From patchwork Wed Mar 11 19:14:59 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: 11432633 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 0C39092A for ; Wed, 11 Mar 2020 19:16:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8171A2074D for ; Wed, 11 Mar 2020 19:16:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="DTDyI5/K" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731220AbgCKTQI (ORCPT ); Wed, 11 Mar 2020 15:16:08 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:39921 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731197AbgCKTO5 (ORCPT ); Wed, 11 Mar 2020 15:14:57 -0400 Received: by mail-wm1-f68.google.com with SMTP id f7so3393770wml.4 for ; Wed, 11 Mar 2020 12:14:56 -0700 (PDT) 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=6uJCk+HQYgUH7qWgjKQGPX8ag8V+DQkqOmcR60lBEBw=; b=DTDyI5/KA68gkxBsjUHDiz301KxXFfP/qTr0ceS5thjlAGXbEyqOanrRA+YnGSI5hv bDIQ2l44yQYfXt+dxgW+hmAl6350SbPvH+gNvQhOfblA84fbeVEGoTnaGSEzCMhwmlYF iDa4Xk9oOmei64zlufXXpz+UKf8O6SZ7+FRGVvgwX5+WT39VMu6zpYtMPxjbWmmeJM26 eAM6qIAF32yIiiJG1MpfXFPFuceift9DquCEFlsWREJbPDQP/HIaMcz7IpV/1TMhox1e LNtcNfggHIs4Fx0NHBMIEQ1WkiywMUUVwdEZNckbS22sDwVdq1faXRc3k/4ZrCirXxxJ M87A== 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=6uJCk+HQYgUH7qWgjKQGPX8ag8V+DQkqOmcR60lBEBw=; b=q2gq/fJUfKo25Mj7ocpr7YxQ7xlmaFl4rv063Qdoufm2R5mlxO6+EJiSHy7g0Bb8Wu 5NTa+ub/9M2PRJTw47W2YZzb5K3FBmQAbw0g+hYwB76qklS8o7sgidObduehFr5cz7Fn dpdnByVdEZtKZz9HtkSOSU9sg8t9p+W6HtmE3JLT/K5EU1RMnlbGxjwSY0uUhmguaePA PaydKTY5zEUqivNm7oKCLKR+wmoF5BFVp7E4uEqC+bujOvWDga2WAxsYQRN75j+t/PJD BhJGepoweoI8Syb3mnc68LYoMLce9a5Gx5qwvIAZOqWjhEPb+a/FBojcp0fuzQcYCp5l vbhg== X-Gm-Message-State: ANhLgQ12DWr8YJV7XkMTd/hiNFyQuD5iYgvQ0KcOn9tPp6wVp0C9Ed8R cJZKOydXGbeDCRXsZGMtQsXW1yOP2mY= X-Google-Smtp-Source: ADFU+vtBiBpemFTC15uMfOPHxzMFb1eqF6p+FRAbAGHExH6FcGWz6NITcSVHBIGYMbMjn3vDHo01bw== X-Received: by 2002:a1c:25c5:: with SMTP id l188mr218306wml.105.1583954094777; Wed, 11 Mar 2020 12:14:54 -0700 (PDT) Received: from localhost.localdomain ([176.61.57.127]) by smtp.gmail.com with ESMTPSA id n24sm32958496wra.61.2020.03.11.12.14.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Mar 2020 12:14:54 -0700 (PDT) From: Bryan O'Donoghue To: balbi@kernel.org, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org, jackp@codeaurora.org, robh@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 5/7] usb: dwc3: Add support for usb-conn-gpio connectors Date: Wed, 11 Mar 2020 19:14:59 +0000 Message-Id: <20200311191501.8165-6-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200311191501.8165-1-bryan.odonoghue@linaro.org> References: <20200311191501.8165-1-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. 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 Tested-by: Bjorn Andersson 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 ba0f6cdc4c71..2705871ec95e 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" @@ -539,9 +540,30 @@ 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 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) @@ -557,6 +579,9 @@ 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,