Tegra30: Unknown SKU 177

DISCUSSION Marcel Ziswiler 2 participants 3 messages Apr 8, 2014 – Jun 25, 2014 2 messages not in the archive Tegra architecture support

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Marcel Ziswiler

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2014-04-08 14:12 UTC #0 lore raw

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

A message that is not in the archive (sent off-list or not yet received): 534403CD.8010303-mitwqZ+T+m9Wk0Htik3J/[email protected]

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?

A message that is not in the archive (sent off-list or not yet received): [email protected]

Marcel Ziswiler

author

2014-06-25 14:47 UTC #4 lore raw

Quoted 21 lines · Stephen Warren

Quoted 6 lines · 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:
Quoted 6 lines
[    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.

Quoted 5 lines

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?