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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 E7E4AC433E0 for ; Wed, 20 Jan 2021 14:57:40 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 9611123381 for ; Wed, 20 Jan 2021 14:57:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9611123381 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.71502.128109 (Exim 4.92) (envelope-from ) id 1l2EvK-0001Xy-IV; Wed, 20 Jan 2021 14:57:30 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 71502.128109; Wed, 20 Jan 2021 14:57:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l2EvK-0001Xq-F5; Wed, 20 Jan 2021 14:57:30 +0000 Received: by outflank-mailman (input) for mailman id 71502; Wed, 20 Jan 2021 14:57:29 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l2EvJ-0001XS-50 for xen-devel@lists.xenproject.org; Wed, 20 Jan 2021 14:57:29 +0000 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTP id 0efafb98-20fd-4620-839d-852ac59921e8; Wed, 20 Jan 2021 14:57:27 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E5DCB31B; Wed, 20 Jan 2021 06:57:26 -0800 (PST) Received: from scm-wfh-server-rahsin01.stack04.eu02.mi.arm.com (unknown [10.58.246.76]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 294963F68F; Wed, 20 Jan 2021 06:57:26 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 0efafb98-20fd-4620-839d-852ac59921e8 From: Rahul Singh To: xen-devel@lists.xenproject.org Cc: bertrand.marquis@arm.com, rahul.singh@arm.com, Stefano Stabellini , Julien Grall Subject: [PATCH v5 06/10] xen/device-tree: Add dt_property_match_string helper Date: Wed, 20 Jan 2021 14:52:40 +0000 Message-Id: <720eb04dcd2a2c8b9d7d8c96b0064af4465ca207.1611153615.git.rahul.singh@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Import the Linux helper of_property_match_string. This function searches a string list property and returns the index of a specific string value. Signed-off-by: Rahul Singh Reviewed-by: Bertrand Marquis Reviewed-by: Stefano Stabellini --- Changes since v2: - This patch is introduce in this verison. Changes since v3: No changes Changes since v4: No changes --- --- xen/common/device_tree.c | 27 +++++++++++++++++++++++++++ xen/include/xen/device_tree.h | 12 ++++++++++++ 2 files changed, 39 insertions(+) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index e107c6f89f..18825e333e 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -208,6 +208,33 @@ int dt_property_read_string(const struct dt_device_node *np, return 0; } +int dt_property_match_string(const struct dt_device_node *np, + const char *propname, const char *string) +{ + const struct dt_property *dtprop = dt_find_property(np, propname, NULL); + size_t l; + int i; + const char *p, *end; + + if ( !dtprop ) + return -EINVAL; + if ( !dtprop->value ) + return -ENODATA; + + p = dtprop->value; + end = p + dtprop->length; + + for ( i = 0; p < end; i++, p += l ) + { + l = strnlen(p, end - p) + 1; + if ( p + l > end ) + return -EILSEQ; + if ( strcmp(string, p) == 0 ) + return i; /* Found it; return index */ + } + return -ENODATA; +} + bool_t dt_device_is_compatible(const struct dt_device_node *device, const char *compat) { diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index f2ad22b79c..b02696be94 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -400,6 +400,18 @@ static inline bool_t dt_property_read_bool(const struct dt_device_node *np, int dt_property_read_string(const struct dt_device_node *np, const char *propname, const char **out_string); +/** + * dt_property_match_string() - Find string in a list and return index + * @np: pointer to node containing string list property + * @propname: string list property name + * @string: pointer to string to search for in string list + * + * This function searches a string list property and returns the index + * of a specific string value. + */ +int dt_property_match_string(const struct dt_device_node *np, + const char *propname, const char *string); + /** * Checks if the given "compat" string matches one of the strings in * the device's "compatible" property -- 2.17.1