From patchwork Sun Jul 29 14:16:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 1252411 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 65D4ADF25A for ; Sun, 29 Jul 2012 14:13:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753209Ab2G2OMK (ORCPT ); Sun, 29 Jul 2012 10:12:10 -0400 Received: from ogre.sisk.pl ([193.178.161.156]:33596 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753165Ab2G2OMF (ORCPT ); Sun, 29 Jul 2012 10:12:05 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id 33FB01DB076; Sun, 29 Jul 2012 16:04:52 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 19006-09; Sun, 29 Jul 2012 16:04:31 +0200 (CEST) Received: from ferrari.rjw.lan (62-121-64-87.home.aster.pl [62.121.64.87]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 0BB0E1DB416; Sun, 29 Jul 2012 16:04:31 +0200 (CEST) From: "Rafael J. Wysocki" To: LKML Subject: [RFC][PATCH 4/6] sh: TMU: Introduce clocksource/clock events suspend/resume routines Date: Sun, 29 Jul 2012 16:16:00 +0200 User-Agent: KMail/1.13.6 (Linux/3.5.0+; KDE/4.6.0; x86_64; ; ) Cc: "Linux-sh list" , Linux PM list , Magnus Damm , Paul Mundt , Thomas Gleixner References: <201207291612.43138.rjw@sisk.pl> In-Reply-To: <201207291612.43138.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201207291616.00569.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Introduce suspend/resume routines for SH TMU clock source and clock event device such that if those devices belong to a PM domain, the generic PM domains framework will be notified that the given domain may be turned off (during system suspend) or that it has to be turned on (during system resume). This change allows the A4R domain on SH7372 to be turned off during system suspend (tested on the Mackerel board). Signed-off-by: Rafael J. Wysocki --- drivers/clocksource/sh_tmu.c | 39 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 37 insertions(+), 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux/drivers/clocksource/sh_tmu.c =================================================================== --- linux.orig/drivers/clocksource/sh_tmu.c +++ linux/drivers/clocksource/sh_tmu.c @@ -33,6 +33,7 @@ #include #include #include +#include struct sh_tmu_priv { void __iomem *mapbase; @@ -214,6 +215,22 @@ static void sh_tmu_clocksource_disable(s sh_tmu_disable(cs_to_sh_tmu(cs)); } +static void sh_tmu_clocksource_suspend(struct clocksource *cs) +{ + struct sh_tmu_priv *p = cs_to_sh_tmu(cs); + + sh_tmu_disable(p); + pm_genpd_syscore_poweroff(&p->pdev->dev); +} + +static void sh_tmu_clocksource_resume(struct clocksource *cs) +{ + struct sh_tmu_priv *p = cs_to_sh_tmu(cs); + + pm_genpd_syscore_poweron(&p->pdev->dev); + sh_tmu_enable(p); +} + static int sh_tmu_register_clocksource(struct sh_tmu_priv *p, char *name, unsigned long rating) { @@ -224,6 +241,8 @@ static int sh_tmu_register_clocksource(s cs->read = sh_tmu_clocksource_read; cs->enable = sh_tmu_clocksource_enable; cs->disable = sh_tmu_clocksource_disable; + cs->suspend = sh_tmu_clocksource_suspend; + cs->resume = sh_tmu_clocksource_resume; cs->mask = CLOCKSOURCE_MASK(32); cs->flags = CLOCK_SOURCE_IS_CONTINUOUS; @@ -301,6 +320,16 @@ static int sh_tmu_clock_event_next(unsig return 0; } +static void sh_tmu_clock_event_suspend(struct clock_event_device *ced) +{ + pm_genpd_syscore_poweroff(&ced_to_sh_tmu(ced)->pdev->dev); +} + +static void sh_tmu_clock_event_resume(struct clock_event_device *ced) +{ + pm_genpd_syscore_poweron(&ced_to_sh_tmu(ced)->pdev->dev); +} + static void sh_tmu_register_clockevent(struct sh_tmu_priv *p, char *name, unsigned long rating) { @@ -316,6 +345,8 @@ static void sh_tmu_register_clockevent(s ced->cpumask = cpumask_of(0); ced->set_next_event = sh_tmu_clock_event_next; ced->set_mode = sh_tmu_clock_event_mode; + ced->suspend = sh_tmu_clock_event_suspend; + ced->resume = sh_tmu_clock_event_resume; dev_info(&p->pdev->dev, "used for clock events\n"); @@ -407,8 +438,12 @@ static int __devinit sh_tmu_probe(struct struct sh_tmu_priv *p = platform_get_drvdata(pdev); int ret; - if (!is_early_platform_device(pdev)) - pm_genpd_dev_always_on(&pdev->dev, true); + if (!is_early_platform_device(pdev)) { + struct sh_timer_config *cfg = pdev->dev.platform_data; + + if (cfg->clocksource_rating || cfg->clockevent_rating) + pm_genpd_dev_always_on(&pdev->dev, true); + } if (p) { dev_info(&pdev->dev, "kept as earlytimer\n");