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_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,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 5B64CC43381 for ; Fri, 8 Mar 2019 06:16:04 +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 261FF20811 for ; Fri, 8 Mar 2019 06:16:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="t7xy+XOt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 261FF20811 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=VtFyKIAoei5FdX2/rBYS6XzXjZuhP6ftGlW6EPP2Btw=; b=t7xy+XOtwppWUF eoexplE0f2NaNe7/n8spmzItXh3LS4NHjg0SBVhIrYFmjLYBnn9jWMXoeNjFdSZAQKOJibGCgOBcF 5ARPuqeRolCtcW9hE0c+vJC6F6TaQRKuGG4v2LLnHdCktvsBKlDKtCNplYGZ8xzrS4Eeb0Isv2G+2 uHe6anmplf7lpxvKcFwUVPW+zyiR05FE3uqDsy0EYnK732wnC4Y6bd5HvFuyjpE+mWRlDwIHH7B+J WvjJQjQFklsXzj7FvCirLpVAocCffOauiXEA/e806MDnwZhUTF7Ep6EX1ftgWUUsezAA9QhMwQmH1 Sya5wk+kPikg6xv5Zmpg==; 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 1h28nV-0004al-4d; Fri, 08 Mar 2019 06:15:57 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h28nR-0004ZI-RB; Fri, 08 Mar 2019 06:15:55 +0000 X-UUID: f87dfcced9894a029ade529314549c28-20190307 X-UUID: f87dfcced9894a029ade529314549c28-20190307 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 589407628; Thu, 07 Mar 2019 22:15:49 -0800 Received: from MTKMBS31N1.mediatek.inc (172.27.4.69) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 7 Mar 2019 22:15:17 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 8 Mar 2019 14:14:44 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 8 Mar 2019 14:14:36 +0800 From: Chunfeng Yun To: Rob Herring , Greg Kroah-Hartman , Heikki Krogerus Subject: [PATCH 3/5] usb: roles: add API to get usb_role_switch by node Date: Fri, 8 Mar 2019 14:13:40 +0800 Message-ID: <1552025622-15582-4-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1552025622-15582-1-git-send-email-chunfeng.yun@mediatek.com> References: <1552025622-15582-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190307_221553_882067_7361C847 X-CRM114-Status: GOOD ( 12.48 ) 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: Mark Rutland , devicetree@vger.kernel.org, Hans de Goede , Badhri Jagan Sridharan , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Matthias Brugger , Andy Shevchenko , linux-mediatek@lists.infradead.org, Min Guo , Chunfeng Yun , Adam Thomson , linux-arm-kernel@lists.infradead.org, Li Jun 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 Add usb_role_switch_get_by_node() to make easier to get usb_role_switch by node which register it. It's useful when there is not device_connection registered between two drivers and only knows the node which register usb_role_switch. Signed-off-by: Chunfeng Yun --- drivers/usb/roles/class.c | 30 ++++++++++++++++++++++++++++++ include/linux/usb/role.h | 1 + 2 files changed, 31 insertions(+) diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index 99116af07f1d..284b19856dc4 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -11,6 +11,7 @@ #include #include #include +#include #include static struct class *role_class; @@ -121,6 +122,35 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev) } EXPORT_SYMBOL_GPL(usb_role_switch_get); +static int __switch_match_node(struct device *dev, const void *node) +{ + return dev->parent->of_node == (const struct device_node *)node; +} + +/** + * usb_role_switch_get_by_node - Find USB role switch by it's parent node + * @node: The node that register USB role switch + * + * Finds and returns role switch registered by @node. The reference count + * for the found switch is incremented. + */ +struct usb_role_switch *usb_role_switch_get_by_node(struct device_node *node) +{ + struct usb_role_switch *sw; + struct device *dev; + + dev = class_find_device(role_class, NULL, node, + __switch_match_node); + if (!dev) + return ERR_PTR(-EPROBE_DEFER); + + sw = to_role_switch(dev); + WARN_ON(!try_module_get(sw->dev.parent->driver->owner)); + + return sw; +} +EXPORT_SYMBOL_GPL(usb_role_switch_get_by_node); + /** * usb_role_switch_put - Release handle to a switch * @sw: USB Role Switch diff --git a/include/linux/usb/role.h b/include/linux/usb/role.h index edc51be4a77c..056498b83dee 100644 --- a/include/linux/usb/role.h +++ b/include/linux/usb/role.h @@ -42,6 +42,7 @@ struct usb_role_switch_desc { int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role); enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw); +struct usb_role_switch *usb_role_switch_get_by_node(struct device_node *node); struct usb_role_switch *usb_role_switch_get(struct device *dev); void usb_role_switch_put(struct usb_role_switch *sw); -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel