From: Florian Fainelli <f.fainelli@gmail.com>
To: Oleksij Rempel <o.rempel@pengutronix.de>,
Woojung Huh <woojung.huh@microchip.com>,
UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: Michael Grzeschik <m.grzeschik@pengutronix.de>,
kernel@pengutronix.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Russell King <linux@armlinux.org.uk>
Subject: Re: [PATCH net-next v7 7/9] net: phy: Add support for microchip SMI0 MDIO bus
Date: Mon, 26 Apr 2021 11:23:55 -0700 [thread overview]
Message-ID: <94f76086-3819-4bbb-4bc7-d917cbef01bc@gmail.com> (raw)
In-Reply-To: <20210426131911.25976-8-o.rempel@pengutronix.de>
On 4/26/21 6:19 AM, Oleksij Rempel wrote:
> From: Andrew Lunn <andrew@lunn.ch>
>
> 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 <andrew@lunn.ch>
> Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
--
Florian
next prev parent reply other threads:[~2021-04-26 18:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-26 13:19 [PATCH net-next v7 0/9] microchip: add support for ksz88x3 driver family Oleksij Rempel
2021-04-26 13:19 ` [PATCH net-next v7 1/9] net: dsa: microchip: ksz8795: change drivers prefix to be generic Oleksij Rempel
2021-04-26 18:29 ` Florian Fainelli
2021-04-26 13:19 ` [PATCH net-next v7 2/9] net: dsa: microchip: ksz8795: move cpu_select_interface to extra function Oleksij Rempel
2021-04-26 18:30 ` Florian Fainelli
2021-04-26 13:19 ` [PATCH net-next v7 3/9] net: dsa: microchip: ksz8795: move register offsets and shifts to separate struct Oleksij Rempel
2021-04-26 18:32 ` Florian Fainelli
2021-04-26 13:19 ` [PATCH net-next v7 4/9] net: dsa: microchip: ksz8795: add support for ksz88xx chips Oleksij Rempel
2021-04-26 13:19 ` [PATCH net-next v7 5/9] net: dsa: microchip: Add Microchip KSZ8863 SPI based driver support Oleksij Rempel
2021-04-26 13:19 ` [PATCH net-next v7 6/9] dt-bindings: net: dsa: document additional Microchip KSZ8863/8873 switch Oleksij Rempel
2021-04-26 13:19 ` [PATCH net-next v7 7/9] net: phy: Add support for microchip SMI0 MDIO bus Oleksij Rempel
2021-04-26 18:23 ` Florian Fainelli [this message]
2021-04-26 13:19 ` [PATCH net-next v7 8/9] net: dsa: microchip: Add Microchip KSZ8863 SMI based driver support Oleksij Rempel
2021-04-26 13:19 ` [PATCH net-next v7 9/9] dt-bindings: net: mdio-gpio: add compatible for microchip,mdio-smi0 Oleksij Rempel
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