diff options
| author |   Calvin Johnson <calvin.johnson@oss.nxp.com> | 2021-06-11 13:53:51 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-06-11 13:08:52 -0700 |
| commit | 114dea60043b8f0c82c67dd281719ef8919c2416 (patch) | |
| tree | 6d8acf20716818059c81af7b593412218e15d50b /drivers/net/phy | |
| parent | of: mdio: Refactor of_phy_find_device() (diff) | |
| download | linux-dev-114dea60043b8f0c82c67dd281719ef8919c2416.tar.xz linux-dev-114dea60043b8f0c82c67dd281719ef8919c2416.zip | |
net: phy: Introduce fwnode_get_phy_id()
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>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 786f464216dd..f7472a0cf771 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -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 |