From patchwork Sun Feb 27 15:30:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Geis X-Patchwork-Id: 546661 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 DE129C433F5 for ; Sun, 27 Feb 2022 15:30:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231488AbiB0PbB (ORCPT ); Sun, 27 Feb 2022 10:31:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231477AbiB0PbA (ORCPT ); Sun, 27 Feb 2022 10:31:00 -0500 Received: from mail-qv1-xf33.google.com (mail-qv1-xf33.google.com [IPv6:2607:f8b0:4864:20::f33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CD1A3FD9C; Sun, 27 Feb 2022 07:30:23 -0800 (PST) Received: by mail-qv1-xf33.google.com with SMTP id fc19so10561197qvb.7; Sun, 27 Feb 2022 07:30:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JPaFw68OuUtIuwUUWQ/YAMH/m6245D2UW9piC4irepM=; b=QjB3W0OjDdzllkWrrmQj4sqoi50Fvkt6qRrBwOXAUqncAhnM0ubVGdfmosWjbSAOqK SpjC5XeVyn5sxZftrpPDEzXijzLQ9ppZ8G6omobntjgUBWZIpiCLnJyuzAhU+MKn7oHh kUWlbpdTh6XP7k5W8A2VwZnyymPSpt8eHgqNQNo8I+sU7wsVkLjl+bmEUEyus35F0rKd 6SlD41h444MhU13w3dyabf+U+dhquTPZ3cYjqoP0BL7XRcYXg5Arae4LlA0IgsCv6aKf 9wkJXRm1b2DbU8uXh1Q8vq6/VdC/TmvyJQV/2Ss+n5LxBcYIjBY86U7EFC0pCFPkRMgj AXmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JPaFw68OuUtIuwUUWQ/YAMH/m6245D2UW9piC4irepM=; b=2ccwNCwfr0mYQvf4XeXi1qQEnN7UzCmzsZZcpeBu83PMIN7SzYiBxMwCWZw1BpMnVn aZKGz0wZ5HiW86aHQ0JVFcjfGhiMTtbzOzIzfPxg5pIXufnMi3psWXtsB2QXQjKrfd+O rdh38zmAFXppinKLxlp0r3ifFsoMpP2AdzMYfrfdBrRG1MuQJIz2PDlLw8PvNq6Ex2EF aOZRva3xF2GZF0n4imsXOrNLmctojU7ESP/NmMBJ/xvBadxx/g+x5jqGJljviS8Yo+4h RP7K5vICLCE2LsWDLmjruftHfz/jWgI6ujXse0gCIEhFNiHb8f+AtOqguZnIjRGACgFm XDgA== X-Gm-Message-State: AOAM532bjS39tJsjauvXB9TqwyNEZB+KD4D4rZCVowSTsevBuOXWSKoO 9xW14Ejrg1kuBS0I20Y6JsOqO2AcvRD+OQ== X-Google-Smtp-Source: ABdhPJwkNiMKD4sq0eim8Kc7aMuv/O+aOeFGkOcC5q2lyFBzrPzgjJY5l22E0FN1OyJTUxaIQic55A== X-Received: by 2002:a0c:e04c:0:b0:432:4007:b7de with SMTP id y12-20020a0ce04c000000b004324007b7demr11520611qvk.53.1645975822748; Sun, 27 Feb 2022 07:30:22 -0800 (PST) Received: from master-x64.sparksnet ([2601:153:980:85b1::10]) by smtp.gmail.com with ESMTPSA id s10-20020a05620a080a00b0062ce6f3f5d7sm3845767qks.16.2022.02.27.07.30.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Feb 2022 07:30:22 -0800 (PST) From: Peter Geis To: Felipe Balbi , Greg Kroah-Hartman Cc: linux-rockchip@lists.infradead.org, heiko@sntech.de, michael.riesch@wolfvision.net, jbx6244@gmail.com, Bin Yang , Peter Geis , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/7] usb: dwc3: core: do not use 3.0 clock when operating in 2.0 mode Date: Sun, 27 Feb 2022 10:30:13 -0500 Message-Id: <20220227153016.950473-5-pgwipeout@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220227153016.950473-1-pgwipeout@gmail.com> References: <20220227153016.950473-1-pgwipeout@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Bin Yang In the 3.0 device core, if the core is programmed to operate in 2.0 only, then setting the GUCTL1.DEV_FORCE_20_CLK_FOR_30_CLK makes the internal 2.0(utmi/ulpi) clock to be routed as the 3.0 (pipe) clock. Enabling this feature allows the pipe3 clock to be not-running when forcibly operating in 2.0 device mode. Signed-off-by: Bin Yang Signed-off-by: Peter Geis --- drivers/usb/dwc3/core.c | 5 +++++ drivers/usb/dwc3/core.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 18adddfba3da..416d83a055fe 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1167,6 +1167,11 @@ static int dwc3_core_init(struct dwc3 *dwc) if (dwc->parkmode_disable_ss_quirk) reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS; + if (DWC3_VER_IS_WITHIN(DWC3, 290A, ANY) && + (dwc->maximum_speed == USB_SPEED_HIGH || + dwc->maximum_speed == USB_SPEED_FULL)) + reg |= DWC3_GUCTL1_DEV_FORCE_20_CLK_FOR_30_CLK; + dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); } diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index eb9c1efced05..ea3ca04406bb 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -259,6 +259,7 @@ /* Global User Control 1 Register */ #define DWC3_GUCTL1_DEV_DECOUPLE_L1L2_EVT BIT(31) #define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS BIT(28) +#define DWC3_GUCTL1_DEV_FORCE_20_CLK_FOR_30_CLK BIT(26) #define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW BIT(24) #define DWC3_GUCTL1_PARKMODE_DISABLE_SS BIT(17)