diff options
Diffstat (limited to 'drivers/pmdomain/core.c')
| -rw-r--r-- | drivers/pmdomain/core.c | 486 |
1 files changed, 410 insertions, 76 deletions
diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index a6c8b85dd024..bf82775f6a67 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -27,6 +27,16 @@ /* Provides a unique ID for each genpd device */ static DEFINE_IDA(genpd_ida); +/* The bus for genpd_providers. */ +static const struct bus_type genpd_provider_bus_type = { + .name = "genpd_provider", +}; + +/* The parent for genpd_provider devices. */ +static struct device genpd_provider_bus = { + .init_name = "genpd_provider", +}; + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ @@ -176,6 +186,8 @@ static const struct genpd_lock_ops genpd_raw_spin_ops = { #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON) #define genpd_is_opp_table_fw(genpd) (genpd->flags & GENPD_FLAG_OPP_TABLE_FW) #define genpd_is_dev_name_fw(genpd) (genpd->flags & GENPD_FLAG_DEV_NAME_FW) +#define genpd_is_no_sync_state(genpd) (genpd->flags & GENPD_FLAG_NO_SYNC_STATE) +#define genpd_is_no_stay_on(genpd) (genpd->flags & GENPD_FLAG_NO_STAY_ON) static inline bool irq_safe_dev_in_sleep_domain(struct device *dev, const struct generic_pm_domain *genpd) @@ -304,10 +316,40 @@ static void genpd_update_accounting(struct generic_pm_domain *genpd) genpd->accounting_time = now; } + +static void genpd_reflect_residency(struct generic_pm_domain *genpd) +{ + struct genpd_governor_data *gd = genpd->gd; + struct genpd_power_state *state, *next_state; + unsigned int state_idx; + s64 sleep_ns, target_ns; + + if (!gd || !gd->reflect_residency) + return; + + sleep_ns = ktime_to_ns(ktime_sub(ktime_get(), gd->last_enter)); + state_idx = genpd->state_idx; + state = &genpd->states[state_idx]; + target_ns = state->power_off_latency_ns + state->residency_ns; + + if (sleep_ns < target_ns) { + state->above++; + } else if (state_idx < (genpd->state_count -1)) { + next_state = &genpd->states[state_idx + 1]; + target_ns = next_state->power_off_latency_ns + + next_state->residency_ns; + + if (sleep_ns >= target_ns) + state->below++; + } + + gd->reflect_residency = false; +} #else static inline void genpd_debug_add(struct generic_pm_domain *genpd) {} static inline void genpd_debug_remove(struct generic_pm_domain *genpd) {} static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {} +static inline void genpd_reflect_residency(struct generic_pm_domain *genpd) {} #endif static int _genpd_reeval_performance_state(struct generic_pm_domain *genpd, @@ -697,6 +739,95 @@ bool dev_pm_genpd_get_hwmode(struct device *dev) } EXPORT_SYMBOL_GPL(dev_pm_genpd_get_hwmode); +/** + * dev_pm_genpd_rpm_always_on() - Control if the PM domain can be powered off. + * + * @dev: Device for which the PM domain may need to stay on for. + * @on: Value to set or unset for the condition. + * + * For some usecases a consumer driver requires its device to remain power-on + * from the PM domain perspective during runtime. This function allows the + * behaviour to be dynamically controlled for a device attached to a genpd. + * + * It is assumed that the users guarantee that the genpd wouldn't be detached + * while this routine is getting called. + * + * Return: Returns 0 on success and negative error values on failures. + */ +int dev_pm_genpd_rpm_always_on(struct device *dev, bool on) +{ + struct generic_pm_domain *genpd; + + genpd = dev_to_genpd_safe(dev); + if (!genpd) + return -ENODEV; + + genpd_lock(genpd); + dev_gpd_data(dev)->rpm_always_on = on; + genpd_unlock(genpd); + + return 0; +} +EXPORT_SYMBOL_GPL(dev_pm_genpd_rpm_always_on); + +/** + * dev_pm_genpd_is_on() - Get device's current power domain status + * + * @dev: Device to get the current power status + * + * This function checks whether the generic power domain associated with the + * given device is on or not by verifying if genpd_status_on equals + * GENPD_STATE_ON. + * + * Note: this function returns the power status of the genpd at the time of the + * call. The power status may change after due to activity from other devices + * sharing the same genpd. Therefore, this information should not be relied for + * long-term decisions about the device power state. + * + * Return: 'true' if the device's power domain is on, 'false' otherwise. + */ +bool dev_pm_genpd_is_on(struct device *dev) +{ + struct generic_pm_domain *genpd; + bool is_on; + + genpd = dev_to_genpd_safe(dev); + if (!genpd) + return false; + + genpd_lock(genpd); + is_on = genpd_status_on(genpd); + genpd_unlock(genpd); + + return is_on; +} +EXPORT_SYMBOL_GPL(dev_pm_genpd_is_on); + +/** + * pm_genpd_inc_rejected() - Adjust the rejected/usage counts for an idle-state. + * + * @genpd: The PM domain the idle-state belongs to. + * @state_idx: The index of the idle-state that failed. + * + * In some special cases the ->power_off() callback is asynchronously powering + * off the PM domain, leading to that it may return zero to indicate success, + * even though the actual power-off could fail. To account for this correctly in + * the rejected/usage counts for the idle-state statistics, users can call this + * function to adjust the values. + * + * It is assumed that the users guarantee that the genpd doesn't get removed + * while this routine is getting called. + */ +void pm_genpd_inc_rejected(struct generic_pm_domain *genpd, + unsigned int state_idx) +{ + genpd_lock(genpd); + genpd->states[genpd->state_idx].rejected++; + genpd->states[genpd->state_idx].usage--; + genpd_unlock(genpd); +} +EXPORT_SYMBOL_GPL(pm_genpd_inc_rejected); + static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) { unsigned int state_idx = genpd->state_idx; @@ -822,31 +953,25 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd) * If all of the @genpd's devices have been suspended and all of its subdomains * have been powered down, remove power from @genpd. */ -static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, - unsigned int depth) +static void genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, + unsigned int depth) { struct pm_domain_data *pdd; struct gpd_link *link; unsigned int not_suspended = 0; - int ret; /* * Do not try to power off the domain in the following situations: - * (1) The domain is already in the "power off" state. - * (2) System suspend is in progress. + * The domain is already in the "power off" state. + * System suspend is in progress. + * The domain is configured as always on. + * The domain was on at boot and still need to stay on. + * The domain has a subdomain being powered on. */ - if (!genpd_status_on(genpd) || genpd->prepared_count > 0) - return 0; - - /* - * Abort power off for the PM domain in the following situations: - * (1) The domain is configured as always on. - * (2) When the domain has a subdomain being powered on. - */ - if (genpd_is_always_on(genpd) || - genpd_is_rpm_always_on(genpd) || - atomic_read(&genpd->sd_count) > 0) - return -EBUSY; + if (!genpd_status_on(genpd) || genpd->prepared_count > 0 || + genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd) || + genpd->stay_on || atomic_read(&genpd->sd_count) > 0) + return; /* * The children must be in their deepest (powered-off) states to allow @@ -857,7 +982,7 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, list_for_each_entry(link, &genpd->parent_links, parent_node) { struct generic_pm_domain *child = link->child; if (child->state_idx < child->state_count - 1) - return -EBUSY; + return; } list_for_each_entry(pdd, &genpd->dev_list, list_node) { @@ -868,14 +993,18 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, if (!pm_runtime_suspended(pdd->dev) || irq_safe_dev_in_sleep_domain(pdd->dev, genpd)) not_suspended++; + + /* The device may need its PM domain to stay powered on. */ + if (to_gpd_data(pdd)->rpm_always_on) + return; } if (not_suspended > 1 || (not_suspended == 1 && !one_dev_on)) - return -EBUSY; + return; if (genpd->gov && genpd->gov->power_down_ok) { if (!genpd->gov->power_down_ok(&genpd->domain)) - return -EAGAIN; + return; } /* Default to shallowest state. */ @@ -884,12 +1013,11 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, /* Don't power off, if a child domain is waiting to power on. */ if (atomic_read(&genpd->sd_count) > 0) - return -EBUSY; + return; - ret = _genpd_power_off(genpd, true); - if (ret) { + if (_genpd_power_off(genpd, true)) { genpd->states[genpd->state_idx].rejected++; - return ret; + return; } genpd->status = GENPD_STATE_OFF; @@ -902,8 +1030,6 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, genpd_power_off(link->parent, false, depth + 1); genpd_unlock(link->parent); } - - return 0; } /** @@ -922,6 +1048,9 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth) if (genpd_status_on(genpd)) return 0; + /* Reflect over the entered idle-states residency for debugfs. */ + genpd_reflect_residency(genpd); + /* * The list is guaranteed not to change while the loop below is being * executed, unless one of the parents' .power_on() callbacks fiddles @@ -1252,8 +1381,9 @@ static int __init genpd_power_off_unused(void) pr_info("genpd: Disabling unused power domains\n"); mutex_lock(&gpd_list_lock); - list_for_each_entry(genpd, &gpd_list, gpd_list_node) + list_for_each_entry(genpd, &gpd_list, gpd_list_node) { genpd_queue_power_off_work(genpd); + } mutex_unlock(&gpd_list_lock); @@ -1295,8 +1425,14 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock, return; } - /* Choose the deepest state when suspending */ - genpd->state_idx = genpd->state_count - 1; + if (genpd->gov && genpd->gov->system_power_down_ok) { + if (!genpd->gov->system_power_down_ok(&genpd->domain)) + return; + } else { + /* Default to the deepest state. */ + genpd->state_idx = genpd->state_count - 1; + } + if (_genpd_power_off(genpd, false)) { genpd->states[genpd->state_idx].rejected++; return; @@ -1415,7 +1551,8 @@ static int genpd_finish_suspend(struct device *dev, if (ret) return ret; - if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd)) + if (device_awake_path(dev) && genpd_is_active_wakeup(genpd) && + !device_out_band_wakeup(dev)) return 0; if (genpd->dev_ops.stop && genpd->dev_ops.start && @@ -1470,7 +1607,8 @@ static int genpd_finish_resume(struct device *dev, if (IS_ERR(genpd)) return -EINVAL; - if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd)) + if (device_awake_path(dev) && genpd_is_active_wakeup(genpd) && + !device_out_band_wakeup(dev)) return resume_noirq(dev); genpd_lock(genpd); @@ -2142,6 +2280,11 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd) return 0; } +static void genpd_provider_release(struct device *dev) +{ + /* nothing to be done here */ +} + static int genpd_alloc_data(struct generic_pm_domain *genpd) { struct genpd_governor_data *gd = NULL; @@ -2172,8 +2315,29 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd) } genpd->gd = gd; - return 0; + device_initialize(&genpd->dev); + genpd->dev.release = genpd_provider_release; + genpd->dev.bus = &genpd_provider_bus_type; + genpd->dev.parent = &genpd_provider_bus; + if (!genpd_is_dev_name_fw(genpd)) { + dev_set_name(&genpd->dev, "%s", genpd->name); + } else { + ret = ida_alloc(&genpd_ida, GFP_KERNEL); + if (ret < 0) + goto put; + + genpd->device_id = ret; + dev_set_name(&genpd->dev, "%s_%u", genpd->name, genpd->device_id); + } + + return 0; +put: + put_device(&genpd->dev); + if (genpd->free_states == genpd_free_default_power_state) { + kfree(genpd->states); + genpd->states = NULL; + } free: if (genpd_is_cpu_domain(genpd)) free_cpumask_var(genpd->cpus); @@ -2183,6 +2347,9 @@ free: static void genpd_free_data(struct generic_pm_domain *genpd) { + put_device(&genpd->dev); + if (genpd->device_id != -ENXIO) + ida_free(&genpd_ida, genpd->device_id); if (genpd_is_cpu_domain(genpd)) free_cpumask_var(genpd->cpus); if (genpd->free_states) @@ -2204,6 +2371,18 @@ static void genpd_lock_init(struct generic_pm_domain *genpd) } } +#ifdef CONFIG_PM_GENERIC_DOMAINS_OF +static void genpd_set_stay_on(struct generic_pm_domain *genpd, bool is_off) +{ + genpd->stay_on = !genpd_is_no_stay_on(genpd) && !is_off; +} +#else +static void genpd_set_stay_on(struct generic_pm_domain *genpd, bool is_off) +{ + genpd->stay_on = false; +} +#endif + /** * pm_genpd_init - Initialize a generic I/O PM domain object. * @genpd: PM domain object to initialize. @@ -2229,10 +2408,13 @@ int pm_genpd_init(struct generic_pm_domain *genpd, INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); atomic_set(&genpd->sd_count, 0); genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; + genpd_set_stay_on(genpd, is_off); + genpd->sync_state = GENPD_SYNC_STATE_OFF; genpd->device_count = 0; genpd->provider = NULL; genpd->device_id = -ENXIO; genpd->has_provider = false; + genpd->opp_table = NULL; genpd->accounting_time = ktime_get_mono_fast_ns(); genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; genpd->domain.ops.runtime_resume = genpd_runtime_resume; @@ -2271,20 +2453,6 @@ int pm_genpd_init(struct generic_pm_domain *genpd, if (ret) return ret; - device_initialize(&genpd->dev); - - if (!genpd_is_dev_name_fw(genpd)) { - dev_set_name(&genpd->dev, "%s", genpd->name); - } else { - ret = ida_alloc(&genpd_ida, GFP_KERNEL); - if (ret < 0) { - put_device(&genpd->dev); - return ret; - } - genpd->device_id = ret; - dev_set_name(&genpd->dev, "%s_%u", genpd->name, genpd->device_id); - } - mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); @@ -2325,8 +2493,6 @@ 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->device_id != -ENXIO) - ida_free(&genpd_ida, genpd->device_id); genpd_free_data(genpd); pr_debug("%s: removed %s\n", __func__, dev_name(&genpd->dev)); @@ -2396,6 +2562,8 @@ struct of_genpd_provider { static LIST_HEAD(of_genpd_providers); /* Mutex to protect the list above. */ static DEFINE_MUTEX(of_genpd_mutex); +/* Used to prevent registering devices before the bus. */ +static bool genpd_bus_registered; /** * genpd_xlate_simple() - Xlate function for direct node-domain mapping @@ -2462,7 +2630,7 @@ static int genpd_add_provider(struct device_node *np, genpd_xlate_t xlate, cp->node = of_node_get(np); cp->data = data; cp->xlate = xlate; - fwnode_dev_initialized(&np->fwnode, true); + fwnode_dev_initialized(of_fwnode_handle(np), true); mutex_lock(&of_genpd_mutex); list_add(&cp->link, &of_genpd_providers); @@ -2489,6 +2657,11 @@ static bool genpd_present(const struct generic_pm_domain *genpd) return ret; } +static void genpd_sync_state(struct device *dev) +{ + return of_genpd_sync_state(dev->of_node); +} + /** * of_genpd_add_provider_simple() - Register a simple PM domain provider * @np: Device node pointer associated with the PM domain provider. @@ -2497,21 +2670,43 @@ static bool genpd_present(const struct generic_pm_domain *genpd) int of_genpd_add_provider_simple(struct device_node *np, struct generic_pm_domain *genpd) { + struct fwnode_handle *fwnode; + struct device *dev; int ret; if (!np || !genpd) return -EINVAL; + if (!genpd_bus_registered) + return -ENODEV; + if (!genpd_present(genpd)) return -EINVAL; genpd->dev.of_node = np; + fwnode = of_fwnode_handle(np); + dev = get_dev_from_fwnode(fwnode); + if (!dev && !genpd_is_no_sync_state(genpd)) { + genpd->sync_state = GENPD_SYNC_STATE_SIMPLE; + device_set_node(&genpd->dev, fwnode); + } else { + dev_set_drv_sync_state(dev, genpd_sync_state); + } + + put_device(dev); + + ret = device_add(&genpd->dev); + if (ret) + return ret; + /* Parse genpd OPP table */ if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) { ret = dev_pm_opp_of_add_table(&genpd->dev); - if (ret) - return dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n"); + if (ret) { + dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n"); + goto err_del; + } /* * Save table for faster processing while setting performance @@ -2522,19 +2717,22 @@ int of_genpd_add_provider_simple(struct device_node *np, } ret = genpd_add_provider(np, genpd_xlate_simple, genpd); - if (ret) { - if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) { - dev_pm_opp_put_opp_table(genpd->opp_table); - dev_pm_opp_of_remove_table(&genpd->dev); - } - - return ret; - } + if (ret) + goto err_opp; - genpd->provider = &np->fwnode; + genpd->provider = fwnode; genpd->has_provider = true; return 0; + +err_opp: + if (genpd->opp_table) { + dev_pm_opp_put_opp_table(genpd->opp_table); + dev_pm_opp_of_remove_table(&genpd->dev); + } +err_del: + device_del(&genpd->dev); + return ret; } EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple); @@ -2547,15 +2745,30 @@ int of_genpd_add_provider_onecell(struct device_node *np, struct genpd_onecell_data *data) { struct generic_pm_domain *genpd; + struct fwnode_handle *fwnode; + struct device *dev; unsigned int i; int ret = -EINVAL; + bool sync_state = false; if (!np || !data) return -EINVAL; + if (!genpd_bus_registered) + return -ENODEV; + if (!data->xlate) data->xlate = genpd_xlate_onecell; + fwnode = of_fwnode_handle(np); + dev = get_dev_from_fwnode(fwnode); + if (!dev) + sync_state = true; + else + dev_set_drv_sync_state(dev, genpd_sync_state); + + put_device(dev); + for (i = 0; i < data->num_domains; i++) { genpd = data->domains[i]; @@ -2566,12 +2779,23 @@ int of_genpd_add_provider_onecell(struct device_node *np, genpd->dev.of_node = np; + if (sync_state && !genpd_is_no_sync_state(genpd)) { + genpd->sync_state = GENPD_SYNC_STATE_ONECELL; + device_set_node(&genpd->dev, fwnode); + sync_state = false; + } + + ret = device_add(&genpd->dev); + if (ret) + goto error; + /* Parse genpd OPP table */ if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) { ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i); if (ret) { dev_err_probe(&genpd->dev, ret, "Failed to add OPP table for index %d\n", i); + device_del(&genpd->dev); goto error; } @@ -2583,7 +2807,7 @@ int of_genpd_add_provider_onecell(struct device_node *np, WARN_ON(IS_ERR(genpd->opp_table)); } - genpd->provider = &np->fwnode; + genpd->provider = fwnode; genpd->has_provider = true; } @@ -2603,10 +2827,12 @@ error: genpd->provider = NULL; genpd->has_provider = false; - if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) { + if (genpd->opp_table) { dev_pm_opp_put_opp_table(genpd->opp_table); dev_pm_opp_of_remove_table(&genpd->dev); } + + device_del(&genpd->dev); } return ret; @@ -2632,18 +2858,19 @@ void of_genpd_del_provider(struct device_node *np) * so that the PM domain can be safely removed. */ list_for_each_entry(gpd, &gpd_list, gpd_list_node) { - if (gpd->provider == &np->fwnode) { + if (gpd->provider == of_fwnode_handle(np)) { gpd->has_provider = false; - if (genpd_is_opp_table_fw(gpd) || !gpd->set_performance_state) - continue; + if (gpd->opp_table) { + dev_pm_opp_put_opp_table(gpd->opp_table); + dev_pm_opp_of_remove_table(&gpd->dev); + } - dev_pm_opp_put_opp_table(gpd->opp_table); - dev_pm_opp_of_remove_table(&gpd->dev); + device_del(&gpd->dev); } } - fwnode_dev_initialized(&cp->node->fwnode, false); + fwnode_dev_initialized(of_fwnode_handle(cp->node), false); list_del(&cp->link); of_node_put(cp->node); kfree(cp); @@ -2822,7 +3049,7 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) mutex_lock(&gpd_list_lock); list_for_each_entry_safe(gpd, tmp, &gpd_list, gpd_list_node) { - if (gpd->provider == &np->fwnode) { + if (gpd->provider == of_fwnode_handle(np)) { ret = genpd_remove(gpd); genpd = ret ? ERR_PTR(ret) : gpd; break; @@ -3082,9 +3309,12 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, /* Verify that the index is within a valid range. */ num_domains = of_count_phandle_with_args(dev->of_node, "power-domains", "#power-domain-cells"); - if (index >= num_domains) + if (num_domains < 0 || index >= num_domains) return NULL; + if (!genpd_bus_registered) + return ERR_PTR(-ENODEV); + /* Allocate and register device on the genpd bus. */ virt_dev = kzalloc(sizeof(*virt_dev), GFP_KERNEL); if (!virt_dev) @@ -3171,9 +3401,11 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state, if (!err) genpd_state->residency_ns = 1000LL * residency; + of_property_read_string(state_node, "idle-state-name", &genpd_state->name); + genpd_state->power_on_latency_ns = 1000LL * exit_latency; genpd_state->power_off_latency_ns = 1000LL * entry_latency; - genpd_state->fwnode = &state_node->fwnode; + genpd_state->fwnode = of_fwnode_handle(state_node); return 0; } @@ -3259,9 +3491,103 @@ int of_genpd_parse_idle_states(struct device_node *dn, } EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states); +/** + * of_genpd_sync_state() - A common sync_state function for genpd providers + * @np: The device node the genpd provider is associated with. + * + * The @np that corresponds to a genpd provider may provide one or multiple + * genpds. This function makes use @np to find the genpds that belongs to the + * provider. For each genpd we try a power-off. + */ +void of_genpd_sync_state(struct device_node *np) +{ + struct generic_pm_domain *genpd; + + if (!np) + return; + + mutex_lock(&gpd_list_lock); + list_for_each_entry(genpd, &gpd_list, gpd_list_node) { + if (genpd->provider == of_fwnode_handle(np)) { + genpd_lock(genpd); + genpd->stay_on = false; + genpd_power_off(genpd, false, 0); + genpd_unlock(genpd); + } + } + mutex_unlock(&gpd_list_lock); +} +EXPORT_SYMBOL_GPL(of_genpd_sync_state); + +static int genpd_provider_probe(struct device *dev) +{ + return 0; +} + +static void genpd_provider_sync_state(struct device *dev) +{ + struct generic_pm_domain *genpd = container_of(dev, struct generic_pm_domain, dev); + + switch (genpd->sync_state) { + case GENPD_SYNC_STATE_OFF: + break; + + case GENPD_SYNC_STATE_ONECELL: + of_genpd_sync_state(dev->of_node); + break; + + case GENPD_SYNC_STATE_SIMPLE: + genpd_lock(genpd); + genpd->stay_on = false; + genpd_power_off(genpd, false, 0); + genpd_unlock(genpd); + break; + + default: + break; + } +} + +static struct device_driver genpd_provider_drv = { + .name = "genpd_provider", + .bus = &genpd_provider_bus_type, + .probe = genpd_provider_probe, + .sync_state = genpd_provider_sync_state, + .suppress_bind_attrs = true, +}; + static int __init genpd_bus_init(void) { - return bus_register(&genpd_bus_type); + int ret; + + ret = device_register(&genpd_provider_bus); + if (ret) { + put_device(&genpd_provider_bus); + return ret; + } + + ret = bus_register(&genpd_provider_bus_type); + if (ret) + goto err_dev; + + ret = bus_register(&genpd_bus_type); + if (ret) + goto err_prov_bus; + + ret = driver_register(&genpd_provider_drv); + if (ret) + goto err_bus; + + genpd_bus_registered = true; + return 0; + +err_bus: + bus_unregister(&genpd_bus_type); +err_prov_bus: + bus_unregister(&genpd_provider_bus_type); +err_dev: + device_unregister(&genpd_provider_bus); + return ret; } core_initcall(genpd_bus_init); @@ -3446,10 +3772,13 @@ static int idle_states_show(struct seq_file *s, void *data) if (ret) return -ERESTARTSYS; - seq_puts(s, "State Time Spent(ms) Usage Rejected\n"); + seq_puts(s, "State Time Spent(ms) Usage Rejected Above Below\n"); for (i = 0; i < genpd->state_count; i++) { - idle_time += genpd->states[i].idle_time; + struct genpd_power_state *state = &genpd->states[i]; + char state_name[15]; + + idle_time += state->idle_time; if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) { now = ktime_get_mono_fast_ns(); @@ -3459,9 +3788,14 @@ static int idle_states_show(struct seq_file *s, void *data) } } + if (!state->name) + snprintf(state_name, ARRAY_SIZE(state_name), "S%-13d", i); + 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); + seq_printf(s, "%-14s %-14llu %-10llu %-10llu %-10llu %llu\n", + state->name ?: state_name, idle_time, + state->usage, state->rejected, state->above, + state->below); } genpd_unlock(genpd); |