tree 643fe0e079b6f415d59bfd5b7e05509ac0c7fb23
parent 68f132b88bb24277ee34d5c3c94d16c26d7d4545
author Jacky Bai <ping.bai@nxp.com> 1643099698 +0800
committer Jacky Bai <ping.bai@nxp.com> 1709015394 +0800

feat(imx8ulp): enable the DDR frequency scaling support

Enable the DDR frequency scaling support on i.MX8ULP.
Normally, the freq_index define is as below:

 0: boot frequency;
 1: low frequency(PLL bypassed);
 2. high frequency(PLL ON).

Currently, DDR DFS only do frequency switching between
Low freq and high freq.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Change-Id: I3acd8bdf75e2dd6dff645b9f597dcfc0a756c428