From patchwork Wed Jun 9 22:02:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 458263 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=-19.0 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, 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 A509AC48BD1 for ; Wed, 9 Jun 2021 22:04:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87C80613F0 for ; Wed, 9 Jun 2021 22:04:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230246AbhFIWGH (ORCPT ); Wed, 9 Jun 2021 18:06:07 -0400 Received: from mail-pj1-f44.google.com ([209.85.216.44]:54207 "EHLO mail-pj1-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230152AbhFIWGB (ORCPT ); Wed, 9 Jun 2021 18:06:01 -0400 Received: by mail-pj1-f44.google.com with SMTP id ei4so2424142pjb.3 for ; Wed, 09 Jun 2021 15:03:54 -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=6jiGScDFO2XxYhEoC2Vrk3Dt4e+9N07hRnYEMTleq1g=; b=VxhQIFEat/MDncMzO8pwQfVxbz3PC8IhkcSk8KIYf701sftcSmC8mm3OmtLGLndCTR 2JPChSv7H8fTqs5lxXSbD58Co0KdcUf+TpYYWm53ysLpWIz5kM8SFtz03zyPJ5oyLOpP +jn6+xgOxqlINHz88qaHcFpaOMnI7Txpjya64= 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=6jiGScDFO2XxYhEoC2Vrk3Dt4e+9N07hRnYEMTleq1g=; b=bxUXsvhfdqJlZJ7eT234a5KBPYlVdZ52/6ONLBue26RCoXLWLds2VzSBq2jhk+8b+g eZFWy7chSDYXdGXlvCxF9fFiZfBQQsKBKFWGl1XRLf9NQGTZ7JQJ9mJ7tvPX9s+geGxw z69LmW4uOsVytEL9YeHbtU7rhQGCq6HKet+KFbQBjol0Qjg6fU9mXtoQhOxZ6qcrzLhs Nwg5ZB14GgOzAXZkszdAj0YFdP8BPzfkgx3AYA7hGFW1G8OTMcNHUOZgf8ndOyJP2Uwt HUaoVPZydbT+f90ooNv6CEYqRwLqeEDPO1sMIrCyKcpwm3LmTTyNYSrPiVCeHXXOqTXH AKJA== X-Gm-Message-State: AOAM5316l8B6NJ+2replVmF+mVXdd7LHaBccn6XMtJi1BixwhDjznfhb uoFJPLTtLz++YhrN97cr6jtPNQ== X-Google-Smtp-Source: ABdhPJx8yb5+ef4dZCcV2CIiXFNoL3tpQpThfz0vUQsyHCfBjgmVO6eF+3b2JxPtrhxukptDdMe0cA== X-Received: by 2002:a17:90a:fa4f:: with SMTP id dt15mr13028928pjb.30.1623276174580; Wed, 09 Jun 2021 15:02:54 -0700 (PDT) Received: from localhost ([2620:15c:202:201:cedb:c2b5:f22c:760]) by smtp.gmail.com with UTF8SMTPSA id x20sm436916pfu.205.2021.06.09.15.02.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Jun 2021 15:02:54 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Peter Chen , Bastien Nocera , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , linux-kernel@vger.kernel.org, Michal Simek , Krzysztof Kozlowski , Douglas Anderson , Matthias Kaehlcke , Rob Herring Subject: [PATCH v12 1/5] dt-bindings: usb: Add binding for Realtek RTS5411 hub controller Date: Wed, 9 Jun 2021 15:02:45 -0700 Message-Id: <20210609150159.v12.1.I248292623d3d0f6a4f0c5bc58478ca3c0062b49a@changeid> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog In-Reply-To: <20210609220249.86061-1-mka@chromium.org> References: <20210609220249.86061-1-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 v12: - none Changes in v11: - none 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 Wed Jun 9 22:02:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 458262 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=-24.0 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,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 077FCC48BE5 for ; Wed, 9 Jun 2021 22:04:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E151C613F0 for ; Wed, 9 Jun 2021 22:04:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230306AbhFIWGJ (ORCPT ); Wed, 9 Jun 2021 18:06:09 -0400 Received: from mail-pl1-f172.google.com ([209.85.214.172]:40941 "EHLO mail-pl1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230190AbhFIWGE (ORCPT ); Wed, 9 Jun 2021 18:06:04 -0400 Received: by mail-pl1-f172.google.com with SMTP id e7so13465541plj.7 for ; Wed, 09 Jun 2021 15:03:56 -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=fTMN/ip73ihLeYfNQNNBzMxaAGZHDEIT8NNWvJR8kzs=; b=mERjMqLJcMRvTKlQdfkhzZk7LqmQuFQ3Is6Cqdyc1J8f/n6lp0t6wMKXNglUvz6i0C kmzJbKG3Radij+Mllc/Rx4hSnL175vk9EZyxJocOiiuQ9pi4dWvb2GexbSZpC0cWWGZJ PatgH6yiLQp0xs+9nxwl60mvJVEASzOKWMDZQ= 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=fTMN/ip73ihLeYfNQNNBzMxaAGZHDEIT8NNWvJR8kzs=; b=CXsnoGUYTG0wnscI67o+a/vU6OpqjskW8O+pxlfpmq/Gzdd/3LWL913+Ql2CRzxyUG istYX50hn0nqeCba83/kALkv70tUCkSvac0685pI+xq6Q02NJNJNWWDlho+HNH7P7STL sbQfdHIcc6oiNTb5YWmXtg0Qc2GVqqj52O42gS/FNQm7e0/5o7Su9/OdiUovxEsG3Tlc 2dqbEIlROzGTL1P31TXQZkkLNdX1vUGaEvcRI80j4I+8JdU+vyCpQ8Qu8w/4EsgUVQ6y IBIgsAseI7/EuZF52hfqKKS0mqasCHZT8HcqlQ5i/byGnI6xjxa5udM2esLicy1q7Ukx TuQg== X-Gm-Message-State: AOAM5318mgIcChs7y8+M2AGgymAaMmgE6ZUJbm4D2vEmJtZJXuS2sj7/ dVXrde4ruTWv8IGM8/fLW8UGIw== X-Google-Smtp-Source: ABdhPJxu5GaE8sU4j+0Lrd/eXu0hyexnqcxtcVdaa/othYdnhp0mGRKkarX+AEOlGPqN1jHbDgKCWg== X-Received: by 2002:a17:90a:380d:: with SMTP id w13mr1023198pjb.174.1623276176173; Wed, 09 Jun 2021 15:02:56 -0700 (PDT) Received: from localhost ([2620:15c:202:201:cedb:c2b5:f22c:760]) by smtp.gmail.com with UTF8SMTPSA id cl4sm126849pjb.32.2021.06.09.15.02.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Jun 2021 15:02:55 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Peter Chen , Bastien Nocera , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , linux-kernel@vger.kernel.org, Michal Simek , Krzysztof Kozlowski , Douglas Anderson , Matthias Kaehlcke , Al Cooper , "Alexander A. Klimov" , Masahiro Yamada Subject: [PATCH v12 2/5] USB: misc: Add onboard_usb_hub driver Date: Wed, 9 Jun 2021 15:02:46 -0700 Message-Id: <20210609150159.v12.2.I7c9a1f1d6ced41dd8310e8a03da666a32364e790@changeid> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog In-Reply-To: <20210609220249.86061-1-mka@chromium.org> References: <20210609220249.86061-1-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 current series only supports hubs connected directly to a root hub (through xhci-plat), support for other configurations could be added 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 v12: - use IS_ENABLED(CONFIG_USB_ONBOARD_HUB_MODULE) in onboard_hub.h to also check for the driver built as module - include onboard_hub.h again from the driver to make sure there are prototype declarations for the public functions - remove indentation from label in onboard_hub_create_pdevs() Changes in v11: - added onboard_hub_create/destroy_pdevs() helpers, to support multiple onboard hubs connected to the same parent hub - don't include ‘onboard_hub.h’ from the onboard hub driver - updated commit message - added ‘Acked-by' from Alan 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 | 497 ++++++++++++++++++ include/linux/usb/onboard_hub.h | 18 + 6 files changed, 548 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 bd7aff0c120f..32220210345d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13613,6 +13613,13 @@ 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..ed1f5424ea5f --- /dev/null +++ b/drivers/usb/misc/onboard_usb_hub.c @@ -0,0 +1,497 @@ +// 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 +#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); + +static bool of_is_onboard_usb_hub(const struct device_node *np) +{ + return !!of_match_node(onboard_hub_match, np); +} + +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, +}; + +/*** Helpers for creating/destroying platform devices for onboard hubs ***/ + +struct pdev_list_entry { + struct platform_device *pdev; + struct list_head node; +}; + +/* + * Creates a platform device for each supported onboard hub that is connected to + * the given parent hub. To keep track of the platform devices they are added to + * a list that is owned by the parent hub. + */ +void onboard_hub_create_pdevs(struct usb_device *parent_hub, struct list_head *pdev_list) +{ + int i; + phandle ph; + struct device_node *np, *npc; + struct platform_device *pdev; + struct pdev_list_entry *pdle; + + for (i = 1; i <= parent_hub->maxchild; i++) { + np = usb_of_get_device_node(parent_hub, i); + if (!np) + continue; + + if (!of_is_onboard_usb_hub(np)) + goto node_put; + + if (of_property_read_u32(np, "companion-hub", &ph)) + goto node_put; + + npc = of_find_node_by_phandle(ph); + if (!npc) + goto node_put; + + pdev = of_find_device_by_node(npc); + of_node_put(npc); + + if (pdev) { + /* the companion hub already has a platform device, nothing to do here */ + put_device(&pdev->dev); + goto node_put; + } + + pdev = of_platform_device_create(np, NULL, &parent_hub->dev); + if (pdev) { + pdle = kzalloc(sizeof(*pdle), GFP_KERNEL); + if (!pdle) + goto node_put; + + INIT_LIST_HEAD(&pdle->node); + + pdle->pdev = pdev; + list_add(&pdle->node, pdev_list); + } else { + dev_err(&parent_hub->dev, + "failed to create platform device for onboard hub '%s'\n", + of_node_full_name(np)); + } + +node_put: + of_node_put(np); + } +} +EXPORT_SYMBOL_GPL(onboard_hub_create_pdevs); + +/* + * Destroys the platform devices in the given list and frees the memory associated + * with the list entry. + */ +void onboard_hub_destroy_pdevs(struct list_head *pdev_list) +{ + struct pdev_list_entry *pdle, *tmp; + + list_for_each_entry_safe(pdle, tmp, pdev_list, node) { + of_platform_device_destroy(&pdle->pdev->dev, NULL); + kfree(pdle); + } +} +EXPORT_SYMBOL_GPL(onboard_hub_destroy_pdevs); + +/************************** 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..d9373230556e --- /dev/null +++ b/include/linux/usb/onboard_hub.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __LINUX_USB_ONBOARD_HUB_H +#define __LINUX_USB_ONBOARD_HUB_H + +struct usb_device; +struct list_head; + +#if IS_ENABLED(CONFIG_USB_ONBOARD_HUB) +void onboard_hub_create_pdevs(struct usb_device *parent_hub, struct list_head *pdev_list); +void onboard_hub_destroy_pdevs(struct list_head *pdev_list); +#else +static inline void onboard_hub_create_pdevs(struct usb_device *parent_hub, + struct list_head *pdev_list) {} +static inline void onboard_hub_destroy_pdevs(struct list_head *pdev_list) {} +#endif + +#endif /* __LINUX_USB_ONBOARD_HUB_H */ From patchwork Wed Jun 9 22:02:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 458264 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=-19.0 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, 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 A571EC48BCF for ; Wed, 9 Jun 2021 22:03:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 871D7613E7 for ; Wed, 9 Jun 2021 22:03:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229981AbhFIWFG (ORCPT ); Wed, 9 Jun 2021 18:05:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229972AbhFIWFG (ORCPT ); Wed, 9 Jun 2021 18:05:06 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0EBEC06175F for ; Wed, 9 Jun 2021 15:02:57 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id n12so20841294pgs.13 for ; Wed, 09 Jun 2021 15:02:57 -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=5jdb1/nf8Xf9cHJr9ZwJVMdonN98y7jZdc9Uui2zD+k=; b=R5+Kw9O6I/1IU7kGnU0zCC2WYUDL/FKN3hR9p1DTSWqqrBG27MXbHsMkqbygwGuPW3 bO/Wq4Z1GIilKr2Jrs4OMtzYEqOk28JSyj8hyIRqE7GDNDifwwKWwvegTd3JVRdOPtP0 F4K1d8+MiIR5RmqrKs6w6YNeURP3rNVdGDt2s= 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=5jdb1/nf8Xf9cHJr9ZwJVMdonN98y7jZdc9Uui2zD+k=; b=SbGZW8mIcOXKNN+4TqHFHlkdSmshRFTMFO5xT9tGc5P/Ja0swwJjTb6TLWa+K/bRbp GgL2tbNFOVB4GX14E3hIA7GAatOK/ENI7IHEVzhjKYLGQ1aMo47neBoytoc1+ijp4Aep G8D96ZwtM/trVNF6aIEGU77TTJdCxSH6CQ64Fxt/2r+9+NxoYsHJ6kT3dYirysarnw7+ mogWNqdacmqaaNBMdaNkNLfiI7LGShKhxrcC07cPsztu01nH1QAnAsXuDYMi7vQFPJJa gOweL/4z2S/TqnQjUDtnerKfy3vCBFk6CcQku8CJTtuKizWIHVOcfSMZs9h1e5ugBZ5c bWKA== X-Gm-Message-State: AOAM530PGmUrSAZTm0/Mx27WstJbQw1BzRzGjBFtwtwNUodxHxLBYu1y m+DBgl0MGaunvdCMSCUtnk1YgA== X-Google-Smtp-Source: ABdhPJzI+fIpPynsyQz/5H0at0akyidamyrNszW2JK2IwL29M8TGVkWfOER20Wk69wGis6Op8lNzig== X-Received: by 2002:a65:64c8:: with SMTP id t8mr1789309pgv.96.1623276177491; Wed, 09 Jun 2021 15:02:57 -0700 (PDT) Received: from localhost ([2620:15c:202:201:cedb:c2b5:f22c:760]) by smtp.gmail.com with UTF8SMTPSA id v15sm430659pfm.216.2021.06.09.15.02.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Jun 2021 15:02:57 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Peter Chen , Bastien Nocera , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , linux-kernel@vger.kernel.org, Michal Simek , Krzysztof Kozlowski , Douglas Anderson , Matthias Kaehlcke , Rob Herring Subject: [PATCH v12 3/5] of/platform: Add stubs for of_platform_device_create/destroy() Date: Wed, 9 Jun 2021 15:02:47 -0700 Message-Id: <20210609150159.v12.3.I08fd2e1c775af04f663730e9fb4d00e6bbb38541@changeid> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog In-Reply-To: <20210609220249.86061-1-mka@chromium.org> References: <20210609220249.86061-1-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 v12: - none Changes in v11: - none 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 Wed Jun 9 22:02:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 457300 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=-19.0 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, 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 A4AFAC48BDF for ; Wed, 9 Jun 2021 22:03:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8FB72613DF for ; Wed, 9 Jun 2021 22:03:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230058AbhFIWFI (ORCPT ); Wed, 9 Jun 2021 18:05:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229990AbhFIWFH (ORCPT ); Wed, 9 Jun 2021 18:05:07 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A54DC061760 for ; Wed, 9 Jun 2021 15:02:59 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id q25so19707584pfh.7 for ; Wed, 09 Jun 2021 15:02:59 -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=tBXaa96gkEcrez3XfbWTRkN94qRcOqCNrg/xPXrSfJQ=; b=j9YLeloJtZ+oepsi7GOIyR9WupUSSk6gofMBtI8fh//b1alo2TWTE3GOP8Mb7VdHdU 2VQ74iux1WawF6/+SfERl5TUK1BE14YPe2Q42hvFUk+NIqjiBfbbuGLbTe30ZJ0/Phji uACAf1+sasWJrV1r4TE2Lw+Belq/IYjZMyORc= 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=tBXaa96gkEcrez3XfbWTRkN94qRcOqCNrg/xPXrSfJQ=; b=o0ZBDNQw3lojEQyCdDnFe5ADNyCQHd+8LPXvlUu8qPdxrcLkmbZjn2LOfPC6GlQqda mLpHYoxuFnfb2rP8PpcwuD+6unCNclzd8tEd9nomES1fWmKBkZ56e60eEZhwnhqFeh42 zcsq3V0BgEvj5g0S1JqGq4nj2wWQc3vEebQrM8qW7Gl2gwLmpEy+x5l2aUA2xjRQTPwN 4j6lu7eUCyNSiAxitsGQVIED/IX/hNh+Eple2B11TSBqbp1ojnomxYjOMMn4LdWLlfgt ner0zeFjvZJD1yWDzX8+66K6PGua2YVU4GLQR5kPjxMVhhrfwz1hRxfQ0MT2o3sRyhOX SaAw== X-Gm-Message-State: AOAM532wXbumrY79FYLAk+4MkWD/M/qnU7xEm0e5+w0a68tUmGCf3EVM rliElMNa1exGSFtuiIkfqfQFYw== X-Google-Smtp-Source: ABdhPJyChSG4rElteqFEVFYEJRB93kZRZik3O+xaGyYNE5hbAl/TemNQFZtHaPrtALcboE8ULpFfWg== X-Received: by 2002:a62:6d07:0:b029:2e9:1e3c:ad54 with SMTP id i7-20020a626d070000b02902e91e3cad54mr1581684pfc.46.1623276178844; Wed, 09 Jun 2021 15:02:58 -0700 (PDT) Received: from localhost ([2620:15c:202:201:cedb:c2b5:f22c:760]) by smtp.gmail.com with UTF8SMTPSA id w125sm422342pfw.214.2021.06.09.15.02.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Jun 2021 15:02:58 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Peter Chen , Bastien Nocera , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , linux-kernel@vger.kernel.org, Michal Simek , Krzysztof Kozlowski , Douglas Anderson , Matthias Kaehlcke , Colin Ian King , Dmitry Osipenko , Fabio Estevam , Masahiro Yamada Subject: [PATCH v12 4/5] usb: host: xhci-plat: Create platform device for onboard hubs in probe() Date: Wed, 9 Jun 2021 15:02:48 -0700 Message-Id: <20210609150159.v12.4.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog In-Reply-To: <20210609220249.86061-1-mka@chromium.org> References: <20210609220249.86061-1-mka@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Call onboard_hub_create/destroy_pdevs() from _probe()/_remove() to create/destroy platform devices for onboard USB hubs that may be connected to the root hub of the controller. These functions are a NOP unless CONFIG_USB_ONBOARD_HUB=y/m. Also add a field to struct xhci_hcd to keep track of the onboard hub platform devices that are owned by the xHCI. Signed-off-by: Matthias Kaehlcke --- Changes in v12: - none Changes in v11: - use onboard_hub_create/destroy_pdevs() to support multiple onboard hubs that are connected to the same root hub - moved field/list to keep track of platform devices from struct usb_hcd to struct xhci_hcd - updated commit message 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 | 6 ++++++ drivers/usb/host/xhci.h | 2 ++ 3 files changed, 9 insertions(+) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index df9428f1dc5e..46818b232204 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..ee98a3671619 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 @@ -374,6 +375,9 @@ static int xhci_plat_probe(struct platform_device *pdev) */ pm_runtime_forbid(&pdev->dev); + INIT_LIST_HEAD(&xhci->onboard_hub_devs); + onboard_hub_create_pdevs(hcd->self.root_hub, &xhci->onboard_hub_devs); + return 0; @@ -420,6 +424,8 @@ static int xhci_plat_remove(struct platform_device *dev) usb_remove_hcd(hcd); usb_put_hcd(shared_hcd); + onboard_hub_destroy_pdevs(&xhci->onboard_hub_devs); + clk_disable_unprepare(clk); clk_disable_unprepare(reg_clk); usb_put_hcd(hcd); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 2595a8f057c4..52d9b28745de 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1919,6 +1919,8 @@ struct xhci_hcd { struct dentry *debugfs_slots; struct list_head regset_list; + struct list_head onboard_hub_devs; + void *dbc; /* platform-specific data -- must come last */ unsigned long priv[] __aligned(sizeof(s64)); From patchwork Wed Jun 9 22:02:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Kaehlcke X-Patchwork-Id: 457298 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=-19.0 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, 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 4ED81C48BCD for ; Wed, 9 Jun 2021 22:04:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38855613E7 for ; Wed, 9 Jun 2021 22:04:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230222AbhFIWGN (ORCPT ); Wed, 9 Jun 2021 18:06:13 -0400 Received: from mail-pl1-f170.google.com ([209.85.214.170]:38500 "EHLO mail-pl1-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230164AbhFIWGK (ORCPT ); Wed, 9 Jun 2021 18:06:10 -0400 Received: by mail-pl1-f170.google.com with SMTP id 69so13459394plc.5 for ; Wed, 09 Jun 2021 15:04:00 -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=lme9KpCil2St/RX+Aa4LOvZfU5uqoZ7j82GK9a82fTM=; b=JNGUmfSWaMSyXLRrtPmPrACyYmuJpQP1NXeFy7poGGHRbhEh6sc+/GR0bbbyE2IjiN 1XcCXZ2Rke35D4qY13u0XCNN1FaR0wLtO3uwX+dZ9nTOeOKVwulcTXhZUssbv/jay+lq TpnRjXegyvOJ5eLlZjzpMNBtQIgZZgx6dIVrA= 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=lme9KpCil2St/RX+Aa4LOvZfU5uqoZ7j82GK9a82fTM=; b=G6Z/hrGLi/9QjsCTjszlJInvurxYpyDUJZOOqSQc1qAeLIbpMliDIDzOHANtx2Bt9g RJwqsuAbg1uQ3ozF/nMEQ+PnHhPRjfAM/sYtDz7UVNWlLgTzrCChL28n6Ja9nGmpLyNQ bFW/C+dYCgyF45yWVCF1GDdtFbdMjUeIg2GTfqTa2OKRRVBUjOj/oLPqi+1ZfKPjDqyf NZ0wZfS4GvRMa1y8VJRDttkh0xo0PAJkOxJRDuXsE+/uipwU9VvpZciqW7kb33pfk4p/ X3/0pkSFdKeSJ96zTpdA0h6zw58varvygmWUTX9hetkG9hzvoU+RhmR/vVRP5cOhzhbP iLaA== X-Gm-Message-State: AOAM532LJfute4undN5AdZvlafRhkLZrGYD37IH3Qeo2ZcAgAX/Swd08 iK7JKgQ8MfDIqDpX7JiNKAs7og== X-Google-Smtp-Source: ABdhPJz8+5kfV2K+QPiA2UztUGJikKqSraayZvYo3SCSDmUrDF4JGBL6lAMtaVPgYPFDWLq0UeweCA== X-Received: by 2002:a17:903:184:b029:111:b4d9:8e8c with SMTP id z4-20020a1709030184b0290111b4d98e8cmr1396900plg.49.1623276180542; Wed, 09 Jun 2021 15:03:00 -0700 (PDT) Received: from localhost ([2620:15c:202:201:cedb:c2b5:f22c:760]) by smtp.gmail.com with UTF8SMTPSA id a4sm510392pjw.46.2021.06.09.15.02.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 09 Jun 2021 15:02:59 -0700 (PDT) From: Matthias Kaehlcke To: Greg Kroah-Hartman , Alan Stern , Rob Herring , Frank Rowand , Mathias Nyman Cc: Peter Chen , Bastien Nocera , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Ravi Chandra Sadineni , Stephen Boyd , linux-kernel@vger.kernel.org, Michal Simek , Krzysztof Kozlowski , Douglas Anderson , Matthias Kaehlcke , Andy Gross , Bjorn Andersson , linux-arm-msm@vger.kernel.org Subject: [PATCH v12 5/5] arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub Date: Wed, 9 Jun 2021 15:02:49 -0700 Message-Id: <20210609150159.v12.5.Ie0d2c1214b767bb5551dd4cad38398bd40e4466f@changeid> X-Mailer: git-send-email 2.32.0.rc1.229.g3e70b5a671-goog In-Reply-To: <20210609220249.86061-1-mka@chromium.org> References: <20210609220249.86061-1-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 v12: - none Changes in v11: - rebased on qcom/arm64-for-5.14 (with the rest of the series) 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 | 12 +++++------- .../arm64/boot/dts/qcom/sc7180-trogdor-r1.dts | 19 ++++++++----------- arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 19 ++++++++++++++++++- 4 files changed, 39 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 30e3e769d2b4..5fb8e12af1a0 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r0.dts @@ -14,17 +14,6 @@ / { compatible = "google,lazor-rev0", "qcom,sc7180"; }; -&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 @@ -33,3 +22,11 @@ &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 c2ef06367baf..1dae714250f5 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor-r1.dts @@ -14,13 +14,11 @@ / { compatible = "google,lazor-rev1", "google,lazor-rev2", "qcom,sc7180"; }; -&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 a4cbdc36c306..3345ca650a4c 100644 --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi @@ -202,7 +202,6 @@ pp3300_hub: pp3300-hub { pinctrl-names = "default"; pinctrl-0 = <&en_pp3300_hub>; - regulator-always-on; regulator-boot-on; vin-supply = <&pp3300_a>; @@ -903,6 +902,24 @@ &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 {