From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751524AbaJOHU3 (ORCPT ); Wed, 15 Oct 2014 03:20:29 -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 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-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 | 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; } -- 1.9.1