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=-14.5 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 59C85C4320E for ; Tue, 27 Jul 2021 00:41:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3DFC760E78 for ; Tue, 27 Jul 2021 00:41:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234469AbhG0AA6 (ORCPT ); Mon, 26 Jul 2021 20:00:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234359AbhG0AA4 (ORCPT ); Mon, 26 Jul 2021 20:00:56 -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 82926C061760 for ; Mon, 26 Jul 2021 17:41:23 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id c16so8182152plh.7 for ; Mon, 26 Jul 2021 17:41:23 -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=0jFCOGwVLro74l3AmLxyBCChPeG0hsgLLLHqSxGYC8Q=; b=j7ylPVAQw+lTn6ziL/mjQqe0zt1970y8zj8Ky2J8/U3Mm/6MbgYAdeab5b1tgow/Z9 PutsnDEE+8JERJOP5SZv6R6zO41Yo5ubUF/51vLXDtWVpHOVBccGkkfte7LEi6V3VPgo qVR2ddrgwtyysqZpJ46+xhYYsyOC4HPRvPDxE= 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=0jFCOGwVLro74l3AmLxyBCChPeG0hsgLLLHqSxGYC8Q=; b=KvH/DE67+3ywQBE74EQ94S3wWTbAevp0MG3lepW593U9oy/ZL0e+WFysU75tm9xgfr gxkr1CMHwZL+jr5JdgYEUlwkkLDisB/SYz798jewAz+LKCYK/pLUAh7rjH360KQlU2ks XRbwiYiubSzcczehvlBU8VoiJh0vD9cLKqGhZs9uKMuXGZ1wtuAtDmZH/dM0xRiA/G5I 9cd+ReToIQUwhBZf1JZ54ZjpO/SPzdBlXgIzNdy2j/jjC66DqMX/B7Gn1UqDmpybxDmU mitU9KtUDrpJQAc13G5nM2NNB2NEZ2VyyyHKPz1yWmRTHGNr7fvxcNjWSvUPxuigi+Gw 4OTQ== X-Gm-Message-State: AOAM533BfCuwcXwzdqlHWK9vNJJ2vlmCjW/CV3bW4ZBRIzMAt9cbZxlo 3SqiXDTnCm7YH64yf5bgvB1tWA== X-Google-Smtp-Source: ABdhPJxSujWkxvebgTf191AqcD9sTAO6N5nM6PwU/6B5IuN0Uwt2UPomKNnQaijzM9rdXKMVE7fbyA== X-Received: by 2002:a17:90b:4ac4:: with SMTP id mh4mr1597666pjb.48.1627346483049; Mon, 26 Jul 2021 17:41:23 -0700 (PDT) Received: from localhost ([2620:15c:202:201:9c3d:270c:6be9:9c33]) by smtp.gmail.com with UTF8SMTPSA id y8sm1278565pfe.162.2021.07.26.17.41.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Jul 2021 17:41:22 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman , Felipe Balbi Cc: Bastien Nocera , Peter Chen , devicetree@vger.kernel.org, Michal Simek , linux-kernel@vger.kernel.org, Douglas Anderson , Krzysztof Kozlowski , linux-usb@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , Matthias Kaehlcke , Al Cooper , Andrey Zhizhikin , Andy Gross , Aswath Govindraju , Bjorn Andersson , Catalin Marinas , Dmitry Baryshkov , Dmitry Osipenko , Enric Balletbo i Serra , Fabio Estevam , =?UTF-8?q?Guido=20G=C3=BCnther?= , Jagan Teki , Nishanth Menon , Pawel Laszczak , Roger Quadros , Shawn Guo , Vinod Koul , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v15 0/6] usb: misc: Add onboard_usb_hub driver Date: Mon, 26 Jul 2021 17:41:12 -0700 Message-Id: <20210727004118.2583774-1-mka@chromium.org> X-Mailer: git-send-email 2.32.0.432.gabb21c7263-goog MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 v15: - adjusted dependencies of USB_DWC3_CORE to make sure it can only be enabled when at least one of USB_DWC3_HOST, USB_DWC3_GADGET or USB_DWC3_DUAL_ROLE is selectable Changes in v14: - rebased on top of v5.14-rc1 - dropped DT binding patch which landed in v5.13 Changes in v13: - added patch "usb: Specify dependency on USB_XHCI_PLATFORM with 'depends on'" to the series to avoid Kconfig conflicts - added patch "arm64: defconfig: Explicitly enable USB_XHCI_PLATFORM" to the series to keep effective defconfig unchanged Changes in v12: - onboard_hub driver: use IS_ENABLED(CONFIG_USB_ONBOARD_HUB_MODULE) in onboard_hub.h to also check for the driver built as module - onboard_hub_driver: include onboard_hub.h again to make sure there are prototype declarations for the public functions 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 (6): usb: misc: Add onboard_usb_hub driver of/platform: Add stubs for of_platform_device_create/destroy() arm64: defconfig: Explicitly enable USB_XHCI_PLATFORM usb: Specify dependencies on USB_XHCI_PLATFORM with 'depends on' 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 + 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 +- arch/arm64/configs/defconfig | 1 + drivers/usb/cdns3/Kconfig | 2 +- drivers/usb/dwc3/Kconfig | 5 +- drivers/usb/host/Kconfig | 5 +- 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 | 497 ++++++++++++++++++ include/linux/of_platform.h | 22 +- include/linux/usb/onboard_hub.h | 18 + 17 files changed, 621 insertions(+), 39 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub create mode 100644 drivers/usb/misc/onboard_usb_hub.c create mode 100644 include/linux/usb/onboard_hub.h -- 2.32.0.432.gabb21c7263-goog