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 AE812C67863 for ; Wed, 24 Oct 2018 09:01:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 62012207DD for ; Wed, 24 Oct 2018 09:01:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 62012207DD 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 S1728005AbeJXR3J (ORCPT ); Wed, 24 Oct 2018 13:29:09 -0400 Received: from mxhk.zte.com.cn ([63.217.80.70]:9726 "EHLO mxhk.zte.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727701AbeJXR3I (ORCPT ); Wed, 24 Oct 2018 13:29:08 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id C5AA0A6F067ED6566F62; Wed, 24 Oct 2018 17:01:51 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id w9O91GTw009097; Wed, 24 Oct 2018 17:01:16 +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 2018102417013658-6460478 ; Wed, 24 Oct 2018 17:01:36 +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, Peng Hao Subject: [PATCH V2 3/4] misc/pvpanic: add support to pvpanic device information by using FDT Date: Thu, 25 Oct 2018 01:12:15 +0800 Message-Id: <1540401136-78500-3-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1540401136-78500-1-git-send-email-peng.hao2@zte.com.cn> References: <1540401136-78500-1-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 2018-10-24 17:01:36, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-10-24 17:01:08, Serialize complete at 2018-10-24 17:01:08 X-MAIL: mse01.zte.com.cn w9O91GTw009097 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org By default, when ACPI tables and FDT coexist for ARM64, current kernel takes precedence over FDT to get device information. This patch increases the way to get information through FDT. Signed-off-by: Peng Hao --- drivers/misc/pvpanic.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 68 insertions(+), 1 deletion(-) diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c index bcfefdd..e4b2b40 100644 --- a/drivers/misc/pvpanic.c +++ b/drivers/misc/pvpanic.c @@ -2,6 +2,7 @@ * pvpanic.c - pvpanic Device Support * * Copyright (C) 2013 Fujitsu. + * Copyright (C) 2018 ZTE. * * 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 @@ -25,6 +26,10 @@ #include #include #include +#include +#include +#include +#include MODULE_AUTHOR("Hu Tao "); MODULE_DESCRIPTION("pvpanic device driver"); @@ -78,6 +83,37 @@ .priority = 1, /* let this called before broken drm_fb_helper */ }; +static int pvpanic_mmio_probe(struct platform_device *pdev) +{ + struct resource *mem; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) + return -EINVAL; + + if (!devm_request_mem_region(&pdev->dev, mem->start, + resource_size(mem), pdev->name)) + return -EBUSY; + + base = devm_ioremap(&pdev->dev, mem->start, + resource_size(mem)); + if (base == NULL) + return -EFAULT; + + atomic_notifier_chain_register(&panic_notifier_list, + &pvpanic_panic_nb); + + return 0; +} + +static int pvpanic_mmio_remove(struct platform_device *pdev) +{ + + atomic_notifier_chain_unregister(&panic_notifier_list, + &pvpanic_panic_nb); + + return 0; +} static acpi_status pvpanic_walk_resources(struct acpi_resource *res, void *context) @@ -135,4 +171,35 @@ static int pvpanic_remove(struct acpi_device *device) return 0; } -module_acpi_driver(pvpanic_driver); +static const struct of_device_id pvpanic_mmio_match[] = { + { .compatible = "qemu,pvpanic-mmio", }, + {}, +}; + +static struct platform_driver pvpanic_mmio_driver = { + .driver = { + .name = "pvpanic-mmio", + .of_match_table = pvpanic_mmio_match, + }, + .probe = pvpanic_mmio_probe, + .remove = pvpanic_mmio_remove, +}; + +static int __init pvpanic_mmio_init(void) +{ + if (acpi_disabled) + return platform_driver_register(&pvpanic_mmio_driver); + else + return acpi_bus_register_driver(&pvpanic_driver); +} + +static void __exit pvpanic_mmio_exit(void) +{ + if (acpi_disabled) + platform_driver_unregister(&pvpanic_mmio_driver); + else + acpi_bus_unregister_driver(&pvpanic_driver); +} + +module_init(pvpanic_mmio_init); +module_exit(pvpanic_mmio_exit); -- 1.8.3.1