From patchwork Thu Feb 17 06:37:22 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kalliguddi, Hema" X-Patchwork-Id: 569361 X-Patchwork-Delegate: me@felipebalbi.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p1H6bjSl005861 for ; Thu, 17 Feb 2011 06:37:46 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755334Ab1BQGho (ORCPT ); Thu, 17 Feb 2011 01:37:44 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:36326 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755288Ab1BQGhl (ORCPT ); Thu, 17 Feb 2011 01:37:41 -0500 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id p1H6bZNw002258 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 17 Feb 2011 00:37:37 -0600 Received: from localhost.localdomain (localhost [127.0.0.1]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p1H6bN4g018214; Thu, 17 Feb 2011 12:07:33 +0530 (IST) From: Hema HK To: linux-usb@vger.kernel.org Cc: linux-omap@vger.kernel.org, Hema HK , Felipe Balbi , Tony Lindgren , Kevin Hilman , "Cousson, Benoit" , Paul Walmsley Subject: [PATCH 6/6 v8] usb: musb: Using runtime pm APIs for musb. Date: Thu, 17 Feb 2011 12:07:22 +0530 Message-Id: <1297924642-3791-7-git-send-email-hemahk@ti.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1297924642-3791-1-git-send-email-hemahk@ti.com> References: <1297924642-3791-1-git-send-email-hemahk@ti.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 17 Feb 2011 06:37:46 +0000 (UTC) Index: linux-2.6/drivers/usb/musb/musb_core.h =================================================================== --- linux-2.6.orig/drivers/usb/musb/musb_core.h +++ linux-2.6/drivers/usb/musb/musb_core.h @@ -360,7 +360,7 @@ struct musb_context_registers { #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \ defined(CONFIG_ARCH_OMAP4) - u32 otg_sysconfig, otg_forcestandby; + u32 otg_forcestandby; #endif u8 power; u16 intrtxe, intrrxe; Index: linux-2.6/drivers/usb/musb/omap2430.c =================================================================== --- linux-2.6.orig/drivers/usb/musb/omap2430.c +++ linux-2.6/drivers/usb/musb/omap2430.c @@ -33,6 +33,8 @@ #include #include #include +#include +#include #include "musb_core.h" #include "omap2430.h" @@ -40,7 +42,6 @@ struct omap2430_glue { struct device *dev; struct platform_device *musb; - struct clk *clk; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) @@ -216,20 +217,12 @@ static inline void omap2430_low_level_ex l = musb_readl(musb->mregs, OTG_FORCESTDBY); l |= ENABLEFORCE; /* enable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); - - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l |= ENABLEWAKEUP; /* enable wakeup */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); } static inline void omap2430_low_level_init(struct musb *musb) { u32 l; - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l &= ~ENABLEWAKEUP; /* disable wakeup */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); - l = musb_readl(musb->mregs, OTG_FORCESTDBY); l &= ~ENABLEFORCE; /* disable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); @@ -309,21 +302,6 @@ static int omap2430_musb_init(struct mus omap2430_low_level_init(musb); - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l &= ~ENABLEWAKEUP; /* disable wakeup */ - l &= ~NOSTDBY; /* remove possible nostdby */ - l |= SMARTSTDBY; /* enable smart standby */ - l &= ~AUTOIDLE; /* disable auto idle */ - l &= ~NOIDLE; /* remove possible noidle */ - l |= SMARTIDLE; /* enable smart idle */ - /* - * MUSB AUTOIDLE don't work in 3430. - * Workaround by Richard Woodruff/TI - */ - if (!cpu_is_omap3430()) - l |= AUTOIDLE; /* enable auto idle */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); - l = musb_readl(musb->mregs, OTG_INTERFSEL); if (data->interface_type == MUSB_INTERFACE_UTMI) { @@ -386,7 +364,7 @@ static int __init omap2430_probe(struct struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; struct platform_device *musb; struct omap2430_glue *glue; - struct clk *clk; + int status = 0; int ret = -ENOMEM; @@ -402,26 +380,12 @@ static int __init omap2430_probe(struct goto err1; } - clk = clk_get(&pdev->dev, "ick"); - if (IS_ERR(clk)) { - dev_err(&pdev->dev, "failed to get clock\n"); - ret = PTR_ERR(clk); - goto err2; - } - - ret = clk_enable(clk); - if (ret) { - dev_err(&pdev->dev, "failed to enable clock\n"); - goto err3; - } - musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &omap2430_dmamask; musb->dev.coherent_dma_mask = omap2430_dmamask; glue->dev = &pdev->dev; glue->musb = musb; - glue->clk = clk; pdata->platform_ops = &omap2430_ops; @@ -431,29 +395,32 @@ static int __init omap2430_probe(struct pdev->num_resources); if (ret) { dev_err(&pdev->dev, "failed to add resources\n"); - goto err4; + goto err2; } ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "failed to add platform_data\n"); - goto err4; + goto err2; } ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); - goto err4; + goto err2; } - return 0; + pm_runtime_enable(&pdev->dev); + status = pm_runtime_get_sync(&pdev->dev); + if (status < 0) { + dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); + goto err3; + } -err4: - clk_disable(clk); + return 0; err3: - clk_put(clk); - + pm_runtime_disable(&pdev->dev); err2: platform_device_put(musb); @@ -470,8 +437,8 @@ static int __exit omap2430_remove(struct platform_device_del(glue->musb); platform_device_put(glue->musb); - clk_disable(glue->clk); - clk_put(glue->clk); + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); kfree(glue); return 0; @@ -480,13 +447,11 @@ static int __exit omap2430_remove(struct #ifdef CONFIG_PM static void omap2430_save_context(struct musb *musb) { - musb->context.otg_sysconfig = musb_readl(musb->mregs, OTG_SYSCONFIG); musb->context.otg_forcestandby = musb_readl(musb->mregs, OTG_FORCESTDBY); } static void omap2430_restore_context(struct musb *musb) { - musb_writel(musb->mregs, OTG_SYSCONFIG, musb->context.otg_sysconfig); musb_writel(musb->mregs, OTG_FORCESTDBY, musb->context.otg_forcestandby); } @@ -498,7 +463,10 @@ static int omap2430_suspend(struct devic omap2430_low_level_exit(musb); otg_set_suspend(musb->xceiv, 1); omap2430_save_context(musb); - clk_disable(glue->clk); + + if (!pm_runtime_suspended(dev) && dev->bus && dev->bus->pm && + dev->bus->pm->runtime_suspend) + dev->bus->pm->runtime_suspend(dev); return 0; } @@ -507,13 +475,10 @@ static int omap2430_resume(struct device { struct omap2430_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); - int ret; - ret = clk_enable(glue->clk); - if (ret) { - dev_err(dev, "faled to enable clock\n"); - return ret; - } + if (!pm_runtime_suspended(dev) && dev->bus && dev->bus->pm && + dev->bus->pm->runtime_resume) + dev->bus->pm->runtime_resume(dev); omap2430_low_level_init(musb); omap2430_restore_context(musb);