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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 C8C20C18E7D for ; Wed, 22 May 2019 10:39:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8CF2420856 for ; Wed, 22 May 2019 10:39:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="AUAK87im" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8CF2420856 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=BmWRryqKSE5mO/qONBO5MxS9/MPKRSa2i82x6/Ghjhw=; b=AUAK87imOBDLY8kaxhmiQW+adj 5gJLtqaRw2fA97al7ogQV6wvvuxjPbYsnd5RdAReE6dlk+hHD7c/cV/YnrynaPdaLXEnuqfZBcduG zgpIgtZzspt90BgRd/H07P6SnMwVQqqttWUb7la5Q+8i1X/TiM2zilHz+OQj9zYyNlB0stfAWV4yE A+wSIoENMV8aw5w/IlpidZrWPo58LbWV1HpjT4QDDaODi9ORhtAa7lkuCj4e00/nQtxh1Ik/A6DMK I3IdF3b/ZSRZ4eLc/CADNnj48mAMuliGgH8+M5Oag64soCBrFSrGkjBE/Gg+FSbgVQ+BdW7R67aor OwTIxhtQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hTOey-0001So-3T; Wed, 22 May 2019 10:39:48 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hTObB-0004m3-Mh for linux-arm-kernel@lists.infradead.org; Wed, 22 May 2019 10:36:13 +0000 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 A28EE1682; Wed, 22 May 2019 03:35:53 -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 6B7B53F575; Wed, 22 May 2019 03:35:52 -0700 (PDT) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 27/30] coresight: stm: ACPI support for parsing stimulus base Date: Wed, 22 May 2019 11:35:00 +0100 Message-Id: <1558521304-27469-28-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1558521304-27469-1-git-send-email-suzuki.poulose@arm.com> References: <1558521304-27469-1-git-send-email-suzuki.poulose@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190522_033554_152732_325BF393 X-CRM114-Status: GOOD ( 14.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: coresight@lists.linaro.org, "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org, Suzuki K Poulose MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The stimulus base for STM device must be listed as the second memory resource, followed by the programming base address as described in "Section 2.3 Resources" in ACPI for CoreSightTM 1.0 Platform Design documen (DEN0067). Add support for parsing the information for ACPI. Cc: "Rafael J. Wysocki" Reviewed-by: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- drivers/hwtracing/coresight/coresight-stm.c | 53 ++++++++++++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index e3e2b00..b908ca1 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 @@ -716,10 +717,60 @@ 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; + + /* + * The stimulus base for STM device must be listed as the second memory + * resource, followed by the programming base address as described in + * "Section 2.3 Resources" in ACPI for CoreSightTM 1.0 Platform Design + * document (DEN0067). + */ + 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 (is_of_node(dev_fwnode(dev))) + struct fwnode_handle *fwnode = dev_fwnode(dev); + + if (is_of_node(fwnode)) return of_stm_get_stimulus_area(dev, res); + else if (is_acpi_node(fwnode)) + return acpi_stm_get_stimulus_area(dev, res); return -ENOENT; } -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel