Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753987AbaGQGuO (ORCPT ); Thu, 17 Jul 2014 02:50:14 -0400 Received: from mail-pd0-f178.google.com ([209.85.192.178]:54372 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928AbaGQGuL convert rfc822-to-8bit (ORCPT ); Thu, 17 Jul 2014 02:50:11 -0400 Message-ID: <53c77222.0168440a.6be4.4860@mx.google.com> X-Google-Original-Message-ID: <000d01cfa18b$5962b180$0c281480$@dulixin@gmail.com> From: "Dudley Du" To: "Dmitry Torokhov" , "Rafael J. Wysocki" Cc: "Benson Leung" , "Patrik Fimml" , , , "Dudley Du" Subject: [PATCH v4 3/14] input: cyapa: add cyapa driver runtime power management interfaces support Date: Thu, 17 Jul 2014 14:49:56 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac+hi1Iew21miMXnQZu+ZUaGYaM8eQ== Content-Language: zh-cn Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add runtime_suspend_scanrate_ms power management interfaces in device's power group, so users or applications can control the runtime power management strategy of trackpad device as their requirements. TEST=test on Chromebooks. Signed-off-by: Dudley Du --- drivers/input/mouse/cyapa.c | 142 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 2e0ead5..6a2783b 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -268,9 +268,16 @@ static int cyapa_check_is_operational(struct cyapa *cyapa) static irqreturn_t cyapa_irq(int irq, void *dev_id) { struct cyapa *cyapa = dev_id; + struct device *dev = &cyapa->client->dev; struct input_dev *input = cyapa->input; bool cont; + pm_runtime_get_sync(dev); + pm_runtime_mark_last_busy(dev); + + if (device_may_wakeup(dev)) + pm_wakeup_event(dev, 0); + /* Interrupt event maybe cuased by host command to trackpad device. */ cont = true; if (cyapa->ops->irq_cmd_handler) @@ -294,6 +301,8 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id) mutex_unlock(&cyapa->state_sync_lock); } + + pm_runtime_put_sync_autosuspend(dev); out: return IRQ_HANDLED; } @@ -494,6 +503,87 @@ static const struct attribute_group cyapa_power_wakeup_group = { }; #endif /* CONFIG_PM_SLEEP */ +#ifdef CONFIG_PM_RUNTIME +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; + + mutex_lock(&cyapa->state_sync_lock); + pwr_cmd = cyapa->runtime_suspend_power_mode; + sleep_time = cyapa->runtime_suspend_sleep_time; + mutex_unlock(&cyapa->state_sync_lock); + + if (cyapa->gen == CYAPA_GEN3) + return scnprintf(buf, PAGE_SIZE, "%u\n", + cyapa_pwr_cmd_to_sleep_time(pwr_cmd)); + else + return scnprintf(buf, PAGE_SIZE, "%u\n", 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; + + 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); + mutex_lock(&cyapa->state_sync_lock); + cyapa->runtime_suspend_sleep_time = cyapa_clamp_sleep_time(time); + 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_start_runtime(struct cyapa *cyapa) +{ + struct device *dev = &cyapa->client->dev; + + cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE; + cyapa->runtime_suspend_sleep_time = + cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode); + if (sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group)) + dev_warn(dev, "error creating wakeup runtime entries.\n"); + pm_runtime_set_active(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY); + pm_runtime_enable(dev); +} +#else +static void cyapa_start_runtime(struct cyapa *cyapa) {} +#endif /* CONFIG_PM_RUNTIME */ + void cyapa_detect_async(void *data, async_cookie_t cookie) { struct cyapa *cyapa = (struct cyapa *)data; @@ -508,7 +598,11 @@ void cyapa_detect_async(void *data, async_cookie_t cookie) static void cyapa_detect_and_start(void *data, async_cookie_t cookie) { + struct cyapa *cyapa = data; + cyapa_detect_async(data, cookie); + + cyapa_start_runtime(cyapa); } static int cyapa_tp_modules_init(struct cyapa *cyapa) @@ -609,9 +703,15 @@ static int cyapa_remove(struct i2c_client *client) { struct cyapa *cyapa = i2c_get_clientdata(client); + pm_runtime_disable(&client->dev); + #ifdef CONFIG_PM_SLEEP sysfs_unmerge_group(&client->dev.kobj, &cyapa_power_wakeup_group); #endif + +#ifdef CONFIG_PM_RUNTIME + sysfs_unmerge_group(&client->dev.kobj, &cyapa_power_runtime_group); +#endif free_irq(cyapa->irq, cyapa); input_unregister_device(cyapa->input); @@ -678,12 +778,54 @@ static int cyapa_resume(struct device *dev) async_schedule(cyapa_detect_async, cyapa); + /* Update runtime power management to reflect active state. */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); return 0; } #endif /* CONFIG_PM_SLEEP */ +#ifdef CONFIG_PM_RUNTIME +static int cyapa_runtime_suspend(struct device *dev) +{ + int ret; + struct cyapa *cyapa = dev_get_drvdata(dev); + + if (cyapa->ops->set_power_mode) { + /* Set trackpad device to idle mode. */ + ret = cyapa->ops->set_power_mode(cyapa, + cyapa->runtime_suspend_power_mode, + cyapa->runtime_suspend_sleep_time); + if (ret) + dev_err(dev, "runtime suspend failed, %d\n", ret); + return ret; + } + + return 0; +} + +static int cyapa_runtime_resume(struct device *dev) +{ + int ret; + struct cyapa *cyapa = dev_get_drvdata(dev); + + if (cyapa->ops->set_power_mode) { + /* Resume to full active mode. */ + ret = cyapa->ops->set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + if (ret) + dev_err(dev, "runtime resume failed, %d\n", ret); + return ret; + } + + return 0; +} +#endif /* CONFIG_PM_RUNTIME */ + 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[] = { -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/