From patchwork Thu Oct 4 09:28:33 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: 11978 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 3CCBF2414D for ; Thu, 4 Oct 2012 09:32:32 +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 F386AA1871B for ; Thu, 4 Oct 2012 09:32:31 +0000 (UTC) Received: by mail-ie0-f180.google.com with SMTP id e10so497363iej.11 for ; Thu, 04 Oct 2012 02:32:31 -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=qI7oWIDsmOpw24O2Q/bZUAL1agPpgUdf5Fc+Lyp5w5U=; b=n9HJPJ8cUffBq5Mi36fG/f2cm2vskPh0CxvY+Pgm3jR1SdLsvBdDYncAjVuuTrRaCf XnFYzmbZeCyhyonB44hQe/7jsWSR6w2Gw8jyuAcwYgrmj1dGbjFb/jzY7OFLcmeRKaWN DZd3Utkgj28dWQeWoMM5+2GXau30lzV3CSoD6yajyompe1d4L0lFQ5n1QHlBZ835+qkS Yp5MOQsCnHoROf4hFfT/HuweSMu2902MCqcuRXi2HmzaNLpoICFc6zg7q0qFJIh/4vvQ ZibuGyu2FoXjNEpNVDoz674KgLcTXqWhydsySmh9xBdXKST8L2pGfvYeBiSAKbQKmEif yFEw== Received: by 10.50.150.198 with SMTP id uk6mr4543453igb.43.1349343151693; Thu, 04 Oct 2012 02:32:31 -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 ex8csp56627igc; Thu, 4 Oct 2012 02:32:31 -0700 (PDT) Received: by 10.68.201.104 with SMTP id jz8mr20440272pbc.141.1349343150665; Thu, 04 Oct 2012 02:32:30 -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 pi9si13076816pbb.132.2012.10.04.02.32.30 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 04 Oct 2012 02:32:30 -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 md4so485813pbc.37 for ; Thu, 04 Oct 2012 02:32:30 -0700 (PDT) Received: by 10.68.194.165 with SMTP id hx5mr20668506pbc.40.1349343150419; Thu, 04 Oct 2012 02:32:30 -0700 (PDT) Received: from localhost.localdomain ([115.184.98.135]) by mx.google.com with ESMTPS id mn5sm4084933pbc.12.2012.10.04.02.32.25 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 04 Oct 2012 02:32:29 -0700 (PDT) From: Rajagopal Venkat To: myungjoo.ham@samsung.com, mturquette@linaro.org, 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 v4 2/3] devfreq: Add suspend and resume apis Date: Thu, 4 Oct 2012 14:58:33 +0530 Message-Id: <1349342914-7095-3-git-send-email-rajagopal.venkat@linaro.org> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1349342914-7095-1-git-send-email-rajagopal.venkat@linaro.org> References: <1349342914-7095-1-git-send-email-rajagopal.venkat@linaro.org> X-Gm-Message-State: ALoCoQmWLlfgq5IXgqI8509M2tz+ZF/mJkTfdMXa7aYaAd8JnU6OUcnYZKas+ALGKRx6HDoyp/bh 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 Acked-by: MyungJoo Ham --- drivers/devfreq/devfreq.c | 28 ++++++++++++++++++++++++++++ drivers/devfreq/governor.h | 2 ++ drivers/devfreq/governor_simpleondemand.c | 9 +++++++++ include/linux/devfreq.h | 12 ++++++++++++ 4 files changed, 51 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 41a4099..63e075e 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -428,6 +428,34 @@ 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, NULL); +} +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, NULL); +} +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 bb3aff3..26432ac 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 cf94218..a8ba78c 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -104,6 +104,15 @@ int devfreq_simple_ondemand_handler(struct devfreq *devfreq, case DEVFREQ_GOV_INTERVAL: devfreq_interval_update(devfreq, (unsigned int *)data); 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 9cdffde..ee243a3 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -158,6 +158,8 @@ 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, @@ -211,6 +213,16 @@ 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) {