kernel: rtl8367b: add configuration for extif2

Both rtl8367b and rtl8367s have two extended interface
rtl8367rb: 5 port + 2*RGMII/MII
rtl8367s:  5 port + SGMII/HSGMI + RGMII/MII
(?)rtl8367sb:  5 port + 2*RGMII/MII
These interfaces correspond to EXT1 and EXT2 (ports 6 and 7 respectivly).

This patch allow to configure EXT2 in dts-file:

	rtl8367rb {
		compatible = "realtek,rtl8367b";
		cpu_port = <7>;
		realtek,extif2 = <1 0 1 1 1 1 1 1 2>;
		mii-bus = <&mdio0>;
		phy_id = <29>;
	};

Signed-off-by: Serge Vasilugin <[email protected]>
[fix indent, replace magic value, alter commit message]
Signed-off-by: Chuanhong Guo <[email protected]>

target/linux/generic/files/drivers/net/phy/rtl8367b.c

@@ -148,19 +148,36 @@
 	    GENMASK(2 + (_x) * 8, (_x) * 8)
 #define   RTL8367B_DEBUG1_DP_SHIFT(_x)		((_x) * 8)
 
+#define RTL8367B_CHIP_DEBUG2_REG		0x13e2
+#define   RTL8367B_DEBUG2_RG2_DN_MASK		GENMASK(8, 6)
+#define   RTL8367B_DEBUG2_RG2_DN_SHIFT		6
+#define   RTL8367B_DEBUG2_RG2_DP_MASK		GENMASK(5, 3)
+#define   RTL8367B_DEBUG2_RG2_DP_SHIFT		3
+#define   RTL8367B_DEBUG2_DRI_EXT2_RG		BIT(2)
+#define   RTL8367B_DEBUG2_DRI_EXT2		BIT(1)
+#define   RTL8367B_DEBUG2_SLR_EXT2		BIT(0)
+
 #define RTL8367B_DIS_REG			0x1305
 #define   RTL8367B_DIS_SKIP_MII_RXER(_x)	BIT(12 + (_x))
 #define   RTL8367B_DIS_RGMII_SHIFT(_x)		(4 * (_x))
 #define   RTL8367B_DIS_RGMII_MASK		0x7
 
-#define RTL8367B_EXT_RGMXF_REG(_x)		(0x1306 + (_x))
+#define RTL8367B_DIS2_REG			0x13c3
+#define   RTL8367B_DIS2_SKIP_MII_RXER_SHIFT	4
+#define   RTL8367B_DIS2_SKIP_MII_RXER		0x10
+#define   RTL8367B_DIS2_RGMII_SHIFT		0
+#define   RTL8367B_DIS2_RGMII_MASK		0xf
+
+#define RTL8367B_EXT_RGMXF_REG(_x)		\
+	  ((_x) == 2 ? 0x13c5 : 0x1306 + (_x))
 #define   RTL8367B_EXT_RGMXF_DUMMY0_SHIFT	5
 #define   RTL8367B_EXT_RGMXF_DUMMY0_MASK	0x7ff
 #define   RTL8367B_EXT_RGMXF_TXDELAY_SHIFT	3
 #define   RTL8367B_EXT_RGMXF_TXDELAY_MASK	1
 #define   RTL8367B_EXT_RGMXF_RXDELAY_MASK	0x7
 
-#define RTL8367B_DI_FORCE_REG(_x)		(0x1310 + (_x))
+#define RTL8367B_DI_FORCE_REG(_x)		\
+	  ((_x) == 2 ? 0x13c4 : 0x1310 + (_x))
 #define   RTL8367B_DI_FORCE_MODE		BIT(12)
 #define   RTL8367B_DI_FORCE_NWAY		BIT(7)
 #define   RTL8367B_DI_FORCE_TXPAUSE		BIT(6)
@@ -780,6 +797,17 @@ static int rtl8367b_extif_set_mode(struct rtl8366_smi *smi, int id,
 					RTL8367B_DEBUG1_DP_MASK(id),
 				(7 << RTL8367B_DEBUG1_DN_SHIFT(id)) |
 					(7 << RTL8367B_DEBUG1_DP_SHIFT(id)));
+		} else {
+			REG_RMW(smi, RTL8367B_CHIP_DEBUG1_REG,
+				RTL8367B_DEBUG2_DRI_EXT2 |
+					RTL8367B_DEBUG2_DRI_EXT2_RG |
+					RTL8367B_DEBUG2_SLR_EXT2 |
+					RTL8367B_DEBUG2_RG2_DN_MASK |
+					RTL8367B_DEBUG2_RG2_DP_MASK,
+				RTL8367B_DEBUG2_DRI_EXT2_RG |
+					RTL8367B_DEBUG2_SLR_EXT2 |
+					(7 << RTL8367B_DEBUG2_RG2_DN_SHIFT) |
+					(7 << RTL8367B_DEBUG2_RG2_DP_SHIFT));
 		}
 		break;
 
@@ -810,9 +838,14 @@ static int rtl8367b_extif_set_mode(struct rtl8366_smi *smi, int id,
 		return -EINVAL;
 	}
 
-	REG_RMW(smi, RTL8367B_DIS_REG,
-		RTL8367B_DIS_RGMII_MASK << RTL8367B_DIS_RGMII_SHIFT(id),
-		mode << RTL8367B_DIS_RGMII_SHIFT(id));
+	if (id <= 1)
+		REG_RMW(smi, RTL8367B_DIS_REG,
+			RTL8367B_DIS_RGMII_MASK << RTL8367B_DIS_RGMII_SHIFT(id),
+			mode << RTL8367B_DIS_RGMII_SHIFT(id));
+	else
+		REG_RMW(smi, RTL8367B_DIS2_REG,
+			RTL8367B_DIS2_RGMII_MASK << RTL8367B_DIS2_RGMII_SHIFT,
+			mode << RTL8367B_DIS2_RGMII_SHIFT);
 
 	return 0;
 }
@@ -956,6 +989,10 @@ static int rtl8367b_setup(struct rtl8366_smi *smi)
 		err = rtl8367b_extif_init_of(smi, 1, "realtek,extif1");
 		if (err)
 			return err;
+
+		err = rtl8367b_extif_init_of(smi, 2, "realtek,extif2");
+		if (err)
+			return err;
 	} else {
 		err = rtl8367b_extif_init(smi, 0, pdata->extif0_cfg);
 		if (err)