From: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Date: Wed, 4 Feb 2026 09:14:33 +0000 (+0000)
Subject: net: stmmac: rk: rk3528: gmac0 only supports RMII
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d7d92037cbd82ac6581ef9c97f14d2432f921fba;p=thirdparty%2Fkernel%2Flinux.git

net: stmmac: rk: rk3528: gmac0 only supports RMII

RK3528 gmac0 dtsi contains:

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

                        mdio0: mdio {
                                rmii0_phy: ethernet-phy@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@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/E1vnYy1-00000007hp3-0hKm@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 8dd2122fd9b1..4099cbc5d0de 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -728,6 +728,7 @@ static int rk3528_init(struct rk_priv_data *bsp_priv)
 	case 0:
 		bsp_priv->clock_grf_reg = RK3528_VO_GRF_GMAC_CON;
 		bsp_priv->clock.rmii_clk_sel_mask = BIT_U16(3);
+		bsp_priv->supports_rgmii = false;
 		return 0;
 
 	case 1: