[PATCH net-next 2/6] net: stmmac: mediatek: add PERI_ETH_CTRLx register offset in platform data

[Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>]

In preparation of newer SoC support, that use like MT8195 the Ethernet
control registers from the peripheral configuration syscon but at a
different base offset, add a new base offset in the variant platform
data to access the PERI_ETH_CTRLx registers and use it in implemented
methods.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   | 28 +++++++++++++++-------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index 30ae0dba7fff..0cabab4fd89a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -37,7 +37,9 @@
 #define ETH_FINE_DLY_RXC	BIT(0)
 
 /* Peri Configuration register for mt8195 */
-#define MT8195_PERI_ETH_CTRL0		0xFD0
+#define MT8195_PERI_ETH_CTRL_BASE	0xFD0
+
+#define MT8195_PERI_ETH_CTRL0		0x0
 #define MT8195_RMII_CLK_SRC_INTERNAL	BIT(28)
 #define MT8195_RMII_CLK_SRC_RXC		BIT(27)
 #define MT8195_ETH_INTF_SEL		GENMASK(26, 24)
@@ -47,7 +49,7 @@
 #define MT8195_DLY_GTXC_ENABLE		BIT(5)
 #define MT8195_DLY_GTXC_STAGES		GENMASK(4, 0)
 
-#define MT8195_PERI_ETH_CTRL1		0xFD4
+#define MT8195_PERI_ETH_CTRL1		0x4
 #define MT8195_DLY_RXC_INV		BIT(25)
 #define MT8195_DLY_RXC_ENABLE		BIT(18)
 #define MT8195_DLY_RXC_STAGES		GENMASK(17, 13)
@@ -55,7 +57,7 @@
 #define MT8195_DLY_TXC_ENABLE		BIT(5)
 #define MT8195_DLY_TXC_STAGES		GENMASK(4, 0)
 
-#define MT8195_PERI_ETH_CTRL2		0xFD8
+#define MT8195_PERI_ETH_CTRL2		0x8
 #define MT8195_DLY_RMII_RXC_INV		BIT(25)
 #define MT8195_DLY_RMII_RXC_ENABLE	BIT(18)
 #define MT8195_DLY_RMII_RXC_STAGES	GENMASK(17, 13)
@@ -95,6 +97,7 @@ struct mediatek_dwmac_variant {
 
 	u32 rx_delay_max;
 	u32 tx_delay_max;
+	u32 peri_eth_ctrl_offset;
 	u8 dma_bit_mask;
 };
 
@@ -277,6 +280,7 @@ static int mt8195_set_interface(struct mediatek_dwmac_plat_data *plat,
 				u8 phy_intf_sel)
 {
 	u32 intf_val = FIELD_PREP(MT8195_ETH_INTF_SEL, phy_intf_sel);
+	u32 reg_offset = plat->variant->peri_eth_ctrl_offset;
 
 	if (phy_intf_sel == PHY_INTF_SEL_RMII) {
 		if (plat->rmii_clk_from_mac)
@@ -288,7 +292,9 @@ static int mt8195_set_interface(struct mediatek_dwmac_plat_data *plat,
 	/* MT8195 only support external PHY */
 	intf_val |= MT8195_EXT_PHY_MODE;
 
-	regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL0, intf_val);
+	regmap_write(plat->peri_regmap,
+		     reg_offset + MT8195_PERI_ETH_CTRL0,
+		     intf_val);
 
 	return 0;
 }
@@ -313,8 +319,9 @@ static void mt8195_delay_stage2ps(struct mediatek_dwmac_plat_data *plat)
 
 static int mt8195_set_delay(struct mediatek_dwmac_plat_data *plat)
 {
-	struct mac_delay_struct *mac_delay = &plat->mac_delay;
 	u32 gtxc_delay_val = 0, delay_val = 0, rmii_delay_val = 0;
+	struct mac_delay_struct *mac_delay = &plat->mac_delay;
+	u32 reg_offset = plat->variant->peri_eth_ctrl_offset;
 
 	mt8195_delay_ps2stage(plat);
 
@@ -399,14 +406,18 @@ static int mt8195_set_delay(struct mediatek_dwmac_plat_data *plat)
 	}
 
 	regmap_update_bits(plat->peri_regmap,
-			   MT8195_PERI_ETH_CTRL0,
+			   reg_offset + MT8195_PERI_ETH_CTRL0,
 			   MT8195_RGMII_TXC_PHASE_CTRL |
 			   MT8195_DLY_GTXC_INV |
 			   MT8195_DLY_GTXC_ENABLE |
 			   MT8195_DLY_GTXC_STAGES,
 			   gtxc_delay_val);
-	regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL1, delay_val);
-	regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL2, rmii_delay_val);
+	regmap_write(plat->peri_regmap,
+		     reg_offset + MT8195_PERI_ETH_CTRL1,
+		     delay_val);
+	regmap_write(plat->peri_regmap,
+		     reg_offset + MT8195_PERI_ETH_CTRL2,
+		     rmii_delay_val);
 
 	mt8195_delay_stage2ps(plat);
 
@@ -421,6 +432,7 @@ static const struct mediatek_dwmac_variant mt8195_gmac_variant = {
 	.rx_delay_max = 9280,
 	.tx_delay_max = 9280,
 	.dma_bit_mask = 35,
+	.peri_eth_ctrl_offset = MT8195_PERI_ETH_CTRL_BASE,
 };
 
 static int mediatek_dwmac_config_dt(struct mediatek_dwmac_plat_data *plat)

-- 
2.55.0