netdev - [PATCH v2 0/2] add MDIO bus multiplexer driven by a regmap device

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Message-Id: <20181007182423.7342-1-pankaj.bansal@nxp.com>
Date:   Sun,  7 Oct 2018 23:54:21 +0530
From:   Pankaj Bansal <pankaj.bansal@....com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, Pankaj Bansal <pankaj.bansal@....com>,
        Varun Sethi <V.Sethi@....com>
Subject: [PATCH v2 0/2] add MDIO bus multiplexer driven by a regmap device

Add support for an MDIO bus multiplexer controlled by a regmap device, like an FPGA.

This driver is an extension of the existing driver drivers/net/phy/mdio-mux-mmioreg.c.

The problem with mmioreg driver is that it can operate only on memory mapped devices.
but if we have a device that controls mdio muxing and that device is controlled using
i2c or spi, then it will not work.

Therefore, added a driver that uses regmap device to control mdio mux.

Tested on a NXP LX2160AQDS board which uses the "QIXIS" FPGA attached to the i2c bus.

Cc: Varun Sethi <V.Sethi@....com>

Pankaj Bansal (2):
  dt-bindings: net: add MDIO bus multiplexer driven by a regmap device
  netdev/phy: add MDIO bus multiplexer driven by a regmap

 .../bindings/net/mdio-mux-regmap.txt          |  95 ++++++++++
 drivers/net/phy/Kconfig                       |  13 ++
 drivers/net/phy/Makefile                      |   1 +
 drivers/net/phy/mdio-mux-regmap.c             | 171 ++++++++++++++++++
 4 files changed, 280 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/mdio-mux-regmap.txt
 create mode 100644 drivers/net/phy/mdio-mux-regmap.c

-- 
2.17.1