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net: mdiobus: Introduce fwnode_mdbiobus_register()

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This patch introduces a new helper function that
wraps acpi_/of_ mdiobus_register() and allows its
usage via common fwnode_ interface.

Fall back to raw mdiobus_register() in case CONFIG_FWNODE_MDIO
is not enabled, in order to satisfy compatibility
in all future user drivers.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcin Wojtas 2021-06-21 19:30:24 +02:00 committed by David S. Miller
parent 7c4d7ca8cc
commit 62a6ef6a99
2 changed files with 34 additions and 0 deletions
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22
drivers/net/mdio/fwnode_mdio.c
View File

@ -7,8 +7,10 @@
*/
#include <linux/acpi.h>
#include <linux/acpi_mdio.h>
#include <linux/fwnode_mdio.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
@ -142,3 +144,23 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
return 0;
}
EXPORT_SYMBOL(fwnode_mdiobus_register_phy);
/**
* fwnode_mdiobus_register - bring up all the PHYs on a given MDIO bus and
* attach them to it.
* @bus: Target MDIO bus.
* @fwnode: Pointer to fwnode of the MDIO controller.
*
* Return values are determined accordingly to acpi_/of_ mdiobus_register()
* operation.
*/
int fwnode_mdiobus_register(struct mii_bus *bus, struct fwnode_handle *fwnode)
{
if (is_acpi_node(fwnode))
return acpi_mdiobus_register(bus, fwnode);
else if (is_of_node(fwnode))
return of_mdiobus_register(bus, to_of_node(fwnode));
else
return -EINVAL;
}
EXPORT_SYMBOL(fwnode_mdiobus_register);

12
include/linux/fwnode_mdio.h
View File

@ -16,6 +16,7 @@ int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
int fwnode_mdiobus_register_phy(struct mii_bus *bus,
struct fwnode_handle *child, u32 addr);
int fwnode_mdiobus_register(struct mii_bus *bus, struct fwnode_handle *fwnode);
#else /* CONFIG_FWNODE_MDIO */
int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
struct phy_device *phy,
@ -30,6 +31,17 @@ static inline int fwnode_mdiobus_register_phy(struct mii_bus *bus,
{
return -EINVAL;
}
static inline int fwnode_mdiobus_register(struct mii_bus *bus,
struct fwnode_handle *fwnode)
{
/*
* Fall back to mdiobus_register() function to register a bus.
* This way, we don't have to keep compat bits around in drivers.
*/
return mdiobus_register(mdio);
}
#endif
#endif /* __LINUX_FWNODE_MDIO_H */