Now I tried to modify am335x-boneblack.dtx in your dtb-rebuilder (4.4.x
checkedout) and it ended with error
root@beaglebone:/home/debian/dtb-rebuilder# make all
DTC src/arm/am335x-boneblack.dtb
Error: src/arm/am335x-boneblack.dts:39.1-16 Label or path cpu0_opp_table
not found
FATAL ERROR: Syntax error parsing input tree
Makefile:133: recipe for target 'src/arm/am335x-boneblack.dtb' failed
make[1]: *** [src/arm/am335x-boneblack.dtb] Error 1
Makefile:81: recipe for target 'all_arm' failed
make: *** [all_arm] Error 2
Dne pátek 23. března 2018 15:31:37 UTC+1 Filip Kotouček napsal(a):
>
> Thanks for fast reply. I did similar change before. I decompiled
> am335-boneblack.dtb and changed following section to:
>
> oppnitro@1000000000 {
> opp-hz = <0x0 0x3b9aca00>;
> opp-microvolt = <0x1437c8 0x13d044 0x149f4c>;
> opp-supported-hw = <0x06 0x0100>;
> };
>
> But after reboot nothing changed. Obviously you meant to do it some other
> way.
>
>
> Dne pátek 23. března 2018 15:06:16 UTC+1 RobertCNelson napsal(a):
>>
>> On Fri, Mar 23, 2018 at 9:01 AM, Filip Kotouček <[email protected]>
>> wrote:
>> > Hello,
>> >
>> > I have problem with setting cpu freq to 1 GHz. I'm using OSD335x RED
>> board.
>> > I downloaded latest Beaglebone image and installed different kernel. I
>> need
>> > to use UIO driver which is not present in latest kernel.
>>
>> So this is fixed as of yesterday...
>>
>>
>> > Setting frequency via cpufreq-set -f has no effect. I already tried to
>> use
>> > DC power supply, but same result. I found that different kernels has
>> > different settings. Is it possible to change dts to fix it and force
>> cpu to
>> > run @1 GHz?
>>
>> add this node:
>>
>> &cpu0_opp_table {
>> oppnitro@1000000000 {
>> opp-supported-hw = <0x06 0x0100>;
>> };
>> };
>>
>> Regards,
>>
>> --
>> Robert Nelson
>> https://rcn-ee.com/
>>
>
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