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Miller" , Jakub Kicinski Cc: Michael Grzeschik , kernel@pengutronix.de, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Russell King References: <20210426131911.25976-1-o.rempel@pengutronix.de> <20210426131911.25976-8-o.rempel@pengutronix.de> From: Florian Fainelli Message-ID: <94f76086-3819-4bbb-4bc7-d917cbef01bc@gmail.com> Date: Mon, 26 Apr 2021 11:23:55 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <20210426131911.25976-8-o.rempel@pengutronix.de> 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 On 4/26/21 6:19 AM, Oleksij Rempel wrote: > From: Andrew Lunn > > SMI0 is a mangled version of MDIO. The main low level difference is > the MDIO C22 OP code is always 0, not 0x2 or 0x1 for Read/Write. The > read/write information is instead encoded in the PHY address. > > Extend the bit-bang code to allow the op code to be overridden, but > default to normal C22 values. Add an extra compatible to the mdio-gpio > driver, and when this compatible is present, set the op codes to 0. > > A higher level driver, sitting on top of the basic MDIO bus driver can > then implement the rest of the microchip SMI0 odderties. > > Signed-off-by: Andrew Lunn > Signed-off-by: Michael Grzeschik > Signed-off-by: Oleksij Rempel Reviewed-by: Florian Fainelli -- Florian