diff options
| -rw-r--r-- | drivers/input/mouse/cyapa.c | 188 | ||||
| -rw-r--r-- | drivers/input/mouse/cyapa.h | 2 |
2 files changed, 189 insertions, 1 deletions
diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 63f6646faf5f..3c72409fbc5f 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -23,6 +23,7 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/uaccess.h> +#include <linux/pm_runtime.h> #include "cyapa.h" @@ -357,6 +358,10 @@ static int cyapa_open(struct input_dev *input) } enable_irq(client->irq); + if (!pm_runtime_enabled(&client->dev)) { + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); + } out: mutex_unlock(&cyapa->state_sync_lock); return error; @@ -370,6 +375,10 @@ static void cyapa_close(struct input_dev *input) mutex_lock(&cyapa->state_sync_lock); disable_irq(client->irq); + if (pm_runtime_enabled(&client->dev)) + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + if (cyapa->operational) cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); @@ -539,6 +548,9 @@ static int cyapa_reinitialize(struct cyapa *cyapa) struct input_dev *input = cyapa->input; int error; + if (pm_runtime_enabled(dev)) + pm_runtime_disable(dev); + /* Avoid command failures when TP was in OFF state. */ if (cyapa->operational) cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); @@ -561,6 +573,13 @@ out: /* Reset to power OFF state to save power when no user open. */ if (cyapa->operational) cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); + } else if (!error && cyapa->operational) { + /* + * Make sure only enable runtime PM when device is + * in operational mode and input->users > 0. + */ + pm_runtime_set_active(dev); + pm_runtime_enable(dev); } return error; @@ -571,6 +590,7 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id) struct cyapa *cyapa = dev_id; struct device *dev = &cyapa->client->dev; + pm_runtime_get_sync(dev); if (device_may_wakeup(dev)) pm_wakeup_event(dev, 0); @@ -601,6 +621,8 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id) } out: + pm_runtime_mark_last_busy(dev); + pm_runtime_put_sync_autosuspend(dev); return IRQ_HANDLED; } @@ -734,6 +756,127 @@ static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) } #endif /* CONFIG_PM_SLEEP */ +#ifdef CONFIG_PM +static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + u8 pwr_cmd; + u16 sleep_time; + int error; + + error = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (error) + return error; + + pwr_cmd = cyapa->runtime_suspend_power_mode; + sleep_time = cyapa->runtime_suspend_sleep_time; + + mutex_unlock(&cyapa->state_sync_lock); + + return scnprintf(buf, PAGE_SIZE, "%u\n", + cyapa->gen == CYAPA_GEN3 ? + cyapa_pwr_cmd_to_sleep_time(pwr_cmd) : + sleep_time); +} + +static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + u16 time; + int error; + + if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) { + dev_err(dev, "invalid runtime suspend scanrate ms parameter\n"); + return -EINVAL; + } + + /* + * When the suspend scanrate is changed, pm_runtime_get to resume + * a potentially suspended device, update to the new pwr_cmd + * and then pm_runtime_put to suspend into the new power mode. + */ + pm_runtime_get_sync(dev); + + error = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (error) + return error; + + cyapa->runtime_suspend_sleep_time = max_t(u16, time, 1000); + cyapa->runtime_suspend_power_mode = + cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time); + + mutex_unlock(&cyapa->state_sync_lock); + + pm_runtime_put_sync_autosuspend(dev); + + return count; +} + +static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR, + cyapa_show_rt_suspend_scanrate, + cyapa_update_rt_suspend_scanrate); + +static struct attribute *cyapa_power_runtime_entries[] = { + &dev_attr_runtime_suspend_scanrate_ms.attr, + NULL, +}; + +static const struct attribute_group cyapa_power_runtime_group = { + .name = power_group_name, + .attrs = cyapa_power_runtime_entries, +}; + +static void cyapa_remove_power_runtime_group(void *data) +{ + struct cyapa *cyapa = data; + + sysfs_unmerge_group(&cyapa->client->dev.kobj, + &cyapa_power_runtime_group); +} + +static int cyapa_start_runtime(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + int error; + + cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; + cyapa->runtime_suspend_sleep_time = + cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); + + error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group); + if (error) { + dev_err(dev, + "failed to create power runtime group: %d\n", error); + return error; + } + + error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa); + if (error) { + cyapa_remove_power_runtime_group(cyapa); + dev_err(dev, + "failed to add power runtime cleanup action: %d\n", + error); + return error; + } + + /* runtime is enabled until device is operational and opened. */ + pm_runtime_set_suspended(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); + + return 0; +} +#else +static inline int cyapa_start_runtime(struct cyapa *cyapa) +{ + return 0; +} +#endif /* CONFIG_PM */ + static int cyapa_probe(struct i2c_client *client, const struct i2c_device_id *dev_id) { @@ -779,6 +922,12 @@ static int cyapa_probe(struct i2c_client *client, return error; } + error = cyapa_start_runtime(cyapa); + if (error) { + dev_err(dev, "failed to start pm_runtime: %d\n", error); + return error; + } + error = devm_request_threaded_irq(dev, client->irq, NULL, cyapa_irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, @@ -819,6 +968,13 @@ static int __maybe_unused cyapa_suspend(struct device *dev) if (error) return error; + /* + * Runtime PM is enable only when device is in operational mode and + * users in use, so need check it before disable it to + * avoid unbalance warning. + */ + if (pm_runtime_enabled(dev)) + pm_runtime_disable(dev); disable_irq(client->irq); /* @@ -855,6 +1011,7 @@ static int __maybe_unused cyapa_resume(struct device *dev) cyapa->irq_wake = false; } + /* Update device states and runtime PM states. */ error = cyapa_reinitialize(cyapa); if (error) dev_warn(dev, "failed to reinitialize TP device: %d\n", error); @@ -865,7 +1022,36 @@ static int __maybe_unused cyapa_resume(struct device *dev) return 0; } -static SIMPLE_DEV_PM_OPS(cyapa_pm_ops, cyapa_suspend, cyapa_resume); +static int __maybe_unused cyapa_runtime_suspend(struct device *dev) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int error; + + error = cyapa->ops->set_power_mode(cyapa, + cyapa->runtime_suspend_power_mode, + cyapa->runtime_suspend_sleep_time); + if (error) + dev_warn(dev, "runtime suspend failed: %d\n", error); + + return 0; +} + +static int __maybe_unused cyapa_runtime_resume(struct device *dev) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int error; + + error = cyapa->ops->set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE, 0); + if (error) + dev_warn(dev, "runtime resume failed: %d\n", error); + + return 0; +} + +static const struct dev_pm_ops cyapa_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume) + SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL) +}; static const struct i2c_device_id cyapa_id_table[] = { { "cyapa", 0 }, diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h index 481a60d51efd..51fcdb2a11a6 100644 --- a/drivers/input/mouse/cyapa.h +++ b/drivers/input/mouse/cyapa.h @@ -242,6 +242,8 @@ struct cyapa { /* power mode settings */ u8 suspend_power_mode; u16 suspend_sleep_time; + u8 runtime_suspend_power_mode; + u16 runtime_suspend_sleep_time; u8 dev_pwr_mode; u16 dev_sleep_time; |