From patchwork Wed Sep 8 00:54:42 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Hilman X-Patchwork-Id: 162521 X-Patchwork-Delegate: khilman@deeprootsystems.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 o880ssWc012237 for ; Wed, 8 Sep 2010 00:54:54 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757040Ab0IHAyx (ORCPT ); Tue, 7 Sep 2010 20:54:53 -0400 Received: from mail-yx0-f174.google.com ([209.85.213.174]:39402 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755480Ab0IHAyt (ORCPT ); Tue, 7 Sep 2010 20:54:49 -0400 Received: by yxp4 with SMTP id 4so2087375yxp.19 for ; Tue, 07 Sep 2010 17:54:48 -0700 (PDT) Received: by 10.150.97.10 with SMTP id u10mr274973ybb.324.1283907288115; Tue, 07 Sep 2010 17:54:48 -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 q21sm8024374ybk.23.2010.09.07.17.54.46 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 07 Sep 2010 17:54:46 -0700 (PDT) From: Kevin Hilman To: linux-omap@vger.kernel.org Cc: Grant Likely , linux-arm-kernel@lists.infradead.org, Manjunatha GK Subject: [PATCH 2/2] OMAP1: PM: add simple runtime PM layer to manage clocks Date: Tue, 7 Sep 2010 17:54:42 -0700 Message-Id: <1283907282-986-2-git-send-email-khilman@deeprootsystems.com> X-Mailer: git-send-email 1.7.2.1 In-Reply-To: <1283907282-986-1-git-send-email-khilman@deeprootsystems.com> References: <1283907282-986-1-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 (demeter1.kernel.org [140.211.167.41]); Wed, 08 Sep 2010 00:54:54 +0000 (UTC) diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile index facfaeb..9a304d8 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..c831348 --- /dev/null +++ b/arch/arm/mach-omap1/pm_bus.c @@ -0,0 +1,98 @@ +/* + * 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 + +#include +#include + +#ifdef CONFIG_PM_RUNTIME +static int omap1_pm_runtime_suspend(struct device *dev) +{ + struct clk *iclk, *fclk; + int ret = 0; + + dev_dbg(dev, "%s\n", __func__); + + ret = pm_generic_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; +}; + +static int omap1_pm_runtime_resume(struct device *dev) +{ + int ret = 0; + struct clk *iclk, *fclk; + + dev_dbg(dev, "%s\n", __func__); + + iclk = clk_get(dev, "ick"); + 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); + } + + return pm_generic_runtime_resume(dev); +}; + +static int __init omap1_pm_runtime_init(void) +{ + const struct dev_pm_ops *pm; + struct dev_pm_ops *omap_pm; + + pm = platform_bus_get_pm_ops(); + if (!pm) { + pr_err("%s: unable to get dev_pm_ops from platform_bus\n", + __func__); + return -ENODEV; + } + + omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL); + if (!omap_pm) { + pr_err("%s: unable to alloc memory for new dev_pm_ops\n", + __func__); + return -ENOMEM; + } + + omap_pm->runtime_suspend = omap1_pm_runtime_suspend; + omap_pm->runtime_resume = omap1_pm_runtime_resume; + + platform_bus_set_pm_ops(omap_pm); + + return 0; +} +core_initcall(omap1_pm_runtime_init); +#endif /* CONFIG_PM_RUNTIME */