From patchwork Wed Jul 27 14:11:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Stein X-Patchwork-Id: 594037 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DAAFC19F2C for ; Wed, 27 Jul 2022 14:11:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233349AbiG0OL3 (ORCPT ); Wed, 27 Jul 2022 10:11:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233284AbiG0OL1 (ORCPT ); Wed, 27 Jul 2022 10:11:27 -0400 Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7724C1CFFA; Wed, 27 Jul 2022 07:11:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1658931086; x=1690467086; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=m7F1W/DE5iYKj7SLPTvR+wGTzZX2PO7RknXp3Vp7DKg=; b=T854otFbrQxb9LjpWff0Ig4PxfHHTge8fEFrGHQYfvkzM3BxTTESH+Zo Y+79kc0W0/W8qbAkfoPJzR2BlM3Qh+9e0nTEOTzb96OJgc/xWu36UxlLf pFm8dQ1qGcqbiExiTGeH4lUNcS85g4qN9nAWw9g0sCQ6V9i/D0GEt32xc VtRQBpG5zLp2zdagP9yIJ7t86jk1K9kjhaI0rSTSZAYoVGrzVFuHVbUMZ X54ZNU0pgwkOZT/TimhwVcJpN0nQjCNEErCh6tbA6EispyI2P7zaS+Shf 32D/8p/Hrrnk9yrGGvK7LYgNTKl57i2DeqibcQ+q3fgiJ08Jm60XLTR1q w==; X-IronPort-AV: E=Sophos;i="5.93,195,1654552800"; d="scan'208";a="25297897" Received: from unknown (HELO tq-pgp-pr1.tq-net.de) ([192.168.6.15]) by mx1-pgp.tq-group.com with ESMTP; 27 Jul 2022 16:11:22 +0200 Received: from mx1.tq-group.com ([192.168.6.7]) by tq-pgp-pr1.tq-net.de (PGP Universal service); Wed, 27 Jul 2022 16:11:22 +0200 X-PGP-Universal: processed; by tq-pgp-pr1.tq-net.de on Wed, 27 Jul 2022 16:11:22 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1658931082; x=1690467082; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=m7F1W/DE5iYKj7SLPTvR+wGTzZX2PO7RknXp3Vp7DKg=; b=DHXP+7N4HorAZmR3lgFW/OspN3eRD4zcY6YyZeW02t9Q01oX7lupdZTp vN++hWwaCwNNgUt73aLh8mca4uxqa/eOrVSl5oBMC38lifxmGbmdjctUC KFIjcG7sY9iFuama0qyyA3rHiZUBuErF7WcDcIpBQRTQI1/wh6FsbGx/k Lk7EljBaNf+M6IpvqDCMdwyDBGCQqHK842MAejRmsnm3+F92KitsJwuNP iD+kD+vDuCeQPfr6vX7aatKbDOqi1cCdWAPxR/e1UTXM4VLxAbZES+iwE wu+n9F5DKj7Ju8QfRHwpoczonrNqefiJhw+SoErYYlGxl67Z0LWs0Gz40 Q==; X-IronPort-AV: E=Sophos;i="5.93,195,1654552800"; d="scan'208";a="25297895" Received: from vtuxmail01.tq-net.de ([10.115.0.20]) by mx1.tq-group.com with ESMTP; 27 Jul 2022 16:11:22 +0200 Received: from steina-w.tq-net.de (unknown [10.123.49.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by vtuxmail01.tq-net.de (Postfix) with ESMTPSA id E63D6280056; Wed, 27 Jul 2022 16:11:21 +0200 (CEST) From: Alexander Stein To: Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Matthias Kaehlcke Cc: Alexander Stein , linux-usb@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v4 1/2] usb: misc: onboard_usb_hub: Add reset-gpio support Date: Wed, 27 Jul 2022 16:11:16 +0200 Message-Id: <20220727141117.909361-1-alexander.stein@ew.tq-group.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Despite default reset upon probe, release reset line after powering up the hub and assert reset again before powering down. Signed-off-by: Alexander Stein Acked-by: Matthias Kaehlcke --- * Patch 1 dropped as it already applied Changes in v4: * Rebased to [1] commit e0c6b1f3d757 ("USB: usbsevseg: convert sysfs snprintf to sysfs_emit") * Added platform data for usb424 Reset pulse length taken from [2], Table 3-2 Symbol RESET_N Completely untested [1] https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git Branch usb-testing [2] http://ww1.microchip.com/downloads/en/devicedoc/00001692c.pdf drivers/usb/misc/onboard_usb_hub.c | 28 ++++++++++++++++++++++++++++ drivers/usb/misc/onboard_usb_hub.h | 22 +++++++++++++++++----- 2 files changed, 45 insertions(+), 5 deletions(-) diff --git a/drivers/usb/misc/onboard_usb_hub.c b/drivers/usb/misc/onboard_usb_hub.c index de3627af3c84..0c81417dd9a7 100644 --- a/drivers/usb/misc/onboard_usb_hub.c +++ b/drivers/usb/misc/onboard_usb_hub.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -38,6 +39,8 @@ struct usbdev_node { struct onboard_hub { struct regulator *vdd; struct device *dev; + const struct onboard_hub_pdata *pdata; + struct gpio_desc *reset_gpio; bool always_powered_in_suspend; bool is_powered_on; bool going_away; @@ -56,6 +59,9 @@ static int onboard_hub_power_on(struct onboard_hub *hub) return err; } + fsleep(hub->pdata->reset_us); + gpiod_set_value_cansleep(hub->reset_gpio, 0); + hub->is_powered_on = true; return 0; @@ -65,6 +71,11 @@ static int onboard_hub_power_off(struct onboard_hub *hub) { int err; + if (hub->reset_gpio) { + gpiod_set_value_cansleep(hub->reset_gpio, 1); + fsleep(hub->pdata->reset_us); + } + err = regulator_disable(hub->vdd); if (err) { dev_err(hub->dev, "failed to disable regulator: %d\n", err); @@ -219,6 +230,7 @@ static void onboard_hub_attach_usb_driver(struct work_struct *work) static int onboard_hub_probe(struct platform_device *pdev) { + const struct of_device_id *of_id; struct device *dev = &pdev->dev; struct onboard_hub *hub; int err; @@ -227,10 +239,26 @@ static int onboard_hub_probe(struct platform_device *pdev) if (!hub) return -ENOMEM; + of_id = of_match_device(onboard_hub_match, &pdev->dev); + if (!of_id) + return -ENODEV; + + hub->pdata = of_id->data; + if (!hub->pdata) + return -EINVAL; + hub->vdd = devm_regulator_get(dev, "vdd"); if (IS_ERR(hub->vdd)) return PTR_ERR(hub->vdd); + hub->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(hub->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(hub->reset_gpio), "failed to get reset GPIO\n"); + + if (hub->reset_gpio) + fsleep(hub->pdata->reset_us); + hub->dev = dev; mutex_init(&hub->lock); INIT_LIST_HEAD(&hub->udev_list); diff --git a/drivers/usb/misc/onboard_usb_hub.h b/drivers/usb/misc/onboard_usb_hub.h index 3820669eb98c..562fa48fcf10 100644 --- a/drivers/usb/misc/onboard_usb_hub.h +++ b/drivers/usb/misc/onboard_usb_hub.h @@ -6,12 +6,24 @@ #ifndef _USB_MISC_ONBOARD_USB_HUB_H #define _USB_MISC_ONBOARD_USB_HUB_H +struct onboard_hub_pdata { + unsigned long reset_us; /* reset pulse width in us */ +}; + +static const struct onboard_hub_pdata microchip_usb424_data = { + .reset_us = 1, +}; + +static const struct onboard_hub_pdata realtek_rts5411_data = { + .reset_us = 0, +}; + static const struct of_device_id onboard_hub_match[] = { - { .compatible = "usb424,2514" }, - { .compatible = "usbbda,411" }, - { .compatible = "usbbda,5411" }, - { .compatible = "usbbda,414" }, - { .compatible = "usbbda,5414" }, + { .compatible = "usb424,2514", .data = µchip_usb424_data, }, + { .compatible = "usbbda,411", .data = &realtek_rts5411_data, }, + { .compatible = "usbbda,5411", .data = &realtek_rts5411_data, }, + { .compatible = "usbbda,414", .data = &realtek_rts5411_data, }, + { .compatible = "usbbda,5414", .data = &realtek_rts5411_data, }, {} };