From patchwork Tue May 11 22:52:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 436090 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=-14.5 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 306A4C43461 for ; Tue, 11 May 2021 22:52:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C7E761260 for ; Tue, 11 May 2021 22:52:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229996AbhEKWxg (ORCPT ); Tue, 11 May 2021 18:53:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230011AbhEKWxe (ORCPT ); Tue, 11 May 2021 18:53:34 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CB64C061574 for ; Tue, 11 May 2021 15:52:27 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id gc22-20020a17090b3116b02901558435aec1so2229868pjb.4 for ; Tue, 11 May 2021 15:52:27 -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=MoNMrqKHpNoIlrWmHHElwi2Zgk61Xn7OFK++3WUoOmc=; b=IO3+l5+HYPtRVdCZtd678/nzTEnB8gsZcFj/BpOZJF3dDCfBW0m9s3KfpSOP0c4vsN AKWL8yrs860HI/07jGm3jGQjxPOoF29ld0nhO0rA/LkBTpgJ5lGBGlquqeOpu32S2D1g MF602Xh8wuECIHCyJIhcxkt++RNYUSCz4Kaf0= 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=MoNMrqKHpNoIlrWmHHElwi2Zgk61Xn7OFK++3WUoOmc=; b=m/MNl/ipqzaTwi2TR3rbxyD8mA7hhYk0c1cVP0JJ7AWzocvTCY9Pwn+ACZ6TeLnZfi rlfyRKryaC6Sc84YjjX1aZbCtI/WSE45MFK/R+WyExQw6N1TOO7efnn5Du5dvWKz+b0W WfkUrwNeiihLtRdVS8V49fa/+mXEve4ch+tdVnh+Er9cJ9vbLRBEd1R4XsKaNcMW5Iy/ YcEfkyM51pFk/egVBR6JcBePggS0H5+xrrW5O40K2MJyXQFMQNQxrWUVn4ru1BINivoF 9Xx7KCxcIIyy9EYxNBrrZdH6sKJdC6C2qgpzC81MNP8+44yeVWdpCNYAub47ecI0RJyY VxfQ== X-Gm-Message-State: AOAM533oUfNzj/0DWtMZJNMN4Ri/ox25R+w49CcCgKB/JxjJxwxi+BXc uJuSwhSIULBAmNUvPDbojW/dNw== X-Google-Smtp-Source: ABdhPJyJkpvYFQl8dIjuffCEsX6wfwXKpmoPjao12wYgsRO0/c9PPHShcVturNVIs01FZwIuhkQ4vg== X-Received: by 2002:a17:90b:3b4b:: with SMTP id ot11mr34824045pjb.189.1620773547184; Tue, 11 May 2021 15:52:27 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id v22sm14303739pff.105.2021.05.11.15.52.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:26 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand Cc: Michal Simek , devicetree@vger.kernel.org, Douglas Anderson , linux-usb@vger.kernel.org, Peter Chen , linux-kernel@vger.kernel.org, Stephen Boyd , Ravi Chandra Sadineni , Krzysztof Kozlowski , Bastien Nocera , Matthias Kaehlcke , Al Cooper , "Alexander A. Klimov" , Andy Gross , Bjorn Andersson , Christian Lamparter , Colin Ian King , Dmitry Osipenko , Fabio Estevam , Masahiro Yamada , Mathias Nyman , Vinod Koul , linux-arm-msm@vger.kernel.org Subject: [PATCH v10 0/5] USB: misc: Add onboard_usb_hub driver Date: Tue, 11 May 2021 15:52:18 -0700 Message-Id: <20210511225223.550762-1-mka@chromium.org> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This series adds: - the onboard_usb_hub_driver - glue in the xhci-plat driver to create the onboard_usb_hub platform device 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 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 | 11 +- .../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 | 16 + drivers/usb/misc/Kconfig | 17 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/onboard_usb_hub.c | 415 ++++++++++++++++++ include/linux/of_platform.h | 22 +- include/linux/usb/hcd.h | 2 + include/linux/usb/onboard_hub.h | 15 + 15 files changed, 600 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