From patchwork Mon Nov 3 08:32:57 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5214711 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 A85D29F349 for ; Mon, 3 Nov 2014 08:35:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C407A20173 for ; Mon, 3 Nov 2014 08:35:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C4FDD20166 for ; Mon, 3 Nov 2014 08:35:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751762AbaKCIf2 (ORCPT ); Mon, 3 Nov 2014 03:35:28 -0500 Received: from mail-pd0-f180.google.com ([209.85.192.180]:35839 "EHLO mail-pd0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751006AbaKCIf0 (ORCPT ); Mon, 3 Nov 2014 03:35:26 -0500 Received: by mail-pd0-f180.google.com with SMTP id ft15so11129136pdb.39 for ; Mon, 03 Nov 2014 00:35:25 -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=gr4NOR0Hgggt6pfJ9RUDbwyt9EJcKJM1HWd3uMn/Ank=; b=umUem+3rglN8uothxpj53jvKbBmkq7VGkxNv4Ma7EO0hHyIgF5VGpd+hr33N2lUVo4 lcQ5N+NKis8p/FpiVnEfcY1s5XBQ4X5AhzZO7iP0qVsWFmdTnHOAP3ILUHMnIjt/+FWB NXlQQ6Y1eFkobuJ13YQC8ccXaMH2QuNsZtKwV3n5pwtpSqWxRpADJGLTslEKQwYCHnj9 8MdjNJ6dkKGnrvmfDaae3QpXl2jnF3DmlCc0z+v2oCimf1yO5QlMDyk9iqE0tiXrLi5d tPNDwTWx/PI1qnMKjXHOrkUF6M+NP2O2SJ7mpGpRIovpU1Fij/qsR0z+GYUDflkrmpq2 sRHQ== X-Received: by 10.68.235.103 with SMTP id ul7mr41834304pbc.63.1415003725231; Mon, 03 Nov 2014 00:35:25 -0800 (PST) Received: from localhost ([140.207.206.26]) by mx.google.com with ESMTPSA id ml5sm16553403pab.32.2014.11.03.00.35.22 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 03 Nov 2014 00:35:24 -0800 (PST) From: Dudley Du X-Google-Original-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 v9 05/18] input: cyapa: add power management interfaces supported for the device Date: Mon, 3 Nov 2014 16:32:57 +0800 Message-Id: <1415003590-30485-6-git-send-email-dudl@cypress.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415003590-30485-1-git-send-email-dudl@cypress.com> References: <1415003590-30485-1-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=-7.4 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, 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 fac361a..420696d 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -505,6 +505,96 @@ 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 */ + /* * Returns: * 0 Driver and device initialization successfully done. @@ -588,6 +678,28 @@ static int cyapa_probe(struct i2c_client *client, 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; }