From patchwork Mon Dec 22 15:11:31 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 5527721 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DFBF79F30B for ; Mon, 22 Dec 2014 15:15:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0F3E02017A for ; Mon, 22 Dec 2014 15:15:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 318AE20172 for ; Mon, 22 Dec 2014 15:15:44 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Y34fl-00077b-Sm; Mon, 22 Dec 2014 15:13:25 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Y34eX-0006V8-OT for linux-arm-kernel@lists.infradead.org; Mon, 22 Dec 2014 15:12:12 +0000 Received: from dude.hi.4.pengutronix.de ([10.1.0.7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1Y34eB-0001GM-02; Mon, 22 Dec 2014 16:11:47 +0100 From: Philipp Zabel To: Grant Likely Subject: [PATCH v6 3/3] of: Add of_graph_get_port_by_id function Date: Mon, 22 Dec 2014 16:11:31 +0100 Message-Id: <1419261091-29888-4-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1419261091-29888-1-git-send-email-p.zabel@pengutronix.de> References: <1419261091-29888-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.7 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141222_071210_061328_E8F38CF6 X-CRM114-Status: GOOD ( 15.68 ) X-Spam-Score: -0.0 (/) Cc: Philipp Zabel , Mathieu Poirier , David Airlie , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Laurent Pinchart , kernel@pengutronix.de, Russell King , Mauro Carvalho Chehab , Guennadi Liakhovetski , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds a function to get a port device tree node by port id, or reg property value. Signed-off-by: Philipp Zabel Acked-by: Laurent Pinchart --- drivers/of/base.c | 26 ++++++++++++++++++++++++++ include/linux/of_graph.h | 7 +++++++ 2 files changed, 33 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index aac66df..c816299 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2080,6 +2080,32 @@ int of_graph_parse_endpoint(const struct device_node *node, EXPORT_SYMBOL(of_graph_parse_endpoint); /** + * of_graph_get_port_by_id() - get the port matching a given id + * @parent: pointer to the parent device node + * @id: id of the port + * + * Return: A 'port' node pointer with refcount incremented. The caller + * has to use of_node_put() on it when done. + */ +struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id) +{ + struct device_node *port; + + for_each_child_of_node(node, port) { + u32 port_id = 0; + + if (of_node_cmp(port->name, "port") != 0) + continue; + of_property_read_u32(port, "reg", &port_id); + if (id == port_id) + return port; + } + + return NULL; +} +EXPORT_SYMBOL(of_graph_get_port_by_id); + +/** * of_graph_get_next_endpoint() - get next endpoint node * @parent: pointer to the parent device node * @prev: previous endpoint node, or NULL to get first diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h index e43442e..3c1c95a 100644 --- a/include/linux/of_graph.h +++ b/include/linux/of_graph.h @@ -40,6 +40,7 @@ struct of_endpoint { #ifdef CONFIG_OF int of_graph_parse_endpoint(const struct device_node *node, struct of_endpoint *endpoint); +struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, struct device_node *previous); struct device_node *of_graph_get_remote_port_parent( @@ -53,6 +54,12 @@ static inline int of_graph_parse_endpoint(const struct device_node *node, return -ENOSYS; } +static inline struct device_node *of_graph_get_port_by_id( + struct device_node *node, u32 id) +{ + return NULL; +} + static inline struct device_node *of_graph_get_next_endpoint( const struct device_node *parent, struct device_node *previous)