From patchwork Tue Feb 25 22:17:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Mayer X-Patchwork-Id: 3719171 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 328379F2F7 for ; Tue, 25 Feb 2014 22:19:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 29E2A201F0 for ; Tue, 25 Feb 2014 22:19:41 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1B0B32014A for ; Tue, 25 Feb 2014 22:19:40 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WIQKz-0000YM-7N; Tue, 25 Feb 2014 22:18:53 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WIQKp-0000wV-Pq; Tue, 25 Feb 2014 22:18:43 +0000 Received: from mail-gw3-out.broadcom.com ([216.31.210.64]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WIQKm-0000uK-Lj for linux-arm-kernel@lists.infradead.org; Tue, 25 Feb 2014 22:18:41 +0000 X-IronPort-AV: E=Sophos;i="4.97,542,1389772800"; d="scan'208";a="16363943" Received: from irvexchcas08.broadcom.com (HELO IRVEXCHCAS08.corp.ad.broadcom.com) ([10.9.208.57]) by mail-gw3-out.broadcom.com with ESMTP; 25 Feb 2014 14:29:44 -0800 Received: from IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) by IRVEXCHCAS08.corp.ad.broadcom.com (10.9.208.57) with Microsoft SMTP Server (TLS) id 14.3.174.1; Tue, 25 Feb 2014 14:18:17 -0800 Received: from mail-irva-13.broadcom.com (10.10.10.20) by IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) with Microsoft SMTP Server id 14.3.174.1; Tue, 25 Feb 2014 14:18:17 -0800 Received: from mail.broadcom.com (lbrmn-lnxub70.ric.broadcom.com [10.136.8.215]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id 31B5BEEBB8; Tue, 25 Feb 2014 14:18:17 -0800 (PST) From: Markus Mayer To: Matt Porter , Christian Daudt Subject: [PATCH 2/4] ARM: bcm281xx: Consolidate reboot code Date: Tue, 25 Feb 2014 14:17:44 -0800 Message-ID: <1393366666-28625-3-git-send-email-markus.mayer@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1393366666-28625-1-git-send-email-markus.mayer@linaro.org> References: <1393366666-28625-1-git-send-email-markus.mayer@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140225_171840_981905_25D10509 X-CRM114-Status: GOOD ( 16.88 ) X-Spam-Score: -1.2 (-) Cc: Linux Kernel Mailing List , ARM Kernel List X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Consolidate reboot code and remove unnecessary functions. Signed-off-by: Markus Mayer --- arch/arm/mach-bcm/board_bcm281xx.c | 46 ++++++++++++++++++++++++--------- arch/arm/mach-bcm/kona.c | 50 ------------------------------------ arch/arm/mach-bcm/kona.h | 4 --- 3 files changed, 34 insertions(+), 66 deletions(-) diff --git a/arch/arm/mach-bcm/board_bcm281xx.c b/arch/arm/mach-bcm/board_bcm281xx.c index 4874f56..e0d0bc5e 100644 --- a/arch/arm/mach-bcm/board_bcm281xx.c +++ b/arch/arm/mach-bcm/board_bcm281xx.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012-2013 Broadcom Corporation + * Copyright (C) 2012-2014 Broadcom Corporation * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as @@ -19,25 +19,47 @@ #include "kona.h" -static void bcm_board_setup_restart(void) +#define SECWDOG_OFFSET 0x00000000 +#define SECWDOG_RESERVED_MASK 0xe2000000 +#define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000 +#define SECWDOG_EN_MASK 0x08000000 +#define SECWDOG_SRSTEN_MASK 0x04000000 +#define SECWDOG_CLKS_SHIFT 20 +#define SECWDOG_COUNT_SHIFT 0 + +static void bcm281xx_restart(enum reboot_mode mode, const char *cmd) { - struct device_node *np; + uint32_t val; + void __iomem *base; + struct device_node *np_wdog; - np = of_find_compatible_node(NULL, NULL, "brcm,bcm11351"); - if (np) { - if (of_device_is_available(np)) - bcm_kona_setup_restart(); - of_node_put(np); + np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt"); + if (!np_wdog) { + pr_emerg("Couldn't find brcm,kona-wdt\n"); + return; + } + base = of_iomap(np_wdog, 0); + if (!base) { + pr_emerg("Couldn't map brcm,kona-wdt\n"); + return; } - /* Restart setup for other boards goes here */ + + /* Enable watchdog with short timeout (244us). */ + val = readl(base + SECWDOG_OFFSET); + val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK; + val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK | + (0x15 << SECWDOG_CLKS_SHIFT) | + (0x8 << SECWDOG_COUNT_SHIFT); + writel(val, base + SECWDOG_OFFSET); + + /* Wait for reset */ + while (1); } static void __init board_init(void) { of_platform_populate(NULL, of_default_bus_match_table, NULL, &platform_bus); - - bcm_board_setup_restart(); kona_l2_cache_init(); } @@ -45,6 +67,6 @@ static const char * const bcm11351_dt_compat[] = { "brcm,bcm11351", NULL, }; DT_MACHINE_START(BCM11351_DT, "BCM281xx Broadcom Application Processor") .init_machine = board_init, - .restart = bcm_kona_restart, + .restart = bcm281xx_restart, .dt_compat = bcm11351_dt_compat, MACHINE_END diff --git a/arch/arm/mach-bcm/kona.c b/arch/arm/mach-bcm/kona.c index 2f1db29..768bc28 100644 --- a/arch/arm/mach-bcm/kona.c +++ b/arch/arm/mach-bcm/kona.c @@ -11,10 +11,8 @@ * GNU General Public License for more details. */ -#include #include #include -#include #include "bcm_kona_smc.h" #include "kona.h" @@ -43,51 +41,3 @@ void __init kona_l2_cache_init(void) if (ret) pr_err("Couldn't enable L2 cache: %d\n", ret); } - -static void __iomem *watchdog_base; - -void bcm_kona_setup_restart(void) -{ - struct device_node *np_wdog; - - /* - * The assumption is that whoever calls bcm_kona_setup_restart() - * also needs a Kona Watchdog Timer entry in Device Tree, i.e. we - * report an error if the DT entry is missing. - */ - np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt"); - if (!np_wdog) { - pr_err("brcm,kona-wdt not found in DT, reboot disabled\n"); - return; - } - watchdog_base = of_iomap(np_wdog, 0); - WARN(!watchdog_base, "failed to map watchdog base"); - of_node_put(np_wdog); -} - -#define SECWDOG_OFFSET 0x00000000 -#define SECWDOG_RESERVED_MASK 0xE2000000 -#define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000 -#define SECWDOG_EN_MASK 0x08000000 -#define SECWDOG_SRSTEN_MASK 0x04000000 -#define SECWDOG_CLKS_SHIFT 20 -#define SECWDOG_LOCK_SHIFT 0 - -void bcm_kona_restart(enum reboot_mode mode, const char *cmd) -{ - uint32_t val; - - if (!watchdog_base) - panic("Watchdog not mapped. Reboot failed.\n"); - - /* Enable watchdog2 with very short timeout. */ - val = readl(watchdog_base + SECWDOG_OFFSET); - val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK; - val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK | - (0x8 << SECWDOG_CLKS_SHIFT) | - (0x8 << SECWDOG_LOCK_SHIFT); - writel(val, watchdog_base + SECWDOG_OFFSET); - - while (1) - ; -} diff --git a/arch/arm/mach-bcm/kona.h b/arch/arm/mach-bcm/kona.h index f42aef8..3a7a017 100644 --- a/arch/arm/mach-bcm/kona.h +++ b/arch/arm/mach-bcm/kona.h @@ -11,8 +11,4 @@ * GNU General Public License for more details. */ -#include - void __init kona_l2_cache_init(void); -void bcm_kona_setup_restart(void); -void bcm_kona_restart(enum reboot_mode mode, const char *cmd);