From patchwork Sat Nov 10 18:11:01 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 10677381 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 EA25915E9 for ; Sat, 10 Nov 2018 18:11:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DF6362C918 for ; Sat, 10 Nov 2018 18:11:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D2B1B2C91A; Sat, 10 Nov 2018 18:11:26 +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=unavailable 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 7EC2C2C916 for ; Sat, 10 Nov 2018 18:11:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727214AbeKKD5B (ORCPT ); Sat, 10 Nov 2018 22:57:01 -0500 Received: from mga02.intel.com ([134.134.136.20]:37029 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727068AbeKKD5B (ORCPT ); Sat, 10 Nov 2018 22:57:01 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Nov 2018 10:11:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,488,1534834800"; d="scan'208";a="107537164" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 10 Nov 2018 10:11:03 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 117037C6; Sat, 10 Nov 2018 20:11:03 +0200 (EET) From: Andy Shevchenko To: MyungJoo Ham , Chanwoo Choi , linux-usb@vger.kernel.org, Felipe Balbi , Guenter Roeck , Heikki Krogerus , Roger Quadros , linux-pm@vger.kernel.org, "Rafael J. Wysocki" , Sebastian Reichel , linux-omap@vger.kernel.org, Darren Hart , platform-driver-x86@vger.kernel.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Chen-Yu Tsai , Hans de Goede Cc: Andy Shevchenko Subject: [PATCH v1 5/5] usb: dwc3: drd: Add support for DR detection through extcon Date: Sat, 10 Nov 2018 20:11:01 +0200 Message-Id: <20181110181101.24557-5-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181110181101.24557-1-andriy.shevchenko@linux.intel.com> References: <20181110181101.24557-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 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 Allow extcon device, found by name, to provide DR status for USB. This is needed, for example, in case of Intel Merrifield platform, where the Intel Basin Cove PMIC provides an extcon device to communicate the detected role. Note, that the "linux,extcon-name" property name is only for kernel internal use by X86/ACPI platform code and as such is not documented in the device tree bindings. Signed-off-by: Andy Shevchenko --- drivers/usb/dwc3/drd.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 5dc4cddd5b68..d6b47829fdca 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -485,10 +485,20 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) struct device *dev = dwc->dev; struct device_node *np_phy, *np_conn; struct extcon_dev *edev; + const char *name; if (device_property_read_bool(dev, "extcon")) return extcon_get_edev_by_phandle(dev, 0); + /* + * Device tree platforms should get extcon via phandle. + * On ACPI platforms, we get the name from a device property. + * This device property is for kernel internal use only and + * is expected to be set by the glue code. + */ + if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) + return extcon_get_extcon_dev(name); + np_phy = of_parse_phandle(dev->of_node, "phys", 0); np_conn = of_graph_get_remote_node(np_phy, -1, -1);