MIPS: ralink: add mt7628an support

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/8031/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-ralink/mt7620.h

@@ -13,6 +13,13 @@
 #ifndef _MT7620_REGS_H_
 #define _MT7620_REGS_H_
 
+enum mt762x_soc_type {
+	MT762X_SOC_UNKNOWN = 0,
+	MT762X_SOC_MT7620A,
+	MT762X_SOC_MT7620N,
+	MT762X_SOC_MT7628AN,
+};
+
 #define MT7620_SYSC_BASE		0x10000000
 
 #define SYSC_REG_CHIP_NAME0		0x00
@@ -27,6 +34,7 @@
 
 #define MT7620_CHIP_NAME0		0x3637544d
 #define MT7620_CHIP_NAME1		0x20203032
+#define MT7628_CHIP_NAME1		0x20203832
 
 #define SYSCFG0_XTAL_FREQ_SEL		BIT(6)
 
@@ -71,6 +79,9 @@
 #define SYSCFG0_DRAM_TYPE_DDR1		1
 #define SYSCFG0_DRAM_TYPE_DDR2		2
 
+#define SYSCFG0_DRAM_TYPE_DDR2_MT7628	0
+#define SYSCFG0_DRAM_TYPE_DDR1_MT7628	1
+
 #define MT7620_DRAM_BASE		0x0
 #define MT7620_SDRAM_SIZE_MIN		2
 #define MT7620_SDRAM_SIZE_MAX		64

arch/mips/ralink/Kconfig

@@ -26,7 +26,7 @@ choice
 		select HW_HAS_PCI
 
 	config SOC_MT7620
-		bool "MT7620"
+		bool "MT7620/8"
 
 endchoice