezing user processes.
Some systems prefer not to pay this cost on every invocation
of suspend, or they are content with invoking sync() from
user-space before invoking suspend. Say Y if that's your case.
config HIBERNATE_CALLBACKS
bool

2
kernel/power/suspend.c
View File

@ -484,11 +484,13 @@ static int enter_state(suspend_state_t state)
if (state == PM_SUSPEND_FREEZE)
freeze_begin();
#ifndef CONFIG_SUSPEND_SKIP_SYNC
trace_suspend_resume(TPS("sync_filesystems"), 0, true);
printk(KERN_INFO "PM: Syncing filesystems ... ");
sys_sync();
printk("done.\n");
trace_suspend_resume(TPS("sync_filesystems"), 0, false);
#endif
pr_debug("PM: Preparing system for sleep (%s)\n", pm_states[state]);
error = suspend_prepare(state);

18
kernel/power/wakelock.c
View File

@ -17,6 +17,7 @@
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include "power.h"
@ -83,7 +84,9 @@ static inline void decrement_wakelocks_number(void) {}
#define WL_GC_COUNT_MAX 100
#define WL_GC_TIME_SEC 300
static void __wakelocks_gc(struct work_struct *work);
static LIST_HEAD(wakelocks_lru_list);
static DECLARE_WORK(wakelock_work, __wakelocks_gc);
static unsigned int wakelocks_gc_count;
static inline void wakelocks_lru_add(struct wakelock *wl)
@ -96,13 +99,12 @@ static inline void wakelocks_lru_most_recent(struct wakelock *wl)
list_move(&wl->lru, &wakelocks_lru_list);
}
static void wakelocks_gc(void)
static void __wakelocks_gc(struct work_struct *work)
{
struct wakelock *wl, *aux;
ktime_t now;
if (++wakelocks_gc_count <= WL_GC_COUNT_MAX)
return;
mutex_lock(&wakelocks_lock);
now = ktime_get();
list_for_each_entry_safe_reverse(wl, aux, &wakelocks_lru_list, lru) {
@ -127,6 +129,16 @@ static void wakelocks_gc(void)
}
}
wakelocks_gc_count = 0;
mutex_unlock(&wakelocks_lock);
}
static void wakelocks_gc(void)
{
if (++wakelocks_gc_count <= WL_GC_COUNT_MAX)
return;
schedule_work(&wakelock_work);
}
#else /* !CONFIG_PM_WAKELOCKS_GC */
static inline void wakelocks_lru_add(struct wakelock *wl) {}