0003369: On i.MX6UL/ULL, add support for speed limitation to 528 MHz

ID	Project	Category	View Status	Date Submitted	Last Update

0003369	NBootiMX6	NBoot	public	2018-02-23 16:19	2018-03-09 15:33

Reporter	Keller	Assigned To
Priority	normal	Severity	feature	Reproducibility	N/A
Status	resolved	Resolution	fixed
Product Version	V35
Target Version	V36	Fixed in Version	V36

Summary	0003369: On i.MX6UL/ULL, add support for speed limitation to 528 MHz
Description	We 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.