From patchwork Wed Dec 3 09:30:12 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5428361 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B408ABEEA8 for ; Wed, 3 Dec 2014 09:32:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A1026201CE for ; Wed, 3 Dec 2014 09:32:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7732520353 for ; Wed, 3 Dec 2014 09:32:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752270AbaLCJcU (ORCPT ); Wed, 3 Dec 2014 04:32:20 -0500 Received: from mail-pa0-f41.google.com ([209.85.220.41]:44607 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752255AbaLCJcS (ORCPT ); Wed, 3 Dec 2014 04:32:18 -0500 Received: by mail-pa0-f41.google.com with SMTP id rd3so15388306pab.14 for ; Wed, 03 Dec 2014 01:32:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=T7lBdbZf3663L5fHHJXFQ6iWLDCW/TA1LlFSqAesL0M=; b=lsBSA8kDAxFYv6Z7sbgAEJ6+y42431qspk2Bu3rfjgcOHzVT5NPeSFLJeeIgFh/w6P reDqLxtJuItqF94CYgUKhHsZBMhAydfNbyW7mdtnyrTi4x8PNSsqAKAsY0o2Y6KhlBH7 IJHD2wwFz0clTZW3BEgMQZXbf3NeSZcI8eSoWSdq+C8vyCdZT6XlpjgdQLwSLXd3eLN8 pezgaToyhWpLIkicxcQrF7KqylTruz+AIcgQWLTZlOqit3DIGIgnB3gaYUQU/fSlHIfQ 06wQCae/WFaysJAfJZUHKrEus3gywxX7uJwQoMYCapt3H56d85aw9jB6HcLPrlV3Sk0r ga+A== X-Received: by 10.66.228.131 with SMTP id si3mr7178649pac.32.1417599138001; Wed, 03 Dec 2014 01:32:18 -0800 (PST) Received: from localhost ([140.207.206.26]) by mx.google.com with ESMTPSA id y7sm22621936pdm.12.2014.12.03.01.32.14 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 03 Dec 2014 01:32:16 -0800 (PST) From: Dudley Du To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v12 06/19] input: cyapa: add runtime power management interfaces supported for the device Date: Wed, 3 Dec 2014 17:30:12 +0800 Message-Id: <1417599025-21681-7-git-send-email-dudley.dulixin@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1417599025-21681-1-git-send-email-dudley.dulixin@gmail.com> References: <1417599025-21681-1-git-send-email-dudley.dulixin@gmail.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 | 167 ++++++++++++++++++++++++++++++++++++++++++++ drivers/input/mouse/cyapa.h | 4 ++ 2 files changed, 171 insertions(+) diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index a31c555..59e197c 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "cyapa.h" @@ -334,6 +335,8 @@ static int cyapa_open(struct input_dev *input) } enable_irq(client->irq); + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); out: mutex_unlock(&cyapa->state_sync_lock); return error; @@ -347,8 +350,10 @@ static void cyapa_close(struct input_dev *input) mutex_lock(&cyapa->state_sync_lock); disable_irq(client->irq); + pm_runtime_disable(&client->dev); if (!CYAPA_BOOTLOADER(cyapa) && cyapa->ops->set_power_mode) cyapa->ops->set_power_mode(cyapa, PWR_MODE_OFF, 0); + pm_runtime_set_suspended(&client->dev); mutex_unlock(&cyapa->state_sync_lock); } @@ -549,6 +554,7 @@ static irqreturn_t cyapa_irq(int irq, void *dev_id) struct device *dev = &cyapa->client->dev; bool cont; + pm_runtime_get_sync(dev); if (device_may_wakeup(dev)) pm_wakeup_event(dev, 0); @@ -579,6 +585,8 @@ 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; } @@ -672,6 +680,116 @@ static void cyapa_remove_power_wakeup_group(void *data) } #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; + 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); + + if (cyapa->gen == CYAPA_GEN3) + return scnprintf(buf, PAGE_SIZE, "%u\n", + cyapa_pwr_cmd_to_sleep_time(pwr_cmd)); + 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; + 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; +} +#endif /* CONFIG_PM_RUNTIME */ + static int cyapa_probe(struct i2c_client *client, const struct i2c_device_id *dev_id) { @@ -732,6 +850,14 @@ static int cyapa_probe(struct i2c_client *client, } #endif /* CONFIG_PM_SLEEP */ +#ifdef CONFIG_PM_RUNTIME + error = cyapa_start_runtime(cyapa); + if (error) { + dev_err(dev, "failed to start pm_runtime: %d\n", error); + return error; + } +#endif /* CONFIG_PM_RUNTIME */ + error = devm_request_threaded_irq(dev, client->irq, NULL, @@ -775,6 +901,7 @@ static int __maybe_unused cyapa_suspend(struct device *dev) if (error) return error; + pm_runtime_disable(dev); disable_irq(cyapa->client->irq); /* @@ -791,6 +918,8 @@ static int __maybe_unused cyapa_suspend(struct device *dev) error); } + pm_runtime_set_suspended(dev); + if (device_may_wakeup(dev)) cyapa->irq_wake = (enable_irq_wake(cyapa->client->irq) == 0); @@ -811,18 +940,56 @@ static int __maybe_unused cyapa_resume(struct device *dev) cyapa->irq_wake = false; } + pm_runtime_set_active(dev); + error = cyapa_reinitialize(cyapa); if (error) dev_err(dev, "failed to reinitialize TP device: %d\n", error); enable_irq(cyapa->client->irq); + pm_runtime_enable(dev); + mutex_unlock(&cyapa->state_sync_lock); return 0; } +#ifdef CONFIG_PM_RUNTIME +static int cyapa_runtime_suspend(struct device *dev) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int error; + + if (!CYAPA_BOOTLOADER(cyapa) && cyapa->ops->set_power_mode) { + error = cyapa->ops->set_power_mode(cyapa, + cyapa->runtime_suspend_power_mode, + cyapa->runtime_suspend_sleep_time); + if (error) + dev_err(dev, "runtime suspend failed: %d\n", error); + } + + return 0; +} + +static int cyapa_runtime_resume(struct device *dev) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int error; + + if (!CYAPA_BOOTLOADER(cyapa) && cyapa->ops->set_power_mode) { + error = cyapa->ops->set_power_mode(cyapa, + PWR_MODE_FULL_ACTIVE, 0); + if (error) + dev_err(dev, "runtime resume failed: %d\n", error); + } + + 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[] = { diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h index 4a73081..eafeb79 100644 --- a/drivers/input/mouse/cyapa.h +++ b/drivers/input/mouse/cyapa.h @@ -262,6 +262,10 @@ struct cyapa { /* power mode settings */ u8 suspend_power_mode; u16 suspend_sleep_time; +#ifdef CONFIG_PM_RUNTIME + u8 runtime_suspend_power_mode; + u16 runtime_suspend_sleep_time; +#endif /* CONFIG_PM_RUNTIME */ u8 dev_pwr_mode; u16 dev_sleep_time;