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| author | Maxime Chevallier <maxime.chevallier@bootlin.com> | 2023-06-01 17:14:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-06-05 11:56:36 +0300 |
| commit | 642af0f92cbe01c4b05eb38a0fe94867a3798b34 (patch) | |
| tree | 02476954314f58e1eb89f23151df3876d6fb4cd2 /drivers/net/mdio/Kconfig | |
| parent | f69de8aa4752adae750892c71711a5b806ec0dff (diff) | |
| download | linux-642af0f92cbe01c4b05eb38a0fe94867a3798b34.tar.xz | |
net: mdio: Introduce a regmap-based mdio driver
There exists several examples today of devices that embed an ethernet
PHY or PCS directly inside an SoC. In this situation, either the device
is controlled through a vendor-specific register set, or sometimes
exposes the standard 802.3 registers that are typically accessed over
MDIO.
As phylib and phylink are designed to use mdiodevices, this driver
allows creating a virtual MDIO bus, that translates mdiodev register
accesses to regmap accesses.
The reason we use regmap is because there are at least 3 such devices
known today, 2 of them are Altera TSE PCS's, memory-mapped, exposed
with a 4-byte stride in stmmac's dwmac-socfpga variant, and a 2-byte
stride in altera-tse. The other one (nxp,sja1110-base-tx-mdio) is
exposed over SPI.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/mdio/Kconfig')
| -rw-r--r-- | drivers/net/mdio/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index 9ff2e6f22f3f..4a7a303be2f7 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -185,6 +185,17 @@ config MDIO_IPQ8064 This driver supports the MDIO interface found in the network interface units of the IPQ8064 SoC +config MDIO_REGMAP + tristate + help + This driver allows using MDIO devices that are not sitting on a + regular MDIO bus, but still exposes the standard 802.3 register + layout. It's regmap-based so that it can be used on integrated, + memory-mapped PHYs, SPI PHYs and so on. A new virtual MDIO bus is + created, and its read/write operations are mapped to the underlying + regmap. Users willing to use this driver must explicitly select + REGMAP. + config MDIO_THUNDER tristate "ThunderX SOCs MDIO buses" depends on 64BIT |