From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9106DC6786F for ; Fri, 2 Nov 2018 04:46:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54B042081F for ; Fri, 2 Nov 2018 04:46:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 54B042081F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zte.com.cn Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727751AbeKBNvt (ORCPT ); Fri, 2 Nov 2018 09:51:49 -0400 Received: from out1.zte.com.cn ([202.103.147.172]:36806 "EHLO mxct.zte.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727573AbeKBNvs (ORCPT ); Fri, 2 Nov 2018 09:51:48 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id 4D1A8C4A04FDE5C49DB8; Fri, 2 Nov 2018 12:45:55 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id wA24jmqH095636; Fri, 2 Nov 2018 12:45:48 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018110212462541-8146628 ; Fri, 2 Nov 2018 12:46:25 +0800 From: Peng Hao To: robh+dt@kernel.org, mark.rutland@arm.com, arnd@arndb.de, gregkh@linuxfoundation.org, andy@infradead.org, dvhart@infradead.org Cc: linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, hutao@cn.fujitsu.com, linux-doc@vger.kernel.org, Peng Hao Subject: [PATCH V6 3/8] misc/pvpanic: add MMIO support Date: Fri, 2 Nov 2018 20:56:12 +0800 Message-Id: <1541163378-54047-3-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1541163378-54047-1-git-send-email-peng.hao2@zte.com.cn> References: <1541163378-54047-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-11-02 12:46:25, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-11-02 12:45:32, Serialize complete at 2018-11-02 12:45:32 X-MAIL: mse01.zte.com.cn wA24jmqH095636 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some architectures (e.g. arm64), it's preferable to use MMIO, since this can be used standalone. Add MMIO support to the pvpanic driver. Suggested-by: Andy Shevchenko Acked-by: Mark Rutland Signed-off-by: Peng Hao --- drivers/misc/pvpanic.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c index 49c59e1..22fb487 100644 --- a/drivers/misc/pvpanic.c +++ b/drivers/misc/pvpanic.c @@ -41,7 +41,7 @@ #define PVPANIC_PANICKED (1 << 0) -static u16 port; +static void __iomem *base; static struct acpi_driver pvpanic_driver = { .name = "pvpanic", @@ -57,7 +57,7 @@ static void pvpanic_send_event(unsigned int event) { - outb(event, port); + iowrite8(event, base); } static int @@ -80,7 +80,11 @@ struct resource r; if (acpi_dev_resource_io(res, &r)) { - port = r.start; + base = (void __iomem *) ioport_map(r.start, + r.end - r.start + 1); + return AE_OK; + } else if (acpi_dev_resource_memory(res, &r)) { + base = ioremap(r.start, r.end - r.start + 1); return AE_OK; } @@ -101,7 +105,7 @@ static int pvpanic_add(struct acpi_device *device) acpi_walk_resources(device->handle, METHOD_NAME__CRS, pvpanic_walk_resources, NULL); - if (!port) + if (!base) return -ENODEV; atomic_notifier_chain_register(&panic_notifier_list, @@ -115,6 +119,8 @@ static int pvpanic_remove(struct acpi_device *device) atomic_notifier_chain_unregister(&panic_notifier_list, &pvpanic_panic_nb); + iounmap(base); + return 0; } -- 1.8.3.1