From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.tipi-net.de (mail.tipi-net.de [194.13.80.246]) (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 8017E3A543A; Mon, 1 Jun 2026 13:26:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.13.80.246 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780320368; cv=none; b=tLYhzEjxgrUj0aSb4bPbPx7QuTgdIJTivgyZUUIX1SC1hvM5C5HmNssnIw48hxrHCz4og2m7IMh8LM64XbqtwADW901C5KmuIrB2ruU6p7DqwzgSqsj02YUbTQ1oNmDVSydwZXMEo5NcXwmOyfw/pyIUVkzNSHEKSB9EsUPDqDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780320368; c=relaxed/simple; bh=le79LbEmNjdRXJTILAC9NzYN6pt88MxtUEBHj0XQBtQ=; h=MIME-Version:Date:From:To:Cc:Subject:In-Reply-To:References: Message-ID:Content-Type; b=KWDUpO/2COjMvpUYhfhUK4x/gGIRcdagncgpfstxnwbOF/oLCM+/GdjikUSCCWITiC9PQOXNykUL+I7rH2RbpJvYZw0ih8JwmuJi/5UZlabRPjpmPTU3FZk0UXkPXzUu5D/wht4hRLVhsiYGHE9768erDBaPpse/53cw33pleNk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tipi-net.de; spf=pass smtp.mailfrom=tipi-net.de; dkim=pass (2048-bit key) header.d=tipi-net.de header.i=@tipi-net.de header.b=cIa9HeIH; arc=none smtp.client-ip=194.13.80.246 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tipi-net.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tipi-net.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tipi-net.de header.i=@tipi-net.de header.b="cIa9HeIH" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 502FAA08DA; Mon, 1 Jun 2026 15:25:59 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tipi-net.de; s=dkim; t=1780320362; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=m43hHnUk2TrrBU3R9f5h+D3RgpE/W+g1up4sANkurcQ=; b=cIa9HeIH1jnqLi5eGfMYRJdmT55E8TmQ2Oo3XLmGkunU1HmAr9/CKeAPCFogQGZTMi0xrY jOFeBk6aF/UTcONigJUFbes4HYnNszrQLnkARkO3qG3tt6C9KGrIYZ+4rurA3crKO/8am4 M8qOLWKE8e2fimgF6ppZeKBgoEHWE1BkU/MpvCCtBIBnEBeFUUfandgBvQiWkW9pKU72s/ 0AgzNIZQgzq5VODNQino4SJmRa8MFPL1z30fGBlYGi/jxG3xeibGEUbLj8SRbtq35hEjcD 3WQY/qoPu/hoPCMaiBWuURtfnq1Mtu/f7U4ANxOT+/1mWq0OVJPfkk5Wet20bg== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 01 Jun 2026 15:25:59 +0200 From: Nicolai Buchwitz To: Fidelio Lawson Cc: Woojung Huh , UNGLinuxDriver@microchip.com, Andrew Lunn , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Marek Vasut , Maxime Chevallier , Simon Horman , Heiner Kallweit , Russell King , Tristram Ha , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Fidelio Lawson , Marek Vasut Subject: Re: [PATCH net-next v8 3/3] net: phy: micrel: expose KSZ87xx low-loss cable tunables In-Reply-To: <20260601-ksz87xx_errata_low_loss_connections-v8-3-cfa102cf62c0@exotec.com> References: <20260601-ksz87xx_errata_low_loss_connections-v8-0-cfa102cf62c0@exotec.com> <20260601-ksz87xx_errata_low_loss_connections-v8-3-cfa102cf62c0@exotec.com> Message-ID: <2516d18e2acb66f9f13986506f168803@tipi-net.de> X-Sender: nb@tipi-net.de Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 Hi Fidelio On 1.6.2026 13:54, Fidelio Lawson wrote: > Add support for the KSZ87xx low-loss cable PHY tunables in the Micrel > PHY driver by implementing get_tunable and set_tunable callbacks. > > These callbacks expose vendor-specific PHY tunables used to control the > KSZ87xx embedded PHY receiver behavior when operating with short or > low-loss Ethernet cables. The tunables provide: > > - a boolean short-cable preset applying known good settings; > - an integer LPF bandwidth control; > - an integer DSP EQ initial value control. > > The Micrel PHY driver forwards these tunables via standard phy_read() / > phy_write() operations, which are virtualized by the KSZ8 DSA driver > and > translated into the appropriate indirect switch register accesses. > > Reviewed-by: Marek Vasut > Signed-off-by: Fidelio Lawson > --- > [...] Reviewed-by: Nicolai Buchwitz Thanks Nicolai