From patchwork Fri Jan 16 06:34:06 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5645901 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 299299F358 for ; Fri, 16 Jan 2015 06:38:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4076A2012E for ; Fri, 16 Jan 2015 06:38:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B3C02011E for ; Fri, 16 Jan 2015 06:38:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754006AbbAPGiG (ORCPT ); Fri, 16 Jan 2015 01:38:06 -0500 Received: from smtp1.cypress.com ([157.95.67.100]:49103 "EHLO smtp1.cypress.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752273AbbAPGfJ (ORCPT ); Fri, 16 Jan 2015 01:35:09 -0500 Received: from corpmail1.cypress.com (corpmail1.mis.cypress.com [172.16.5.228]) by smtp1.cypress.com (8.13.8/8.13.8) with ESMTP id t0G6Z1JT005078; Thu, 15 Jan 2015 22:35:01 -0800 Received: from mailhost.mis.cypress.com (mailhost [172.16.2.5]) by corpmail1.cypress.com (8.14.4/8.14.4) with ESMTP id t0G6Z1B4025169; Thu, 15 Jan 2015 22:35:01 -0800 Received: from localhost ([172.23.6.162]) by mailhost.mis.cypress.com (8.12.11/8.12.11) with ESMTP id t0G6Z0D0002268; Thu, 15 Jan 2015 22:35:01 -0800 (PST) From: Dudley Du To: dmitry.torokhov@gmail.com, jmmahler@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v18 03/12] input: cyapa: add power management interfaces support for the device Date: Fri, 16 Jan 2015 14:34:06 +0800 Message-Id: <1421390055-32760-4-git-send-email-dudl@cypress.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1421390055-32760-1-git-send-email-dudl@cypress.com> References: <1421390055-32760-1-git-send-email-dudl@cypress.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=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 suspend_scanrate_ms power management interfaces in device's power group, so users or applications can control the power management strategy of trackpad device as their requirements. TEST=test on Chromebooks. Signed-off-by: Dudley Du --- drivers/input/mouse/cyapa.c | 127 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index fa4d501..eb0e515 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -604,6 +604,127 @@ out: return IRQ_HANDLED; } +/* + ************************************************************** + * sysfs interface + ************************************************************** +*/ +#ifdef CONFIG_PM_SLEEP +static ssize_t cyapa_show_suspend_scanrate(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + u8 pwr_cmd = cyapa->suspend_power_mode; + u16 sleep_time; + int len; + int error; + + error = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (error) + return error; + pwr_cmd = cyapa->suspend_power_mode; + sleep_time = cyapa->suspend_sleep_time; + mutex_unlock(&cyapa->state_sync_lock); + + if (pwr_cmd == PWR_MODE_BTN_ONLY) { + len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME); + } else if (pwr_cmd == PWR_MODE_OFF) { + len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME); + } else { + if (cyapa->gen == CYAPA_GEN3) + sleep_time = cyapa_pwr_cmd_to_sleep_time(pwr_cmd); + len = scnprintf(buf, PAGE_SIZE, "%u\n", sleep_time); + } + + return len; +} + +static ssize_t cyapa_update_suspend_scanrate(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + u16 sleep_time; + int error; + + error = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (error) + return error; + + if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) { + cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY; + } else if (sysfs_streq(buf, OFF_MODE_NAME)) { + cyapa->suspend_power_mode = PWR_MODE_OFF; + } else if (!kstrtou16(buf, 10, &sleep_time)) { + cyapa->suspend_sleep_time = max_t(u16, sleep_time, 1000); + cyapa->suspend_power_mode = + cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); + } else { + count = 0; + } + + mutex_unlock(&cyapa->state_sync_lock); + + return count ? count : -EINVAL; +} + +static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR, + cyapa_show_suspend_scanrate, + cyapa_update_suspend_scanrate); + +static struct attribute *cyapa_power_wakeup_entries[] = { + &dev_attr_suspend_scanrate_ms.attr, + NULL, +}; + +static const struct attribute_group cyapa_power_wakeup_group = { + .name = power_group_name, + .attrs = cyapa_power_wakeup_entries, +}; + +static void cyapa_remove_power_wakeup_group(void *data) +{ + struct cyapa *cyapa = data; + + sysfs_unmerge_group(&cyapa->client->dev.kobj, + &cyapa_power_wakeup_group); +} + +static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) +{ + struct i2c_client *client = cyapa->client; + struct device *dev = &client->dev; + int error; + + if (device_can_wakeup(dev)) { + error = sysfs_merge_group(&client->dev.kobj, + &cyapa_power_wakeup_group); + if (error) { + dev_err(dev, "failed to add power wakeup group: %d\n", + error); + return error; + } + + error = devm_add_action(dev, + cyapa_remove_power_wakeup_group, cyapa); + if (error) { + cyapa_remove_power_wakeup_group(cyapa); + dev_err(dev, "failed to add power cleanup action: %d\n", + error); + return error; + } + } + + return 0; +} +#else +static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa) +{ + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + static int cyapa_probe(struct i2c_client *client, const struct i2c_device_id *dev_id) { @@ -643,6 +764,12 @@ static int cyapa_probe(struct i2c_client *client, return error; } + error = cyapa_prepare_wakeup_controls(cyapa); + if (error) { + dev_err(dev, "failed to prepare wakeup controls: %d\n", error); + return error; + } + error = devm_request_threaded_irq(dev, client->irq, NULL, cyapa_irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT,