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author | 2020-02-24 16:53:58 -0600 | |
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committer | 2020-02-24 15:31:23 -0800 | |
commit | ce69e2162f158d9d4a0e513971d02dabc7d14cb7 (patch) | |
tree | 2fc144771e32d66fda00288b1df25725b535a5ef /include | |
parent | freescale: Replace zero-length array with flexible-array member (diff) | |
download | linux-ce69e2162f158d9d4a0e513971d02dabc7d14cb7.tar.gz linux-ce69e2162f158d9d4a0e513971d02dabc7d14cb7.tar.bz2 linux-ce69e2162f158d9d4a0e513971d02dabc7d14cb7.zip |
mdio_bus: Add generic mdio_find_bus()
It appears most ethernet drivers follow one of two main strategies
for mdio bus/phy management. A monolithic model where the net driver
itself creates, probes and uses the phy, and one where an external
mdio/phy driver instantiates the mdio bus/phy and the net driver
only attaches to a known phy. Usually in this latter model the phys
are discovered via DT relationships or simply phy name/address
hardcoding.
This is a shame because modern well behaved mdio buses are self
describing and can be probed. The mdio layer itself is fully capable
of this, yet there isn't a clean way for a standalone net driver
to attach and enumerate the discovered devices. This is because
outside of of_mdio_find_bus() there isn't a straightforward way
to acquire the mii_bus pointer.
So, lets add a mdio_find_bus which can return the mii_bus based
only on its name.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/phy.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/phy.h b/include/linux/phy.h index 80f8b2158271..e72dbd0d2d6a 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -289,6 +289,7 @@ static inline struct mii_bus *devm_mdiobus_alloc(struct device *dev) return devm_mdiobus_alloc_size(dev, 0); } +struct mii_bus *mdio_find_bus(const char *mdio_name); void devm_mdiobus_free(struct device *dev, struct mii_bus *bus); struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr); |