openwrt/target/linux/ramips/patches-3.18/0301-mt7688-detect.patch

--- a/arch/mips/include/asm/mach-ralink/mt7620.h
+++ b/arch/mips/include/asm/mach-ralink/mt7620.h
@@ -17,6 +17,7 @@
 
 #define SYSC_REG_CHIP_NAME0		0x00
 #define SYSC_REG_CHIP_NAME1		0x04
+#define SYSC_REG_EFUSE_CFG		0x08
 #define SYSC_REG_CHIP_REV		0x0c
 #define SYSC_REG_SYSTEM_CONFIG0		0x10
 #define SYSC_REG_SYSTEM_CONFIG1		0x14
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -43,6 +43,9 @@
 #define CLKCFG_FFRAC_MASK	0x001f
 #define CLKCFG_FFRAC_USB_VAL	0x0003
 
+/* EFUSE bits */
+#define EFUSE_MT7688		0x100000
+
 /* does the board have sdram or ddram */
 static int dram_type;
 
@@ -391,7 +394,7 @@
 #define RINT(x)		((x) / 1000000)
 #define RFRAC(x)	(((x) / 1000) % 1000)
 
-	if (ralink_soc == MT762X_SOC_MT7628AN) {
+	if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688) {
 		if (xtal_rate == MHZ(40))
 			cpu_rate = MHZ(580);
 		else
@@ -436,7 +439,8 @@
  	ralink_clk_add("10000e00.uart2", periph_rate);
 	ralink_clk_add("10180000.wmac", xtal_rate);
 
-	if (IS_ENABLED(CONFIG_USB) && ralink_soc != MT762X_SOC_MT7628AN) {
+	if (IS_ENABLED(CONFIG_USB) &&
+		(ralink_soc == MT762X_SOC_MT7620A || ralink_soc == MT762X_SOC_MT7620N)) {
 		/*
 		 * When the CPU goes into sleep mode, the BUS clock will be too low for
 		 * USB to function properly
@@ -536,8 +540,15 @@
 #endif
 		}
 	} else if (n0 == MT7620_CHIP_NAME0 && n1 == MT7628_CHIP_NAME1) {
-		ralink_soc = MT762X_SOC_MT7628AN;
-		name = "MT7628AN";
+		u32 efuse = __raw_readl(sysc + SYSC_REG_EFUSE_CFG);
+
+		if (efuse & EFUSE_MT7688) {
+			ralink_soc = MT762X_SOC_MT7688;
+			name = "MT7688";
+		} else {
+			ralink_soc = MT762X_SOC_MT7628AN;
+			name = "MT7628AN";
+		}
 		soc_info->compatible = "ralink,mt7628an-soc";
 	} else {
 		panic("mt762x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
@@ -551,13 +562,13 @@
 
 	cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
 
-	if (ralink_soc == MT762X_SOC_MT7628AN)
+	if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688)
 		dram_type = ((cfg0&0x00000001) == 0x00000001)?SYSCFG0_DRAM_TYPE_DDR1_MT7628:SYSCFG0_DRAM_TYPE_DDR2_MT7628;
 	else
 		dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) & SYSCFG0_DRAM_TYPE_MASK;
 
 	soc_info->mem_base = MT7620_DRAM_BASE;
-	if (ralink_soc == MT762X_SOC_MT7628AN)
+	if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688)
 		mt7628_dram_init(soc_info);
 	else
 		mt7620_dram_init(soc_info);
@@ -570,7 +581,7 @@
 	pr_info("Digital PMU set to %s control\n",
 		(pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));
 
-	if (ralink_soc == MT762X_SOC_MT7628AN)
+	if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688)
 		rt2880_pinmux_data = mt7628an_pinmux_data;
 	else
 		rt2880_pinmux_data = mt7620a_pinmux_data;
--- a/arch/mips/include/asm/mach-ralink/ralink_regs.h
+++ b/arch/mips/include/asm/mach-ralink/ralink_regs.h
@@ -24,6 +24,7 @@
 	MT762X_SOC_MT7620N,
 	MT762X_SOC_MT7621AT,
 	MT762X_SOC_MT7628AN,
+	MT762X_SOC_MT7688,
 };
 extern enum ralink_soc_type ralink_soc;
 
--- a/drivers/net/ethernet/ralink/esw_rt3052.c
+++ b/drivers/net/ethernet/ralink/esw_rt3052.c
@@ -611,7 +611,7 @@
 		rt305x_mii_write(esw, 0, 29, 0x598b);
 		/* select local register */
 		rt305x_mii_write(esw, 0, 31, 0x8000);
-	} else if (ralink_soc == MT762X_SOC_MT7628AN) {
+	} else if (ralink_soc == MT762X_SOC_MT7628AN || ralink_soc == MT762X_SOC_MT7688) {
 		int i;
 //		u32 phy_val;
 		u32 val;
@@ -1042,7 +1042,7 @@
 	int shift = attr->id == RT5350_ESW_ATTR_PORT_TR_GOOD ? 0 : 16;
 	u32 reg;
 
-	if ((ralink_soc != RT305X_SOC_RT5350) && (ralink_soc != MT762X_SOC_MT7628AN))
+	if ((ralink_soc != RT305X_SOC_RT5350) && (ralink_soc != MT762X_SOC_MT7628AN) && (ralink_soc != MT762X_SOC_MT7688))
 		return -EINVAL;
 
 	if (idx < 0 || idx >= RT305X_ESW_NUM_LANWAN)