diff options
| -rw-r--r-- | target/linux/generic/backport-5.4/771-mdio-bus-add-generic-find-bus.patch | 67 | ||||
| -rw-r--r-- | target/linux/generic/pending-5.4/703-phy-add-detach-callback-to-struct-phy_driver.patch | 2 |
2 files changed, 68 insertions, 1 deletions
diff --git a/target/linux/generic/backport-5.4/771-mdio-bus-add-generic-find-bus.patch b/target/linux/generic/backport-5.4/771-mdio-bus-add-generic-find-bus.patch new file mode 100644 index 0000000000..b79fa0f18a --- /dev/null +++ b/target/linux/generic/backport-5.4/771-mdio-bus-add-generic-find-bus.patch @@ -0,0 +1,67 @@ +From ce69e2162f158d9d4a0e513971d02dabc7d14cb7 Mon Sep 17 00:00:00 2001 +From: Jeremy Linton <jeremy.linton@arm.com> +Date: Mon, 24 Feb 2020 16:53:58 -0600 +Subject: [PATCH] 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> +--- + drivers/net/phy/mdio_bus.c | 17 +++++++++++++++++ + include/linux/phy.h | 1 + + 2 files changed, 18 insertions(+) + +--- a/drivers/net/phy/mdio_bus.c ++++ b/drivers/net/phy/mdio_bus.c +@@ -260,6 +260,23 @@ static struct class mdio_bus_class = { + .dev_release = mdiobus_release, + }; + ++/** ++ * mdio_find_bus - Given the name of a mdiobus, find the mii_bus. ++ * @mdio_bus_np: Pointer to the mii_bus. ++ * ++ * Returns a reference to the mii_bus, or NULL if none found. The ++ * embedded struct device will have its reference count incremented, ++ * and this must be put_deviced'ed once the bus is finished with. ++ */ ++struct mii_bus *mdio_find_bus(const char *mdio_name) ++{ ++ struct device *d; ++ ++ d = class_find_device_by_name(&mdio_bus_class, mdio_name); ++ return d ? to_mii_bus(d) : NULL; ++} ++EXPORT_SYMBOL(mdio_find_bus); ++ + #if IS_ENABLED(CONFIG_OF_MDIO) + /** + * of_mdio_find_bus - Given an mii_bus node, find the mii_bus. +--- a/include/linux/phy.h ++++ b/include/linux/phy.h +@@ -273,6 +273,7 @@ static inline struct mii_bus *devm_mdiob + 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); + diff --git a/target/linux/generic/pending-5.4/703-phy-add-detach-callback-to-struct-phy_driver.patch b/target/linux/generic/pending-5.4/703-phy-add-detach-callback-to-struct-phy_driver.patch index b74b04ca59..e95cb6a4c5 100644 --- a/target/linux/generic/pending-5.4/703-phy-add-detach-callback-to-struct-phy_driver.patch +++ b/target/linux/generic/pending-5.4/703-phy-add-detach-callback-to-struct-phy_driver.patch @@ -23,7 +23,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org> sysfs_remove_link(&dev->dev.kobj, "phydev"); --- a/include/linux/phy.h +++ b/include/linux/phy.h -@@ -540,6 +540,12 @@ struct phy_driver { +@@ -541,6 +541,12 @@ struct phy_driver { /* Override default interrupt handling */ int (*handle_interrupt)(struct phy_device *phydev); |