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本帖最后由 shellcode 于 2014-7-28 16:10 编辑
最近研究了一下MT7620N的超频,通过查看源代码,做了些试验:
1)MT7620N 默认580M,最大可超频到780MHz
2)MT7620N 会检查频率设置寄存器的值,限定最大频率600M,也就是说UBoot最多超频到600M,意义不大。
3)超频后发热量有些增大,但没有用温度枪测过。
4)暂时只测试到700M
具体信息:
[ 0.000000] Linux version 3.10.49 (openwrt@tokyo) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r41829) ) #11 Mon Jul 28 14:31:53 CST 2014
[ 0.000000] Board has DDR1
[ 0.000000] Analog PMU set to hw control
[ 0.000000] Digital PMU set to hw control
[ 0.000000] SoC Type: Ralink MT7620N ver:2 eco:3
原来 580M:
[ 0.000000] CPU Clock: 580MHz
[ 0.050000] Calibrating delay loop... 385.84 BogoMIPS (lpj=1929216)
超频 660M:
[ 0.000000] CPU Clock: 660MHz
[ 0.060000] Calibrating delay loop... 439.91 BogoMIPS (lpj=2199552)
超频 680M:
[ 0.000000] CPU Clock: 680MHz
[ 0.060000] Calibrating delay loop... 452.19 BogoMIPS (lpj=2260992)
超频 700M:
[ 0.000000] CPU Clock: 700MHz
[ 0.050000] Calibrating delay loop... 464.48 BogoMIPS (lpj=2322432)
root@netgear:~# cat /proc/cpuinfo
system type : Ralink MT7620N ver:2 eco:3
machine : Netgear WNR614
processor : 0
cpu model : MIPS 24KEc V5.0
BogoMIPS : 464.48
wait instruction : yes
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : yes
hardware watchpoint : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc, 0x0ffb, 0x0ffb]
isa : mips1 mips2 mips32r1 mips32r2
ASEs implemented : mips16 dsp
shadow register sets : 1
kscratch registers : 0
core : 0
VCED exceptions : not available
VCEI exceptions : not available
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