0ca2997d14
This patch adds a somewhat generic framework for MDIO bus
multiplexers. It is modeled on the I2C multiplexer.
The multiplexer is needed if there are multiple PHYs with the same
address connected to the same MDIO bus adepter, or if there is
insufficient electrical drive capability for all the connected PHY
devices.
Conceptually it could look something like this:
------------------
| Control Signal |
--------+---------
|
--------------- --------+------
| MDIO MASTER |---| Multiplexer |
--------------- --+-------+----
| |
C C
h h
i i
l l
d d
| |
--------- A B ---------
| | | | | |
| PHY@1 +-------+ +---+ PHY@1 |
| | | | | |
--------- | | ---------
--------- | | ---------
| | | | | |
| PHY@2 +-------+ +---+ PHY@2 |
| | | |
--------- ---------
This framework configures the bus topology from device tree data. The
mechanics of switching the multiplexer is left to device specific
drivers.
The follow-on patch contains a multiplexer driven by GPIO lines.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
152 lines
3.6 KiB
Plaintext
152 lines
3.6 KiB
Plaintext
#
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# PHY Layer Configuration
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#
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menuconfig PHYLIB
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tristate "PHY Device support and infrastructure"
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depends on !S390
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depends on NETDEVICES
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help
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Ethernet controllers are usually attached to PHY
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devices. This option provides infrastructure for
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managing PHY devices.
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if PHYLIB
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comment "MII PHY device drivers"
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config AMD_PHY
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tristate "Drivers for the AMD PHYs"
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---help---
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Currently supports the am79c874
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config MARVELL_PHY
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tristate "Drivers for Marvell PHYs"
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---help---
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Currently has a driver for the 88E1011S
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config DAVICOM_PHY
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tristate "Drivers for Davicom PHYs"
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---help---
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Currently supports dm9161e and dm9131
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config QSEMI_PHY
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tristate "Drivers for Quality Semiconductor PHYs"
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---help---
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Currently supports the qs6612
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config LXT_PHY
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tristate "Drivers for the Intel LXT PHYs"
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---help---
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Currently supports the lxt970, lxt971
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config CICADA_PHY
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tristate "Drivers for the Cicada PHYs"
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---help---
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Currently supports the cis8204
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config VITESSE_PHY
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tristate "Drivers for the Vitesse PHYs"
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---help---
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Currently supports the vsc8244
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config SMSC_PHY
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tristate "Drivers for SMSC PHYs"
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---help---
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Currently supports the LAN83C185, LAN8187 and LAN8700 PHYs
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config BROADCOM_PHY
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tristate "Drivers for Broadcom PHYs"
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---help---
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Currently supports the BCM5411, BCM5421, BCM5461, BCM5464, BCM5481
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and BCM5482 PHYs.
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config BCM63XX_PHY
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tristate "Drivers for Broadcom 63xx SOCs internal PHY"
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depends on BCM63XX
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---help---
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Currently supports the 6348 and 6358 PHYs.
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config ICPLUS_PHY
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tristate "Drivers for ICPlus PHYs"
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---help---
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Currently supports the IP175C and IP1001 PHYs.
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config REALTEK_PHY
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tristate "Drivers for Realtek PHYs"
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---help---
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Supports the Realtek 821x PHY.
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config NATIONAL_PHY
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tristate "Drivers for National Semiconductor PHYs"
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---help---
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Currently supports the DP83865 PHY.
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config STE10XP
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tristate "Driver for STMicroelectronics STe10Xp PHYs"
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---help---
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This is the driver for the STe100p and STe101p PHYs.
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config LSI_ET1011C_PHY
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tristate "Driver for LSI ET1011C PHY"
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---help---
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Supports the LSI ET1011C PHY.
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config MICREL_PHY
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tristate "Driver for Micrel PHYs"
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---help---
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Supports the KSZ9021, VSC8201, KS8001 PHYs.
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config FIXED_PHY
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bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"
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depends on PHYLIB=y
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---help---
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Adds the platform "fixed" MDIO Bus to cover the boards that use
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PHYs that are not connected to the real MDIO bus.
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Currently tested with mpc866ads and mpc8349e-mitx.
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config MDIO_BITBANG
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tristate "Support for bitbanged MDIO buses"
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help
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This module implements the MDIO bus protocol in software,
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for use by low level drivers that export the ability to
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drive the relevant pins.
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If in doubt, say N.
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config MDIO_GPIO
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tristate "Support for GPIO lib-based bitbanged MDIO buses"
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depends on MDIO_BITBANG && GENERIC_GPIO
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---help---
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Supports GPIO lib-based MDIO busses.
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To compile this driver as a module, choose M here: the module
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will be called mdio-gpio.
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config MDIO_OCTEON
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tristate "Support for MDIO buses on Octeon SOCs"
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depends on CPU_CAVIUM_OCTEON
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default y
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help
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This module provides a driver for the Octeon MDIO busses.
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It is required by the Octeon Ethernet device drivers.
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If in doubt, say Y.
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config MDIO_BUS_MUX
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tristate
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depends on OF_MDIO
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help
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This module provides a driver framework for MDIO bus
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multiplexers which connect one of several child MDIO busses
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to a parent bus. Switching between child busses is done by
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device specific drivers.
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endif # PHYLIB
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config MICREL_KS8995MA
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tristate "Micrel KS8995MA 5-ports 10/100 managed Ethernet switch"
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depends on SPI
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