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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B215C4332F for ; Mon, 14 Nov 2022 11:43:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236260AbiKNLng (ORCPT ); Mon, 14 Nov 2022 06:43:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236229AbiKNLnb (ORCPT ); Mon, 14 Nov 2022 06:43:31 -0500 Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5044A247; Mon, 14 Nov 2022 03:43:26 -0800 (PST) Received: by mail-lj1-x231.google.com with SMTP id k19so12809706lji.2; Mon, 14 Nov 2022 03:43:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject:from:to:cc :subject:date:message-id:reply-to; bh=1xnVkVYt6NjXq2U10H+GjcZriFeppA49EKxZL4u1ETg=; b=DJYPWegol9Mp+1bBiyC6kheikgEvnJnOVLlM56Ma2GdT+L4kHpqtLxdqoJS24ZT5Kx 9PIQgwfK5ZVi/V2CUpvBZb6Ga0zgQK2ABH7cFZ5/LdW56zYq8oUfgPdxwSOOgzbvkO14 ufmIiDp2SBsuSqL6co4532zebqLlkVNfFhMWESDA5YFBGq8pWuFzDtHtaIYkM7vB2fCd UeZZ4jaghHRxjxVxe+mt5YHjOgTYqN11bjGoo5erCApseMko7oXuhj3Rt2PpsCtyzqcy KZ8tBKEUXljtyf9SMCUC12kBv4/scKdLuINUKdA6ZdnCzJ62N2+1vgo4h+pimP2A7aVS wvdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=1xnVkVYt6NjXq2U10H+GjcZriFeppA49EKxZL4u1ETg=; b=FmDt9yH75d7d/yF2Senm3kR6LxpM7oGa/gzAYD6lOZ6+PcYWDfcZvNyYiC0pXdaONl zbQAzYv/x3focnQFQBJQcztZdPuAzcZXbEViTt2FKv+pGJcsD213OeKxvlvxrjd3Ic4V ZQtkwOLbh0+2WOqbpewmOwMFpCPjCrxcHuanBJEwg9lXKT4LWguau/PG+RlDmjV+zjzy r3drI3xTSKere6c/GDZobvG3oaSmruLejR+g8SG4V2WkLt/sqLuzSnFVVTDLQ0NZ88eX 67flCVfwSszOk0VVYEUYOJmxpAunan8kWrIBeMRUOF34UO97OB9+5W9HFhxDj+YGnhqh ExhA== X-Gm-Message-State: ANoB5pnWgqdAWpeG8pdys4u/AomVDUKBw+MmU0C1hMEkZTTSqD/yjVdN H4tR9b7AlrtL6j+8Qrq6eOZtH+kUzsE= X-Google-Smtp-Source: AA0mqf4dfqmYZ1FjH1UgobSbvCvX8bwQXhiu0h+VQoHba7Wk2f0YpqJTU83M4MTmIQhSNHpV9VVXVw== X-Received: by 2002:a05:651c:88a:b0:277:2:1efc with SMTP id d10-20020a05651c088a00b0027700021efcmr4389600ljq.77.1668426204721; Mon, 14 Nov 2022 03:43:24 -0800 (PST) Received: from [192.168.1.103] ([178.176.74.221]) by smtp.gmail.com with ESMTPSA id v26-20020ac2593a000000b00492b494c4e8sm1793818lfi.298.2022.11.14.03.43.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Nov 2022 03:43:24 -0800 (PST) Subject: Re: [net] net: usb: smsc95xx: fix external PHY reset To: Alexandru Tachici , linux-kernel@vger.kernel.org Cc: andrew@lunn.ch, linux@armlinux.org.uk, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, steve.glendinning@shawell.net, UNGLinuxDriver@microchip.com, andre.edich@microchip.com, linux-usb@vger.kernel.org References: <20221114131643.19450-1-alexandru.tachici@analog.com> From: Sergei Shtylyov Message-ID: Date: Mon, 14 Nov 2022 14:43:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <20221114131643.19450-1-alexandru.tachici@analog.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! On 11/14/22 4:16 PM, Alexandru Tachici wrote: > An external PHY needs settling time after power up or reser. Reset? :-) > In the bind() function an mdio bus is registered. If at this point > the external PHY is still initialising, no valid PHY ID will be > read and on phy_find_first() the bind() function will fail. > > If an external PHY is present, wait the maximum time specified > in 802.3 45.2.7.1.1. > > Fixes: 05b35e7eb9a1 ("smsc95xx: add phylib support") > Signed-off-by: Alexandru Tachici [...] MBR, Sergey