From patchwork Mon Jan 20 16:31:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 190607 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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 98DD9C33CAA for ; Mon, 20 Jan 2020 16:32:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6EEFA22527 for ; Mon, 20 Jan 2020 16:32:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="B/hlEJlT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729516AbgATQcD (ORCPT ); Mon, 20 Jan 2020 11:32:03 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:34158 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729462AbgATQbC (ORCPT ); Mon, 20 Jan 2020 11:31:02 -0500 Received: by mail-wr1-f65.google.com with SMTP id t2so133229wrr.1 for ; Mon, 20 Jan 2020 08:31:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=q0F3sFz0+h3FHMff0QjQ0SHaRu2x6ApQiXqi+8cwCoc=; b=B/hlEJlTL+fIjLXMxKm3nVoYjnT4XT5RXh4Fr/mW9OuLB4LHCwI0SgJmzOo2Xb9RcI ManBCVKlAOW/t3qYFFZWNYjcv7t2lK95GsZ9YW60qHQ4netbjr3LLyD6EnXvFhPsfdAy FUbUeMPkXIYRSsKkKa9qZ/G5d8bq3VK43txAwJT0tu4agoIQmBjE7LTfc1KpXwgPwrZ1 naJtf1gYVc1u5vbY5qtMmukR/pSdLJMBfQmSk3fhcFz42IBsmX9VXB9QELxFZIK3BehO HMmxb8KNcdH7NaQi4H33/1YYo8AdC6/SWwE6AEE+MTIjhVnnfyftxViXoWWcGibDS3TJ CiKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=q0F3sFz0+h3FHMff0QjQ0SHaRu2x6ApQiXqi+8cwCoc=; b=kXPTSWBglTkYwEbsc8Pg4JUjITWdBfciSsj6+NHo2+1EQ+0J8w5Ls2+gBSyfi88XIx hm0OO14Mx0obiVudal1gcO77ncchrtlUrpJHv2Tkmz3tcmv82db9uoZTgUCkh6Z+uGdA 3fP486BCZfbYrOZ9MfipSzMsGADObfUWZy1Cifa1vrq5fZQPuozxU8DEzBypj71dDHs5 8mLlPZ65w2J4GTE480jL8AriZee9cmsNXH//xg5EO3RbKc7+bFm9lFdKVA5/5B5oeure 5J4DPrxuL1ytq291yKGousKAzjBvQMVYt4nDlIiVSAFhkEFR4c8zCLqqL+FbK3wa9TBb /sow== X-Gm-Message-State: APjAAAX0nU0VMGS3/Mbw867dZ5fr9CrNzkyuIKYAgkfm6jupXi4mXkyT HTzR2EBHEM4q8lZAYCY49p7Dsxw2Vwg= X-Google-Smtp-Source: APXvYqyNOqDmnv+8BSB1QXFOi3u33eA+uNslImQyu/Uo/GPAvsDSs41AmYIyKFKLifk+xQD6vA/j0g== X-Received: by 2002:adf:dc86:: with SMTP id r6mr371782wrj.68.1579537860898; Mon, 20 Jan 2020 08:31:00 -0800 (PST) Received: from localhost.localdomain ([176.61.57.127]) by smtp.gmail.com with ESMTPSA id p26sm22631756wmc.24.2020.01.20.08.30.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jan 2020 08:31:00 -0800 (PST) From: Bryan O'Donoghue To: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, gregkh@linuxfoundation.org, jackp@codeaurora.org, balbi@kernel.org, bjorn.andersson@linaro.org Cc: linux-kernel@vger.kernel.org, Bryan O'Donoghue , John Stultz , Lee Jones , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Yu Chen , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , devicetree@vger.kernel.org Subject: [PATCH v2 11/19] usb: dwc3: Add support for usb-conn-gpio connectors Date: Mon, 20 Jan 2020 16:31:08 +0000 Message-Id: <20200120163116.1197682-12-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200120163116.1197682-1-bryan.odonoghue@linaro.org> References: <20200120163116.1197682-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This patch adds the ability to probe and enumerate a connector based on usb-conn-gpio. A device node label gpio_usb_connector is used to identify a usb-conn-gpio as a child of the USB interface. You would use usb-conn-gpio when a regulator in your system provides VBUS directly to the connector instead of supplying via the USB PHY. The parent device must have the "usb-role-switch" property, so that when the usb-conn-gpio driver calls usb_role_switch_set_role() the notification in dwc3 will run and the block registers will be updated to match the state detected at the connector. Cc: John Stultz Cc: Bjorn Andersson Cc: Lee Jones Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Mark Rutland CC: ShuFan Lee Cc: Heikki Krogerus Cc: Suzuki K Poulose Cc: Chunfeng Yun Cc: Yu Chen Cc: Felipe Balbi Cc: Hans de Goede Cc: Andy Shevchenko Cc: Jun Li Cc: Valentin Schneider Cc: Jack Pham Cc: linux-usb@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: Bryan O'Donoghue --- drivers/usb/dwc3/drd.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 865341facece..c6bb7cb809d5 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "debug.h" #include "core.h" @@ -557,9 +558,32 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) dwc3_set_mode(dwc, mode); return 0; } + +static int dwc3_register_gpio_usb_connector(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np = dev->of_node, *con_np; + int ret; + + con_np = of_get_child_by_name(np, "gpio_usb_connector"); + if (!np) { + dev_dbg(dev, "no usb_connector child node specified\n"); + return 0; + } + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + dev_err(dev, "failed to register usb_connector - %d\n", ret); + return ret; + } + + return 0; +} + #else #define ROLE_SWITCH 0 #define dwc3_setup_role_switch(x) 0 +#define dwc3_register_gpio_usb_connector(x) 0 #endif int dwc3_drd_init(struct dwc3 *dwc) @@ -575,6 +599,9 @@ int dwc3_drd_init(struct dwc3 *dwc) ret = dwc3_setup_role_switch(dwc); if (ret < 0) return ret; + ret = dwc3_register_gpio_usb_connector(dwc); + if (ret < 0) + return ret; } else if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,