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-rw-r--r--arch/mips/include/asm/mach-ralink/mt7620.h1
-rw-r--r--arch/mips/ralink/mt7620.c7
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/mips/include/asm/mach-ralink/mt7620.h b/arch/mips/include/asm/mach-ralink/mt7620.h
index ece7420f6562..a73350b07fdf 100644
--- a/arch/mips/include/asm/mach-ralink/mt7620.h
+++ b/arch/mips/include/asm/mach-ralink/mt7620.h
@@ -72,6 +72,7 @@
#define SYSCFG0_DRAM_TYPE_SDRAM 0
#define SYSCFG0_DRAM_TYPE_DDR1 1
#define SYSCFG0_DRAM_TYPE_DDR2 2
+#define SYSCFG0_DRAM_TYPE_UNKNOWN 3
#define SYSCFG0_DRAM_TYPE_DDR2_MT7628 0
#define SYSCFG0_DRAM_TYPE_DDR1_MT7628 1
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
index 2c623f6bca08..88b82fe21ae6 100644
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -581,11 +581,14 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
(rev & CHIP_REV_ECO_MASK));
cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
- if (is_mt76x8())
+ if (is_mt76x8()) {
dram_type = cfg0 & DRAM_TYPE_MT7628_MASK;
- else
+ } else {
dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) &
SYSCFG0_DRAM_TYPE_MASK;
+ if (dram_type == SYSCFG0_DRAM_TYPE_UNKNOWN)
+ dram_type = SYSCFG0_DRAM_TYPE_SDRAM;
+ }
soc_info->mem_base = MT7620_DRAM_BASE;
if (is_mt76x8())