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phy: mdio-octeon: Refactor into two files/modules

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A follow-on patch uses PCI probing to find the Thunder MDIO hardware.
In preparation for this, split out the common code into a new file
mdio-cavium.c, which will be used by both the existing OCTEON driver,
and the new Thunder PCI based driver.

As part of the refactoring simplify the struct cavium_mdiobus by
removing fields that are only ever used in the probe function and can
just as well be local variables.

Use readq/writeq in preference to readq_relaxed/writeq_relaxed as the
relaxed form was an optimization for an early chip revision, and the
MDIO drivers are not performance bottlenecks that need optimization in
the first place.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Daney
2016-03-11 09:53:10 -08:00
committed by David S. Miller
parent 5fc7cf1794
commit 1eefee901f
5 changed files with 292 additions and 268 deletions
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11
drivers/net/phy/Kconfig
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@@ -183,15 +183,18 @@ config MDIO_GPIO
To compile this driver as a module, choose M here: the module
will be called mdio-gpio.
config MDIO_CAVIUM
tristate
config MDIO_OCTEON
tristate "Support for MDIO buses on Octeon and ThunderX SOCs"
tristate "Support for MDIO buses on Octeon and some ThunderX SOCs"
depends on 64BIT
depends on HAS_IOMEM
select MDIO_CAVIUM
help
This module provides a driver for the Octeon and ThunderX MDIO
busses. It is required by the Octeon and ThunderX ethernet device
drivers.
buses. It is required by the Octeon and ThunderX ethernet device
drivers on some systems.
config MDIO_SUN4I
tristate "Allwinner sun4i MDIO interface support"