From patchwork Fri Feb 7 20:16:46 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: 11371161 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A5C6F924 for ; Fri, 7 Feb 2020 20:18:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 79CE724125 for ; Fri, 7 Feb 2020 20:18:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="oYju6ox5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727875AbgBGUR6 (ORCPT ); Fri, 7 Feb 2020 15:17:58 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:38152 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727589AbgBGURD (ORCPT ); Fri, 7 Feb 2020 15:17:03 -0500 Received: by mail-wm1-f65.google.com with SMTP id a9so4154854wmj.3 for ; Fri, 07 Feb 2020 12:17:02 -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=eyKIMuCGLMoUcPFx2IeRMuTzX/rGZ52BhRtQ7dzOvAo=; b=oYju6ox5qVFjDDUERZ4u66XPNVQcONll3KMw2YAQOutq6CaWqNNh+yyN4JBud/Ue8n TGT7mbrsg/DNj0+FhvWF8EQKp4JZbrznq+pggVIaJ1KLl8x1J8LgsYHmI3mWWVNitQbt i3IY/uRZQRUrv8g1F7Dnug7s78Sl1YwlOFn10YuGDCd2kMTSCZOJTD8+zEAmd+jGCj/r WChqpjBsSOPwtDLOmvfvnc7eKm/P+QZig01AJ351G30tkBqQINKvah82F8Png/4WMBu3 ztR8BwT+xu9NMF5A/5pheBuIIKSO/f5QKxao+yUxGVmJuiinLmRzLRoeRtdTiuDRuwEf QQQg== 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=eyKIMuCGLMoUcPFx2IeRMuTzX/rGZ52BhRtQ7dzOvAo=; b=J4hl92VYhQgJbQe9n96j4kE26FEv/tyxR4OqKahIoHcFMRu8M+v/Cs6JuykHudLdos YParURvX3WE2S/2B98XjO4PgJ2tOuNDxoBTzhbE9wAYY5xUZ1Oz8nh6rombStorjkFge E6p1lgV81PQSJixmBjUI0UbUo+m5lpF8kyvdSEruO+uVnOHchuKdNP/OeIMCMWXlxSwr g460LtKuLlN9OFUuByCcqANateOegPWI69f9s+RypNJlbxI1uZq0jEvDthCwwkuCreBw 47mfi+3Fcroh3Cw4h2+P6AVi0w85ZpC3SZsPH6U67BTTiGb0U+KSkb+5Ml/aN/oQbqNK EJuQ== X-Gm-Message-State: APjAAAXzWygQugBtzMdC7zV4ZQCBa48s048fREUL4l4CRDTeOC4w2hL8 ZXrjAe9YSZe0ylJ6wnz1jKurFw== X-Google-Smtp-Source: APXvYqzr5CGE9x3NfC5QJUnWC2iI67z0hMx9rHOaRVOmDCyeXh818OabDKlpNMUxMdPPug/KC8GyBQ== X-Received: by 2002:a05:600c:2109:: with SMTP id u9mr8717wml.183.1581106621720; Fri, 07 Feb 2020 12:17:01 -0800 (PST) Received: from localhost.localdomain ([176.61.57.127]) by smtp.gmail.com with ESMTPSA id h2sm5018542wrt.45.2020.02.07.12.17.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Feb 2020 12:17:01 -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, robh@kernel.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 v5 10/18] usb: dwc3: Add support for usb-conn-gpio connectors Date: Fri, 7 Feb 2020 20:16:46 +0000 Message-Id: <20200207201654.641525-11-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200207201654.641525-1-bryan.odonoghue@linaro.org> References: <20200207201654.641525-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@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 | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index c355166793d0..c1825fd655f6 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" @@ -537,8 +538,29 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); return 0; } + +static int dwc3_register_gpio_usb_connector(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np = dev->of_node, *conn_np; + int ret = 0; + + conn_np = of_get_child_by_name(np, "connector"); + if (!conn_np) { + dev_dbg(dev, "no connector child node specified\n"); + goto done; + } + + if (of_device_is_compatible(conn_np, "gpio-usb-b-connector")) + ret = of_platform_populate(np, NULL, NULL, dev); +done: + of_node_put(conn_np); + return ret; +} + #else #define dwc3_setup_role_switch(x) 0 +#define dwc3_register_gpio_usb_connector(x) 0 #endif int dwc3_drd_init(struct dwc3 *dwc) @@ -554,6 +576,9 @@ 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,