From patchwork Wed Apr 24 09:22:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 10914371 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4122B1575 for ; Wed, 24 Apr 2019 09:29:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2D2C3289B5 for ; Wed, 24 Apr 2019 09:29:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 20FD1289C0; Wed, 24 Apr 2019 09:29:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6597289B5 for ; Wed, 24 Apr 2019 09:29:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727435AbfDXJ31 (ORCPT ); Wed, 24 Apr 2019 05:29:27 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:42799 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726176AbfDXJ31 (ORCPT ); Wed, 24 Apr 2019 05:29:27 -0400 X-IronPort-AV: E=Sophos;i="5.60,389,1549897200"; d="scan'208";a="13992920" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 24 Apr 2019 18:29:23 +0900 Received: from be1yocto.ree.adwin.renesas.com (unknown [172.29.43.62]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 4050242A01A9; Wed, 24 Apr 2019 18:29:20 +0900 (JST) From: Biju Das To: Matthias Brugger Cc: Chunfeng Yun , Greg Kroah-Hartman , Heikki Krogerus , Hans de Goede , Andy Shevchenko , Jun Li , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Simon Horman , Geert Uytterhoeven , Chris Paterson , Biju Das , Fabrizio Castro , linux-renesas-soc@vger.kernel.org Subject: [PATCH V5 2/9] usb: roles: add API to get usb_role_switch by node Date: Wed, 24 Apr 2019 10:22:16 +0100 Message-Id: <1556097743-12717-3-git-send-email-biju.das@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1556097743-12717-1-git-send-email-biju.das@bp.renesas.com> References: <1556097743-12717-1-git-send-email-biju.das@bp.renesas.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Chunfeng Yun Add fwnode_usb_role_switch_get() to make easier to get usb_role_switch by fwnode which register it. It's useful when there is not device_connection registered between two drivers and only knows the fwnode which register usb_role_switch. Signed-off-by: Chunfeng Yun Signed-off-by: Biju Das --- * Rebased on top of patch1 in this series. Incorporated Heikki's review comments (https://patchwork.kernel.org/patch/10882555/) Note:- This patch is added to this series to avoid compilation issues. --- drivers/usb/roles/class.c | 25 +++++++++++++++++++++++++ include/linux/usb/role.h | 8 ++++++++ 2 files changed, 33 insertions(+) diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index f45d8df..a0847a8 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -136,6 +136,31 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev) EXPORT_SYMBOL_GPL(usb_role_switch_get); /** + * fwnode_usb_role_switch_get - Find USB role switch by it's parent fwnode + * @fwnode: The fwnode that register USB role switch + * + * Finds and returns role switch registered by @fwnode. The reference count + * for the found switch is incremented. + */ +struct usb_role_switch * +fwnode_usb_role_switch_get(struct fwnode_handle *fwnode) +{ + struct usb_role_switch *sw; + struct device *dev; + + dev = class_find_device(role_class, NULL, fwnode, + switch_fwnode_match); + 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(fwnode_usb_role_switch_get); + +/** * 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 da2b964..0f6e2829 100644 --- a/include/linux/usb/role.h +++ b/include/linux/usb/role.h @@ -47,6 +47,8 @@ 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(struct device *dev); +struct usb_role_switch * +fwnode_usb_role_switch_get(struct fwnode_handle *fwnode); void usb_role_switch_put(struct usb_role_switch *sw); struct usb_role_switch * @@ -70,6 +72,12 @@ static inline struct usb_role_switch *usb_role_switch_get(struct device *dev) return ERR_PTR(-ENODEV); } +struct usb_role_switch * +fwnode_usb_role_switch_get(struct fwnode_handle *fwnode) +{ + return ERR_PTR(-ENODEV); +} + static inline void usb_role_switch_put(struct usb_role_switch *sw) { } static inline struct usb_role_switch *