From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx.nabladev.com (mx.nabladev.com [178.251.229.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A04649B5B9; Thu, 1 Oct 2026 22:00:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.251.229.89 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790892057; cv=none; b=kSfW6dvGJpD8PHgQAdTlDQLO6U4CZimhVJGCM03iWdylghO0oG+7O6fHFbuJqRD8hulKrSCCSVmDlw4bhgfZOgxaCHk//G/Ac+n0Ud+Y19t1AlZI2pSDn/SyQ35BVoOXqdWVFwJQXlbrunroWGxrkltCWqPfQxKd7ggAOIt87Zo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790892057; c=relaxed/simple; bh=ELivsARhygXT/WSI2Il9Y8RftwyUPEQXL7HxEm2Xews=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=IkjvWXlYdbGaSG2ChRI4gjpqGWtNWZAah89tFaj977u7c0zxFcYTAWff6tT3J6GCLe91neIbfqetMYLv1V8jymHIbLJwmOpkcyQ3kA6n68mUSlPuALSjbFXWmXo2PWK8KiKmlQ7OyotdHlzJers9/K4is30ubsm1/j1G9DAMkKE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nabladev.com; spf=pass smtp.mailfrom=nabladev.com; dkim=pass (2048-bit key) header.d=nabladev.com header.i=@nabladev.com header.b=bWMydpux; arc=none smtp.client-ip=178.251.229.89 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nabladev.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nabladev.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=nabladev.com header.i=@nabladev.com header.b="bWMydpux" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 1A4C71073A4; Fri, 02 Oct 2026 00:00:31 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nabladev.com; s=dkim; t=1790892035; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=FKrxggt6tXLHGGG9Az9Ua8a0Hw1UqySB4ol4URFxVGk=; b=bWMydpuxo1omedBW6n3KLeflnr/fWMnVMB5hPzZsoxMqTD+zwK+Xrv47g9qgDqjRP3LbX5 G32k6ed4zsJFX0CyCZiWLavUshopo5Pag6p0NJJMem6E/rQ3SueNtm2enV4DTfS+erRcif +4OJ1mjCUz/LJOWBy0tW4MNjj34DgyLA+i0UsNSwlA1NwD6DxtA7VUlVxQkViPIbVMXXV+ oGaW9+l0HnZb9Gw8RFqVBz9KUzsAi1a4CmuX4cyh4QUMOIil3JvVvwkO6JxY6tx7GBzsS5 LYHM9NLyyTRhuu42nnpOQygJgg/z1xAeclSDuK6fFcMjM2TJJn2c38TcxWxK5g== Message-ID: Date: Fri, 2 Oct 2026 00:00:29 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [net-next,PATCH v2] enetc: Increase eMDIO MDC rate to 2.5 MHz From: Marek Vasut To: Wei Fang , Clark Wang , Claudiu Manoil , Vladimir Oltean Cc: "David S. Miller" , Andrew Lunn , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "imx@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" References: <20260924180607.60932-1-marex@nabladev.com> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 On 9/30/26 3:27 PM, Marek Vasut wrote: Hello again, >> Clark helped measure the MDC rate on the 95 EVK board this morning, >> and the >> result was 644KHz, which is consistent with the theoretical value. The >> scope's >> accuracy or other factors may be causing you to observe a rate of 558kHz. > > That 644 kHz and 558 kHz differs too much to be an equipment > miscalibration / misuse. For the sake of completeness, the MX95 B0 I have on my desk now prints this in SM: >$ clock.r ... 097: busnetcmix = on, 133333333Hz 098: enet = on, 666666666Hz 099: enetphytest200m = on, 24000000Hz 100: enetphytest500m = on, 24000000Hz 101: enetphytest667m = on, 24000000Hz 102: enetref = on, 250000000Hz 103: enettimer1 = on, 24000000Hz And the cycle time of MDC is 1.8ms , which is some 550 kHz .