From patchwork Thu Jun 17 23:08:07 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Hilman X-Patchwork-Id: 106758 X-Patchwork-Delegate: khilman@deeprootsystems.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o5HN8jKa002155 for ; Thu, 17 Jun 2010 23:08:45 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932943Ab0FQXIO (ORCPT ); Thu, 17 Jun 2010 19:08:14 -0400 Received: from mail-pw0-f46.google.com ([209.85.160.46]:53936 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932941Ab0FQXIL (ORCPT ); Thu, 17 Jun 2010 19:08:11 -0400 Received: by pwi1 with SMTP id 1so187373pwi.19 for ; Thu, 17 Jun 2010 16:08:10 -0700 (PDT) Received: by 10.115.66.9 with SMTP id t9mr179930wak.78.1276816089888; Thu, 17 Jun 2010 16:08:09 -0700 (PDT) Received: from localhost (c-24-18-179-55.hsd1.wa.comcast.net [24.18.179.55]) by mx.google.com with ESMTPS id c22sm34995476wam.18.2010.06.17.16.08.08 (version=TLSv1/SSLv3 cipher=RC4-MD5); Thu, 17 Jun 2010 16:08:09 -0700 (PDT) From: Kevin Hilman To: linux-omap@vger.kernel.org Subject: [PATCH] OMAP1: PM: add simple runtime PM layer to manage clocks Date: Thu, 17 Jun 2010 16:08:07 -0700 Message-Id: <1276816087-2924-1-git-send-email-khilman@deeprootsystems.com> X-Mailer: git-send-email 1.7.0.2 In-Reply-To: <1274994799-30297-1-git-send-email-khilman@deeprootsystems.com> References: <1274994799-30297-1-git-send-email-khilman@deeprootsystems.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-4.2.3 (demeter.kernel.org [140.211.167.41]); Thu, 17 Jun 2010 23:08:45 +0000 (UTC) diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile index ea231c7..fd4df71 100644 --- a/arch/arm/mach-omap1/Makefile +++ b/arch/arm/mach-omap1/Makefile @@ -12,7 +12,7 @@ obj-$(CONFIG_OMAP_MPU_TIMER) += time.o obj-$(CONFIG_OMAP_32K_TIMER) += timer32k.o # Power Management -obj-$(CONFIG_PM) += pm.o sleep.o +obj-$(CONFIG_PM) += pm.o sleep.o pm_bus.o # DSP obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o diff --git a/arch/arm/mach-omap1/pm_bus.c b/arch/arm/mach-omap1/pm_bus.c new file mode 100644 index 0000000..46a34fc --- /dev/null +++ b/arch/arm/mach-omap1/pm_bus.c @@ -0,0 +1,77 @@ +/* + * Runtime PM support code for OMAP1 + * + * Author: Kevin Hilman, Deep Root Systems, LLC + * + * Copyright (C) 2010 Texas Instruments, Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include +#include +#include +#include +#include +#include + +#include +#include + +#ifdef CONFIG_PM_RUNTIME +int platform_pm_runtime_suspend(struct device *dev) +{ + struct clk *iclk, *fclk; + + dev_dbg(dev, "%s\n", __func__); + + if (dev->driver->pm && dev->driver->pm->runtime_suspend) + ret = dev->driver->pm->runtime_suspend(dev); + + fclk = clk_get(dev, "fck"); + if (!IS_ERR(fclk)) { + clk_disable(fclk); + clk_put(fclk); + } + + iclk = clk_get(dev, "ick"); + if (!IS_ERR(iclk)) { + clk_disable(iclk); + clk_put(iclk); + } + + return 0; +}; + +int platform_pm_runtime_resume(struct device *dev) +{ + int r, ret = 0; + struct clk *iclk, *fclk; + + iclk = clk_get(dev, "fck"); + if (!IS_ERR(iclk)) { + clk_enable(iclk); + clk_put(iclk); + } + + fclk = clk_get(dev, "fck"); + if (!IS_ERR(fclk)) { + clk_enable(fclk); + clk_put(fclk); + } + + if (dev->driver->pm && dev->driver->pm->runtime_resume) + ret = dev->driver->pm->runtime_resume(dev); + + return ret; +}; + +int platform_pm_runtime_idle(struct device *dev) +{ + ret = pm_runtime_suspend(dev); + dev_dbg(dev, "%s [%d]\n", __func__, ret); + + return 0; +}; +#endif /* CONFIG_PM_RUNTIME */