Merge branches 'pm-cpu', 'pm-cpuidle' and 'pm-domains'

* pm-cpu:
  kernel/cpu_pm: fix cpu_cluster_pm_exit comment

* pm-cpuidle:
  cpuidle/coupled: Add sanity check for safe_state_index

* pm-domains:
  staging: board: Migrate away from __pm_genpd_name_add_device()
  PM / Domains: Ensure subdomain is not in use before removing
  PM / Domains: Try power off masters in error path of __pm_genpd_poweron()
This commit is contained in:
Rafael J. Wysocki 2015-09-11 15:37:36 +02:00
commit 4614e0cc66
7 changed files with 94 additions and 16 deletions

View file

@ -212,6 +212,18 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool timed)
return ret;
}
/**
* genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff().
* @genpd: PM domait to power off.
*
* Queue up the execution of pm_genpd_poweroff() unless it's already been done
* before.
*/
static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
{
queue_work(pm_wq, &genpd->power_off_work);
}
/**
* __pm_genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
@ -259,8 +271,12 @@ static int __pm_genpd_poweron(struct generic_pm_domain *genpd)
return 0;
err:
list_for_each_entry_continue_reverse(link, &genpd->slave_links, slave_node)
list_for_each_entry_continue_reverse(link,
&genpd->slave_links,
slave_node) {
genpd_sd_counter_dec(link->master);
genpd_queue_power_off_work(link->master);
}
return ret;
}
@ -348,18 +364,6 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
return NOTIFY_DONE;
}
/**
* genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff().
* @genpd: PM domait to power off.
*
* Queue up the execution of pm_genpd_poweroff() unless it's already been done
* before.
*/
static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
{
queue_work(pm_wq, &genpd->power_off_work);
}
/**
* pm_genpd_poweroff - Remove power from a given PM domain.
* @genpd: PM domain to power down.
@ -1469,6 +1473,13 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
mutex_lock(&genpd->lock);
if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
subdomain->name);
ret = -EBUSY;
goto out;
}
list_for_each_entry(link, &genpd->master_links, master_node) {
if (link->slave != subdomain)
continue;
@ -1487,6 +1498,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
break;
}
out:
mutex_unlock(&genpd->lock);
return ret;

View file

@ -186,6 +186,28 @@ bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
return drv->states[state].flags & CPUIDLE_FLAG_COUPLED;
}
/**
* cpuidle_coupled_state_verify - check if the coupled states are correctly set.
* @drv: struct cpuidle_driver for the platform
*
* Returns 0 for valid state values, a negative error code otherwise:
* * -EINVAL if any coupled state(safe_state_index) is wrongly set.
*/
int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
{
int i;
for (i = drv->state_count - 1; i >= 0; i--) {
if (cpuidle_state_is_coupled(drv, i) &&
(drv->safe_state_index == i ||
drv->safe_state_index < 0 ||
drv->safe_state_index >= drv->state_count))
return -EINVAL;
}
return 0;
}
/**
* cpuidle_coupled_set_ready - mark a cpu as ready
* @coupled: the struct coupled that contains the current cpu

View file

@ -35,6 +35,7 @@ extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);
int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int next_state);
int cpuidle_coupled_register_device(struct cpuidle_device *dev);
@ -46,6 +47,11 @@ bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
return false;
}
static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
{
return 0;
}
static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int next_state)
{

View file

@ -227,6 +227,10 @@ static int __cpuidle_register_driver(struct cpuidle_driver *drv)
if (!drv || !drv->state_count)
return -EINVAL;
ret = cpuidle_coupled_state_verify(drv);
if (ret)
return ret;
if (cpuidle_disabled())
return -ENODEV;

View file

@ -91,7 +91,7 @@ static const struct board_staging_dev armadillo800eva_devices[] __initconst = {
.pdev = &lcdc0_device,
.clocks = lcdc0_clocks,
.nclocks = ARRAY_SIZE(lcdc0_clocks),
.domain = "a4lc",
.domain = "/system-controller@e6180000/pm-domains/c5/a4lc@1"
},
};

View file

@ -135,6 +135,40 @@ int __init board_staging_register_clock(const struct board_staging_clk *bsc)
return error;
}
#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
static int board_staging_add_dev_domain(struct platform_device *pdev,
const char *domain)
{
struct of_phandle_args pd_args;
struct generic_pm_domain *pd;
struct device_node *np;
np = of_find_node_by_path(domain);
if (!np) {
pr_err("Cannot find domain node %s\n", domain);
return -ENOENT;
}
pd_args.np = np;
pd_args.args_count = 0;
pd = of_genpd_get_from_provider(&pd_args);
if (IS_ERR(pd)) {
pr_err("Cannot find genpd %s (%ld)\n", domain, PTR_ERR(pd));
return PTR_ERR(pd);
}
pr_debug("Found genpd %s for device %s\n", pd->name, pdev->name);
return pm_genpd_add_device(pd, &pdev->dev);
}
#else
static inline int board_staging_add_dev_domain(struct platform_device *pdev,
const char *domain)
{
return 0;
}
#endif
int __init board_staging_register_device(const struct board_staging_dev *dev)
{
struct platform_device *pdev = dev->pdev;
@ -161,7 +195,7 @@ int __init board_staging_register_device(const struct board_staging_dev *dev)
}
if (dev->domain)
__pm_genpd_name_add_device(dev->domain, &pdev->dev, NULL);
board_staging_add_dev_domain(pdev, dev->domain);
return error;
}

View file

@ -180,7 +180,7 @@ EXPORT_SYMBOL_GPL(cpu_cluster_pm_enter);
* low power state that may have caused some blocks in the same power domain
* to reset.
*
* Must be called after cpu_pm_exit has been called on all cpus in the power
* Must be called after cpu_cluster_pm_enter has been called for the power
* domain, and before cpu_pm_exit has been called on any cpu in the power
* domain. Notified drivers can include VFP co-processor, interrupt controller
* and its PM extensions, local CPU timers context save/restore which