From patchwork Wed Mar 20 18:49:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 10862439 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72B4F1390 for ; Wed, 20 Mar 2019 18:51:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B95229E67 for ; Wed, 20 Mar 2019 18:51:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4FDDE29E6A; Wed, 20 Mar 2019 18:51:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA11B29E67 for ; Wed, 20 Mar 2019 18:51:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727698AbfCTSuv (ORCPT ); Wed, 20 Mar 2019 14:50:51 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:45046 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727696AbfCTSuu (ORCPT ); Wed, 20 Mar 2019 14:50:50 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9D0161A25; Wed, 20 Mar 2019 11:50:49 -0700 (PDT) Received: from en101.cambridge.arm.com (en101.cambridge.arm.com [10.1.196.93]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id F41563F59C; Wed, 20 Mar 2019 11:50:47 -0700 (PDT) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, coresight@lists.linaro.org, mike.leach@linaro.org, robert.walker@arm.com, Suzuki K Poulose , Mathieu Poirier , "Rafael J. Wysocki" Subject: [PATCH 23/25] coresight: stm: ACPI support for parsing stimulus base Date: Wed, 20 Mar 2019 18:49:40 +0000 Message-Id: <1553107783-3340-24-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1553107783-3340-1-git-send-email-suzuki.poulose@arm.com> References: <1553107783-3340-1-git-send-email-suzuki.poulose@arm.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The stimulus base for STM device must be listed as the second memory resource, followed by the programming base address. Add support for parsing the information for ACPI. Cc: Mathieu Poirier Cc: "Rafael J. Wysocki" Signed-off-by: Suzuki K Poulose --- drivers/hwtracing/coresight/coresight-stm.c | 43 +++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index d94ae22..995443a 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -16,6 +16,7 @@ * (C) 2015-2016 Chunyan Zhang */ #include +#include #include #include #include @@ -717,10 +718,52 @@ static inline int of_stm_get_stimulus_area(struct device *dev, } #endif +#ifdef CONFIG_ACPI +static int acpi_stm_get_stimulus_area(struct device *dev, struct resource *res) +{ + int rc; + bool found_base = false; + struct resource_entry *rent; + LIST_HEAD(res_list); + + struct acpi_device *adev = ACPI_COMPANION(dev); + + if (!adev) + return -ENODEV; + rc = acpi_dev_get_resources(adev, &res_list, NULL, NULL); + if (rc < 0) + return rc; + + rc = -ENOENT; + list_for_each_entry(rent, &res_list, node) { + if (resource_type(rent->res) != IORESOURCE_MEM) + continue; + if (found_base) { + *res = *rent->res; + rc = 0; + break; + } + + found_base = true; + } + + acpi_dev_free_resource_list(&res_list); + return rc; +} +#else +static inline int acpi_stm_get_stimulus_area(struct device *dev, + struct resource *res) +{ + return -ENOENT; +} +#endif + static int stm_get_stimulus_area(struct device *dev, struct resource *res) { if (dev->of_node) return of_stm_get_stimulus_area(dev, res); + else if (is_acpi_node(dev->fwnode)) + return acpi_stm_get_stimulus_area(dev, res); return -ENOENT; }