From patchwork Sat Feb 19 10:42:23 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Santosh Shilimkar X-Patchwork-Id: 574571 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 p1JAguIe032649 for ; Sat, 19 Feb 2011 10:43:05 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754125Ab1BSKnE (ORCPT ); Sat, 19 Feb 2011 05:43:04 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:48718 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753997Ab1BSKm4 (ORCPT ); Sat, 19 Feb 2011 05:42:56 -0500 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id p1JAggGL025988 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 19 Feb 2011 04:42:44 -0600 Received: from linfarm476.india.ti.com (localhost [127.0.0.1]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p1JAgdLk013921; Sat, 19 Feb 2011 16:12:40 +0530 (IST) Received: from linfarm476.india.ti.com (localhost [127.0.0.1]) by linfarm476.india.ti.com (8.12.11/8.12.11) with ESMTP id p1JAgdM2028553; Sat, 19 Feb 2011 16:12:39 +0530 Received: (from a0393909@localhost) by linfarm476.india.ti.com (8.12.11/8.12.11/Submit) id p1JAgdQP028551; Sat, 19 Feb 2011 16:12:39 +0530 From: Santosh Shilimkar To: linux-omap@vger.kernel.org Cc: khilman@ti.com, linux-arm-kernel@lists.infradead.org, Santosh Shilimkar Subject: [PATCH 02/17] omap4: pm: Add SAR RAM support Date: Sat, 19 Feb 2011 16:12:23 +0530 Message-Id: <1298112158-28469-3-git-send-email-santosh.shilimkar@ti.com> X-Mailer: git-send-email 1.5.6.6 In-Reply-To: <1298112158-28469-1-git-send-email-santosh.shilimkar@ti.com> References: <1298112158-28469-1-git-send-email-santosh.shilimkar@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]); Sat, 19 Feb 2011 10:43:05 +0000 (UTC) diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c index 559d227..48484a5 100644 --- a/arch/arm/mach-omap2/omap4-common.c +++ b/arch/arm/mach-omap2/omap4-common.c @@ -23,12 +23,14 @@ #include #include +#include "omap4-sar-layout.h" + #ifdef CONFIG_CACHE_L2X0 void __iomem *l2cache_base; #endif void __iomem *gic_dist_base_addr; - +void __iomem *sar_ram_base; void __init gic_init_irq(void) { @@ -107,3 +109,24 @@ static int __init omap_l2_cache_init(void) } early_initcall(omap_l2_cache_init); #endif + +/* + * SAR RAM used to save and restore the HW + * context in low power modes + */ +static int __init omap4_sar_ram_init(void) +{ + /* + * To avoid code running on other OMAPs in + * multi-omap builds + */ + if (!cpu_is_omap44xx()) + return -ENODEV; + + /* Static mapping, never released */ + sar_ram_base = ioremap(OMAP44XX_SAR_RAM_BASE, SZ_8K); + BUG_ON(!sar_ram_base); + + return 0; +} +early_initcall(omap4_sar_ram_init); diff --git a/arch/arm/mach-omap2/omap4-sar-layout.h b/arch/arm/mach-omap2/omap4-sar-layout.h new file mode 100644 index 0000000..bb66816 --- /dev/null +++ b/arch/arm/mach-omap2/omap4-sar-layout.h @@ -0,0 +1,24 @@ +/* + * omap4-sar-layout.h: OMAP4 SAR RAM layout header file + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Santosh Shilimkar + * + * 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. + */ +#ifndef OMAP_ARCH_OMAP4_SAR_LAYOUT_H +#define OMAP_ARCH_OMAP4_SAR_LAYOUT_H + +/* + * SAR BANK offsets from base address OMAP44XX_SAR_RAM_BASE + */ +#define SAR_BANK1_OFFSET 0x0000 +#define SAR_BANK2_OFFSET 0x1000 +#define SAR_BANK3_OFFSET 0x2000 +#define SAR_BANK4_OFFSET 0x3000 + +extern void __iomem *sar_ram_base; + +#endif diff --git a/arch/arm/plat-omap/include/plat/omap44xx.h b/arch/arm/plat-omap/include/plat/omap44xx.h index ea2b8a6..c0d478e 100644 --- a/arch/arm/plat-omap/include/plat/omap44xx.h +++ b/arch/arm/plat-omap/include/plat/omap44xx.h @@ -45,6 +45,7 @@ #define OMAP44XX_WKUPGEN_BASE 0x48281000 #define OMAP44XX_MCPDM_BASE 0x40132000 #define OMAP44XX_MCPDM_L3_BASE 0x49032000 +#define OMAP44XX_SAR_RAM_BASE 0x4a326000 #define OMAP44XX_MAILBOX_BASE (L4_44XX_BASE + 0xF4000) #define OMAP44XX_HSUSB_OTG_BASE (L4_44XX_BASE + 0xAB000)