[Bug 1941622] Re: [SRU] Bump unmatched CPU clock rate to 1.2 GHz

[Łukasz Zemczak]

The change looks good, but since I'm not familiar with these u-boot
parts, I'd like to know the following before proceeding:

1) I assume this is a runtime change that happens after updating the u-boot packages on an installed SiFive drive, right? Does the change happen instantly after upgrade of the package? Or on next reboot?
2) The test case is not too clear about how one checks if the patch is in effect or not. How can one confirm that the effective CPU clock speed is now different? Is it just a matter of `cat /proc/cpuinfo`?

Can you please update the description with these clarifications?

** Changed in: u-boot (Ubuntu Focal)
       Status: In Progress => Incomplete

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Title:
  [SRU] Bump unmatched CPU clock rate to 1.2 GHz

Status in u-boot package in Ubuntu:
  Fix Released
Status in u-boot source package in Focal:
  Incomplete

Bug description:
  [Impact]

  Bump SiFive Unmatched CPU clock rate from 1.0 GHz to 1.2 GHz as used
  by upstream U-Boot.

  This is the maximum frequency that according to SiFive is stable on
  all boards.

  [Test Plan]

   * System with these patches boots, operates normally without
  overheating. CPU clock speed is increased form 1.0 GHz to 1.2 GHz.

  [Where problems could occur]

   * Overheating, instability, panics. (Should not occur according to
  the board vendor)

  [Other Info]
   
   * wgrant & multiple SiFive forum users report even 1.5 GHz to be stable

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