[PATCH RFC net-next 15/15] net: stmmac: rk: rk3528: gmac0 only supports RMII

Russell King (Oracle) rmk+kernel at armlinux.org.uk
Mon Dec 1 06:51:59 PST 2025


RK3528 gmac0 dtsi contains:

                gmac0: ethernet at ffbd0000 {
                        phy-handle = <&rmii0_phy>;
                        phy-mode = "rmii";

                        mdio0: mdio {
                                rmii0_phy: ethernet-phy at 2 {
                                        phy-is-integrated;
                                };
                        };
                };

This follows the same pattern as rk3328, where this gmac instance
only supports RMII. Disable RGMII in phylink's supported_interfaces
mask for this gmac instance.

Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index c04a115beb98..290fd5f06267 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -701,6 +701,7 @@ static int rk3528_init(struct rk_priv_data *bsp_priv)
 	case 0:
 		bsp_priv->speed_grf_reg = RK3528_VO_GRF_GMAC_CON;
 		bsp_priv->rmii_clk_sel_mask = BIT_U16(3);
+		bsp_priv->supports_rgmii = false;
 		return 0;
 
 	case 1:
-- 
2.47.3




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