From patchwork Fri Aug 12 22:54:46 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Warren X-Patchwork-Id: 1062202 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p7CMtvcs006292 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 12 Aug 2011 22:56:17 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qs0dd-0005dy-N0; Fri, 12 Aug 2011 22:55:38 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qs0dc-00086g-Rc; Fri, 12 Aug 2011 22:55:36 +0000 Received: from avon.wwwdotorg.org ([2001:470:1f0f:bd7::2]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qs0dC-00080D-RL for linux-arm-kernel@lists.infradead.org; Fri, 12 Aug 2011 22:55:11 +0000 Received: from severn.wwwdotorg.org (unknown [192.168.65.5]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by avon.wwwdotorg.org (Postfix) with ESMTPS id C8D40634F; Fri, 12 Aug 2011 16:56:09 -0600 (MDT) Received: from localhost.localdomain (searspoint.nvidia.com [216.228.112.21]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by severn.wwwdotorg.org (Postfix) with ESMTPSA id 01914E4107; Fri, 12 Aug 2011 16:55:04 -0600 (MDT) From: Stephen Warren To: Grant Likely , Colin Cross , Erik Gilling , Olof Johansson Subject: [RFC PATCH 01/12] dt: Add of_find_child_node_by_name() Date: Fri, 12 Aug 2011 16:54:46 -0600 Message-Id: <1313189697-21287-2-git-send-email-swarren@nvidia.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1313189697-21287-1-git-send-email-swarren@nvidia.com> References: <1313189697-21287-1-git-send-email-swarren@nvidia.com> X-Virus-Scanned: clamav-milter 0.96.5 at avon.wwwdotorg.org X-Virus-Status: Clean X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110812_185511_080041_CFF0F892 X-CRM114-Status: GOOD ( 12.91 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- Cc: Russell King , Arnd Bergmann , devicetree-discuss@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, Stephen Warren , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Fri, 12 Aug 2011 22:56:17 +0000 (UTC) This function retrieves a named child node of a given parent node. Signed-off-by: Stephen Warren --- drivers/of/base.c | 18 ++++++++++++++++++ include/linux/of.h | 2 ++ 2 files changed, 20 insertions(+), 0 deletions(-) diff --git a/drivers/of/base.c b/drivers/of/base.c index 3ff22e3..7eea9e3 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -388,6 +388,24 @@ struct device_node *of_find_node_by_name(struct device_node *from, } EXPORT_SYMBOL(of_find_node_by_name); +struct device_node *of_find_child_node_by_name( + const struct device_node *parent, const char *name) +{ + struct device_node *child; + + read_lock(&devtree_lock); + + for_each_child_of_node(parent, child) { + if (!strcmp(child->name, name)) + break; + } + + read_unlock(&devtree_lock); + + return child; +} +EXPORT_SYMBOL(of_find_child_node_by_name); + /** * of_find_node_by_type - Find a node by its "device_type" property * @from: The node to start searching from, or NULL to start searching diff --git a/include/linux/of.h b/include/linux/of.h index 9180dc5..032c71b 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -161,6 +161,8 @@ extern struct device_node *of_find_node_by_name(struct device_node *from, #define for_each_node_by_name(dn, name) \ for (dn = of_find_node_by_name(NULL, name); dn; \ dn = of_find_node_by_name(dn, name)) +extern struct device_node *of_find_child_node_by_name( + const struct device_node *node, const char *name); extern struct device_node *of_find_node_by_type(struct device_node *from, const char *type); #define for_each_node_by_type(dn, type) \