Tegra30: Unknown SKU 177

Tegra30: Unknown SKU 177

[Marcel Ziswiler]

Hi there

Looks like the latest T30MQS-P-A3 embedded SKUs that can e.g. be found 
on Toradex Colibri T30 V1.1D modules are not yet recognised by the 
mainline speedo driver:

[    0.000000] Tegra30: Unknown SKU 177
[    0.000000] fuse_speedo_calib: ATE prog ver 4.0
[    0.000000] Tegra30: CPU Speedo ID 0, Soc Speedo ID 0
[    0.000000] Tegra Revision: A03 SKU: 177 CPU Process: 2 Core Process: 0

Does this have any adverse effects?

If any further information is required just let me know.

Cheers

Marcel

Re: Tegra30: Unknown SKU 177

[Stephen Warren]

On 04/08/2014 08:12 AM, Marcel Ziswiler wrote:
> Hi there
> 
> Looks like the latest T30MQS-P-A3 embedded SKUs that can e.g. be found
> on Toradex Colibri T30 V1.1D modules are not yet recognised by the
> mainline speedo driver:
> 
> [    0.000000] Tegra30: Unknown SKU 177
> [    0.000000] fuse_speedo_calib: ATE prog ver 4.0
> [    0.000000] Tegra30: CPU Speedo ID 0, Soc Speedo ID 0
> [    0.000000] Tegra Revision: A03 SKU: 177 CPU Process: 2 Core Process: 0
> 
> Does this have any adverse effects?

No.

NVIDIA's downstream kernels use SKU (along with other) information to
determine clock/voltage limits, etc. However, we don't have any DVFS
code or aggressive clock settings in mainline at present, so unknown
SKUS won't be a problem. The same goes for mainline U-Boot.

Still, it would be nice to squash the warning for you.

Peter, any chance you could look up the appropriate speedo IDs and fill
in a case for this SKU in tegra30_speedo.c? Is it possible to fill in
all known SKUs?

Re: Tegra30: Unknown SKU 177

[Marcel Ziswiler]

On 04/08/2014 05:25 PM, Stephen Warren wrote:
> On 04/08/2014 08:12 AM, Marcel Ziswiler wrote:
>> Hi there
>>
>> Looks like the latest T30MQS-P-A3 embedded SKUs that can e.g. be found
>> on Toradex Colibri T30 V1.1D modules are not yet recognised by the
>> mainline speedo driver:
>>
>> [    0.000000] Tegra30: Unknown SKU 177
>> [    0.000000] fuse_speedo_calib: ATE prog ver 4.0
>> [    0.000000] Tegra30: CPU Speedo ID 0, Soc Speedo ID 0
>> [    0.000000] Tegra Revision: A03 SKU: 177 CPU Process: 2 Core Process: 0
>>
>> Does this have any adverse effects?
>
> No.
>
> NVIDIA's downstream kernels use SKU (along with other) information to
> determine clock/voltage limits, etc. However, we don't have any DVFS
> code or aggressive clock settings in mainline at present, so unknown
> SKUS won't be a problem. The same goes for mainline U-Boot.
>
> Still, it would be nice to squash the warning for you.
>
> Peter, any chance you could look up the appropriate speedo IDs and fill
> in a case for this SKU in tegra30_speedo.c? Is it possible to fill in
> all known SKUs?

We actually found some T30IQS-P-A3 chips which have an unknown SKU as well:

[    0.000000] Tegra Unknown SKU 176
[    0.000000] Tegra Revision: A03 SKU: 176 CPU Process: 1 Core Process: 0

Any update on any of this?