We have several different boards with a multiplexer in the MDIO bus.
There is an MDIO bus controller connected to a switching device with
several child MDIO busses.
Everything is wired up using device tree bindings.
1/3 - New of_mdio_find_bus() function used to help configuring the
driver topology.
2/3 - MDIO bus multiplexer framework.
3/3 - A driver for a GPIO controlled multiplexer.
I have an additional patch I am working on for an I2C controlled
multiplexer that I will follow up with once this reaches a mergable
state.
David Daney (3):
netdev/of/phy: New function: of_mdio_find_bus().
netdev/of/phy: Add MDIO bus multiplexer support.
netdev/of/phy: Add MDIO bus multiplexer driven by GPIO lines.
.../devicetree/bindings/net/mdio-mux-gpio.txt | 127 ++++++++++++++
Documentation/devicetree/bindings/net/mdio-mux.txt | 132 ++++++++++++++
drivers/net/phy/Kconfig | 17 ++
drivers/net/phy/Makefile | 2 +
drivers/net/phy/mdio-mux-gpio.c | 143 +++++++++++++++
drivers/net/phy/mdio-mux.c | 182 ++++++++++++++++++++
drivers/net/phy/mdio_bus.c | 3 +-
drivers/of/of_mdio.c | 26 +++
include/linux/mdio-mux.h | 18 ++
include/linux/of_mdio.h | 2 +
include/linux/phy.h | 1 +
11 files changed, 652 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/mdio-mux-gpio.txt
create mode 100644 Documentation/devicetree/bindings/net/mdio-mux.txt
create mode 100644 drivers/net/phy/mdio-mux-gpio.c
create mode 100644 drivers/net/phy/mdio-mux.c
create mode 100644 include/linux/mdio-mux.h
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1.7.2.3
