From mboxrd@z Thu Jan 1 00:00:00 1970 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=-14.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,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 EC9C5C433E0 for ; Wed, 10 Feb 2021 17:11:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFF9064DD4 for ; Wed, 10 Feb 2021 17:11:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232065AbhBJRLh (ORCPT ); Wed, 10 Feb 2021 12:11:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232087AbhBJRLa (ORCPT ); Wed, 10 Feb 2021 12:11:30 -0500 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91004C061788 for ; Wed, 10 Feb 2021 09:10:48 -0800 (PST) Received: by mail-pg1-x52f.google.com with SMTP id t11so1627170pgu.8 for ; Wed, 10 Feb 2021 09:10:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pJV+MEYRICjZ5HpV10ncANYQowHTJOaKXZIikrVEzcc=; b=eBjO8Mp+e0jogy5KAtdpVmCbQT7+E94H38P+/sET318KCwdSa9MYraoeqWiUIUWAdo WTCreNp5joOqR7uA7CDTSDMPkQ7mrJqdJBA6WblNHhppN17B6HCH2cExTi3vUWxxkfJu MPSw+Kk42luJ2FRguWwMopBsZLeKo4/21UTFI= 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:mime-version :content-transfer-encoding; bh=pJV+MEYRICjZ5HpV10ncANYQowHTJOaKXZIikrVEzcc=; b=JMUyEb3K7vSfsf7f0QW+Nq2d252cCIJ1Q8cp7f0DdU4JLzpL9NHrUD8ebQ71oGKNPo a4mqla9USXWfe7xusS7YM+RzPMCsPj7OXp4LXatEn8osT0HaCUNn2D6dkhQ/RToXxdJc fj+GGz5DKNIUAhs3dgzY6/Dbf+VA8x+mSQE3EnbCWAJWAIxsHhl3lhqaFZoYU2XSCcBi XfEiOWb7t4eJUQ5vSW8cZfhPQUYjGInrQENwrL3uB3WHXI4gLMaV0bceRwcnG9G/EUTB dykkXtrYGDsq9Mv6XS7buzbUb/62TzKmsMuE1deKRLJyJXfmMAR6e/MQiqr3qyLJKAmo 3PUg== X-Gm-Message-State: AOAM531JVm4EnBCwSvjX8xjyJyqHfcahFMZTfWGsZQDr9Kfbb4jHTwVN JJqoC6iRfUpaRaS8WgBFyIBYYg== X-Google-Smtp-Source: ABdhPJwUpLOFCuA7nZkRLnyPywPsm+Uy2ope7BH7lfMNFNhIZv7LbA3078Lu/PZU9JDAuQw2JUj02g== X-Received: by 2002:a63:fa0b:: with SMTP id y11mr4048388pgh.35.1612977047929; Wed, 10 Feb 2021 09:10:47 -0800 (PST) Received: from localhost ([2620:15c:202:1:d8e6:826a:fc50:2158]) by smtp.gmail.com with UTF8SMTPSA id m25sm2971739pff.77.2021.02.10.09.10.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Feb 2021 09:10:46 -0800 (PST) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Rob Herring , Frank Rowand Cc: devicetree@vger.kernel.org, Peter Chen , Stephen Boyd , Alan Stern , Ravi Chandra Sadineni , Bastien Nocera , linux-kernel@vger.kernel.org, Douglas Anderson , linux-usb@vger.kernel.org, Krzysztof Kozlowski , Matthias Kaehlcke , Al Cooper , "Alexander A. Klimov" , Andy Gross , Bjorn Andersson , Masahiro Yamada , Mathias Nyman , linux-arm-msm@vger.kernel.org Subject: [PATCH v5 0/4] USB: misc: Add onboard_usb_hub driver Date: Wed, 10 Feb 2021 09:10:35 -0800 Message-Id: <20210210171040.684659-1-mka@chromium.org> X-Mailer: git-send-email 2.30.0.478.g8a0d178c01-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This series adds the onboard_usb_hub_driver, the corresponding device tree bindings and creation of onboard_usb_hub platform in the xhci-plat driver during probe(). The main issue the driver addresses is that a USB hub needs to be powered before it can be discovered. For discrete onboard hubs (an example for such a hub is the Realtek RTS5411) this is often solved by supplying the hub with an 'always-on' regulator, which is kind of a hack. Some onboard hubs may require further initialization steps, like changing the state of a GPIO or enabling a clock, which requires even more hacks. This driver creates a platform device representing the hub which performs the necessary initialization. Currently it only supports switching on a single regulator, support for multiple regulators or other actions can be added as needed. Different initialization sequences can be supported based on the compatible string. Besides performing the initialization the driver can be configured to power the hub off during system suspend. This can help to extend battery life on battery powered devices which have no requirements to keep the hub powered during suspend. The driver can also be configured to leave the hub powered when a wakeup capable USB device is connected when suspending, and power it off otherwise. (no changes since v1) Matthias Kaehlcke (4): dt-bindings: usb: Add binding for discrete onboard USB hubs USB: misc: Add onboard_usb_hub driver usb: host: xhci-plat: Create platform device for onboard hubs in probe() arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub .../bindings/usb/onboard_usb_hub.yaml | 49 +++ MAINTAINERS | 7 + .../boot/dts/qcom/sc7180-trogdor-lazor-r0.dts | 15 +- .../boot/dts/qcom/sc7180-trogdor-lazor-r1.dts | 11 +- .../arm64/boot/dts/qcom/sc7180-trogdor-r1.dts | 15 +- arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 18 +- drivers/usb/host/xhci-plat.c | 16 + drivers/usb/misc/Kconfig | 18 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/onboard_usb_hub.c | 409 ++++++++++++++++++ include/linux/usb/hcd.h | 2 + include/linux/usb/onboard_hub.h | 15 + 12 files changed, 542 insertions(+), 34 deletions(-) create mode 100644 Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml create mode 100644 drivers/usb/misc/onboard_usb_hub.c create mode 100644 include/linux/usb/onboard_hub.h -- 2.30.0.478.g8a0d178c01-goog