Tool/software: Linux
Hi all,
We made a 5728 custom board and want evaluate its power.We did a test compare with EVM board.When I set the cpu governor as powersave,the opp mode is opp_nom,cpu run at 1GHz,The VDD_MPU should be 0.92v according to the AM572x_Power_Spreadsheet
But when I cat /sys/class/regulator/regulator.5/microvolts,the value is 1070000 on our board and 980000 on EVM board.The value is stable at powersave mode,I want to low down the volts of our board,I've checked the DTS file,“opp-microvolt = <1060000 850000 1150000>“,Did that mean the left value is typical,middle one is min and the right one is the max of opp-microvolt?
cpu0_opp_table: opp_table0 {
compatible = "operating-points-v2-ti-cpu";
ti,syscon-efuse = <&scm_wkup 0x20c 0xf80000 19>;
ti,syscon-rev = <&scm_wkup 0x204>;
opp_nom@1000000000 {
opp-hz = /bits/ 64 <1000000000>;
opp-microvolt = <1060000 850000 1150000>,
<1060000 850000 1150000>;
opp-supported-hw = <0xFF 0x01>;
opp-suspend;
};
opp_od@1176000000 {
opp-hz = /bits/ 64 <1176000000>;
opp-microvolt = <1160000 885000 1160000>,
<1160000 885000 1160000>;
opp-supported-hw = <0xFF 0x02>;
};
opp_high@1500000000 {
opp-hz = /bits/ 64 <1500000000>;
opp-microvolt = <1210000 950000 1250000>,
<1210000 950000 1250000>;
opp-supported-hw = <0xFF 0x04>;
};
};
I 've tried to config this property but failed,changing the value of thie property will cause some error.Could u tell me how to low down the VDD_MPU and the rule to config the opp-microvolt property.
Another question is that after i disable one cpu core during the running,the power of our custom board didn't reduce at all.Is reducing cpu core has no effect on power saving?
Any insight on this is welcome.
Thanks