From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 56F29C71135 for ; Mon, 16 Jun 2025 07:28:22 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id C48EC81E18; Mon, 16 Jun 2025 09:28:20 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="t1bKWEFT"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id AF27A82AFD; Mon, 16 Jun 2025 09:28:18 +0200 (CEST) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 5CC9A80C93 for ; Mon, 16 Jun 2025 09:28:16 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=mkorpershoek@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id A15985C5730; Mon, 16 Jun 2025 07:25:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67BA6C4CEEE; Mon, 16 Jun 2025 07:28:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750058894; bh=HPKBRRQeCYsEdrtvMB+crUFT0GD7ypr200B2Fs9BLQ4=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=t1bKWEFTTmW7ZkQ/B0Bng9JjiqZmA5slPOQ32PGV2xwEc1lSnNwyHhMyZ9ys2ydG7 PwlcGCyTiKnBcBnHMVj272MDsEZNoARJK0B3oTWgLCWz9Sf4PCLQrb3SZv8dIM9vtv XRfRkCKNJXP0PnCzX+Hsy1PMpMdmyOmoYtNjwkkHw4gcD8aCTfSr0LUuCKW4W//qnL 8iRDgBVPbGYU2bkRY6wqUby+aX2RqDiEZ5kAEr3cgzUa4xByxZ0BeyxHBC617+DiLF Dj0w8lNJOnllpzgETMIRn/+sLb+Q88b+215RZQvvRPMJab5y0XqINGqFlboskQfgPB adXmExzQnb0gQ== From: Mattijs Korpershoek To: Mattijs Korpershoek , Zixun LI Cc: Eugen Hristev , Lukasz Majewski , Marek Vasut , Tom Rini , Mihai Sain , u-boot@lists.denx.de Subject: Re: [PATCH] usb: gadget: atmel: reliably generate disconnect by disabling controller instead of toggling PULLD_DIS In-Reply-To: <878qlsgncu.fsf@kernel.org> References: <20250602-pullup-v1-1-edcde5a050dd@hifiphile.com> <87iklbuddu.fsf@kernel.org> <87tt4k3sit.fsf@kernel.org> <878qlsgncu.fsf@kernel.org> Date: Mon, 16 Jun 2025 09:28:12 +0200 Message-ID: <875xgwgn77.fsf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean On Mon, Jun 16, 2025 at 09:24, Mattijs Korpershoek wrote: > On Fri, Jun 13, 2025 at 16:45, Zixun LI wrote: > >> On Fri, Jun 13, 2025 at 11:22=E2=80=AFAM Mattijs Korpershoek >> wrote: >>> >>> >>> Mihai, Zixun, do you have any update on case No.01589331 ? >>> >>> I'd like to pick this up and some point so please keep me informed. >>> >>> Thank you >>> Mattijs >>> >> >> Hi Mattijs, >> >> The case was reported in early May and MCHP have also observed the >> missing of detach event on host. >> >> My latest measure shows a differential signal level about +-350mV >> between DP&DM lines when >> DETACH and PULLD_DIS bits are 1, much lower than the detachment >> threshold of 625mV from >> USB 2.0 specification Table 7.3. >> >> From my view the patch can be picked, even on an unaffected family it >> won't have side effects. >> Unless one day we decide to implement SAM9RL and SAM9G45 errata then >> it needs to be retested. > > Ok, I will apply it. Since it's a bit late in the release cycle, I'll > send this out for -next. Zixun, before applying the patch, I'd like to add the comment I suggested in the code [1] as well. Do you you have any objections on that? PLease let me know [1] https://lore.kernel.org/all/87iklbuddu.fsf@kernel.org/ > > Thanks again for your contribution! > > Mattijs > >> >> Best Regards, >> Zixun