net: phy: micrel: allow usage of generic ethernet-phy clock

The generic ethernet-phy binding allows describing an external clock since
commit 350b7a258f20 ("dt-bindings: net: phy: Document support for external PHY clk")
for cases where the phy is not supplied by an oscillator but instead
by a clock from the host system.

And the old named "rmii-ref" clock from 2014 is only specified for phys
of the KSZ8021, KSZ8031, KSZ8081, KSZ8091 types.

So allow retrieving and enabling the optional generic clock on phys that
do not provide a rmii-ref clock.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20231201150131.326766-3-heiko@sntech.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index de116a0753a134327c4080effc6e9debda56a086..d2aa3d0695e3367410f0b61bbe44e7b849e36d2c 100644 (file)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -2021,6 +2021,11 @@ static int kszphy_probe(struct phy_device *phydev)
                                   rate);
                        return -EINVAL;
                }
+       } else if (!clk) {
+               /* unnamed clock from the generic ethernet-phy binding */
+               clk = devm_clk_get_optional_enabled(&phydev->mdio.dev, NULL);
+               if (IS_ERR(clk))
+                       return PTR_ERR(clk);
        }
 
        if (ksz8041_fiber_mode(phydev))