From patchwork Sat Aug 19 03:17:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 13358471 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30FDEEE49BD for ; Sat, 19 Aug 2023 03:18:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244994AbjHSDSD (ORCPT ); Fri, 18 Aug 2023 23:18:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244855AbjHSDRm (ORCPT ); Fri, 18 Aug 2023 23:17:42 -0400 Received: from mail-oo1-xc33.google.com (mail-oo1-xc33.google.com [IPv6:2607:f8b0:4864:20::c33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92FEA421A for ; Fri, 18 Aug 2023 20:17:40 -0700 (PDT) Received: by mail-oo1-xc33.google.com with SMTP id 006d021491bc7-56dd683e9b3so942386eaf.3 for ; Fri, 18 Aug 2023 20:17:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1692415060; x=1693019860; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=EK4lc13hsQBieya89oWIFB0P2uDWj3MviewwKrAjxRw=; b=gH2yIICE5JiUkpTUs4CSGRbbH5ZMRMUR0GayY2DiaZAwbPuo7IBZOO19ZfmjRnWQow WSvXRhBjmEJwhIHLbz3MLbKMue1Y73dVgaSmND3FeGzInC45hRXk62nvTmyUXvINW+kQ IFLuZmM/4525WH4XAPKBdcSojq1g5646XK9kggBY2WIbpV0d59N2WSp/D0E+/wW8FsNP 1S4HzvMPpFtP/9BIcu927YlH+iXdQoDB/j3X5trswIRH/NUJ/8MfhXzEu5KG1vIJLGUP zm8YYj1dnbrdDwzfsSGa59JPhmz07dFWmaRDzDavUZAQ8FOTt7eAQS9ZhSNAzeFjj1uu Qu5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692415060; x=1693019860; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=EK4lc13hsQBieya89oWIFB0P2uDWj3MviewwKrAjxRw=; b=dIJx9QvUz4rqF+FBg1ADCF3K0gu/RB2IPyDwOodVsVWlLRCoBAxtQSGg075zpSVmMi vP3y2PLVwvlIgGydb8tGc3Cvs4WzYAZCUr9+Hrun8Svz/CcsAwlu2PQzAMVXJ8rLVK9i 1cVJ7mGy8eeC8dOZBUdQPQqKvSHz8UZH5FPIyAgHq9t9YPwGeoxSFAethiJBfJPQG2Vi k14g2o5lCtlHGb5eofAFY/otIMHKTYrxH3FKeogv1JTHEmMisiAq0rW0QeUFZZHnt9kO 2JiuqiroddQ6Oy+5tplfdgJlGHf9T9UZ/sgaFSYBzocc7o3mTTjvqTjNmkhBhUq0uSVy 23Aw== X-Gm-Message-State: AOJu0Yywvh9aCRbI9PN3oWrghP6iyYC8ZypIUx+vYUwd8Nya8pajP+Hv BXh4syS/ZClXwZ+ckt4jNlLhOg== X-Google-Smtp-Source: AGHT+IEQ3BwqLE3HDnHpyCiEwIbHJOPXfPkwHfhNQFFL1+Q07JcVrXASX49TluX1i2SH3iY6U9p5kw== X-Received: by 2002:a05:6870:1d0:b0:1bb:c946:b80e with SMTP id n16-20020a05687001d000b001bbc946b80emr1102346oad.28.1692415059832; Fri, 18 Aug 2023 20:17:39 -0700 (PDT) Received: from localhost ([136.49.140.41]) by smtp.gmail.com with ESMTPSA id q2-20020a9d7c82000000b006b89dafb721sm1424375otn.78.2023.08.18.20.17.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Aug 2023 20:17:39 -0700 (PDT) From: Sam Protsenko To: Krzysztof Kozlowski , Rob Herring , Thinh Nguyen Cc: JaeHun Jung , Marek Szyprowski , Sylwester Nawrocki , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Greg Kroah-Hartman , Alim Akhtar , Marc Kleine-Budde , Heiko Stuebner , linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH 8/8] arm64: dts: exynos: Enable USB support on E850-96 board Date: Fri, 18 Aug 2023 22:17:31 -0500 Message-Id: <20230819031731.22618-9-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230819031731.22618-1-semen.protsenko@linaro.org> References: <20230819031731.22618-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The E850-96 board has a micro-USB socket and two USB 2.0 host sockets. The USB role (host or peripheral) is selected automatically depending on micro-USB cable attachment state: - micro-USB cable is attached: USB device role - micro-USB cable is detached: USB host role USB can't act simultaneously as a device and a host, because Exynos850 SoC has only one USB controller and there are no external USB controllers on the E850-96 board. So the USB switch chip (specifically TS3USB221A) connects SoC USB lines either to micro-USB connector or to USB hub chip (LAN9514), w.r.t. micro-USB cable attachment state. When USB works in the host role, Ethernet capability becomes available too, as LAN9514 chip (providing USB hub) also enables Ethernet PHY and Ethernet MAC. Dynamic role switching is done in gpio-usb-b-connector, using current micro-USB VBUS line level as a trigger: - VBUS=high: SoC USB lines are wired to micro-USB socket - VBUS=low: SoC USB lines are wired to USB hub chip In order to make USB host functional when the board is booted with micro-USB cable disconnected, role-switch-default-mode = "host" is used. One can look at E850-96 board schematics [1] to figure out how exactly all related USB hardware connections and lines reflect into corresponding device tree definitions. As PMIC regulators are not implemented yet, we rely on USB LDOs being already enabled in the bootloader, and a dummy regulator is provided to "usbdrd" vdd nodes for now. [1] https://www.96boards.org/documentation/consumer/e850-96b/hardware-docs/ Signed-off-by: Sam Protsenko --- .../boot/dts/exynos/exynos850-e850-96.dts | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts index 6ed38912507f..8d733361ef82 100644 --- a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts @@ -29,6 +29,22 @@ chosen { stdout-path = &serial_0; }; + connector { + compatible = "gpio-usb-b-connector", "usb-b-connector"; + label = "micro-USB"; + type = "micro"; + vbus-supply = <®_usb_host_vbus>; + id-gpios = <&gpa0 0 GPIO_ACTIVE_LOW>; + pinctrl-names = "default"; + pinctrl-0 = <µ_usb_det_pins>; + + port { + usb_dr_connector: endpoint { + remote-endpoint = <&usb1_drd_sw>; + }; + }; + }; + /* * RAM: 4 GiB (eMCP): * - 2 GiB at 0x80000000 @@ -111,6 +127,20 @@ bt_active_led: led-5 { }; }; + /* TODO: Remove this once PMIC is implemented */ + reg_dummy: regulator-0 { + compatible = "regulator-fixed"; + regulator-name = "dummy_reg"; + }; + + reg_usb_host_vbus: regulator-1 { + compatible = "regulator-fixed"; + regulator-name = "usb_host_vbus"; + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + gpio = <&gpa3 5 GPIO_ACTIVE_LOW>; + }; + /* * RTC clock (XrtcXTI); external, must be 32.768 kHz. * @@ -172,6 +202,12 @@ key_volup_pins: key-volup-pins { samsung,pin-pud = ; samsung,pin-drv = ; }; + + micro_usb_det_pins: micro-usb-det-pins { + samsung,pins = "gpa0-0"; + samsung,pin-function = ; + samsung,pin-pud = ; + }; }; &rtc { @@ -186,6 +222,28 @@ &serial_0 { pinctrl-0 = <&uart1_pins>; }; +&usbdrd { + status = "okay"; + vdd10-supply = <®_dummy>; + vdd33-supply = <®_dummy>; +}; + +&usbdrd_dwc3 { + dr_mode = "otg"; + usb-role-switch; + role-switch-default-mode = "host"; + + port { + usb1_drd_sw: endpoint { + remote-endpoint = <&usb_dr_connector>; + }; + }; +}; + +&usbdrd_phy { + status = "okay"; +}; + &usi_uart { samsung,clkreq-on; /* needed for UART mode */ status = "okay";