From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753494AbaH2Ihk (ORCPT ); Fri, 29 Aug 2014 04:37:40 -0400 Received: from mail-pa0-f50.google.com ([209.85.220.50]:56234 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753355AbaH2Ihg convert rfc822-to-8bit (ORCPT ); Fri, 29 Aug 2014 04:37:36 -0400 Message-ID: <54003bcf.ac26460a.73fc.ffffe98e@mx.google.com> X-Google-Original-Message-ID: <000c01cfc364$7ad79b50$7086d1f0$@dulixin@gmail.com> From: "Dudley Du" To: , Cc: , , , Subject: [PATCH V5 02/14] input: cyapa: add cyapa driver power management interfaces support Date: Fri, 29 Aug 2014 16:35:27 +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/DWGWWy6Yn2TqFRq2nIIe+lOyLNw== Content-Language: zh-cn Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 | 85 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c index 3edd23e..d61ccbc 100644 --- a/drivers/input/mouse/cyapa.c +++ b/drivers/input/mouse/cyapa.c @@ -427,6 +427,82 @@ 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; + + mutex_lock(&cyapa->state_sync_lock); + 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; + + mutex_lock(&cyapa->state_sync_lock); + + 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, +}; +#endif /* CONFIG_PM_SLEEP */ + void cyapa_detect_async(void *data, async_cookie_t cookie) { struct cyapa *cyapa = (struct cyapa *)data; @@ -521,6 +597,12 @@ static int cyapa_probe(struct i2c_client *client, goto err_uninit_tp_modules; } +#ifdef CONFIG_PM_SLEEP + if (device_can_wakeup(dev) && + sysfs_merge_group(&client->dev.kobj, &cyapa_power_wakeup_group)) + dev_warn(dev, "error creating wakeup power entries.\n"); +#endif /* CONFIG_PM_SLEEP */ + async_schedule(cyapa_detect_and_start, cyapa); return 0; @@ -543,6 +625,9 @@ static int cyapa_remove(struct i2c_client *client) cyapa->removed = true; mutex_unlock(&cyapa->state_sync_lock); +#ifdef CONFIG_PM_SLEEP + sysfs_unmerge_group(&client->dev.kobj, &cyapa_power_wakeup_group); +#endif free_irq(cyapa->irq, cyapa); input_unregister_device(cyapa->input); -- 1.9.1