AIO-3288C 常用命令(1)查看当前CPU，DDR，GPU频率

jpchen

当我们拿到AIO-3288C的机器时候，想看一下机器当前CPU，DDR，GPU跑的是什么频率，还有跑大型游戏时的频率是怎么样的，如果用apk去测有点麻烦，
而且不方便，如下是使用串口输入命令显示当前频率的状态，如果使用adb，则需要输入命令后再执行dmesg
shell@firefly:/ # cat /sys/dvfs/dvfs_tree

[   66.634860] -------------DVFS TREE-----------
[   66.634860]
[   66.634860]
[   66.635065] DVFS TREE:
[   66.635129] |
[   66.635129] |- voltage domain:vd_gpu
[   66.635227] |- current voltage:900000
[   66.635287] |- current regu_mode:UNKNOWN
[   66.635363] |  |
[   66.635363] |  |- power domain:pd_gpu, status = OFF, current volt = 900000, current regu_mode = UNKNOWN
[   66.635487] |  |  |
[   66.635487] |  |  |- clock: clk_gpu current: rate 198000, volt = 900000, enable_dvfs = ENABLE
[   66.635611] |  |  |- clk limit(enable):[198000000, 480000000]; last set rate = 198000
[   66.635686] |  |  |  |- freq = 198000, volt = 900000
[   66.635752] |  |  |  |- freq = 297000, volt = 950000
[   66.635818] |  |  |  |- freq = 417000, volt = 1100000
[   66.635885] |  |  |  |- freq = 480000, volt = 1150000
[   66.635961] |  |  |- clock: clk_gpu current: rate 198000, regu_mode = UNKNOWN, regu_mode_en = 0
[   66.636037] |
[   66.636037] |- voltage domain:vd_logic
[   66.636129] |- current voltage:1150000
[   66.636188] |- current regu_mode:UNKNOWN
[   66.636261] |  |
[   66.636261] |  |- power domain:pd_vio, status = OFF, current volt = 0, current regu_mode = UNKNOWN
[   66.636382] |  |  |
[   66.636382] |  |  |- clock: aclk_vio1 current: rate 592000, volt = 0, enable_dvfs = ENABLE
[   66.636502] |  |  |- clk limit(enable):[99000000, 296000000]; last set rate = 592000
[   66.636578] |  |  |  |- freq = 99000, volt = 1100000
[   66.636645] |  |  |  |- freq = 296000, volt = 1100000
[   66.636719] |  |  |- clock: aclk_vio1 current: rate 592000, regu_mode = UNKNOWN, regu_mode_en = 0
[   66.636807] |  |
[   66.636807] |  |- power domain:pd_ddr, status = OFF, current volt = 1150000, current regu_mode = UNKNOWN
[   66.636929] |  |  |
[   66.636929] |  |  |- clock: clk_ddr current: rate 528000, volt = 1150000, enable_dvfs = ENABLE
[   66.637050] |  |  |- clk limit(enable):[200000000, 528000000]; last set rate = 528000
[   66.637125] |  |  |  |- freq = 200000, volt = 1075000
[   66.637191] |  |  |  |- freq = 300000, volt = 1075000
[   66.637256] |  |  |  |- freq = 456000, volt = 1125000
[   66.637322] |  |  |  |- freq = 528000, volt = 1150000
[   66.637395] |  |  |- clock: clk_ddr current: rate 528000, regu_mode = UNKNOWN, regu_mode_en = 0
[   66.637469] |
[   66.637469] |- voltage domain:vd_arm
[   66.637561] |- current voltage:900000
[   66.637619] |- current regu_mode:UNKNOWN
[   66.637691] |  |
[   66.637691] |  |- power domain:pd_core, status = OFF, current volt = 900000, current regu_mode = UNKNOWN
[   66.637815] |  |  |
[   66.637815] |  |  |- clock: clk_core current: rate 126000, volt = 900000, enable_dvfs = ENABLE
[   66.637935] |  |  |- clk limit(enable):[126000000, 1800000000]; last set rate = 126000
[   66.638010] |  |  |  |- freq = 126000, volt = 900000
[   66.638077] |  |  |  |- freq = 216000, volt = 900000
[   66.638142] |  |  |  |- freq = 312000, volt = 900000
[   66.638207] |  |  |  |- freq = 408000, volt = 900000
[   66.638272] |  |  |  |- freq = 600000, volt = 950000
[   66.638337] |  |  |  |- freq = 696000, volt = 950000
[   66.638402] |  |  |  |- freq = 816000, volt = 1000000
[   66.638468] |  |  |  |- freq = 1008000, volt = 1050000
[   66.638537] |  |  |  |- freq = 1200000, volt = 1100000
[   66.638603] |  |  |  |- freq = 1416000, volt = 1200000
[   66.638670] |  |  |  |- freq = 1512000, volt = 1300000
[   66.638736] |  |  |  |- freq = 1608000, volt = 1350000
[   66.638803] |  |  |  |- freq = 1704000, volt = 1350000
[   66.638869] |  |  |  |- freq = 1800000, volt = 1350000
[   66.638944] |  |  |- clock: clk_core current: rate 126000, regu_mode = UNKNOWN, regu_mode_en = 0
[   66.639016] -------------DVFS TREE END------------


如上打印看出当前GPU频率
clock: clk_gpu current: rate 198000
如上打印看出当前DDR频率
clock: clk_ddr current: rate 528000
如上打印看出当前CPU频率
clock: clk_core current: rate 126000

当然，如果遇到机器有问题的时候需要进行DDR定频或CPU定频，可以通过修改代码，进行CPU定频,其他频道都屏蔽掉
只剩下1.6G频率
kernel/arch/arm/boot/dts/firefly-rk3288-aio-3288c.dts
&clk_core_dvfs_table {
        support-pvtm = <0>;
        pvtm-operating-points = <
                /* KHz    uV         pvtm margin*/
                //126000 900000        25000
                //216000 900000        25000
                //312000 900000        25000
                //408000 900000        25000
                //600000 950000        50000
                //696000 950000        25000
                //816000 1000000        25000
                //1008000 1050000        25000
                //1200000 1100000        25000
                //1416000 1200000        25000
                //1512000 1300000        25000
                1608000 1350000        25000
                //1704000 1350000        25000
                //1800000 1350000        25000
                >;
        status="okay";
};