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IDProjectCategoryView StatusLast Update
0003369NBootiMX6NBootpublic2018-03-09 15:33
ReporterKeller Assigned To 
Status resolvedResolutionfixed 
Product VersionV35 
Target VersionV36Fixed in VersionV36 
Summary0003369: On i.MX6UL/ULL, add support for speed limitation to 528 MHz
DescriptionWe want to use CPUs with 800 or 900 MHz also for projects that are meant for 528 MHz. Therefore we have a config jumper on efusA7UL that tells the board to limit the clock frequency to at most 528 MHz. This information has to be read in NBoot and passed to the main bootloader in chFeatures2.

U-Boot has implemented this already as Bit 6:

#define FEAT2_SPEED (1<<6) /* 0: Full speed, 1: Limited speed */

This is a rather generic definition and can also be used for other speeds on other CPUs or boards if necessary.


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