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-rw-r--r--drivers/base/arch_topology.c11
-rw-r--r--drivers/base/dd.c1
-rw-r--r--drivers/base/firmware_loader/main.c17
-rw-r--r--drivers/base/power/common.c8
-rw-r--r--drivers/base/power/domain.c278
-rw-r--r--drivers/base/power/domain_governor.c65
-rw-r--r--drivers/base/power/runtime.c53
-rw-r--r--drivers/base/power/wakeup.c1
-rw-r--r--drivers/base/property.c217
-rw-r--r--drivers/base/regmap/internal.h4
-rw-r--r--drivers/base/regmap/regcache.c4
-rw-r--r--drivers/base/regmap/regmap-i3c.c2
-rw-r--r--drivers/base/regmap/regmap-sccb.c2
-rw-r--r--drivers/base/regmap/regmap-sdw-mbq.c2
-rw-r--r--drivers/base/regmap/regmap-sdw.c2
-rw-r--r--drivers/base/regmap/regmap-slimbus.c2
-rw-r--r--drivers/base/regmap/regmap-w1.c6
-rw-r--r--drivers/base/regmap/regmap.c78
-rw-r--r--drivers/base/topology.c10
19 files changed, 460 insertions, 303 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 1d6636ebaac5..f73b836047cf 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -667,6 +667,15 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
core_mask = &cpu_topology[cpu].llc_sibling;
}
+ /*
+ * For systems with no shared cpu-side LLC but with clusters defined,
+ * extend core_mask to cluster_siblings. The sched domain builder will
+ * then remove MC as redundant with CLS if SCHED_CLUSTER is enabled.
+ */
+ if (IS_ENABLED(CONFIG_SCHED_CLUSTER) &&
+ cpumask_subset(core_mask, &cpu_topology[cpu].cluster_sibling))
+ core_mask = &cpu_topology[cpu].cluster_sibling;
+
return core_mask;
}
@@ -684,7 +693,7 @@ void update_siblings_masks(unsigned int cpuid)
for_each_online_cpu(cpu) {
cpu_topo = &cpu_topology[cpu];
- if (cpuid_topo->llc_id == cpu_topo->llc_id) {
+ if (cpu_topo->llc_id != -1 && cpuid_topo->llc_id == cpu_topo->llc_id) {
cpumask_set_cpu(cpu, &cpuid_topo->llc_sibling);
cpumask_set_cpu(cpuid, &cpu_topo->llc_sibling);
}
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index af6bea56f4e2..3fc3b5940bb3 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -296,6 +296,7 @@ int driver_deferred_probe_check_state(struct device *dev)
return -EPROBE_DEFER;
}
+EXPORT_SYMBOL_GPL(driver_deferred_probe_check_state);
static void deferred_probe_timeout_work_func(struct work_struct *work)
{
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 94d1789a233e..406a907a4cae 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -735,6 +735,8 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
size_t offset, u32 opt_flags)
{
struct firmware *fw = NULL;
+ struct cred *kern_cred = NULL;
+ const struct cred *old_cred;
bool nondirect = false;
int ret;
@@ -751,6 +753,18 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
if (ret <= 0) /* error or already assigned */
goto out;
+ /*
+ * We are about to try to access the firmware file. Because we may have been
+ * called by a driver when serving an unrelated request from userland, we use
+ * the kernel credentials to read the file.
+ */
+ kern_cred = prepare_kernel_cred(NULL);
+ if (!kern_cred) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ old_cred = override_creds(kern_cred);
+
ret = fw_get_filesystem_firmware(device, fw->priv, "", NULL);
/* Only full reads can support decompression, platform, and sysfs. */
@@ -776,6 +790,9 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
} else
ret = assign_fw(fw, device);
+ revert_creds(old_cred);
+ put_cred(kern_cred);
+
out:
if (ret < 0) {
fw_abort_batch_reqs(fw);
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index bbddb267c2e6..72115917e0bd 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -172,10 +172,10 @@ EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_name);
* @dev: Device to detach.
* @power_off: Used to indicate whether we should power off the device.
*
- * This functions will reverse the actions from dev_pm_domain_attach() and
- * dev_pm_domain_attach_by_id(), thus it detaches @dev from its PM domain.
- * Typically it should be invoked during the remove phase, either from
- * subsystem level code or from drivers.
+ * This functions will reverse the actions from dev_pm_domain_attach(),
+ * dev_pm_domain_attach_by_id() and dev_pm_domain_attach_by_name(), thus it
+ * detaches @dev from its PM domain. Typically it should be invoked during the
+ * remove phase, either from subsystem level code or from drivers.
*
* Callers must ensure proper synchronization of this function with power
* management callbacks.
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 1ee878d126fd..739e52cd4aba 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -131,7 +131,7 @@ static const struct genpd_lock_ops genpd_spin_ops = {
#define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN)
#define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
-static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
+static inline bool irq_safe_dev_in_sleep_domain(struct device *dev,
const struct generic_pm_domain *genpd)
{
bool ret;
@@ -139,11 +139,14 @@ static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
ret = pm_runtime_is_irq_safe(dev) && !genpd_is_irq_safe(genpd);
/*
- * Warn once if an IRQ safe device is attached to a no sleep domain, as
- * to indicate a suboptimal configuration for PM. For an always on
- * domain this isn't case, thus don't warn.
+ * Warn once if an IRQ safe device is attached to a domain, which
+ * callbacks are allowed to sleep. This indicates a suboptimal
+ * configuration for PM, but it doesn't matter for an always on domain.
*/
- if (ret && !genpd_is_always_on(genpd))
+ if (genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd))
+ return ret;
+
+ if (ret)
dev_warn_once(dev, "PM domain %s will not be powered off\n",
genpd->name);
@@ -225,24 +228,23 @@ static void genpd_debug_remove(struct generic_pm_domain *genpd)
static void genpd_update_accounting(struct generic_pm_domain *genpd)
{
- ktime_t delta, now;
+ u64 delta, now;
- now = ktime_get();
- delta = ktime_sub(now, genpd->accounting_time);
+ now = ktime_get_mono_fast_ns();
+ if (now <= genpd->accounting_time)
+ return;
+
+ delta = now - genpd->accounting_time;
/*
* If genpd->status is active, it means we are just
* out of off and so update the idle time and vice
* versa.
*/
- if (genpd->status == GENPD_STATE_ON) {
- int state_idx = genpd->state_idx;
-
- genpd->states[state_idx].idle_time =
- ktime_add(genpd->states[state_idx].idle_time, delta);
- } else {
- genpd->on_time = ktime_add(genpd->on_time, delta);
- }
+ if (genpd->status == GENPD_STATE_ON)
+ genpd->states[genpd->state_idx].idle_time += delta;
+ else
+ genpd->on_time += delta;
genpd->accounting_time = now;
}
@@ -476,15 +478,16 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
*/
void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
{
- struct generic_pm_domain_data *gpd_data;
struct generic_pm_domain *genpd;
+ struct gpd_timing_data *td;
genpd = dev_to_genpd_safe(dev);
if (!genpd)
return;
- gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
- gpd_data->next_wakeup = next;
+ td = to_gpd_data(dev->power.subsys_data->domain_data)->td;
+ if (td)
+ td->next_wakeup = next;
}
EXPORT_SYMBOL_GPL(dev_pm_genpd_set_next_wakeup);
@@ -506,6 +509,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
if (!genpd->power_on)
goto out;
+ timed = timed && genpd->gd && !genpd->states[state_idx].fwnode;
if (!timed) {
ret = genpd->power_on(genpd);
if (ret)
@@ -524,7 +528,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
goto out;
genpd->states[state_idx].power_on_latency_ns = elapsed_ns;
- genpd->max_off_time_changed = true;
+ genpd->gd->max_off_time_changed = true;
pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "on", elapsed_ns);
@@ -555,6 +559,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed)
if (!genpd->power_off)
goto out;
+ timed = timed && genpd->gd && !genpd->states[state_idx].fwnode;
if (!timed) {
ret = genpd->power_off(genpd);
if (ret)
@@ -573,7 +578,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed)
goto out;
genpd->states[state_idx].power_off_latency_ns = elapsed_ns;
- genpd->max_off_time_changed = true;
+ genpd->gd->max_off_time_changed = true;
pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
genpd->name, "off", elapsed_ns);
@@ -649,18 +654,12 @@ 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);
- if (stat > PM_QOS_FLAGS_NONE)
- return -EBUSY;
-
/*
* Do not allow PM domain to be powered off, when an IRQ safe
* device is part of a non-IRQ safe domain.
*/
if (!pm_runtime_suspended(pdd->dev) ||
- irq_safe_dev_in_no_sleep_domain(pdd->dev, genpd))
+ irq_safe_dev_in_sleep_domain(pdd->dev, genpd))
not_suspended++;
}
@@ -775,25 +774,27 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
dev = gpd_data->base.dev;
for (;;) {
- struct generic_pm_domain *genpd;
+ struct generic_pm_domain *genpd = ERR_PTR(-ENODATA);
struct pm_domain_data *pdd;
+ struct gpd_timing_data *td;
spin_lock_irq(&dev->power.lock);
pdd = dev->power.subsys_data ?
dev->power.subsys_data->domain_data : NULL;
if (pdd) {
- to_gpd_data(pdd)->td.constraint_changed = true;
- genpd = dev_to_genpd(dev);
- } else {
- genpd = ERR_PTR(-ENODATA);
+ td = to_gpd_data(pdd)->td;
+ if (td) {
+ td->constraint_changed = true;
+ genpd = dev_to_genpd(dev);
+ }
}
spin_unlock_irq(&dev->power.lock);
if (!IS_ERR(genpd)) {
genpd_lock(genpd);
- genpd->max_off_time_changed = true;
+ genpd->gd->max_off_time_changed = true;
genpd_unlock(genpd);
}
@@ -879,9 +880,9 @@ static int genpd_runtime_suspend(struct device *dev)
struct generic_pm_domain *genpd;
bool (*suspend_ok)(struct device *__dev);
struct generic_pm_domain_data *gpd_data = dev_gpd_data(dev);
- struct gpd_timing_data *td = &gpd_data->td;
+ struct gpd_timing_data *td = gpd_data->td;
bool runtime_pm = pm_runtime_enabled(dev);
- ktime_t time_start;
+ ktime_t time_start = 0;
s64 elapsed_ns;
int ret;
@@ -902,8 +903,7 @@ static int genpd_runtime_suspend(struct device *dev)
return -EBUSY;
/* Measure suspend latency. */
- time_start = 0;
- if (runtime_pm)
+ if (td && runtime_pm)
time_start = ktime_get();
ret = __genpd_runtime_suspend(dev);
@@ -917,13 +917,13 @@ static int genpd_runtime_suspend(struct device *dev)
}
/* Update suspend latency value if the measured time exceeds it. */
- if (runtime_pm) {
+ if (td && runtime_pm) {
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns > td->suspend_latency_ns) {
td->suspend_latency_ns = elapsed_ns;
dev_dbg(dev, "suspend latency exceeded, %lld ns\n",
elapsed_ns);
- genpd->max_off_time_changed = true;
+ genpd->gd->max_off_time_changed = true;
td->constraint_changed = true;
}
}
@@ -932,7 +932,7 @@ static int genpd_runtime_suspend(struct device *dev)
* If power.irq_safe is set, this routine may be run with
* IRQs disabled, so suspend only if the PM domain also is irq_safe.
*/
- if (irq_safe_dev_in_no_sleep_domain(dev, genpd))
+ if (irq_safe_dev_in_sleep_domain(dev, genpd))
return 0;
genpd_lock(genpd);
@@ -955,12 +955,11 @@ static int genpd_runtime_resume(struct device *dev)
{
struct generic_pm_domain *genpd;
struct generic_pm_domain_data *gpd_data = dev_gpd_data(dev);
- struct gpd_timing_data *td = &gpd_data->td;
- bool runtime_pm = pm_runtime_enabled(dev);
- ktime_t time_start;
+ struct gpd_timing_data *td = gpd_data->td;
+ bool timed = td && pm_runtime_enabled(dev);
+ ktime_t time_start = 0;
s64 elapsed_ns;
int ret;
- bool timed = true;
dev_dbg(dev, "%s()\n", __func__);
@@ -972,10 +971,8 @@ static int genpd_runtime_resume(struct device *dev)
* As we don't power off a non IRQ safe domain, which holds
* an IRQ safe device, we don't need to restore power to it.
*/
- if (irq_safe_dev_in_no_sleep_domain(dev, genpd)) {
- timed = false;
+ if (irq_safe_dev_in_sleep_domain(dev, genpd))
goto out;
- }
genpd_lock(genpd);
ret = genpd_power_on(genpd, 0);
@@ -988,8 +985,7 @@ static int genpd_runtime_resume(struct device *dev)
out:
/* Measure resume latency. */
- time_start = 0;
- if (timed && runtime_pm)
+ if (timed)
time_start = ktime_get();
ret = genpd_start_dev(genpd, dev);
@@ -1001,13 +997,13 @@ static int genpd_runtime_resume(struct device *dev)
goto err_stop;
/* Update resume latency value if the measured time exceeds it. */
- if (timed && runtime_pm) {
+ if (timed) {
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
if (elapsed_ns > td->resume_latency_ns) {
td->resume_latency_ns = elapsed_ns;
dev_dbg(dev, "resume latency exceeded, %lld ns\n",
elapsed_ns);
- genpd->max_off_time_changed = true;
+ genpd->gd->max_off_time_changed = true;
td->constraint_changed = true;
}
}
@@ -1500,9 +1496,11 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_resume);
#endif /* CONFIG_PM_SLEEP */
-static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev)
+static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
+ bool has_governor)
{
struct generic_pm_domain_data *gpd_data;
+ struct gpd_timing_data *td;
int ret;
ret = dev_pm_get_subsys_data(dev);
@@ -1516,26 +1514,38 @@ 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 = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
- gpd_data->next_wakeup = KTIME_MAX;
- spin_lock_irq(&dev->power.lock);
+ /* Allocate data used by a governor. */
+ if (has_governor) {
+ td = kzalloc(sizeof(*td), GFP_KERNEL);
+ if (!td) {
+ ret = -ENOMEM;
+ goto err_free;
+ }
- if (dev->power.subsys_data->domain_data) {
- ret = -EINVAL;
- goto err_free;
+ td->constraint_changed = true;
+ td->effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
+ td->next_wakeup = KTIME_MAX;
+ gpd_data->td = td;
}
- dev->power.subsys_data->domain_data = &gpd_data->base;
+ spin_lock_irq(&dev->power.lock);
+
+ if (dev->power.subsys_data->domain_data)
+ ret = -EINVAL;
+ else
+ dev->power.subsys_data->domain_data = &gpd_data->base;
spin_unlock_irq(&dev->power.lock);
+ if (ret)
+ goto err_free;
+
return gpd_data;
err_free:
- spin_unlock_irq(&dev->power.lock);
+ kfree(gpd_data->td);
kfree(gpd_data);
err_put:
dev_pm_put_subsys_data(dev);
@@ -1551,6 +1561,7 @@ static void genpd_free_dev_data(struct device *dev,
spin_unlock_irq(&dev->power.lock);
+ kfree(gpd_data->td);
kfree(gpd_data);
dev_pm_put_subsys_data(dev);
}
@@ -1607,6 +1618,7 @@ static int genpd_get_cpu(struct generic_pm_domain *genpd, struct device *dev)
static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
struct device *base_dev)
{
+ struct genpd_governor_data *gd = genpd->gd;
struct generic_pm_domain_data *gpd_data;
int ret;
@@ -1615,7 +1627,7 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev))
return -EINVAL;
- gpd_data = genpd_alloc_dev_data(dev);
+ gpd_data = genpd_alloc_dev_data(dev, gd);
if (IS_ERR(gpd_data))
return PTR_ERR(gpd_data);
@@ -1631,7 +1643,8 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
dev_pm_domain_set(dev, &genpd->domain);
genpd->device_count++;
- genpd->max_off_time_changed = true;
+ if (gd)
+ gd->max_off_time_changed = true;
list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
@@ -1685,7 +1698,8 @@ static int genpd_remove_device(struct generic_pm_domain *genpd,
}
genpd->device_count--;
- genpd->max_off_time_changed = true;
+ if (genpd->gd)
+ genpd->gd->max_off_time_changed = true;
genpd_clear_cpumask(genpd, gpd_data->cpu);
dev_pm_domain_set(dev, NULL);
@@ -1958,6 +1972,53 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
return 0;
}
+static int genpd_alloc_data(struct generic_pm_domain *genpd)
+{
+ struct genpd_governor_data *gd = NULL;
+ int ret;
+
+ if (genpd_is_cpu_domain(genpd) &&
+ !zalloc_cpumask_var(&genpd->cpus, GFP_KERNEL))
+ return -ENOMEM;
+
+ if (genpd->gov) {
+ gd = kzalloc(sizeof(*gd), GFP_KERNEL);
+ if (!gd) {
+ ret = -ENOMEM;
+ goto free;
+ }
+
+ gd->max_off_time_ns = -1;
+ gd->max_off_time_changed = true;
+ gd->next_wakeup = KTIME_MAX;
+ }
+
+ /* Use only one "off" state if there were no states declared */
+ if (genpd->state_count == 0) {
+ ret = genpd_set_default_power_state(genpd);
+ if (ret)
+ goto free;
+ }
+
+ genpd->gd = gd;
+ return 0;
+
+free:
+ if (genpd_is_cpu_domain(genpd))
+ free_cpumask_var(genpd->cpus);
+ kfree(gd);
+ return ret;
+}
+
+static void genpd_free_data(struct generic_pm_domain *genpd)
+{
+ if (genpd_is_cpu_domain(genpd))
+ free_cpumask_var(genpd->cpus);
+ if (genpd->free_states)
+ genpd->free_states(genpd->states, genpd->state_count);
+ kfree(genpd->gd);
+}
+
static void genpd_lock_init(struct generic_pm_domain *genpd)
{
if (genpd->flags & GENPD_FLAG_IRQ_SAFE) {
@@ -1995,11 +2056,9 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
atomic_set(&genpd->sd_count, 0);
genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON;
genpd->device_count = 0;
- genpd->max_off_time_ns = -1;
- genpd->max_off_time_changed = true;
genpd->provider = NULL;
genpd->has_provider = false;
- genpd->accounting_time = ktime_get();
+ genpd->accounting_time = ktime_get_mono_fast_ns();
genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;
genpd->domain.ops.runtime_resume = genpd_runtime_resume;
genpd->domain.ops.prepare = genpd_prepare;
@@ -2017,26 +2076,22 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
genpd->dev_ops.start = pm_clk_resume;
}
+ /* The always-on governor works better with the corresponding flag. */
+ if (gov == &pm_domain_always_on_gov)
+ genpd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;
+
/* Always-on domains must be powered on at initialization. */
if ((genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd)) &&
!genpd_status_on(genpd))
return -EINVAL;
- if (genpd_is_cpu_domain(genpd) &&
- !zalloc_cpumask_var(&genpd->cpus, GFP_KERNEL))
- return -ENOMEM;
-
- /* Use only one "off" state if there were no states declared */
- if (genpd->state_count == 0) {
- ret = genpd_set_default_power_state(genpd);
- if (ret) {
- if (genpd_is_cpu_domain(genpd))
- free_cpumask_var(genpd->cpus);
- return ret;
- }
- } else if (!gov && genpd->state_count > 1) {
+ /* Multiple states but no governor doesn't make sense. */
+ if (!gov && genpd->state_count > 1)
pr_warn("%s: no governor for states\n", genpd->name);
- }
+
+ ret = genpd_alloc_data(genpd);
+ if (ret)
+ return ret;
device_initialize(&genpd->dev);
dev_set_name(&genpd->dev, "%s", genpd->name);
@@ -2081,10 +2136,7 @@ static int genpd_remove(struct generic_pm_domain *genpd)
genpd_unlock(genpd);
genpd_debug_remove(genpd);
cancel_work_sync(&genpd->power_off_work);
- if (genpd_is_cpu_domain(genpd))
- free_cpumask_var(genpd->cpus);
- if (genpd->free_states)
- genpd->free_states(genpd->states, genpd->state_count);
+ genpd_free_data(genpd);
pr_debug("%s: removed %s\n", __func__, genpd->name);
@@ -3163,6 +3215,7 @@ static int sub_domains_show(struct seq_file *s, void *data)
static int idle_states_show(struct seq_file *s, void *data)
{
struct generic_pm_domain *genpd = s->private;
+ u64 now, delta, idle_time = 0;
unsigned int i;
int ret = 0;
@@ -3173,17 +3226,19 @@ static int idle_states_show(struct seq_file *s, void *data)
seq_puts(s, "State Time Spent(ms) Usage Rejected\n");
for (i = 0; i < genpd->state_count; i++) {
- ktime_t delta = 0;
- s64 msecs;
+ idle_time += genpd->states[i].idle_time;
- if ((genpd->status == GENPD_STATE_OFF) &&
- (genpd->state_idx == i))
- delta = ktime_sub(ktime_get(), genpd->accounting_time);
+ if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) {
+ now = ktime_get_mono_fast_ns();
+ if (now > genpd->accounting_time) {
+ delta = now - genpd->accounting_time;
+ idle_time += delta;
+ }
+ }
- msecs = ktime_to_ms(
- ktime_add(genpd->states[i].idle_time, delta));
- seq_printf(s, "S%-13i %-14lld %-14llu %llu\n", i, msecs,
- genpd->states[i].usage, genpd->states[i].rejected);
+ do_div(idle_time, NSEC_PER_MSEC);
+ seq_printf(s, "S%-13i %-14llu %-14llu %llu\n", i, idle_time,
+ genpd->states[i].usage, genpd->states[i].rejected);
}
genpd_unlock(genpd);
@@ -3193,18 +3248,22 @@ static int idle_states_show(struct seq_file *s, void *data)
static int active_time_show(struct seq_file *s, void *data)
{
struct generic_pm_domain *genpd = s->private;
- ktime_t delta = 0;
+ u64 now, on_time, delta = 0;
int ret = 0;
ret = genpd_lock_interruptible(genpd);
if (ret)
return -ERESTARTSYS;
- if (genpd->status == GENPD_STATE_ON)
- delta = ktime_sub(ktime_get(), genpd->accounting_time);
+ if (genpd->status == GENPD_STATE_ON) {
+ now = ktime_get_mono_fast_ns();
+ if (now > genpd->accounting_time)
+ delta = now - genpd->accounting_time;
+ }
- seq_printf(s, "%lld ms\n", ktime_to_ms(
- ktime_add(genpd->on_time, delta)));
+ on_time = genpd->on_time + delta;
+ do_div(on_time, NSEC_PER_MSEC);
+ seq_printf(s, "%llu ms\n", on_time);
genpd_unlock(genpd);
return ret;
@@ -3213,7 +3272,7 @@ static int active_time_show(struct seq_file *s, void *data)
static int total_idle_time_show(struct seq_file *s, void *data)
{
struct generic_pm_domain *genpd = s->private;
- ktime_t delta = 0, total = 0;
+ u64 now, delta, total = 0;
unsigned int i;
int ret = 0;
@@ -3222,16 +3281,19 @@ static int total_idle_time_show(struct seq_file *s, void *data)
return -ERESTARTSYS;
for (i = 0; i < genpd->state_count; i++) {
+ total += genpd->states[i].idle_time;
- if ((genpd->status == GENPD_STATE_OFF) &&
- (genpd->state_idx == i))
- delta = ktime_sub(ktime_get(), genpd->accounting_time);
-
- total = ktime_add(total, genpd->states[i].idle_time);
+ if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) {
+ now = ktime_get_mono_fast_ns();
+ if (now > genpd->accounting_time) {
+ delta = now - genpd->accounting_time;
+ total += delta;
+ }
+ }
}
- total = ktime_add(total, delta);
- seq_printf(s, "%lld ms\n", ktime_to_ms(total));
+ do_div(total, NSEC_PER_MSEC);
+ seq_printf(s, "%llu ms\n", total);
genpd_unlock(genpd);
return ret;
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c
index cd08c5885190..282a3a135827 100644
--- a/drivers/base/power/domain_governor.c
+++ b/drivers/base/power/domain_governor.c
@@ -18,6 +18,8 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
s64 constraint_ns;
if (dev->power.subsys_data && dev->power.subsys_data->domain_data) {
+ struct gpd_timing_data *td = dev_gpd_data(dev)->td;
+
/*
* Only take suspend-time QoS constraints of devices into
* account, because constraints updated after the device has
@@ -25,7 +27,8 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
* 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;
+ constraint_ns = td ? td->effective_constraint_ns :
+ PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
} else {
/*
* The child is not in a domain and there's no info on its
@@ -49,7 +52,7 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
*/
static bool default_suspend_ok(struct device *dev)
{
- struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
+ struct gpd_timing_data *td = dev_gpd_data(dev)->td;
unsigned long flags;
s64 constraint_ns;
@@ -136,26 +139,28 @@ static void update_domain_next_wakeup(struct generic_pm_domain *genpd, ktime_t n
* is able to enter its optimal idle state.
*/
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
- next_wakeup = to_gpd_data(pdd)->next_wakeup;
+ next_wakeup = to_gpd_data(pdd)->td->next_wakeup;
if (next_wakeup != KTIME_MAX && !ktime_before(next_wakeup, now))
if (ktime_before(next_wakeup, domain_wakeup))
domain_wakeup = next_wakeup;
}
list_for_each_entry(link, &genpd->parent_links, parent_node) {
- next_wakeup = link->child->next_wakeup;
+ struct genpd_governor_data *cgd = link->child->gd;
+
+ next_wakeup = cgd ? cgd->next_wakeup : KTIME_MAX;
if (next_wakeup != KTIME_MAX && !ktime_before(next_wakeup, now))
if (ktime_before(next_wakeup, domain_wakeup))
domain_wakeup = next_wakeup;
}
- genpd->next_wakeup = domain_wakeup;
+ genpd->gd->next_wakeup = domain_wakeup;
}
static bool next_wakeup_allows_state(struct generic_pm_domain *genpd,
unsigned int state, ktime_t now)
{
- ktime_t domain_wakeup = genpd->next_wakeup;
+ ktime_t domain_wakeup = genpd->gd->next_wakeup;
s64 idle_time_ns, min_sleep_ns;
min_sleep_ns = genpd->states[state].power_off_latency_ns +
@@ -185,8 +190,9 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
* All subdomains have been powered off already at this point.
*/
list_for_each_entry(link, &genpd->parent_links, parent_node) {
- struct generic_pm_domain *sd = link->child;
- s64 sd_max_off_ns = sd->max_off_time_ns;
+ struct genpd_governor_data *cgd = link->child->gd;
+
+ s64 sd_max_off_ns = cgd ? cgd->max_off_time_ns : -1;
if (sd_max_off_ns < 0)
continue;
@@ -215,7 +221,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
* domain to turn off and on (that's how much time it will
* have to wait worst case).
*/
- td = &to_gpd_data(pdd)->td;
+ td = to_gpd_data(pdd)->td;
constraint_ns = td->effective_constraint_ns;
/*
* Zero means "no suspend at all" and this runs only when all
@@ -244,7 +250,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
* time and the time needed to turn the domain on is the maximum
* theoretical time this domain can spend in the "off" state.
*/
- genpd->max_off_time_ns = min_off_time_ns -
+ genpd->gd->max_off_time_ns = min_off_time_ns -
genpd->states[state].power_on_latency_ns;
return true;
}
@@ -259,6 +265,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
{
struct generic_pm_domain *genpd = pd_to_genpd(pd);
+ struct genpd_governor_data *gd = genpd->gd;
int state_idx = genpd->state_count - 1;
struct gpd_link *link;
@@ -269,11 +276,11 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
* cannot be met.
*/
update_domain_next_wakeup(genpd, now);
- if ((genpd->flags & GENPD_FLAG_MIN_RESIDENCY) && (genpd->next_wakeup != KTIME_MAX)) {
+ if ((genpd->flags & GENPD_FLAG_MIN_RESIDENCY) && (gd->next_wakeup != KTIME_MAX)) {
/* Let's find out the deepest domain idle state, the devices prefer */
while (state_idx >= 0) {
if (next_wakeup_allows_state(genpd, state_idx, now)) {
- genpd->max_off_time_changed = true;
+ gd->max_off_time_changed = true;
break;
}
state_idx--;
@@ -281,14 +288,14 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
if (state_idx < 0) {
state_idx = 0;
- genpd->cached_power_down_ok = false;
+ gd->cached_power_down_ok = false;
goto done;
}
}
- if (!genpd->max_off_time_changed) {
- genpd->state_idx = genpd->cached_power_down_state_idx;
- return genpd->cached_power_down_ok;
+ if (!gd->max_off_time_changed) {
+ genpd->state_idx = gd->cached_power_down_state_idx;
+ return gd->cached_power_down_ok;
}
/*
@@ -297,12 +304,16 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
* going to be called for any parent until this instance
* returns.
*/
- list_for_each_entry(link, &genpd->child_links, child_node)
- link->parent->max_off_time_changed = true;
+ list_for_each_entry(link, &genpd->child_links, child_node) {
+ struct genpd_governor_data *pgd = link->parent->gd;
+
+ if (pgd)
+ pgd->max_off_time_changed = true;
+ }
- genpd->max_off_time_ns = -1;
- genpd->max_off_time_changed = false;
- genpd->cached_power_down_ok = true;
+ gd->max_off_time_ns = -1;
+ gd->max_off_time_changed = false;
+ gd->cached_power_down_ok = true;
/*
* Find a state to power down to, starting from the state
@@ -310,7 +321,7 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
*/
while (!__default_power_down_ok(pd, state_idx)) {
if (state_idx == 0) {
- genpd->cached_power_down_ok = false;
+ gd->cached_power_down_ok = false;
break;
}
state_idx--;
@@ -318,8 +329,8 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
done:
genpd->state_idx = state_idx;
- genpd->cached_power_down_state_idx = genpd->state_idx;
- return genpd->cached_power_down_ok;
+ gd->cached_power_down_state_idx = genpd->state_idx;
+ return gd->cached_power_down_ok;
}
static bool default_power_down_ok(struct dev_pm_domain *pd)
@@ -327,11 +338,6 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
return _default_power_down_ok(pd, ktime_get());
}
-static bool always_on_power_down_ok(struct dev_pm_domain *domain)
-{
- return false;
-}
-
#ifdef CONFIG_CPU_IDLE
static bool cpu_power_down_ok(struct dev_pm_domain *pd)
{
@@ -401,6 +407,5 @@ struct dev_power_governor simple_qos_governor = {
* pm_genpd_gov_always_on - A governor implementing an always-on policy
*/
struct dev_power_governor pm_domain_always_on_gov = {
- .power_down_ok = always_on_power_down_ok,
.suspend_ok = default_suspend_ok,
};
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index d4059e6ffeae..676dc72d912d 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -263,7 +263,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
retval = -EINVAL;
else if (dev->power.disable_depth > 0)
retval = -EACCES;
- else if (atomic_read(&dev->power.usage_count) > 0)
+ else if (atomic_read(&dev->power.usage_count))
retval = -EAGAIN;
else if (!dev->power.ignore_children &&
atomic_read(&dev->power.child_count))
@@ -1039,13 +1039,33 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
}
EXPORT_SYMBOL_GPL(pm_schedule_suspend);
+static int rpm_drop_usage_count(struct device *dev)
+{
+ int ret;
+
+ ret = atomic_sub_return(1, &dev->power.usage_count);
+ if (ret >= 0)
+ return ret;
+
+ /*
+ * Because rpm_resume() does not check the usage counter, it will resume
+ * the device even if the usage counter is 0 or negative, so it is
+ * sufficient to increment the usage counter here to reverse the change
+ * made above.
+ */
+ atomic_inc(&dev->power.usage_count);
+ dev_warn(dev, "Runtime PM usage count underflow!\n");
+ return -EINVAL;
+}
+
/**
* __pm_runtime_idle - Entry point for runtime idle operations.
* @dev: Device to send idle notification for.
* @rpmflags: Flag bits.
*
* If the RPM_GET_PUT flag is set, decrement the device's usage count and
- * return immediately if it is larger than zero. Then carry out an idle
+ * return immediately if it is larger than zero (if it becomes negative, log a
+ * warning, increment it, and return an error). Then carry out an idle
* notification, either synchronous or asynchronous.
*
* This routine may be called in atomic context if the RPM_ASYNC flag is set,
@@ -1057,7 +1077,10 @@ int __pm_runtime_idle(struct device *dev, int rpmflags)
int retval;
if (rpmflags & RPM_GET_PUT) {
- if (!atomic_dec_and_test(&dev->power.usage_count)) {
+ retval = rpm_drop_usage_count(dev);
+ if (retval < 0) {
+ return retval;
+ } else if (retval > 0) {
trace_rpm_usage_rcuidle(dev, rpmflags);
return 0;
}
@@ -1079,7 +1102,8 @@ EXPORT_SYMBOL_GPL(__pm_runtime_idle);
* @rpmflags: Flag bits.
*
* If the RPM_GET_PUT flag is set, decrement the device's usage count and
- * return immediately if it is larger than zero. Then carry out a suspend,
+ * return immediately if it is larger than zero (if it becomes negative, log a
+ * warning, increment it, and return an error). Then carry out a suspend,
* either synchronous or asynchronous.
*
* This routine may be called in atomic context if the RPM_ASYNC flag is set,
@@ -1091,7 +1115,10 @@ int __pm_runtime_suspend(struct device *dev, int rpmflags)
int retval;
if (rpmflags & RPM_GET_PUT) {
- if (!atomic_dec_and_test(&dev->power.usage_count)) {
+ retval = rpm_drop_usage_count(dev);
+ if (retval < 0) {
+ return retval;
+ } else if (retval > 0) {
trace_rpm_usage_rcuidle(dev, rpmflags);
return 0;
}
@@ -1210,12 +1237,13 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
{
struct device *parent = dev->parent;
bool notify_parent = false;
+ unsigned long flags;
int error = 0;
if (status != RPM_ACTIVE && status != RPM_SUSPENDED)
return -EINVAL;
- spin_lock_irq(&dev->power.lock);
+ spin_lock_irqsave(&dev->power.lock, flags);
/*
* Prevent PM-runtime from being enabled for the device or return an
@@ -1226,7 +1254,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
else
error = -EAGAIN;
- spin_unlock_irq(&dev->power.lock);
+ spin_unlock_irqrestore(&dev->power.lock, flags);
if (error)
return error;
@@ -1247,7 +1275,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
device_links_read_unlock(idx);
}
- spin_lock_irq(&dev->power.lock);
+ spin_lock_irqsave(&dev->power.lock, flags);
if (dev->power.runtime_status == status || !parent)
goto out_set;
@@ -1288,7 +1316,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
dev->power.runtime_error = 0;
out:
- spin_unlock_irq(&dev->power.lock);
+ spin_unlock_irqrestore(&dev->power.lock, flags);
if (notify_parent)
pm_request_idle(parent);
@@ -1527,14 +1555,17 @@ EXPORT_SYMBOL_GPL(pm_runtime_forbid);
*/
void pm_runtime_allow(struct device *dev)
{
+ int ret;
+
spin_lock_irq(&dev->power.lock);
if (dev->power.runtime_auto)
goto out;
dev->power.runtime_auto = true;
- if (atomic_dec_and_test(&dev->power.usage_count))
+ ret = rpm_drop_usage_count(dev);
+ if (ret == 0)
rpm_idle(dev, RPM_AUTO | RPM_ASYNC);
- else
+ else if (ret > 0)
trace_rpm_usage_rcuidle(dev, RPM_AUTO | RPM_ASYNC);
out:
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index a57d469676ca..11a4ffe91367 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -930,6 +930,7 @@ bool pm_wakeup_pending(void)
return ret || atomic_read(&pm_abort_suspend) > 0;
}
+EXPORT_SYMBOL_GPL(pm_wakeup_pending);
void pm_system_wakeup(void)
{
diff --git a/drivers/base/property.c b/drivers/base/property.c
index c0e94cce9c29..3adcac2c78fa 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -47,12 +47,14 @@ bool fwnode_property_present(const struct fwnode_handle *fwnode,
{
bool ret;
+ if (IS_ERR_OR_NULL(fwnode))
+ return false;
+
ret = fwnode_call_bool_op(fwnode, property_present, propname);
- if (ret == false && !IS_ERR_OR_NULL(fwnode) &&
- !IS_ERR_OR_NULL(fwnode->secondary))
- ret = fwnode_call_bool_op(fwnode->secondary, property_present,
- propname);
- return ret;
+ if (ret)
+ return ret;
+
+ return fwnode_call_bool_op(fwnode->secondary, property_present, propname);
}
EXPORT_SYMBOL_GPL(fwnode_property_present);
@@ -66,6 +68,9 @@ EXPORT_SYMBOL_GPL(fwnode_property_present);
* Function reads an array of u8 properties with @propname from the device
* firmware description and stores them to @val if found.
*
+ * It's recommended to call device_property_count_u8() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -91,6 +96,9 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array);
* Function reads an array of u16 properties with @propname from the device
* firmware description and stores them to @val if found.
*
+ * It's recommended to call device_property_count_u16() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -116,6 +124,9 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array);
* Function reads an array of u32 properties with @propname from the device
* firmware description and stores them to @val if found.
*
+ * It's recommended to call device_property_count_u32() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -141,6 +152,9 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array);
* Function reads an array of u64 properties with @propname from the device
* firmware description and stores them to @val if found.
*
+ * It's recommended to call device_property_count_u64() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -166,6 +180,9 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array);
* Function reads an array of string properties with @propname from the device
* firmware description and stores them to @val if found.
*
+ * It's recommended to call device_property_string_array_count() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values read on success if @val is non-NULL,
* number of values available on success if @val is NULL,
* %-EINVAL if given arguments are not valid,
@@ -232,15 +249,16 @@ static int fwnode_property_read_int_array(const struct fwnode_handle *fwnode,
{
int ret;
+ if (IS_ERR_OR_NULL(fwnode))
+ return -EINVAL;
+
ret = fwnode_call_int_op(fwnode, property_read_int_array, propname,
elem_size, val, nval);
- if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
- !IS_ERR_OR_NULL(fwnode->secondary))
- ret = fwnode_call_int_op(
- fwnode->secondary, property_read_int_array, propname,
- elem_size, val, nval);
+ if (ret != -EINVAL)
+ return ret;
- return ret;
+ return fwnode_call_int_op(fwnode->secondary, property_read_int_array, propname,
+ elem_size, val, nval);
}
/**
@@ -253,6 +271,9 @@ static int fwnode_property_read_int_array(const struct fwnode_handle *fwnode,
* Read an array of u8 properties with @propname from @fwnode and stores them to
* @val if found.
*
+ * It's recommended to call fwnode_property_count_u8() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -279,6 +300,9 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array);
* Read an array of u16 properties with @propname from @fwnode and store them to
* @val if found.
*
+ * It's recommended to call fwnode_property_count_u16() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -305,6 +329,9 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array);
* Read an array of u32 properties with @propname from @fwnode store them to
* @val if found.
*
+ * It's recommended to call fwnode_property_count_u32() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -331,6 +358,9 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array);
* Read an array of u64 properties with @propname from @fwnode and store them to
* @val if found.
*
+ * It's recommended to call fwnode_property_count_u64() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
@@ -357,6 +387,9 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array);
* Read an string list property @propname from the given firmware node and store
* them to @val if found.
*
+ * It's recommended to call fwnode_property_string_array_count() instead of calling
+ * this function with @val equals %NULL and @nval equals 0.
+ *
* Return: number of values read on success if @val is non-NULL,
* number of values available on success if @val is NULL,
* %-EINVAL if given arguments are not valid,
@@ -371,14 +404,16 @@ int fwnode_property_read_string_array(const struct fwnode_handle *fwnode,
{
int ret;
+ if (IS_ERR_OR_NULL(fwnode))
+ return -EINVAL;
+
ret = fwnode_call_int_op(fwnode, property_read_string_array, propname,
val, nval);
- if (ret == -EINVAL && !IS_ERR_OR_NULL(fwnode) &&
- !IS_ERR_OR_NULL(fwnode->secondary))
- ret = fwnode_call_int_op(fwnode->secondary,
- property_read_string_array, propname,
- val, nval);
- return ret;
+ if (ret != -EINVAL)
+ return ret;
+
+ return fwnode_call_int_op(fwnode->secondary, property_read_string_array, propname,
+ val, nval);
}
EXPORT_SYMBOL_GPL(fwnode_property_read_string_array);
@@ -480,15 +515,19 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
{
int ret;
+ if (IS_ERR_OR_NULL(fwnode))
+ return -ENOENT;
+
ret = fwnode_call_int_op(fwnode, get_reference_args, prop, nargs_prop,
nargs, index, args);
+ if (ret == 0)
+ return ret;
- if (ret < 0 && !IS_ERR_OR_NULL(fwnode) &&
- !IS_ERR_OR_NULL(fwnode->secondary))
- ret = fwnode_call_int_op(fwnode->secondary, get_reference_args,
- prop, nargs_prop, nargs, index, args);
+ if (IS_ERR_OR_NULL(fwnode->secondary))
+ return ret;
- return ret;
+ return fwnode_call_int_op(fwnode->secondary, get_reference_args, prop, nargs_prop,
+ nargs, index, args);
}
EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args);
@@ -587,17 +626,17 @@ EXPORT_SYMBOL_GPL(fwnode_get_next_parent);
*/
struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode)
{
+ struct fwnode_handle *parent;
struct device *dev;
- fwnode_handle_get(fwnode);
- do {
- fwnode = fwnode_get_next_parent(fwnode);
- if (!fwnode)
- return NULL;
- dev = get_dev_from_fwnode(fwnode);
- } while (!dev);
- fwnode_handle_put(fwnode);
- return dev;
+ fwnode_for_each_parent_node(fwnode, parent) {
+ dev = get_dev_from_fwnode(parent);
+ if (dev) {
+ fwnode_handle_put(parent);
+ return dev;
+ }
+ }
+ return NULL;
}
/**
@@ -608,13 +647,11 @@ struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode)
*/
unsigned int fwnode_count_parents(const struct fwnode_handle *fwnode)
{
- struct fwnode_handle *__fwnode;
- unsigned int count;
-
- __fwnode = fwnode_get_parent(fwnode);
+ struct fwnode_handle *parent;
+ unsigned int count = 0;
- for (count = 0; __fwnode; count++)
- __fwnode = fwnode_get_next_parent(__fwnode);
+ fwnode_for_each_parent_node(fwnode, parent)
+ count++;
return count;
}
@@ -635,40 +672,43 @@ EXPORT_SYMBOL_GPL(fwnode_count_parents);
struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwnode,
unsigned int depth)
{
- unsigned int i;
+ struct fwnode_handle *parent;
- fwnode_handle_get(fwnode);
+ if (depth == 0)
+ return fwnode_handle_get(fwnode);
- for (i = 0; i < depth && fwnode; i++)
- fwnode = fwnode_get_next_parent(fwnode);
-
- return fwnode;
+ fwnode_for_each_parent_node(fwnode, parent) {
+ if (--depth == 0)
+ return parent;
+ }
+ return NULL;
}
EXPORT_SYMBOL_GPL(fwnode_get_nth_parent);
/**
- * fwnode_is_ancestor_of - Test if @test_ancestor is ancestor of @test_child
- * @test_ancestor: Firmware which is tested for being an ancestor
- * @test_child: Firmware which is tested for being the child
+ * fwnode_is_ancestor_of - Test if @ancestor is ancestor of @child
+ * @ancestor: Firmware which is tested for being an ancestor
+ * @child: Firmware which is tested for being the child
*
* A node is considered an ancestor of itself too.
*
- * Returns true if @test_ancestor is an ancestor of @test_child.
- * Otherwise, returns false.
+ * Returns true if @ancestor is an ancestor of @child. Otherwise, returns false.
*/
-bool fwnode_is_ancestor_of(struct fwnode_handle *test_ancestor,
- struct fwnode_handle *test_child)
+bool fwnode_is_ancestor_of(struct fwnode_handle *ancestor, struct fwnode_handle *child)
{
- if (!test_ancestor)
+ struct fwnode_handle *parent;
+
+ if (IS_ERR_OR_NULL(ancestor))
return false;
- fwnode_handle_get(test_child);
- while (test_child) {
- if (test_child == test_ancestor) {
- fwnode_handle_put(test_child);
+ if (child == ancestor)
+ return true;
+
+ fwnode_for_each_parent_node(child, parent) {
+ if (parent == ancestor) {
+ fwnode_handle_put(parent);
return true;
}
- test_child = fwnode_get_next_parent(test_child);
}
return false;
}
@@ -698,7 +738,7 @@ fwnode_get_next_available_child_node(const struct fwnode_handle *fwnode,
{
struct fwnode_handle *next_child = child;
- if (!fwnode)
+ if (IS_ERR_OR_NULL(fwnode))
return NULL;
do {
@@ -722,16 +762,16 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev,
const struct fwnode_handle *fwnode = dev_fwnode(dev);
struct fwnode_handle *next;
+ if (IS_ERR_OR_NULL(fwnode))
+ return NULL;
+
/* Try to find a child in primary fwnode */
next = fwnode_get_next_child_node(fwnode, child);
if (next)
return next;
/* When no more children in primary, continue with secondary */
- if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
- next = fwnode_get_next_child_node(fwnode->secondary, child);
-
- return next;
+ return fwnode_get_next_child_node(fwnode->secondary, child);
}
EXPORT_SYMBOL_GPL(device_get_next_child_node);
@@ -798,6 +838,9 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put);
*/
bool fwnode_device_is_available(const struct fwnode_handle *fwnode)
{
+ if (IS_ERR_OR_NULL(fwnode))
+ return false;
+
if (!fwnode_has_op(fwnode, device_is_available))
return true;
@@ -823,33 +866,16 @@ EXPORT_SYMBOL_GPL(device_get_child_node_count);
bool device_dma_supported(struct device *dev)
{
- const struct fwnode_handle *fwnode = dev_fwnode(dev);
-
- /* For DT, this is always supported.
- * For ACPI, this depends on CCA, which
- * is determined by the acpi_dma_supported().
- */
- if (is_of_node(fwnode))
- return true;
-
- return acpi_dma_supported(to_acpi_device_node(fwnode));
+ return fwnode_call_bool_op(dev_fwnode(dev), device_dma_supported);
}
EXPORT_SYMBOL_GPL(device_dma_supported);
enum dev_dma_attr device_get_dma_attr(struct device *dev)
{
- const struct fwnode_handle *fwnode = dev_fwnode(dev);
- enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED;
-
- if (is_of_node(fwnode)) {
- if (of_dma_is_coherent(to_of_node(fwnode)))
- attr = DEV_DMA_COHERENT;
- else
- attr = DEV_DMA_NON_COHERENT;
- } else
- attr = acpi_get_dma_attr(to_acpi_device_node(fwnode));
+ if (!fwnode_has_op(dev_fwnode(dev), device_get_dma_attr))
+ return DEV_DMA_NOT_SUPPORTED;
- return attr;
+ return fwnode_call_int_op(dev_fwnode(dev), device_get_dma_attr);
}
EXPORT_SYMBOL_GPL(device_get_dma_attr);
@@ -904,10 +930,7 @@ EXPORT_SYMBOL_GPL(device_get_phy_mode);
*/
void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index)
{
- if (IS_ENABLED(CONFIG_OF_ADDRESS) && is_of_node(fwnode))
- return of_iomap(to_of_node(fwnode), index);
-
- return NULL;
+ return fwnode_call_ptr_op(fwnode, iomap, index);
}
EXPORT_SYMBOL(fwnode_iomap);
@@ -921,17 +944,7 @@ EXPORT_SYMBOL(fwnode_iomap);
*/
int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index)
{
- struct resource res;
- int ret;
-
- if (is_of_node(fwnode))
- return of_irq_get(to_of_node(fwnode), index);
-
- ret = acpi_irq_get(ACPI_HANDLE_FWNODE(fwnode), index, &res);
- if (ret)
- return ret;
-
- return res.start;
+ return fwnode_call_int_op(fwnode, irq_get, index);
}
EXPORT_SYMBOL(fwnode_irq_get);
@@ -988,14 +1001,14 @@ fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode,
parent = fwnode_graph_get_port_parent(prev);
else
parent = fwnode;
+ if (IS_ERR_OR_NULL(parent))
+ return NULL;
ep = fwnode_call_ptr_op(parent, graph_get_next_endpoint, prev);
+ if (ep)
+ return ep;
- if (IS_ERR_OR_NULL(ep) &&
- !IS_ERR_OR_NULL(parent) && !IS_ERR_OR_NULL(parent->secondary))
- ep = fwnode_graph_get_next_endpoint(parent->secondary, NULL);
-
- return ep;
+ return fwnode_graph_get_next_endpoint(parent->secondary, NULL);
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index b4df36c7b17d..da8996e7a1f1 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -110,6 +110,10 @@ struct regmap {
int (*reg_write)(void *context, unsigned int reg, unsigned int val);
int (*reg_update_bits)(void *context, unsigned int reg,
unsigned int mask, unsigned int val);
+ /* Bulk read/write */
+ int (*read)(void *context, const void *reg_buf, size_t reg_size,
+ void *val_buf, size_t val_size);
+ int (*write)(void *context, const void *data, size_t count);
bool defer_caching;
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index f2469d3435ca..d0f5bc827978 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -183,8 +183,8 @@ int regcache_init(struct regmap *map, const struct regmap_config *config)
return 0;
}
- if (!map->max_register)
- map->max_register = map->num_reg_defaults_raw;
+ if (!map->max_register && map->num_reg_defaults_raw)
+ map->max_register = (map->num_reg_defaults_raw - 1) * map->reg_stride;
if (map->cache_ops->init) {
dev_dbg(map->dev, "Initializing %s cache\n",
diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c
index 1578fb506683..0328b0b34284 100644
--- a/drivers/base/regmap/regmap-i3c.c
+++ b/drivers/base/regmap/regmap-i3c.c
@@ -40,7 +40,7 @@ static int regmap_i3c_read(void *context,
return i3c_device_do_priv_xfers(i3c, xfers, 2);
}
-static struct regmap_bus regmap_i3c = {
+static const struct regmap_bus regmap_i3c = {
.write = regmap_i3c_write,
.read = regmap_i3c_read,
};
diff --git a/drivers/base/regmap/regmap-sccb.c b/drivers/base/regmap/regmap-sccb.c
index 597042e2d009..986af26d88c2 100644
--- a/drivers/base/regmap/regmap-sccb.c
+++ b/drivers/base/regmap/regmap-sccb.c
@@ -80,7 +80,7 @@ static int regmap_sccb_write(void *context, unsigned int reg, unsigned int val)
return i2c_smbus_write_byte_data(i2c, reg, val);
}
-static struct regmap_bus regmap_sccb_bus = {
+static const struct regmap_bus regmap_sccb_bus = {
.reg_write = regmap_sccb_write,
.reg_read = regmap_sccb_read,
};
diff --git a/drivers/base/regmap/regmap-sdw-mbq.c b/drivers/base/regmap/regmap-sdw-mbq.c
index fe3ac26b66ad..388c3a087bd9 100644
--- a/drivers/base/regmap/regmap-sdw-mbq.c
+++ b/drivers/base/regmap/regmap-sdw-mbq.c
@@ -42,7 +42,7 @@ static int regmap_sdw_mbq_read(void *context, unsigned int reg, unsigned int *va
return 0;
}
-static struct regmap_bus regmap_sdw_mbq = {
+static const struct regmap_bus regmap_sdw_mbq = {
.reg_read = regmap_sdw_mbq_read,
.reg_write = regmap_sdw_mbq_write,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
diff --git a/drivers/base/regmap/regmap-sdw.c b/drivers/base/regmap/regmap-sdw.c
index 966de8a136d9..81b0327f719d 100644
--- a/drivers/base/regmap/regmap-sdw.c
+++ b/drivers/base/regmap/regmap-sdw.c
@@ -30,7 +30,7 @@ static int regmap_sdw_read(void *context, unsigned int reg, unsigned int *val)
return 0;
}
-static struct regmap_bus regmap_sdw = {
+static const struct regmap_bus regmap_sdw = {
.reg_read = regmap_sdw_read,
.reg_write = regmap_sdw_write,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
diff --git a/drivers/base/regmap/regmap-slimbus.c b/drivers/base/regmap/regmap-slimbus.c
index 0968059f1ef5..8075db788b39 100644
--- a/drivers/base/regmap/regmap-slimbus.c
+++ b/drivers/base/regmap/regmap-slimbus.c
@@ -22,7 +22,7 @@ static int regmap_slimbus_read(void *context, const void *reg, size_t reg_size,
return slim_read(sdev, *(u16 *)reg, val_size, val);
}
-static struct regmap_bus regmap_slimbus_bus = {
+static const struct regmap_bus regmap_slimbus_bus = {
.write = regmap_slimbus_write,
.read = regmap_slimbus_read,
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
diff --git a/drivers/base/regmap/regmap-w1.c b/drivers/base/regmap/regmap-w1.c
index 1fbaaad71ca5..3a8b402db852 100644
--- a/drivers/base/regmap/regmap-w1.c
+++ b/drivers/base/regmap/regmap-w1.c
@@ -172,17 +172,17 @@ static int w1_reg_a16_v16_write(void *context, unsigned int reg,
* Various types of supported bus addressing
*/
-static struct regmap_bus regmap_w1_bus_a8_v8 = {
+static const struct regmap_bus regmap_w1_bus_a8_v8 = {
.reg_read = w1_reg_a8_v8_read,
.reg_write = w1_reg_a8_v8_write,
};
-static struct regmap_bus regmap_w1_bus_a8_v16 = {
+static const struct regmap_bus regmap_w1_bus_a8_v16 = {
.reg_read = w1_reg_a8_v16_read,
.reg_write = w1_reg_a8_v16_write,
};
-static struct regmap_bus regmap_w1_bus_a16_v16 = {
+static const struct regmap_bus regmap_w1_bus_a16_v16 = {
.reg_read = w1_reg_a16_v16_read,
.reg_write = w1_reg_a16_v16_write,
};
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 5e12f7cb5147..2221d9863831 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -838,12 +838,15 @@ struct regmap *__regmap_init(struct device *dev,
map->reg_stride_order = ilog2(map->reg_stride);
else
map->reg_stride_order = -1;
- map->use_single_read = config->use_single_read || !bus || !bus->read;
- map->use_single_write = config->use_single_write || !bus || !bus->write;
- map->can_multi_write = config->can_multi_write && bus && bus->write;
+ map->use_single_read = config->use_single_read || !(config->read || (bus && bus->read));
+ map->use_single_write = config->use_single_write || !(config->write || (bus && bus->write));
+ map->can_multi_write = config->can_multi_write && (config->write || (bus && bus->write));
if (bus) {
map->max_raw_read = bus->max_raw_read;
map->max_raw_write = bus->max_raw_write;
+ } else if (config->max_raw_read && config->max_raw_write) {
+ map->max_raw_read = config->max_raw_read;
+ map->max_raw_write = config->max_raw_write;
}
map->dev = dev;
map->bus = bus;
@@ -877,7 +880,16 @@ struct regmap *__regmap_init(struct device *dev,
map->read_flag_mask = bus->read_flag_mask;
}
- if (!bus) {
+ if (config && config->read && config->write) {
+ map->reg_read = _regmap_bus_read;
+
+ /* Bulk read/write */
+ map->read = config->read;
+ map->write = config->write;
+
+ reg_endian = REGMAP_ENDIAN_NATIVE;
+ val_endian = REGMAP_ENDIAN_NATIVE;
+ } else if (!bus) {
map->reg_read = config->reg_read;
map->reg_write = config->reg_write;
map->reg_update_bits = config->reg_update_bits;
@@ -894,10 +906,13 @@ struct regmap *__regmap_init(struct device *dev,
} else {
map->reg_read = _regmap_bus_read;
map->reg_update_bits = bus->reg_update_bits;
- }
+ /* Bulk read/write */
+ map->read = bus->read;
+ map->write = bus->write;
- reg_endian = regmap_get_reg_endian(bus, config);
- val_endian = regmap_get_val_endian(dev, bus, config);
+ reg_endian = regmap_get_reg_endian(bus, config);
+ val_endian = regmap_get_val_endian(dev, bus, config);
+ }
switch (config->reg_bits + map->reg_shift) {
case 2:
@@ -1671,8 +1686,6 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
size_t len;
int i;
- WARN_ON(!map->bus);
-
/* Check for unwritable or noinc registers in range
* before we start
*/
@@ -1754,7 +1767,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
val = work_val;
}
- if (map->async && map->bus->async_write) {
+ if (map->async && map->bus && map->bus->async_write) {
struct regmap_async *async;
trace_regmap_async_write_start(map, reg, val_len);
@@ -1822,11 +1835,11 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
* write.
*/
if (val == work_val)
- ret = map->bus->write(map->bus_context, map->work_buf,
- map->format.reg_bytes +
- map->format.pad_bytes +
- val_len);
- else if (map->bus->gather_write)
+ ret = map->write(map->bus_context, map->work_buf,
+ map->format.reg_bytes +
+ map->format.pad_bytes +
+ val_len);
+ else if (map->bus && map->bus->gather_write)
ret = map->bus->gather_write(map->bus_context, map->work_buf,
map->format.reg_bytes +
map->format.pad_bytes,
@@ -1844,7 +1857,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
memcpy(buf, map->work_buf, map->format.reg_bytes);
memcpy(buf + map->format.reg_bytes + map->format.pad_bytes,
val, val_len);
- ret = map->bus->write(map->bus_context, buf, len);
+ ret = map->write(map->bus_context, buf, len);
kfree(buf);
} else if (ret != 0 && !map->cache_bypass && map->format.parse_val) {
@@ -1901,7 +1914,7 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
struct regmap_range_node *range;
struct regmap *map = context;
- WARN_ON(!map->bus || !map->format.format_write);
+ WARN_ON(!map->format.format_write);
range = _regmap_range_lookup(map, reg);
if (range) {
@@ -1916,8 +1929,7 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
trace_regmap_hw_write_start(map, reg, 1);
- ret = map->bus->write(map->bus_context, map->work_buf,
- map->format.buf_size);
+ ret = map->write(map->bus_context, map->work_buf, map->format.buf_size);
trace_regmap_hw_write_done(map, reg, 1);
@@ -1937,7 +1949,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
{
struct regmap *map = context;
- WARN_ON(!map->bus || !map->format.format_val);
+ WARN_ON(!map->format.format_val);
map->format.format_val(map->work_buf + map->format.reg_bytes
+ map->format.pad_bytes, val, 0);
@@ -1951,7 +1963,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
static inline void *_regmap_map_get_context(struct regmap *map)
{
- return (map->bus) ? map : map->bus_context;
+ return (map->bus || (!map->bus && map->read)) ? map : map->bus_context;
}
int _regmap_write(struct regmap *map, unsigned int reg,
@@ -2363,7 +2375,7 @@ static int _regmap_raw_multi_reg_write(struct regmap *map,
u8 = buf;
*u8 |= map->write_flag_mask;
- ret = map->bus->write(map->bus_context, buf, len);
+ ret = map->write(map->bus_context, buf, len);
kfree(buf);
@@ -2669,9 +2681,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
struct regmap_range_node *range;
int ret;
- WARN_ON(!map->bus);
-
- if (!map->bus || !map->bus->read)
+ if (!map->read)
return -EINVAL;
range = _regmap_range_lookup(map, reg);
@@ -2689,9 +2699,9 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
map->read_flag_mask);
trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes);
- ret = map->bus->read(map->bus_context, map->work_buf,
- map->format.reg_bytes + map->format.pad_bytes,
- val, val_len);
+ ret = map->read(map->bus_context, map->work_buf,
+ map->format.reg_bytes + map->format.pad_bytes,
+ val, val_len);
trace_regmap_hw_read_done(map, reg, val_len / map->format.val_bytes);
@@ -2802,8 +2812,6 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
unsigned int v;
int ret, i;
- if (!map->bus)
- return -EINVAL;
if (val_len % map->format.val_bytes)
return -EINVAL;
if (!IS_ALIGNED(reg, map->reg_stride))
@@ -2818,7 +2826,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
size_t chunk_count, chunk_bytes;
size_t chunk_regs = val_count;
- if (!map->bus->read) {
+ if (!map->read) {
ret = -ENOTSUPP;
goto out;
}
@@ -2878,7 +2886,7 @@ EXPORT_SYMBOL_GPL(regmap_raw_read);
* @val: Pointer to data buffer
* @val_len: Length of output buffer in bytes.
*
- * The regmap API usually assumes that bulk bus read operations will read a
+ * The regmap API usually assumes that bulk read operations will read a
* range of registers. Some devices have certain registers for which a read
* operation read will read from an internal FIFO.
*
@@ -2896,10 +2904,6 @@ int regmap_noinc_read(struct regmap *map, unsigned int reg,
size_t read_len;
int ret;
- if (!map->bus)
- return -EINVAL;
- if (!map->bus->read)
- return -ENOTSUPP;
if (val_len % map->format.val_bytes)
return -EINVAL;
if (!IS_ALIGNED(reg, map->reg_stride))
@@ -3013,7 +3017,7 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
if (val_count == 0)
return -EINVAL;
- if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
+ if (map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
if (ret != 0)
return ret;
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index e9d1efcda89b..ac6ad9ab67f9 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -152,9 +152,19 @@ static struct attribute *default_attrs[] = {
NULL
};
+static umode_t topology_is_visible(struct kobject *kobj,
+ struct attribute *attr, int unused)
+{
+ if (attr == &dev_attr_ppin.attr && !topology_ppin(kobj_to_dev(kobj)->id))
+ return 0;
+
+ return attr->mode;
+}
+
static const struct attribute_group topology_attr_group = {
.attrs = default_attrs,
.bin_attrs = bin_attrs,
+ .is_visible = topology_is_visible,
.name = "topology"
};
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