From patchwork Tue May 11 22:52:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12252291 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 8F1FCC43470 for ; Tue, 11 May 2021 22:52:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 75DF861421 for ; Tue, 11 May 2021 22:52:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230018AbhEKWxi (ORCPT ); Tue, 11 May 2021 18:53:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230126AbhEKWxg (ORCPT ); Tue, 11 May 2021 18:53:36 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7E23C06174A for ; Tue, 11 May 2021 15:52:29 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id c21so16812061pgg.3 for ; Tue, 11 May 2021 15:52:29 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=nPfjNGu0bWmZPxek0tP9ZZksfu5jEL2EIBrcRX1glfg=; b=jI7LM9aVM57XPnXPuJRJkxCqBEh6mrB7droxTox8SAa5ztFsAOv+AVq6skwDMupyfP otqJAg85fAbfowID2PIA+rZ9cccY1SPm2Ce+nBoiqk4Kje74zAqoLIpCN+u4SXJjxY4/ kc6sEXFmF8M9/OF7sxXjvUcv00CRNH/qUQ3Jg= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=nPfjNGu0bWmZPxek0tP9ZZksfu5jEL2EIBrcRX1glfg=; b=PIRcdc9eieP1FlbgwfpZOCZKhDffhJd/xW1X8NO0d5/werQwmBGGyYGHMJnmiCc38X pK8AXyf2yexm3s27uQp8USnMpaXsI4EsnaAH/npXKNCgqMgPAeyvVQbcg9M3ZaQPdKO2 c2tdvZQBKFUKLqH5VvD0VQVmGOhW/SyZ/n8pUSlFlfPozM1bje9WZU2hZaS7f3Y8jpQk v03LJqKr8GjGtKd55tNJbpnnxS0ARdF08n8yLk7Dv9hpyownwSEzO2TWM4FP8FqC3oER GwSLMXZjszE4yVdNu0yn8H9ZJ+v0AgARY21fBK0gDT0Cp4Y2zMxyEvXZ9bBM6W4t1p+7 UOsA== X-Gm-Message-State: AOAM533ce1UZG7VBhf+hKTYr6dXE/Jx9tp5PYVsbCEjytvYlo8xMtMNH 4ESGdWmQX0DRe5u0UwXpQ8wTFvfq8G1f3g== X-Google-Smtp-Source: ABdhPJy4yWZ/DcWMdmWwZpF8qxLQuvC1hUn0XzngT8Xx4R8juzOn0k4q8IijTPovE+rhsFXv+j+DFA== X-Received: by 2002:a05:6a00:1ac6:b029:2ae:bde3:621c with SMTP id f6-20020a056a001ac6b02902aebde3621cmr22097698pfv.80.1620773549330; Tue, 11 May 2021 15:52:29 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id c24sm14198088pfi.32.2021.05.11.15.52.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:29 -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 , Rob Herring Subject: [PATCH v10 1/5] dt-bindings: usb: Add binding for Realtek RTS5411 hub controller Date: Tue, 11 May 2021 15:52:19 -0700 Message-Id: <20210511155152.v10.1.I248292623d3d0f6a4f0c5bc58478ca3c0062b49a@changeid> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210511225223.550762-1-mka@chromium.org> References: <20210511225223.550762-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The Realtek RTS5411 is a USB 3.0 hub controller with 4 ports. This initial version of the binding only describes USB related aspects of the RTS5411, it does not cover the option of connecting the controller as an i2c slave. Signed-off-by: Matthias Kaehlcke Reviewed-by: Rob Herring --- Changes in v10: - none Changes in v9: - added Rob's 'Reviewed-by' tag Changes in v8: - added entry for 'reg' - marked 'companion-hub' as required - changed node name of USB controller to 'usb' Changes in v7: - added type ref for 'companion-hub' property Changes in v6: - Realtek binding instead of generic onboard_usb_hub - added 'companion-hub' property - added reference to 'usb-device.yaml' - 'fixed' indentation of compatible entries to keep yamllint happy - added 'additionalProperties' entry - updated commit message Changes in v5: - updated 'title' - only use standard USB compatible strings - deleted 'usb_hub' node - renamed 'usb_controller' node to 'usb-controller' - removed labels from USB nodes - added 'vdd-supply' to USB nodes Changes in v4: - none Changes in v3: - updated commit message - removed recursive reference to $self - adjusted 'compatible' definition to support multiple entries - changed USB controller phandle to be a node Changes in v2: - removed 'wakeup-source' and 'power-off-in-suspend' properties - consistently use spaces for indentation in example .../bindings/usb/realtek,rts5411.yaml | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/realtek,rts5411.yaml diff --git a/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml new file mode 100644 index 000000000000..04ee255eb4f0 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/realtek,rts5411.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Binding for the Realtek RTS5411 USB 3.0 hub controller + +maintainers: + - Matthias Kaehlcke + +allOf: + - $ref: usb-device.yaml# + +properties: + compatible: + items: + - enum: + - usbbda,5411 + - usbbda,411 + + reg: true + + vdd-supply: + description: + phandle to the regulator that provides power to the hub. + + companion-hub: + $ref: '/schemas/types.yaml#/definitions/phandle' + description: + phandle to the companion hub on the controller. + +required: + - companion-hub + - compatible + - reg + +additionalProperties: false + +examples: + - | + usb { + dr_mode = "host"; + #address-cells = <1>; + #size-cells = <0>; + + /* 2.0 hub on port 1 */ + hub_2_0: hub@1 { + compatible = "usbbda,5411"; + reg = <1>; + vdd-supply = <&pp3300_hub>; + companion-hub = <&hub_3_0>; + }; + + /* 3.0 hub on port 2 */ + hub_3_0: hub@2 { + compatible = "usbbda,411"; + reg = <2>; + vdd-supply = <&pp3300_hub>; + companion-hub = <&hub_2_0>; + }; + }; From patchwork Tue May 11 22:52:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12252295 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=-24.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 69D79C43460 for ; Tue, 11 May 2021 22:52:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CEF461260 for ; Tue, 11 May 2021 22:52:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230168AbhEKWxm (ORCPT ); Tue, 11 May 2021 18:53:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230167AbhEKWxk (ORCPT ); Tue, 11 May 2021 18:53:40 -0400 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22AFEC061763 for ; Tue, 11 May 2021 15:52:32 -0700 (PDT) Received: by mail-pl1-x631.google.com with SMTP id n16so11548911plf.7 for ; Tue, 11 May 2021 15:52:32 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=epcI1/ipHi7F2p3CB+9/iRMvr3HxQg7qmMcr0/9jxcg=; b=WO2GDUPnVN5UD4KgP9B5FEfGT0lP2AbCQ3SOXDzg1/OzGV/xyq0kqXGyL44fv7MB+w Ah3bOJJuH2r0BTPJHKiDN3ogUM0M7la18NJqLLCDInzSIWUiF86bVEGULm/q+fCx7PbD 9SdYBblcmOKra8eaSgE/2XBBDNdkjHz2uWja4= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=epcI1/ipHi7F2p3CB+9/iRMvr3HxQg7qmMcr0/9jxcg=; b=uPYvyhzYjFCpQ3Pcdvx/wTl7emO0ftxbUsuSb22pBqibuO3xB3sMRbj+2OxlhziMEy /FsocY6LahMvlG50BP6hkdMl2KW+8or+W65ALQlvXdlm09JkbvSUiNmjhsqXzvTuvoyR 8g/DgNUrolADc9cmjyUjmNvpjCrDUcGbB1sNIQptOR7rWOzgGA9FRpTLLYkyCuw4dri3 WvGyCDY9ffp1JKGCIvCndIr4WjcgGcLVFTdW0Jg9EvfbgFFEQVBovSffzL2WRkKqFIT+ /LPU6A/izQ2WOpbrr1o6PXfU3Tu8KXX4aBBF7hFyVPjG0LlmpcPoVelIcxtho/Bn2G0I hxTA== X-Gm-Message-State: AOAM530HXZcAPxdvLKWl77Y6fw6+E+hXxIRE6N0oRQFlJ5riiHxP4Zie X1L2lS1azhdFKdC6vIrLvgA7MQ== X-Google-Smtp-Source: ABdhPJzviSzPw8DHPSWfKSBlhSs70+HDnfc2IZuZnH+dcN6HRqcj6pIpU9EtMMcwm7LCjQVzxHDJ0A== X-Received: by 2002:a17:902:864a:b029:ec:a5e0:6373 with SMTP id y10-20020a170902864ab02900eca5e06373mr32454622plt.48.1620773551525; Tue, 11 May 2021 15:52:31 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id j2sm2814440pji.34.2021.05.11.15.52.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:31 -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" , Masahiro Yamada Subject: [PATCH v10 2/5] USB: misc: Add onboard_usb_hub driver Date: Tue, 11 May 2021 15:52:20 -0700 Message-Id: <20210511155152.v10.2.I7c9a1f1d6ced41dd8310e8a03da666a32364e790@changeid> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210511225223.550762-1-mka@chromium.org> References: <20210511225223.550762-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The main issue this 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. Technically the driver consists of two drivers, the platform driver described above and a very thin USB driver that subclasses the generic driver. The purpose of this driver is to provide the platform driver with the USB devices corresponding to the hub(s) (a hub controller may provide multiple 'logical' hubs, e.g. one to support USB 2.0 and another for USB 3.x). Note: the driver currently only works with hubs connected directly to a root hub, but it could be extended to support other configurations if needed. Co-developed-by: Ravi Chandra Sadineni Signed-off-by: Ravi Chandra Sadineni Signed-off-by: Matthias Kaehlcke Acked-by: Alan Stern --- Changes in v10: - always use of_is_onboard_usb_hub() stub unless ONBOARD_USB_HUB=y/m Changes in v9: - none Changes in v8: - none Changes in v7: - don't declare stub for of_is_onboard_usb_hub() when CONFIG_COMPILE_TEST is defined Changes in v6: - use 'companion-hub' to locate the platform device, instead of scanning through the nodes of the parent - added ABI documentation for 'always_powered_in_suspend' - sysfs_emit() instead of sprintf() in always_powered_in_suspend_show() - register sysfs attribute through driver.dev_groups - evaluate return value of driver_attach() in _probe() - use dev_warn() instead of WARN_ON() in _probe() - include 'onboard_hub.h' Changes in v5: - the platform device is now instantiated from the same DT node as the 'primary' USB hub device - use the USB compatible strings for the platform device - refactored _find_onboard_hub() to search the parents child nodes for a platform device with a matching compatible string - added exported function of_is_onboard_usb_hub() to allow other drivers (like xhci_plat) to check if one of their child DT nodes is a supported hub - use late suspend to make sure info about wakeup enabled descendants is updated - call driver_attach() for the USB driver in onboard_hub_probe() to make sure the driver is re-attached after the device_release_driver() calls in onboard_hub_remove() - renamed sysfs attribute 'power_off_in_suspend' to 'always_powered_in_suspend' - added sysfs symlinks between platform device and USB devices - marked 'onboard_hub_pm_ops' as __maybe_unused - removed 'realtek' compatible string which is not needed at this point - fix log for regulator_disable() failure Changes in v4: - updated Kconfig documentation - changed the loop in onboard_hub_remove() to release the hub lock before unbinding the USB device and make self deadlock prevention less clunky - fixed return value in onboard_hub_usbdev_probe() - added entry to MAINTAINERS file Changes in v3: - updated the commit message - updated description in Kconfig - remove include of 'core/usb.h' - use 'is_powered_on' flag instead of 'has_wakeup_capable_descendants' - added 'going_away' flag to struct onboard_hub - don't allow adding new USB devices when the platform device is going away - don't bother with deleting the list item in onboard_hub_remove_usbdev() when the platform device is going away - don't assume in onboard_hub_suspend() that all USB hub devices are connected to the same controller - removed unnecessary devm_kfree() from onboard_hub_remove_usbdev() - fixed error handling in onboard_hub_remove_usbdev() - use kstrtobool() instead of strtobool() in power_off_in_suspend_store() - unbind USB devices in onboard_hub_remove() to avoid dangling references to the platform device - moved put_device() for platform device to _find_onboard_hub() - changed return value of onboard_hub_remove_usbdev() to void - evaluate return value of onboard_hub_add_usbdev() - register 'power_off_in_suspend' as managed device attribute - use USB_DEVICE macro instead manual initialization - add unwinding to onboard_hub_init() - updated MODULE_DESCRIPTION - use module_init() instead of device_initcall() Changes in v2: - check wakeup enabled state of the USB controller instead of using 'wakeup-source' property - use sysfs attribute instead of DT property to determine if the hub should be powered off at all during system suspend - added missing brace in onboard_hub_suspend() - updated commit message - use pm_ptr for pm_ops as suggested by Alan Changes in v1: - renamed the driver to 'onboard_usb_hub' - single file for platform and USB driver - USB hub devices register with the platform device - the DT includes a phandle of the platform device - the platform device now controls when power is turned off - the USB driver became a very thin subclass of the generic USB driver - enabled autosuspend support .../sysfs-bus-platform-onboard-usb-hub | 8 + MAINTAINERS | 7 + drivers/usb/misc/Kconfig | 17 + drivers/usb/misc/Makefile | 1 + drivers/usb/misc/onboard_usb_hub.c | 415 ++++++++++++++++++ include/linux/usb/onboard_hub.h | 15 + 6 files changed, 463 insertions(+) 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 diff --git a/Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub b/Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub new file mode 100644 index 000000000000..e981d83648e6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-platform-onboard-usb-hub @@ -0,0 +1,8 @@ +What: /sys/bus/platform/devices//always_powered_in_suspend +Date: March 2021 +KernelVersion: 5.13 +Contact: Matthias Kaehlcke + linux-usb@vger.kernel.org +Description: + (RW) Controls whether the USB hub remains always powered + during system suspend or not. \ No newline at end of file diff --git a/MAINTAINERS b/MAINTAINERS index d92f85ca831d..882ae6e378c5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13297,6 +13297,13 @@ S: Maintained T: git git://linuxtv.org/media_tree.git F: drivers/media/i2c/ov9734.c +ONBOARD USB HUB DRIVER +M: Matthias Kaehlcke +L: linux-usb@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml +F: drivers/usb/misc/onboard_usb_hub.c + ONENAND FLASH DRIVER M: Kyungmin Park L: linux-mtd@lists.infradead.org diff --git a/drivers/usb/misc/Kconfig b/drivers/usb/misc/Kconfig index 8f1144359012..f534269fbb20 100644 --- a/drivers/usb/misc/Kconfig +++ b/drivers/usb/misc/Kconfig @@ -284,3 +284,20 @@ config BRCM_USB_PINMAP This option enables support for remapping some USB external signals, which are typically on dedicated pins on the chip, to any gpio. + +config USB_ONBOARD_HUB + tristate "Onboard USB hub support" + depends on OF || COMPILE_TEST + help + Say Y here if you want to support discrete onboard USB hubs that + don't require an additional control bus for initialization, but + need some nontrivial form of initialization, such as enabling a + power regulator. An example for such a hub is the Realtek + RTS5411. + + The driver can be configured to turn off the power of the hub + during system suspend. This may reduce power consumption while + the system is suspended. + + To compile this driver as a module, choose M here: the + module will be called onboard_usb_hub. diff --git a/drivers/usb/misc/Makefile b/drivers/usb/misc/Makefile index 5f4e598573ab..2c5aec6f1b26 100644 --- a/drivers/usb/misc/Makefile +++ b/drivers/usb/misc/Makefile @@ -32,3 +32,4 @@ obj-$(CONFIG_USB_CHAOSKEY) += chaoskey.o obj-$(CONFIG_USB_SISUSBVGA) += sisusbvga/ obj-$(CONFIG_USB_LINK_LAYER_TEST) += lvstest.o obj-$(CONFIG_BRCM_USB_PINMAP) += brcmstb-usb-pinmap.o +obj-$(CONFIG_USB_ONBOARD_HUB) += onboard_usb_hub.o diff --git a/drivers/usb/misc/onboard_usb_hub.c b/drivers/usb/misc/onboard_usb_hub.c new file mode 100644 index 000000000000..db926699a5ec --- /dev/null +++ b/drivers/usb/misc/onboard_usb_hub.c @@ -0,0 +1,415 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for onboard USB hubs + * + * Copyright (c) 2020, Google LLC + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct usb_device_driver onboard_hub_usbdev_driver; + +/************************** Platform driver **************************/ + +struct udev_node { + struct usb_device *udev; + struct list_head list; +}; + +struct onboard_hub { + struct regulator *vdd; + struct device *dev; + bool always_powered_in_suspend; + bool is_powered_on; + bool going_away; + struct list_head udev_list; + struct mutex lock; +}; + +static int onboard_hub_power_on(struct onboard_hub *hub) +{ + int err; + + err = regulator_enable(hub->vdd); + if (err) { + dev_err(hub->dev, "failed to enable regulator: %d\n", err); + return err; + } + + hub->is_powered_on = true; + + return 0; +} + +static int onboard_hub_power_off(struct onboard_hub *hub) +{ + int err; + + err = regulator_disable(hub->vdd); + if (err) { + dev_err(hub->dev, "failed to disable regulator: %d\n", err); + return err; + } + + hub->is_powered_on = false; + + return 0; +} + +static int __maybe_unused onboard_hub_suspend(struct device *dev) +{ + struct onboard_hub *hub = dev_get_drvdata(dev); + struct udev_node *node; + bool power_off; + int rc = 0; + + if (hub->always_powered_in_suspend) + return 0; + + power_off = true; + + mutex_lock(&hub->lock); + + list_for_each_entry(node, &hub->udev_list, list) { + if (!device_may_wakeup(node->udev->bus->controller)) + continue; + + if (usb_wakeup_enabled_descendants(node->udev)) { + power_off = false; + break; + } + } + + mutex_unlock(&hub->lock); + + if (power_off) + rc = onboard_hub_power_off(hub); + + return rc; +} + +static int __maybe_unused onboard_hub_resume(struct device *dev) +{ + struct onboard_hub *hub = dev_get_drvdata(dev); + int rc = 0; + + if (!hub->is_powered_on) + rc = onboard_hub_power_on(hub); + + return rc; +} + +static int onboard_hub_add_usbdev(struct onboard_hub *hub, struct usb_device *udev) +{ + struct udev_node *node; + char link_name[64]; + int ret = 0; + + mutex_lock(&hub->lock); + + if (hub->going_away) { + ret = -EINVAL; + goto unlock; + } + + node = devm_kzalloc(hub->dev, sizeof(*node), GFP_KERNEL); + if (!node) { + ret = -ENOMEM; + goto unlock; + } + + node->udev = udev; + + list_add(&node->list, &hub->udev_list); + + snprintf(link_name, sizeof(link_name), "usb_dev.%s", dev_name(&udev->dev)); + WARN_ON(sysfs_create_link(&hub->dev->kobj, &udev->dev.kobj, link_name)); + +unlock: + mutex_unlock(&hub->lock); + + return ret; +} + +static void onboard_hub_remove_usbdev(struct onboard_hub *hub, struct usb_device *udev) +{ + struct udev_node *node; + char link_name[64]; + + snprintf(link_name, sizeof(link_name), "usb_dev.%s", dev_name(&udev->dev)); + sysfs_remove_link(&hub->dev->kobj, link_name); + + mutex_lock(&hub->lock); + + list_for_each_entry(node, &hub->udev_list, list) { + if (node->udev == udev) { + list_del(&node->list); + break; + } + } + + mutex_unlock(&hub->lock); +} + +static ssize_t always_powered_in_suspend_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct onboard_hub *hub = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", hub->always_powered_in_suspend); +} + +static ssize_t always_powered_in_suspend_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct onboard_hub *hub = dev_get_drvdata(dev); + bool val; + int ret; + + ret = kstrtobool(buf, &val); + if (ret < 0) + return ret; + + hub->always_powered_in_suspend = val; + + return count; +} +static DEVICE_ATTR_RW(always_powered_in_suspend); + +static struct attribute *onboard_hub_attrs[] = { + &dev_attr_always_powered_in_suspend.attr, + NULL, +}; +ATTRIBUTE_GROUPS(onboard_hub); + +static int onboard_hub_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct onboard_hub *hub; + int err; + + hub = devm_kzalloc(dev, sizeof(*hub), GFP_KERNEL); + if (!hub) + return -ENOMEM; + + hub->vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(hub->vdd)) + return PTR_ERR(hub->vdd); + + hub->dev = dev; + mutex_init(&hub->lock); + INIT_LIST_HEAD(&hub->udev_list); + + dev_set_drvdata(dev, hub); + + err = onboard_hub_power_on(hub); + if (err) + return err; + + /* + * The USB driver might have been detached from the USB devices by + * onboard_hub_remove(), make sure to re-attach it if needed. + */ + err = driver_attach(&onboard_hub_usbdev_driver.drvwrap.driver); + if (err) { + onboard_hub_power_off(hub); + return err; + } + + return 0; +} + +static int onboard_hub_remove(struct platform_device *pdev) +{ + struct onboard_hub *hub = dev_get_drvdata(&pdev->dev); + struct udev_node *node; + struct usb_device *udev; + + hub->going_away = true; + + mutex_lock(&hub->lock); + + /* unbind the USB devices to avoid dangling references to this device */ + while (!list_empty(&hub->udev_list)) { + node = list_first_entry(&hub->udev_list, struct udev_node, list); + udev = node->udev; + + /* + * Unbinding the driver will call onboard_hub_remove_usbdev(), + * which acquires hub->lock. We must release the lock first. + */ + get_device(&udev->dev); + mutex_unlock(&hub->lock); + device_release_driver(&udev->dev); + put_device(&udev->dev); + mutex_lock(&hub->lock); + } + + mutex_unlock(&hub->lock); + + return onboard_hub_power_off(hub); +} + +static const struct of_device_id onboard_hub_match[] = { + { .compatible = "usbbda,411" }, + { .compatible = "usbbda,5411" }, + {} +}; +MODULE_DEVICE_TABLE(of, onboard_hub_match); + +bool of_is_onboard_usb_hub(const struct device_node *np) +{ + return !!of_match_node(onboard_hub_match, np); +} +EXPORT_SYMBOL_GPL(of_is_onboard_usb_hub); + +static const struct dev_pm_ops __maybe_unused onboard_hub_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(onboard_hub_suspend, onboard_hub_resume) +}; + +static struct platform_driver onboard_hub_driver = { + .probe = onboard_hub_probe, + .remove = onboard_hub_remove, + + .driver = { + .name = "onboard-usb-hub", + .of_match_table = onboard_hub_match, + .pm = pm_ptr(&onboard_hub_pm_ops), + .dev_groups = onboard_hub_groups, + }, +}; + +/************************** USB driver **************************/ + +#define VENDOR_ID_REALTEK 0x0bda + +/* + * Returns the onboard_hub platform device that is associated with the USB + * device passed as parameter. + */ +static struct onboard_hub *_find_onboard_hub(struct device *dev) +{ + struct platform_device *pdev; + struct device_node *np; + phandle ph; + + pdev = of_find_device_by_node(dev->of_node); + if (!pdev) { + if (of_property_read_u32(dev->of_node, "companion-hub", &ph)) { + dev_err(dev, "failed to read 'companion-hub' property\n"); + return ERR_PTR(-EINVAL); + } + + np = of_find_node_by_phandle(ph); + if (!np) { + dev_err(dev, "failed to find device node for companion hub\n"); + return ERR_PTR(-EINVAL); + } + + pdev = of_find_device_by_node(np); + of_node_put(np); + + if (!pdev) + return ERR_PTR(-EPROBE_DEFER); + } + + put_device(&pdev->dev); + + return dev_get_drvdata(&pdev->dev); +} + +static int onboard_hub_usbdev_probe(struct usb_device *udev) +{ + struct device *dev = &udev->dev; + struct onboard_hub *hub; + int err; + + /* ignore supported hubs without device tree node */ + if (!dev->of_node) + return -ENODEV; + + hub = _find_onboard_hub(dev); + if (IS_ERR(hub)) + return PTR_ERR(hub); + + dev_set_drvdata(dev, hub); + + err = onboard_hub_add_usbdev(hub, udev); + if (err) + return err; + + err = sysfs_create_link(&udev->dev.kobj, &hub->dev->kobj, "onboard_hub_dev"); + if (err) + dev_warn(&udev->dev, "failed to create symlink to platform device: %d\n", err); + + return 0; +} + +static void onboard_hub_usbdev_disconnect(struct usb_device *udev) +{ + struct onboard_hub *hub = dev_get_drvdata(&udev->dev); + + sysfs_remove_link(&udev->dev.kobj, "onboard_hub_dev"); + + onboard_hub_remove_usbdev(hub, udev); +} + +static const struct usb_device_id onboard_hub_id_table[] = { + { USB_DEVICE(VENDOR_ID_REALTEK, 0x0411) }, /* RTS5411 USB 3.0 */ + { USB_DEVICE(VENDOR_ID_REALTEK, 0x5411) }, /* RTS5411 USB 2.0 */ + {}, +}; + +MODULE_DEVICE_TABLE(usb, onboard_hub_id_table); + +static struct usb_device_driver onboard_hub_usbdev_driver = { + + .name = "onboard-usb-hub", + .probe = onboard_hub_usbdev_probe, + .disconnect = onboard_hub_usbdev_disconnect, + .generic_subclass = 1, + .supports_autosuspend = 1, + .id_table = onboard_hub_id_table, +}; + +/************************** Driver (de)registration **************************/ + +static int __init onboard_hub_init(void) +{ + int ret; + + ret = platform_driver_register(&onboard_hub_driver); + if (ret) + return ret; + + ret = usb_register_device_driver(&onboard_hub_usbdev_driver, THIS_MODULE); + if (ret) + platform_driver_unregister(&onboard_hub_driver); + + return ret; +} +module_init(onboard_hub_init); + +static void __exit onboard_hub_exit(void) +{ + usb_deregister_device_driver(&onboard_hub_usbdev_driver); + platform_driver_unregister(&onboard_hub_driver); +} +module_exit(onboard_hub_exit); + +MODULE_AUTHOR("Matthias Kaehlcke "); +MODULE_DESCRIPTION("Driver for discrete onboard USB hubs"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/usb/onboard_hub.h b/include/linux/usb/onboard_hub.h new file mode 100644 index 000000000000..9be52dfae653 --- /dev/null +++ b/include/linux/usb/onboard_hub.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __LINUX_USB_ONBOARD_HUB_H +#define __LINUX_USB_ONBOARD_HUB_H + +#ifdef CONFIG_USB_ONBOARD_HUB +bool of_is_onboard_usb_hub(const struct device_node *np); +#else +static inline bool of_is_onboard_usb_hub(const struct device_node *np) +{ + return false; +} +#endif + +#endif /* __LINUX_USB_ONBOARD_HUB_H */ From patchwork Tue May 11 22:52:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12252297 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 483D9C433B4 for ; Tue, 11 May 2021 22:52:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 29F1961421 for ; Tue, 11 May 2021 22:52:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230182AbhEKWxm (ORCPT ); Tue, 11 May 2021 18:53:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230129AbhEKWxl (ORCPT ); Tue, 11 May 2021 18:53:41 -0400 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28837C06174A for ; Tue, 11 May 2021 15:52:33 -0700 (PDT) Received: by mail-pg1-x530.google.com with SMTP id m37so16807332pgb.8 for ; Tue, 11 May 2021 15:52:33 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=8aKnVtIxlUG/2eUQmNl0qPhaQg9l3TplAhr5B7EOd6U=; b=LvzERiaiALvJFXjzftXoHUCyKmzQ4UBbwHeONAJXlRmCEFlO7I1pPQBoo51KsymSOC izVUQGDqJF43p1PMQqu3RTbUEknJP2LEoPusHVkm35IFDHE1EcXzm+DDGZ9PnIg4GVln ZePnFPrFMA0JsA1+JnW4vWXx0HQ5ISkwnuUXg= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=8aKnVtIxlUG/2eUQmNl0qPhaQg9l3TplAhr5B7EOd6U=; b=FMToUWJuKlMealU4Ua9RXbbZDEfs0D2yAQsVL1pR1G15jKiGNO0vcjbhVULn2r42RT lEQJVZrpHHZIeiJwG7Psu1G39CPVMZt+0ZZmO1pKgqzjwwMxT/WrZ5zpw/gXxnQ/381t zqTQT0I4X9oSNacFUiUciP2NhovixalUVEH8a4hiHPqtGfVwgi801+Tkw29ACaytQ6rH cigsdjyHP/fRmbLggxtrgjhQ8drN/nfjQOIsG2WM6fZ2tG9eEkFcFp80/fdeiW0RZGl7 8a4X5qoTIZ4GSQ0o0Plc641n7whDM9tJAZRQrwkvjSbgIp+M2knd+wUk7xeHqLV2uzMJ +n5Q== X-Gm-Message-State: AOAM531YMbcsr9xV9UnH/t/nRCxBgKb4A2sdQoclqL0st1RYo0ujwPcg t1rGyvQJKPMFD5T7kquIT6iY1Q== X-Google-Smtp-Source: ABdhPJzcc0HOveQxurQucFIXSEwc1uBL9OYa3E78PzbfuEgM9Oc9XcjLr/Ej3fQt4k23AWDj8Izisg== X-Received: by 2002:a63:540b:: with SMTP id i11mr33172485pgb.44.1620773553616; Tue, 11 May 2021 15:52:33 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id x22sm14230968pfa.24.2021.05.11.15.52.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:33 -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 , Rob Herring Subject: [PATCH v10 3/5] of/platform: Add stubs for of_platform_device_create/destroy() Date: Tue, 11 May 2021 15:52:21 -0700 Message-Id: <20210511155152.v10.3.I08fd2e1c775af04f663730e9fb4d00e6bbb38541@changeid> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210511225223.550762-1-mka@chromium.org> References: <20210511225223.550762-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Code for platform_device_create() and of_platform_device_destroy() is only generated if CONFIG_OF_ADDRESS=y. Add stubs to avoid unresolved symbols when CONFIG_OF_ADDRESS is not set. Signed-off-by: Matthias Kaehlcke Acked-by: Rob Herring --- Changes in v10: - none Changes in v9: - added Rob's 'Acked-by' tag Changes in v8: - fixed C&P error in commit message Changes in v7: - none Changes in v6: - patch added to the series include/linux/of_platform.h | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h index 84a966623e78..d15b6cd5e1c3 100644 --- a/include/linux/of_platform.h +++ b/include/linux/of_platform.h @@ -61,16 +61,18 @@ static inline struct platform_device *of_find_device_by_node(struct device_node } #endif +extern int of_platform_bus_probe(struct device_node *root, + const struct of_device_id *matches, + struct device *parent); + +#ifdef CONFIG_OF_ADDRESS /* Platform devices and busses creation */ extern struct platform_device *of_platform_device_create(struct device_node *np, const char *bus_id, struct device *parent); extern int of_platform_device_destroy(struct device *dev, void *data); -extern int of_platform_bus_probe(struct device_node *root, - const struct of_device_id *matches, - struct device *parent); -#ifdef CONFIG_OF_ADDRESS + extern int of_platform_populate(struct device_node *root, const struct of_device_id *matches, const struct of_dev_auxdata *lookup, @@ -84,6 +86,18 @@ extern int devm_of_platform_populate(struct device *dev); extern void devm_of_platform_depopulate(struct device *dev); #else +/* Platform devices and busses creation */ +static inline struct platform_device *of_platform_device_create(struct device_node *np, + const char *bus_id, + struct device *parent) +{ + return NULL; +} +static inline int of_platform_device_destroy(struct device *dev, void *data) +{ + return -ENODEV; +} + static inline int of_platform_populate(struct device_node *root, const struct of_device_id *matches, const struct of_dev_auxdata *lookup, From patchwork Tue May 11 22:52:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12252299 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 23902C433B4 for ; Tue, 11 May 2021 22:52:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F340B61432 for ; Tue, 11 May 2021 22:52:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230210AbhEKWxv (ORCPT ); Tue, 11 May 2021 18:53:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230213AbhEKWxn (ORCPT ); Tue, 11 May 2021 18:53:43 -0400 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 854D4C06175F for ; Tue, 11 May 2021 15:52:36 -0700 (PDT) Received: by mail-pg1-x530.google.com with SMTP id q15so12567044pgg.12 for ; Tue, 11 May 2021 15:52:36 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=gRQceREUuiCBW1dDPT9pW8DTooXv4gDopBNig6+8fl4=; b=OW/P9sC+CSrENSE0CY93ntk7hv9X6EHj0SeYCSCRFvGnpoEkq8Sew+c+2aaen4Y4K4 kw5ZEA8bZQEfaC22bL9WCkpgBJCw7Oh2I2KMxHBBl09OiE0h3IHk0PpfLa2rRiyKnako YjWRH4n3oKTAQQHr4q8V0LQ2eu/E14u86KaOQ= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=gRQceREUuiCBW1dDPT9pW8DTooXv4gDopBNig6+8fl4=; b=H44HzDsPkj/zOuJmrvGxdxpi9g/PQVYFmOWmGhJYvpvqI6ETh27D8kD/IQHP9zGRr1 mvnyi1CwEUKLAksWS9oB5HfkQE4htQhPewf5K8QfEOxQTZ97IRrTE5gijhgzvIGVPupu FPZMRCO8WgDaQecV2XxoXQpsX9J2EC9PbfkCXrLATjWzD2bmSvxMrAtOTuSo/DbJeFj9 cveXkqpvhelfk3WYYpqooNZX8eoBotjIGT5z4X8EpJ2oPu3z0pWhOR6vM3RWpxrcZdQQ 9l7gxDhoRIESG5clMgXDuFQJD7jfBS8d/pyLse4U/C8kx+qx69yI2PHSrUqNS7dfQWGb xEOA== X-Gm-Message-State: AOAM533PE4mehNX8zwF4XThkJuXU8ftAE6cph5C2RAgpQJruP16BStOm /dWQocFlviENSWa1kG0xqLJfHw== X-Google-Smtp-Source: ABdhPJxC4sUDqeEqFhnkGv/ppoRkR1ADL9dIeJz19eEymRt580OLgyluH6yVAteZp+18x70blvmgsw== X-Received: by 2002:aa7:808d:0:b029:2bf:bf00:c6f6 with SMTP id v13-20020aa7808d0000b02902bfbf00c6f6mr12699793pff.64.1620773556081; Tue, 11 May 2021 15:52:36 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id h15sm14441528pfk.26.2021.05.11.15.52.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:35 -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 , Bjorn Andersson , Christian Lamparter , Colin Ian King , Dmitry Osipenko , Fabio Estevam , Masahiro Yamada , Mathias Nyman , Vinod Koul Subject: [PATCH v10 4/5] usb: host: xhci-plat: Create platform device for onboard hubs in probe() Date: Tue, 11 May 2021 15:52:22 -0700 Message-Id: <20210511155152.v10.4.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210511225223.550762-1-mka@chromium.org> References: <20210511225223.550762-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Check during probe() if a hub supported by the onboard_usb_hub driver is connected to the controller. If such a hub is found create the corresponding platform device. This requires the device tree to have a node for the hub with its vendor and product id (which is not common for USB devices). Further the platform device is only created when CONFIG_USB_ONBOARD_HUB=y/m. Signed-off-by: Matthias Kaehlcke --- Changes in v10: - none Changes in v9: - added dependency on USB_ONBOARD_HUB (or !!USB_ONBOARD_HUB) to USB_XHCI_PLATFORM Changes in v8: - none Changes in v7: - none Changes in v6: - none Changes in v5: - patch added to the series drivers/usb/host/Kconfig | 1 + drivers/usb/host/xhci-plat.c | 16 ++++++++++++++++ include/linux/usb/hcd.h | 2 ++ 3 files changed, 19 insertions(+) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index b94f2a070c05..da50496787fe 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -54,6 +54,7 @@ config USB_XHCI_PCI_RENESAS config USB_XHCI_PLATFORM tristate "Generic xHCI driver for a platform device" select USB_XHCI_RCAR if ARCH_RENESAS + depends on USB_ONBOARD_HUB || !USB_ONBOARD_HUB help Adds an xHCI host driver for a generic platform device, which provides a memory space and an irq. diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index c1edcc9b13ce..9c0fb7e8df1f 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -195,6 +196,7 @@ static int xhci_plat_probe(struct platform_device *pdev) int ret; int irq; struct xhci_plat_priv *priv = NULL; + struct device_node *np; if (usb_disabled()) @@ -374,6 +376,17 @@ static int xhci_plat_probe(struct platform_device *pdev) */ pm_runtime_forbid(&pdev->dev); + np = usb_of_get_device_node(hcd->self.root_hub, hcd->self.busnum); + if (np && of_is_onboard_usb_hub(np)) { + struct platform_device *pdev; + + pdev = of_platform_device_create(np, NULL, NULL); + if (pdev) + hcd->onboard_hub_dev = &pdev->dev; + else + xhci_warn(xhci, "failed to create onboard hub platform device\n"); + } + return 0; @@ -420,6 +433,9 @@ static int xhci_plat_remove(struct platform_device *dev) usb_remove_hcd(hcd); usb_put_hcd(shared_hcd); + if (hcd->onboard_hub_dev) + of_platform_device_destroy(hcd->onboard_hub_dev, NULL); + clk_disable_unprepare(clk); clk_disable_unprepare(reg_clk); usb_put_hcd(hcd); diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 96281cd50ff6..d02a508e19b0 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -225,6 +225,8 @@ struct usb_hcd { * (ohci 32, uhci 1024, ehci 256/512/1024). */ + struct device *onboard_hub_dev; + /* The HC driver's private data is stored at the end of * this structure. */ From patchwork Tue May 11 22:52:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 12252301 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 0AE18C43461 for ; Tue, 11 May 2021 22:52:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2DEF6192B for ; Tue, 11 May 2021 22:52:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230295AbhEKWxz (ORCPT ); Tue, 11 May 2021 18:53:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230172AbhEKWxv (ORCPT ); Tue, 11 May 2021 18:53:51 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFC70C06138D for ; Tue, 11 May 2021 15:52:38 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id c21so16812244pgg.3 for ; Tue, 11 May 2021 15:52:38 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=3dF8B31PNk7cPhkI1K+ifAM7LFjPxMuEN4CZDqsLjYs=; b=hOncJ7KhKMk9l1BHT4qKfG3LEJOMXRnF3BEuGVJyKHbmLZuhbhoFvOiT2N3Zq0k/Cz GTb6KrDlUHyCe99F/zw2L8+iV02SUphMf8pQzIZonTnlkk7JHOJG+CMhRbei9Af1iKK5 6VworG6f1jgx0QKBEta/hA0pIk13xe7gnjZlI= 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=3dF8B31PNk7cPhkI1K+ifAM7LFjPxMuEN4CZDqsLjYs=; b=WjmwDezgl8GoTcoK7xxl2wGonEorLwZlrwv73OPjL6yh7hyA7fQQ55W6hVTxGa3407 Nb2kQ3MXoDO5uBCkCTkuCvkzJwW+aNtNueAxexvqU8Hu6EjoGFnn29Ad+nPVpbYGdtZ8 NdD942IedpU2yAUNDfXzrCfW3QWxZIDEm4p77iRHxyF6oFZ37JnxeJFaHRY8xTD72t4/ Ib0MCQkcSURjljx3cn5/esd5SsTJ1CpVSLd0jtDpybXZ4mRxJHM6iHGbu9TD6ubU8ZiI OixpYQdqyexjUY//6xorm9C9OWeMsBagBL/b9tmpAV5q4Z0swS72ruvRbP1LuoeFhG1t p8gA== X-Gm-Message-State: AOAM530tjxg1IaGDCi+0Mcw7jvELFcCSlEoR9d9isZnKAyJYWdJlu/HV M3Fxf1T3bO6in2vEfMPq5eX0Yw== X-Google-Smtp-Source: ABdhPJzdwIoaihmRoDL6WGsLK7mSThzKjWrMJy63C9nRpC6zIzCkoV7CM+EFBQzvJcnkSYPIyma69w== X-Received: by 2002:a63:c13:: with SMTP id b19mr33088389pgl.198.1620773558275; Tue, 11 May 2021 15:52:38 -0700 (PDT) Received: from localhost ([2620:15c:202:201:f1d7:673a:456e:c653]) by smtp.gmail.com with UTF8SMTPSA id c15sm14510132pfo.176.2021.05.11.15.52.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 May 2021 15:52:37 -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 , Andy Gross , Bjorn Andersson , linux-arm-msm@vger.kernel.org Subject: [PATCH v10 5/5] arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub Date: Tue, 11 May 2021 15:52:23 -0700 Message-Id: <20210511155152.v10.5.Ie0d2c1214b767bb5551dd4cad38398bd40e4466f@changeid> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210511225223.550762-1-mka@chromium.org> References: <20210511225223.550762-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add nodes for the onboard USB hub on trogdor devices. Remove the 'always-on' property from the hub regulator, since the regulator is now managed by the onboard_usb_hub driver. Signed-off-by: Matthias Kaehlcke --- Changes in v10: - keep 'regulator-boot-on' property - updated commit message Changes in v9: - none Changes in v8: - none Changes in v7: - rebased on qcom/arm64-for-5.13 (with the rest of the series) Changes in v6: - added 'companion-hub' entry to both USB devices - added 'vdd-supply' also to hub@2 Changes in v5: - patch added to the series .../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 ++++++++++++++++++- 4 files changed, 38 insertions(+), 30 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts index 5c997cd90069..bae85f6b2bfa 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts @@ -23,17 +23,6 @@ &charger_thermal { status = "disabled"; }; -&pp3300_hub { - /* pp3300_l7c is used to power the USB hub */ - /delete-property/regulator-always-on; - /delete-property/regulator-boot-on; -}; - -&pp3300_l7c { - regulator-always-on; - regulator-boot-on; -}; - &sn65dsi86_out { /* * Lane 0 was incorrectly mapped on the cable, but we've now decided @@ -42,3 +31,11 @@ &sn65dsi86_out { */ lane-polarities = <1 0>; }; + +&usb_hub_2_0 { + vdd-supply = <&pp3300_l7c>; +}; + +&usb_hub_3_0 { + vdd-supply = <&pp3300_l7c>; +}; diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts index d9fbcc7bc5bd..45f014c3539d 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts @@ -23,13 +23,10 @@ &charger_thermal { status = "disabled"; }; -&pp3300_hub { - /* pp3300_l7c is used to power the USB hub */ - /delete-property/regulator-always-on; - /delete-property/regulator-boot-on; +&usb_hub_2_0 { + vdd-supply = <&pp3300_l7c>; }; -&pp3300_l7c { - regulator-always-on; - regulator-boot-on; +&usb_hub_3_0 { + vdd-supply = <&pp3300_l7c>; }; diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-r1.dts b/arch/arm64/boot/dts/qcom/sc7180-trogdor-r1.dts index 2b522f9e0d8f..2f5263e3d1b9 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-r1.dts +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-r1.dts @@ -42,17 +42,6 @@ &panel { compatible = "auo,b116xa01"; }; -&pp3300_hub { - /* pp3300_l7c is used to power the USB hub */ - /delete-property/regulator-always-on; - /delete-property/regulator-boot-on; -}; - -&pp3300_l7c { - regulator-always-on; - regulator-boot-on; -}; - &sdhc_2 { status = "okay"; }; @@ -61,6 +50,14 @@ &trackpad { interrupts = <58 IRQ_TYPE_EDGE_FALLING>; }; +&usb_hub_2_0 { + vdd-supply = <&pp3300_l7c>; +}; + +&usb_hub_3_0 { + vdd-supply = <&pp3300_l7c>; +}; + /* PINCTRL - modifications to sc7180-trogdor.dtsi */ &trackpad_int_1v8_odl { diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi index 192e2e424fde..0d6a7447dc77 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi @@ -206,7 +206,6 @@ pp3300_hub: pp3300-hub { pinctrl-names = "default"; pinctrl-0 = <&en_pp3300_hub>; - regulator-always-on; regulator-boot-on; vin-supply = <&pp3300_a>; @@ -848,6 +847,24 @@ &usb_1 { &usb_1_dwc3 { dr_mode = "host"; + #address-cells = <1>; + #size-cells = <0>; + + /* 2.0 hub on port 1 */ + usb_hub_2_0: hub@1 { + compatible = "usbbda,5411"; + reg = <1>; + vdd-supply = <&pp3300_hub>; + companion-hub = <&usb_hub_3_0>; + }; + + /* 3.0 hub on port 2 */ + usb_hub_3_0: hub@2 { + compatible = "usbbda,411"; + reg = <2>; + vdd-supply = <&pp3300_hub>; + companion-hub = <&usb_hub_2_0>; + }; }; &usb_1_hsphy {