From patchwork Mon Jan 31 10:33:44 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ohad Ben Cohen X-Patchwork-Id: 518971 X-Patchwork-Delegate: tony@atomide.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 p0VAZH8I016582 for ; Mon, 31 Jan 2011 10:35:20 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755476Ab1AaKeU (ORCPT ); Mon, 31 Jan 2011 05:34:20 -0500 Received: from mail-bw0-f46.google.com ([209.85.214.46]:44200 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755448Ab1AaKeS (ORCPT ); Mon, 31 Jan 2011 05:34:18 -0500 Received: by mail-bw0-f46.google.com with SMTP id 15so5095340bwz.19 for ; Mon, 31 Jan 2011 02:34:17 -0800 (PST) Received: by 10.204.98.15 with SMTP id o15mr5180876bkn.14.1296470054593; Mon, 31 Jan 2011 02:34:14 -0800 (PST) Received: from localhost.localdomain (93-173-165-51.bb.netvision.net.il [93.173.165.51]) by mx.google.com with ESMTPS id b6sm10144056bkb.22.2011.01.31.02.34.10 (version=TLSv1/SSLv3 cipher=RC4-MD5); Mon, 31 Jan 2011 02:34:12 -0800 (PST) From: Ohad Ben-Cohen To: , , , Cc: Greg KH , Tony Lindgren , Benoit Cousson , Grant Likely , Suman Anna , Kevin Hilman , Arnd Bergmann , Paul Walmsley , Hari Kanigeri , Simon Que Subject: [PATCH v4 4/4] omap: add hwspinlock device Date: Mon, 31 Jan 2011 12:33:44 +0200 Message-Id: <1296470024-26854-5-git-send-email-ohad@wizery.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1296470024-26854-1-git-send-email-ohad@wizery.com> References: <1296470024-26854-1-git-send-email-ohad@wizery.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]); Mon, 31 Jan 2011 10:35:20 +0000 (UTC) diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 1c0c2b0..7b9abe1 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -242,3 +242,4 @@ obj-y += $(smc91x-m) $(smc91x-y) smsc911x-$(CONFIG_SMSC911X) := gpmc-smsc911x.o obj-y += $(smsc911x-m) $(smsc911x-y) +obj-$(CONFIG_ARCH_OMAP4) += hwspinlock.o diff --git a/arch/arm/mach-omap2/hwspinlock.c b/arch/arm/mach-omap2/hwspinlock.c new file mode 100644 index 0000000..06d4a80 --- /dev/null +++ b/arch/arm/mach-omap2/hwspinlock.c @@ -0,0 +1,63 @@ +/* + * OMAP hardware spinlock device initialization + * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com + * + * Contact: Simon Que + * Hari Kanigeri + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include +#include + +#include +#include + +struct omap_device_pm_latency omap_spinlock_latency[] = { + { + .deactivate_func = omap_device_idle_hwmods, + .activate_func = omap_device_enable_hwmods, + .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, + } +}; + +int __init hwspinlocks_init(void) +{ + int retval = 0; + struct omap_hwmod *oh; + struct omap_device *od; + const char *oh_name = "spinlock"; + const char *dev_name = "omap_hwspinlock"; + + /* + * Hwmod lookup will fail in case our platform doesn't support the + * hardware spinlock module, so it is safe to run this initcall + * on all omaps + */ + oh = omap_hwmod_lookup(oh_name); + if (oh == NULL) + return -EINVAL; + + od = omap_device_build(dev_name, 0, oh, NULL, 0, + omap_spinlock_latency, + ARRAY_SIZE(omap_spinlock_latency), false); + if (IS_ERR(od)) { + pr_err("Can't build omap_device for %s:%s\n", dev_name, + oh_name); + retval = PTR_ERR(od); + } + + return retval; +} +/* early board code might need to reserve specific hwspinlock instances */ +postcore_initcall(hwspinlocks_init);