From patchwork Thu Sep 13 13:55:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: rajagopal.venkat@linaro.org X-Patchwork-Id: 11389 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id F31C623F22 for ; Thu, 13 Sep 2012 13:58:36 +0000 (UTC) Received: from mail-ie0-f180.google.com (mail-ie0-f180.google.com [209.85.223.180]) by fiordland.canonical.com (Postfix) with ESMTP id 9FA0EA258D8 for ; Thu, 13 Sep 2012 13:58:36 +0000 (UTC) Received: by mail-ie0-f180.google.com with SMTP id k11so4803808iea.11 for ; Thu, 13 Sep 2012 06:58:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=/P1iqRAjokVuMl92TN6BzLql9rH/QYsceGCmdJklGKw=; b=dcmKlnrIeKZUVGOstsxZiAvIUsu+IXhr1r8d4HaC31ouF7DcEfnC9bijq/lsn0wT+r MoJntxMQVN+7BSO4RtMqTSKyrMEDM3Mxf5j2TbXcnF+Wc8/KTrvziRSsMhnDfeoI8suQ M2+UScq1hPE8qU19QtdPmG6IpXXUYk6jiOXBnsua+UOAfbb0UM/2XWqm7haIcSVYBgHT gt6H2iMXLKLJWkyJaXg9DIGV6qydbndxMuCxqOCFTAhESkCAxdNaWeCPoYoszn3xj5z7 ELnMmfkYCj0chwJRAg2Cti1Ypw/RVfepENgLwFwoEtnDEt2I1aYwDW4Pd4VpTPNOsLp6 GecQ== Received: by 10.50.7.212 with SMTP id l20mr2625640iga.43.1347544716425; Thu, 13 Sep 2012 06:58:36 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.50.184.232 with SMTP id ex8csp133251igc; Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received: by 10.66.83.234 with SMTP id t10mr3495764pay.39.1347544715680; Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received: from mail-pb0-f50.google.com (mail-pb0-f50.google.com [209.85.160.50]) by mx.google.com with ESMTPS id qs7si34347284pbc.132.2012.09.13.06.58.35 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of rajagopal.venkat@linaro.org) client-ip=209.85.160.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of rajagopal.venkat@linaro.org) smtp.mail=rajagopal.venkat@linaro.org Received: by mail-pb0-f50.google.com with SMTP id md12so4571244pbc.37 for ; Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received: by 10.68.197.194 with SMTP id iw2mr4793701pbc.121.1347544715427; Thu, 13 Sep 2012 06:58:35 -0700 (PDT) Received: from localhost.localdomain ([115.242.164.208]) by mx.google.com with ESMTPS id gh7sm13126777pbc.29.2012.09.13.06.58.30 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 13 Sep 2012 06:58:34 -0700 (PDT) From: Rajagopal Venkat To: mturquette@linaro.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, rjw@sisk.pl Cc: patches@linaro.org, linaro-dev@lists.linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Rajagopal Venkat Subject: [PATCH v2 2/3] devfreq: Add suspend and resume apis Date: Thu, 13 Sep 2012 19:25:34 +0530 Message-Id: <1347544535-2772-3-git-send-email-rajagopal.venkat@linaro.org> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1347544535-2772-1-git-send-email-rajagopal.venkat@linaro.org> References: <1347544535-2772-1-git-send-email-rajagopal.venkat@linaro.org> X-Gm-Message-State: ALoCoQkMGx1vip0EcQ97/aXbPG6ECw+/ZVbfhNN5xAStAL1bAxc9OTCXpHdn4mti3isi6HHs0Pvd From: Rajagopal Venkat Add devfreq suspend/resume apis for devfreq users. This patch supports suspend and resume of devfreq load monitoring, required for devices which can idle. Signed-off-by: Rajagopal Venkat --- drivers/devfreq/devfreq.c | 26 ++++++++++++++++++++++++++ drivers/devfreq/governor.h | 2 ++ drivers/devfreq/governor_simpleondemand.c | 9 +++++++++ include/linux/devfreq.h | 12 ++++++++++++ 4 files changed, 49 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 9bf2b6a..309c46e 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -366,6 +366,32 @@ int devfreq_remove_device(struct devfreq *devfreq) } EXPORT_SYMBOL(devfreq_remove_device); +/** + * devfreq_suspend_device() - Suspend devfreq of a device. + * @devfreq the devfreq instance to be suspended + */ +int devfreq_suspend_device(struct devfreq *devfreq) +{ + if (!devfreq) + return -EINVAL; + + return devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_SUSPEND); +} +EXPORT_SYMBOL(devfreq_suspend_device); + +/** + * devfreq_resume_device() - Resume devfreq of a device. + * @devfreq the devfreq instance to be resumed + */ +int devfreq_resume_device(struct devfreq *devfreq) +{ + if (!devfreq) + return -EINVAL; + + return devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_RESUME); +} +EXPORT_SYMBOL(devfreq_resume_device); + static ssize_t show_governor(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index fb621f8..4624607 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -22,6 +22,8 @@ #define DEVFREQ_GOV_START 0x1 #define DEVFREQ_GOV_STOP 0x2 #define DEVFREQ_GOV_INTERVAL 0x3 +#define DEVFREQ_GOV_SUSPEND 0x4 +#define DEVFREQ_GOV_RESUME 0x5 /* Caution: devfreq->lock must be locked before calling update_devfreq */ extern int update_devfreq(struct devfreq *devfreq); diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index 7aed0ef..68ad7d7 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -111,6 +111,15 @@ int devfreq_simple_ondemand_handler(struct devfreq *devfreq, else devfreq_monitor_resume(devfreq); break; + + case DEVFREQ_GOV_SUSPEND: + devfreq_monitor_suspend(devfreq); + break; + + case DEVFREQ_GOV_RESUME: + devfreq_monitor_resume(devfreq); + break; + default: break; } diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 7a11c3e..7c7e179 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -155,6 +155,8 @@ extern struct devfreq *devfreq_add_device(struct device *dev, const struct devfreq_governor *governor, void *data); extern int devfreq_remove_device(struct devfreq *devfreq); +extern int devfreq_suspend_device(struct devfreq *devfreq); +extern int devfreq_resume_device(struct devfreq *devfreq); /* Helper functions for devfreq user device driver with OPP. */ extern struct opp *devfreq_recommended_opp(struct device *dev, @@ -208,6 +210,16 @@ static int devfreq_remove_device(struct devfreq *devfreq) return 0; } +static int devfreq_suspend_device(struct devfreq *devfreq) +{ + return 0; +} + +static int devfreq_resume_device(struct devfreq *devfreq) +{ + return 0; +} + static struct opp *devfreq_recommended_opp(struct device *dev, unsigned long *freq, u32 flags) {