drivers: ethernet: ksz8081: support 25MHz RMII

Daniel Coffey · Daniel Coffey · commit 1e27f5f92bbc · 2025-07-18T10:18:09.000+01:00
Configure KSZ8081 phy drivers to set strapping mode override
for RMII mode without setting reference clock to 50MHz when
"RMII 25MHz" operation is selected in device tree node.
diff --git a/drivers/ethernet/phy/phy_microchip_ksz8081.c b/drivers/ethernet/phy/phy_microchip_ksz8081.c
@@ -235,7 +235,7 @@ static int phy_mc_ksz8081_static_cfg(const struct device *dev)
 
 	omso &= ~PHY_MC_KSZ8081_OMSO_FACTORY_MODE_MASK &
 		~PHY_MC_KSZ8081_OMSO_NAND_TREE_MASK;
-	if (config->phy_iface == KSZ8081_RMII) {
+	if (config->phy_iface == KSZ8081_RMII || config->phy_iface == KSZ8081_RMII_25MHZ) {
 		omso &= ~PHY_MC_KSZ8081_OMSO_MII_OVERRIDE_MASK;
 		omso |= PHY_MC_KSZ8081_OMSO_RMII_OVERRIDE_MASK;
 	}

Original file line number	Diff line number	Diff line change
`@@ -235,7 +235,7 @@ static int phy_mc_ksz8081_static_cfg(const struct device *dev)`
`235`	`235`
`236`	`236`	`omso &= ~PHY_MC_KSZ8081_OMSO_FACTORY_MODE_MASK &`
`237`	`237`	`~PHY_MC_KSZ8081_OMSO_NAND_TREE_MASK;`
`238`		`- if (config->phy_iface == KSZ8081_RMII) {`
	`238`	`+ if (config->phy_iface == KSZ8081_RMII \|\| config->phy_iface == KSZ8081_RMII_25MHZ) {`
`239`	`239`	`omso &= ~PHY_MC_KSZ8081_OMSO_MII_OVERRIDE_MASK;`
`240`	`240`	`omso \|= PHY_MC_KSZ8081_OMSO_RMII_OVERRIDE_MASK;`
`241`	`241`	`}`