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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 D6BFCC3A59D for ; Mon, 19 Aug 2019 10:07:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B47932087B for ; Mon, 19 Aug 2019 10:07:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727231AbfHSKHb (ORCPT ); Mon, 19 Aug 2019 06:07:31 -0400 Received: from mga03.intel.com ([134.134.136.65]:8477 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726550AbfHSKH3 (ORCPT ); Mon, 19 Aug 2019 06:07:29 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Aug 2019 03:07:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,403,1559545200"; d="scan'208";a="195506068" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 19 Aug 2019 03:07:27 -0700 From: Heikki Krogerus To: "Rafael J. Wysocki" , Andy Shevchenko , Hans de Goede Cc: Greg Kroah-Hartman , Darren Hart , linux-kernel@vger.kernel.org Subject: [PATCH v3 1/3] software node: Add software_node_find_by_name() Date: Mon, 19 Aug 2019 13:07:22 +0300 Message-Id: <20190819100724.30051-2-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.23.0.rc1 In-Reply-To: <20190819100724.30051-1-heikki.krogerus@linux.intel.com> References: <20190819100724.30051-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Function that searches software nodes by node name. Signed-off-by: Heikki Krogerus Reviewed-by: Hans de Goede Tested-by: Hans de Goede Reviewed-by: Andy Shevchenko --- drivers/base/swnode.c | 37 +++++++++++++++++++++++++++++++++++++ include/linux/property.h | 4 ++++ 2 files changed, 41 insertions(+) diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index e7b3aa3bd55a..ee2a405cca9a 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -620,6 +620,43 @@ static const struct fwnode_operations software_node_ops = { /* -------------------------------------------------------------------------- */ +/** + * software_node_find_by_name - Find software node by name + * @parent: Parent of the software node + * @name: Name of the software node + * + * The function will find a node that is child of @parent and that is named + * @name. If no node is found, the function returns NULL. + * + * NOTE: you will need to drop the reference with fwnode_handle_put() after use. + */ +const struct software_node * +software_node_find_by_name(const struct software_node *parent, const char *name) +{ + struct swnode *swnode; + struct kobject *k; + + if (!name) + return NULL; + + spin_lock(&swnode_kset->list_lock); + + list_for_each_entry(k, &swnode_kset->list, entry) { + swnode = kobj_to_swnode(k); + if (parent == swnode->node->parent && swnode->node->name && + !strcmp(name, swnode->node->name)) { + kobject_get(&swnode->kobj); + break; + } + swnode = NULL; + } + + spin_unlock(&swnode_kset->list_lock); + + return swnode ? swnode->node : NULL; +} +EXPORT_SYMBOL_GPL(software_node_find_by_name); + static int software_node_register_properties(struct software_node *node, const struct property_entry *properties) diff --git a/include/linux/property.h b/include/linux/property.h index 5a910ad79591..9b3d4ca3a73a 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -421,6 +421,10 @@ bool is_software_node(const struct fwnode_handle *fwnode); const struct software_node *to_software_node(struct fwnode_handle *fwnode); struct fwnode_handle *software_node_fwnode(const struct software_node *node); +const struct software_node * +software_node_find_by_name(const struct software_node *parent, + const char *name); + int software_node_register_nodes(const struct software_node *nodes); void software_node_unregister_nodes(const struct software_node *nodes); -- 2.23.0.rc1