From patchwork Tue Jul 2 20:38:58 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loc Ho X-Patchwork-Id: 2814581 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 8FAC99F3EB for ; Tue, 2 Jul 2013 20:40:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5BE6320196 for ; Tue, 2 Jul 2013 20:40:23 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CF9CE2018A for ; Tue, 2 Jul 2013 20:40:21 +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 1Uu7Ma-0003qF-3a; Tue, 02 Jul 2013 20:39:48 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Uu7MT-0001dw-Fg; Tue, 02 Jul 2013 20:39:41 +0000 Received: from exprod5og104.obsmtp.com ([64.18.0.178]) by merlin.infradead.org with smtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Uu7ML-0001aJ-Jw for linux-arm-kernel@lists.infradead.org; Tue, 02 Jul 2013 20:39:35 +0000 Received: from mail-oa0-f45.google.com ([209.85.219.45]) (using TLSv1) by exprod5ob104.postini.com ([64.18.4.12]) with SMTP ID DSNKUdM6cOUPFmUxxO3ZpWaCCMpBcPe1/UjO@postini.com; Tue, 02 Jul 2013 13:39:33 PDT Received: by mail-oa0-f45.google.com with SMTP id j1so6926717oag.4 for ; Tue, 02 Jul 2013 13:39:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=cV1KyfxxBTSqfV8xtotD1AREaKevEtIRaSaXGZWikSA=; b=Aqa7KUw4bhZwpdihUKqyPQgYEHgh191f2mY37IDXg8Wb8n+b4FEyvR/wV/GxJVWDuc 7DRrXuRCG+GZ2MLDp6B9JtjM0Sp+lRDsYeWNtcTEiiuvEsif56ucSaPOM3pCUVm2pKP1 eUUZuF1B+0CxK4OoLb8Rbyf+6VUtZ/NlNqnXH6G8sWk4ATLQIklStr/mQPX/87DQrq2d 92VvG2rZgGliecM3vh95nNjaYVnTF3t69ghia0UbJTOwl0gRcVM7+0rXvKa4tPoVyZxc WroQqD7tHNs/zExw672xFnGL/VHB2c8b83oahc//osjtEpmPFg/LqNpnnVjSxns6lJN0 W+Nw== X-Received: by 10.182.130.228 with SMTP id oh4mr14310295obb.38.1372797552068; Tue, 02 Jul 2013 13:39:12 -0700 (PDT) X-Received: by 10.182.130.228 with SMTP id oh4mr14310280obb.38.1372797551966; Tue, 02 Jul 2013 13:39:11 -0700 (PDT) Received: from localhost ([198.137.200.11]) by mx.google.com with ESMTPSA id rs4sm6579788obc.10.2013.07.02.13.39.10 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 02 Jul 2013 13:39:11 -0700 (PDT) From: Loc Ho To: cbou@mail.ru, dwmw2@infradead.org, fkan@apm.com, ksankaran@apm.com Subject: [PATCH 1/2] power: Add APM X-Gene system reboot driver Date: Tue, 2 Jul 2013 14:38:58 -0600 Message-Id: <1372797539-13111-2-git-send-email-lho@apm.com> X-Mailer: git-send-email 1.5.5 In-Reply-To: <1372797539-13111-1-git-send-email-lho@apm.com> References: <1372797539-13111-1-git-send-email-lho@apm.com> X-Gm-Message-State: ALoCoQkUnUhte47EBDH1cq3RANJgu4fd8JUWTRNkCOveyMiiTR8fL5xVypyWF1O+myBPA3czPzbZXyz+LbUBkvcS+pni6/cXXPnq3SzupH10Pz8if9LiNBFjYgSnltJZ2kg2KiIq3To5sIx0SyqnxR7EDs7kXzVX54HxsUDBYw58lZ3qaCd3oqThifzhwU7c4qUfmXmlPnr7 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130702_163933_907125_30B74134 X-CRM114-Status: GOOD ( 20.39 ) X-Spam-Score: -4.2 (----) Cc: Catalin.Marinas@arm.com, devicetree-discuss@lists.ozlabs.org, Loc Ho , linux-arm-kernel@lists.infradead.org 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: , MIME-Version: 1.0 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 power: Add APM X-Gene SoC system reboot driver. This driver handles only system reboot. System shutdown is board specific and can be handled by board driver or GPIO based shutdown driver. Signed-off-by: Loc Ho Signed-off-by: Feng Kan Signed-off-by: Kumar Sankaran --- drivers/power/reset/Kconfig | 7 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/xgene-reboot.c | 101 ++++++++++++++++++++++++++++++++++++ 3 files changed, 109 insertions(+), 0 deletions(-) create mode 100755 drivers/power/reset/xgene-reboot.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 349e9ae..c41a7de 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -37,3 +37,10 @@ config POWER_RESET_VEXPRESS help Power off and reset support for the ARM Ltd. Versatile Express boards. + +config POWER_RESET_XGENE + bool + default y if ARM64 + depends on POWER_RESET + help + Reboot support for the APM SoC X-Gene Eval boards. diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 372807f..e75d54c 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o +obj-$(CONFIG_POWER_RESET_XGENE) += xgene-reboot.o diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c new file mode 100755 index 0000000..e6e4178 --- /dev/null +++ b/drivers/power/reset/xgene-reboot.c @@ -0,0 +1,101 @@ +/* + * xgene-reboot.c - AppliedMicro X-Gene SoC Reboot Driver + * + * Copyright (c) 2013, Applied Micro Circuits Corporation + * Author: Feng Kan + * Author: Loc Ho + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * This driver provides system reboot functionality for APM X-Gene SoC. + * For system shutdown, this is board specify. If a board designer + * implements GPIO shutdown, use the gpio-poweroff.c driver. + * + */ +#include +#include +#include +#include +#include +#include +#include + +struct xgene_reboot_context { + struct platform_device *pdev; + void *csr; + u32 mask; +}; + +static struct xgene_reboot_context *xgene_restart_ctx; + +static void xgene_restart(char str, const char *cmd) +{ + struct xgene_reboot_context *ctx = xgene_restart_ctx; + unsigned long timeout; + + /* Issue the reboot */ + if (ctx) + writel(ctx->mask, ctx->csr); + + timeout = jiffies + HZ; + while (time_before(jiffies, timeout)) + cpu_relax(); + + dev_emerg(&ctx->pdev->dev, "Unable to restart system\n"); +} + +static int xgene_reboot_probe(struct platform_device *pdev) +{ + struct xgene_reboot_context *ctx; + + ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); + if (ctx == NULL) { + dev_err(&pdev->dev, "out of memory for context\n"); + return -ENODEV; + } + ctx->csr = of_iomap(pdev->dev.of_node, 0); + if (ctx->csr == NULL) { + devm_kfree(&pdev->dev, ctx); + dev_err(&pdev->dev, "can not map resource\n"); + return -ENODEV; + } + if (of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask)) + ctx->mask = 0xFFFFFFFF; + ctx->pdev = pdev; + arm_pm_restart = xgene_restart; + xgene_restart_ctx = ctx; + + return 0; +} + +static struct of_device_id xgene_reboot_of_match[] = { + { .compatible = "apm,xgene-reboot" }, + {} +}; + +static struct platform_driver xgene_reboot_driver = { + .probe = xgene_reboot_probe, + .driver = { + .name = "xgene-reboot", + .of_match_table = xgene_reboot_of_match, + }, +}; + +static int __init xgene_reboot_init(void) +{ + return platform_driver_register(&xgene_reboot_driver); +} +device_initcall(xgene_reboot_init);