FAQs
English (US) 日本語 | Japanese 中文 | Chinese (Simplified)

ddr clock configuration through synchronous mode from external oscillator not from CPU in u-boot

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 

ddr clock configuration through synchronous mode from external oscillator not from CPU in u-boot

‎07-28-2015 09:39 PM
712 Views
shubhasingh
Contributor I

Hi,

We are having a P1021 based custom board, in which the clock input to DDR is through ddr synchronous mode from external oscillator not from CPU, i want to support this in U-boot.

I am not getting a clue where to make this change in u-boot so that it supports DDR clocking from external oscillator. Can some body please point me out on this.

Regards,

Shubha

Labels (1)
Labels
0 Kudos
Reply
2 Replies

‎08-05-2015 03:04 AM
587 Views
shubhasingh
Contributor I

Thanks.

0 Kudos
Reply

‎07-30-2015 07:34 AM
587 Views
Bulat
NXP Employee
NXP Employee

Clocking mode of the DDR is set on the board level, u-boot does not require any special change. Specifically the user should set proper 'cfg_ddr_pll[0:2]' POR configuration field in accordance with the input clock source (frequency), see section 4.5.3.2 of the Ref Manual for details.

Regards,

Bulat

0 Kudos
Reply