From patchwork Wed Oct 15 07:19:16 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5084391 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 [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 88FFD9F295 for ; Wed, 15 Oct 2014 07:24:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 98A592011B for ; Wed, 15 Oct 2014 07:24:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADD1320109 for ; Wed, 15 Oct 2014 07:24:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751477AbaJOHU2 (ORCPT ); Wed, 15 Oct 2014 03:20:28 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:57293 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751246AbaJOHUY (ORCPT ); Wed, 15 Oct 2014 03:20:24 -0400 Received: by mail-pa0-f43.google.com with SMTP id lf10so803456pab.16 for ; Wed, 15 Oct 2014 00:20:23 -0700 (PDT) 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=VrVsu6pk3cbjjtM7+Rz/v/EEkWVuDF+/GOtyts7QBNk=; b=NFSshtVHP1Aul2pKFai6JsAjNP3/tX5jDxvVszvvFJXM8QqQDw1ohGVYmCv4EWnL09 2p8w2aQlLiZKVrMqiS8d4uPv3eao3KK0UcBs1JIb7Qi9KYpjRltFmpgk3rTXFexUz3jf xkwW8j9eRuCJ21t1mpHrCJ8r+eDGGOtZtksoTWbCCIm2P/U4GNnouYhWIa5c4GJIelNj Rt3iu7kPprPe9Lqsp5oU7r05RCKhnbdORoebPIEtkLyiiekLoMV/oyzSrRE8zEyI7pmb Az+lcjJz4x7iQIpWUFWjtta58WWHl5YypD/n0mDRG7PM6tajkXZQ+GwHV73+PNZVOh5r IIgA== X-Received: by 10.68.136.195 with SMTP id qc3mr10790967pbb.40.1413357623654; Wed, 15 Oct 2014 00:20:23 -0700 (PDT) Received: from localhost ([140.207.206.26]) by mx.google.com with ESMTPSA id kk10sm16156029pdb.63.2014.10.15.00.20.20 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 15 Oct 2014 00:20:22 -0700 (PDT) From: Dudley Du X-Google-Original-From: Dudley Du To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, patrikf@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 02/13] input: cyapa: add cyapa driver power management interfaces support Date: Wed, 15 Oct 2014 15:19:16 +0800 Message-Id: <1413357567-26177-3-git-send-email-dudl@cypress.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1413357567-26177-1-git-send-email-dudl@cypress.com> References: <1413357567-26177-1-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=-6.8 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=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 | 112 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 4468e42..cf2fcc4 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -458,6 +458,96 @@ u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode) : (encoded_time - 5) * 20; } +#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 ret; + + ret = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (ret) + return ret; + 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 u16 cyapa_clamp_sleep_time(u16 sleep_time) +{ + if (sleep_time > 1000) + sleep_time = 1000; + return sleep_time; +} + +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 ret; + + ret = mutex_lock_interruptible(&cyapa->state_sync_lock); + if (ret) + return ret; + + 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 = cyapa_clamp_sleep_time(sleep_time); + cyapa->suspend_power_mode = + cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time); + } else + count = 0; + + mutex_unlock(&cyapa->state_sync_lock); + if (!count) + dev_err(dev, "invalid suspend scanrate ms parameters\n"); + 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); +} +#endif /* CONFIG_PM_SLEEP */ + void cyapa_sync_detect(void *data, async_cookie_t cookie) { cyapa_detect_with_lock((struct cyapa *)data); @@ -576,6 +666,28 @@ static int cyapa_probe(struct i2c_client *client, if (ret < 0) return ret; +#ifdef CONFIG_PM_SLEEP + if (device_can_wakeup(dev)) { + ret = sysfs_merge_group(&client->dev.kobj, + &cyapa_power_wakeup_group); + if (ret) { + dev_err(dev, "failed to add power wakeup group, (%d)\n", + ret); + return ret; + } + + ret = devm_add_action(dev, + cyapa_remove_power_wakeup_group, cyapa); + if (ret) { + cyapa_remove_power_wakeup_group(cyapa); + dev_err(dev, + "failed to add power cleanup action, (%d)\n", + ret); + return ret; + } + } +#endif /* CONFIG_PM_SLEEP */ + return 0; }