From patchwork Fri Jun 4 21:40:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12300811 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=-14.1 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=ham 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 08127C4743C for ; Fri, 4 Jun 2021 21:41:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1A7C6138C for ; Fri, 4 Jun 2021 21:41:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229982AbhFDVmz (ORCPT ); Fri, 4 Jun 2021 17:42:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230432AbhFDVmz (ORCPT ); Fri, 4 Jun 2021 17:42:55 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B591C061787 for ; Fri, 4 Jun 2021 14:41:08 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id 11so5316340plk.12 for ; Fri, 04 Jun 2021 14:41:08 -0700 (PDT) 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=l4uLiCqQeie+puVICQ+LNUiCvUzNktMjBDpvrpDAQ+o=; b=Y44FhCSnKYKAip1EZZkBY2VVSVXeoQMjf1OtPSeIcTMx6bxzJQ706E9H0/OGNsUGnB InP+kS7RBNrTyjBG15MM2J06qlKl2wTgiG4ySAHzYH3cpiRjEY5IjRyRtk15ozs45RDa AcI29BcwBWH68WZlKvXpPzOD2fNkiooroA9S8= 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=l4uLiCqQeie+puVICQ+LNUiCvUzNktMjBDpvrpDAQ+o=; b=VWSbzx1kzyZN+zavHVZVlfN8p8D5FOww7xEmHxmHOM7HfxmnbVsYziSIrjYAAkLWo6 558wdaAnwhHUnQmau1Nf+FYiOXmotBEcNj7IBg7hWv8EJQZSzp2EW9wNvgrh40EmOKn8 C8YNd+s6ee1g6SYiPvcmPKZm29ThpwlP+IN62SsNKICeh+UAdvbFI0t3q1wvKe/C/qLT xQ6vSU1IfOuVVPsVkQ0fab19u6aTiSUrfjO/EJVJU17TSapwGmpUZuZzCG8otOvm+sO7 oOyyLeol+MNs34ZLAkDTH0Vx7xhuBIwWDkQVPru2EwUuIPc6a1ynjGmfbwdkgBzPvEeQ XW0Q== X-Gm-Message-State: AOAM531rpMSKiAZFvJqmV5Vo/rbr9noXk1tRSbojKdZuguolW6bMuX3Z eRh5P5/gMNr1f+Jkr1yPBuEjKQ== X-Google-Smtp-Source: ABdhPJyOXK/ctlvPnx2UNmkOsnU8AXIZFI8KhFytx8kW3nE7dvU2dbxBBlp62wFbJe81CHKNOnh8hw== X-Received: by 2002:a17:90a:a502:: with SMTP id a2mr18898468pjq.62.1622842867783; Fri, 04 Jun 2021 14:41:07 -0700 (PDT) Received: from localhost ([2620:15c:202:201:1cfa:4a0b:c513:8c09]) by smtp.gmail.com with UTF8SMTPSA id o7sm2957444pgs.45.2021.06.04.14.41.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Jun 2021 14:41:07 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Michal Simek , Ravi Chandra Sadineni , linux-usb@vger.kernel.org, Bastien Nocera , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , devicetree@vger.kernel.org, Peter Chen , Stephen Boyd , Douglas Anderson , Matthias Kaehlcke , Al Cooper , "Alexander A. Klimov" , Andy Gross , Bjorn Andersson , Colin Ian King , Dmitry Osipenko , Fabio Estevam , Masahiro Yamada , linux-arm-msm@vger.kernel.org Subject: [PATCH v11 0/5] USB: misc: Add onboard_usb_hub driver Date: Fri, 4 Jun 2021 14:40:56 -0700 Message-Id: <20210604214101.3363525-1-mka@chromium.org> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This series adds: - the onboard_usb_hub_driver - glue in the xhci-plat driver to create and destroy the onboard_usb_hub platform devices if needed - a device tree binding for the Realtek RTS5411 USB hub controller - device tree changes that add RTS5411 entries for the QCA SC7180 based boards trogdor and lazor - a couple of stubs for platform device functions to avoid unresolved symbols with certain kernel configs 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. Changes in v11: - support multiple onboard hubs connected to the same parent - don't include ‘onboard_hub.h’ from the onboard hub driver Changes in v10: - always use of_is_onboard_usb_hub() stub unless ONBOARD_USB_HUB=y/m - keep 'regulator-boot-on' property for pp3300_hub Changes in v9: - added dependency on ONBOARD_USB_HUB (or !!ONBOARD_USB_HUB) to USB_PLATFORM_XHCI Changes in v7: - updated DT binding - series rebased on qcom/arm64-for-5.13 Changes in v6: - updated summary Changes in v5: - cover letter added Matthias Kaehlcke (5): dt-bindings: usb: Add binding for Realtek RTS5411 hub controller USB: misc: Add onboard_usb_hub driver of/platform: Add stubs for of_platform_device_create/destroy() usb: host: xhci-plat: Create platform device for onboard hubs in probe() arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub .../sysfs-bus-platform-onboard-usb-hub | 8 + .../bindings/usb/realtek,rts5411.yaml | 62 +++ MAINTAINERS | 7 + .../boot/dts/qcom/sc7180-trogdor-lazor-r0.dts | 19 +- .../boot/dts/qcom/sc7180-trogdor-lazor-r1.dts | 12 +- .../arm64/boot/dts/qcom/sc7180-trogdor-r1.dts | 19 +- arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 19 +- drivers/usb/host/Kconfig | 1 + drivers/usb/host/xhci-plat.c | 6 + drivers/usb/host/xhci.h | 2 + drivers/usb/misc/Kconfig | 17 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/onboard_usb_hub.c | 496 ++++++++++++++++++ include/linux/of_platform.h | 22 +- include/linux/usb/onboard_hub.h | 18 + 15 files changed, 675 insertions(+), 34 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub create mode 100644 Documentation/devicetree/bindings/usb/realtek,rts5411.yaml create mode 100644 drivers/usb/misc/onboard_usb_hub.c create mode 100644 include/linux/usb/onboard_hub.h