netdev - [PATCH net-next 06/16] net: stmmac: mediatek: simplify set

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Message-Id: <E1vHNS1-0000000DkSP-2gnP@rmk-PC.armlinux.org.uk>
Date: Fri, 07 Nov 2025 14:28:29 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"David S. Miller" <davem@...emloft.net>,
	Emil Renner Berthing <kernel@...il.dk>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jerome Brunet <jbrunet@...libre.com>,
	Keguang Zhang <keguang.zhang@...il.com>,
	Kevin Hilman <khilman@...libre.com>,
	linux-amlogic@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-mips@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Minda Chen <minda.chen@...rfivetech.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	netdev@...r.kernel.org,
	Nobuhiro Iwamatsu <nobuhiro.iwamatsu.x90@...l.toshiba>,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 06/16] net: stmmac: mediatek: simplify
 set_interface() methods

Use the phy_intf_sel field value when deciding what other options to
apply for the configuration register.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../ethernet/stmicro/stmmac/dwmac-mediatek.c  | 50 +++++--------------
 1 file changed, 12 insertions(+), 38 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index 0f32732efb75..1f2d7d19ca56 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -110,26 +110,13 @@ static const char * const mt8195_dwmac_clk_l[] = {
 static int mt2712_set_interface(struct mediatek_dwmac_plat_data *plat,
 				u8 phy_intf_sel)
 {
-	int rmii_clk_from_mac = plat->rmii_clk_from_mac ? RMII_CLK_SRC_INTERNAL : 0;
-	int rmii_rxc = plat->rmii_rxc ? RMII_CLK_SRC_RXC : 0;
-	u32 intf_val;
+	u32 intf_val = phy_intf_sel;
 
-	intf_val = phy_intf_sel;
-
-	/* select phy interface in top control domain */
-	switch (plat->phy_mode) {
-	case PHY_INTERFACE_MODE_RMII:
-		intf_val |= rmii_rxc | rmii_clk_from_mac;
-		break;
-	case PHY_INTERFACE_MODE_MII:
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-		break;
-	default:
-		dev_err(plat->dev, "phy interface not supported\n");
-		return -EINVAL;
+	if (phy_intf_sel == PHY_INTF_SEL_RMII) {
+		if (plat->rmii_clk_from_mac)
+			intf_val |= RMII_CLK_SRC_INTERNAL;
+		if (plat->rmii_rxc)
+			intf_val |= RMII_CLK_SRC_RXC;
 	}
 
 	regmap_write(plat->peri_regmap, PERI_ETH_PHY_INTF_SEL, intf_val);
@@ -289,26 +276,13 @@ static const struct mediatek_dwmac_variant mt2712_gmac_variant = {
 static int mt8195_set_interface(struct mediatek_dwmac_plat_data *plat,
 				u8 phy_intf_sel)
 {
-	int rmii_clk_from_mac = plat->rmii_clk_from_mac ? MT8195_RMII_CLK_SRC_INTERNAL : 0;
-	int rmii_rxc = plat->rmii_rxc ? MT8195_RMII_CLK_SRC_RXC : 0;
-	u32 intf_val;
+	u32 intf_val = FIELD_PREP(MT8195_ETH_INTF_SEL, phy_intf_sel);
 
-	intf_val = FIELD_PREP(MT8195_ETH_INTF_SEL, phy_intf_sel);
-
-	/* select phy interface in top control domain */
-	switch (plat->phy_mode) {
-	case PHY_INTERFACE_MODE_RMII:
-		intf_val |= rmii_rxc | rmii_clk_from_mac;
-		break;
-	case PHY_INTERFACE_MODE_MII:
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-		break;
-	default:
-		dev_err(plat->dev, "phy interface not supported\n");
-		return -EINVAL;
+	if (phy_intf_sel == PHY_INTF_SEL_RMII) {
+		if (plat->rmii_clk_from_mac)
+			intf_val |= MT8195_RMII_CLK_SRC_INTERNAL;
+		if (plat->rmii_rxc)
+			intf_val |= MT8195_RMII_CLK_SRC_RXC;
 	}
 
 	/* MT8195 only support external PHY */
-- 
2.47.3