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net: phy: Introduce fwnode_get_phy_id()

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Extract phy_id from compatible string. This will be used by
fwnode_mdiobus_register_phy() to create phy device using the
phy_id.

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Grant Likely <grant.likely@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Calvin Johnson 2021-06-11 13:53:51 +03:00 committed by David S. Miller
parent 2d7b8bf1fa
commit 114dea6004
2 changed files with 26 additions and 0 deletions
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21
drivers/net/phy/phy_device.c
View File

@ -834,6 +834,27 @@ static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
return 0;
}
/* Extract the phy ID from the compatible string of the form
* ethernet-phy-idAAAA.BBBB.
*/
int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
{
unsigned int upper, lower;
const char *cp;
int ret;
ret = fwnode_property_read_string(fwnode, "compatible", &cp);
if (ret)
return ret;
if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
return -EINVAL;
*phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
return 0;
}
EXPORT_SYMBOL(fwnode_get_phy_id);
/**
* get_phy_device - reads the specified PHY device and returns its @phy_device
* struct

5
include/linux/phy.h
View File

@ -1377,6 +1377,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
bool is_c45,
struct phy_c45_device_ids *c45_ids);
#if IS_ENABLED(CONFIG_PHYLIB)
int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id);
struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode);
struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode);
struct phy_device *device_phy_find_device(struct device *dev);
@ -1385,6 +1386,10 @@ struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
int phy_device_register(struct phy_device *phy);
void phy_device_free(struct phy_device *phydev);
#else
static inline int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
{
return 0;
}
static inline
struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
{