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net: pcs: lynx: add lynx_pcs_create_fwnode()

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Add a helper to create a lynx PCS from a fwnode handle.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle) 2023-06-07 12:58:29 +01:00 committed by Jakub Kicinski
parent b3b984dc0b
commit 6e1a12821d
2 changed files with 30 additions and 0 deletions
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29
drivers/net/pcs/pcs-lynx.c
View File

@ -353,6 +353,35 @@ struct phylink_pcs *lynx_pcs_create_mdiodev(struct mii_bus *bus, int addr)
}
EXPORT_SYMBOL(lynx_pcs_create_mdiodev);
struct phylink_pcs *lynx_pcs_create_fwnode(struct fwnode_handle *node)
{
struct mdio_device *mdio;
struct phylink_pcs *pcs;
mdio = fwnode_mdio_find_device(node);
if (!mdio)
return ERR_PTR(-EPROBE_DEFER);
pcs = lynx_pcs_create(mdio);
/* Convert failure to create the PCS to an error pointer, so this
* function has a consistent return value strategy.
*/
if (!pcs)
pcs = ERR_PTR(-ENOMEM);
/* lynx_create() has taken a refcount on the mdiodev if it was
* successful. If lynx_create() fails, this will free the mdio
* device here. In any case, we don't need to hold our reference
* anymore, and putting it here will allow mdio_device_put() in
* lynx_destroy() to automatically free the mdio device.
*/
mdio_device_put(mdio);
return pcs;
}
EXPORT_SYMBOL_GPL(lynx_pcs_create_fwnode);
void lynx_pcs_destroy(struct phylink_pcs *pcs)
{
struct lynx_pcs *lynx = phylink_pcs_to_lynx(pcs);

1
include/linux/pcs-lynx.h
View File

@ -11,6 +11,7 @@
struct phylink_pcs *lynx_pcs_create(struct mdio_device *mdio);
struct phylink_pcs *lynx_pcs_create_mdiodev(struct mii_bus *bus, int addr);
struct phylink_pcs *lynx_pcs_create_fwnode(struct fwnode_handle *node);
void lynx_pcs_destroy(struct phylink_pcs *pcs);