Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934965AbcJUQIg (ORCPT ); Fri, 21 Oct 2016 12:08:36 -0400 Received: from vps0.lunn.ch ([178.209.37.122]:51043 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755661AbcJUQId (ORCPT ); Fri, 21 Oct 2016 12:08:33 -0400 Date: Fri, 21 Oct 2016 18:08:07 +0200 From: Andrew Lunn To: Neil Armstrong Cc: khilman@baylibre.com, carlo@caione.org, linus.walleij@linaro.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [RFC PATCH 08/13] dwmac-meson8b: add support for phy selection Message-ID: <20161021160807.GT16974@lunn.ch> References: <1477060838-14164-1-git-send-email-narmstrong@baylibre.com> <1477060838-14164-9-git-send-email-narmstrong@baylibre.com> <20161021155408.GR16974@lunn.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 462 Lines: 15 Hi Neil > Yes this would be a good idea if we were able to scan the internal > and external PHYs at the same time, but with our limited knowledge > the values we write in the register seems to switch a mux for the > whole RMII and MDIO signals to either interface. Ah, O.K. So you need something like: drivers/net/phy/mdio-mux-mmioreg.c This seems to be limited to a single byte for the mux register, so you might need to make some extensions. Andrew