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QorIQ LS1088A(rdb) increasing the CORE frequency from 1.2 GHz to 1.6 GHz

Hello experts,

I have LS1088a based custom board. When I power on the device, the processor clock configuration in u-boot(boot by SD) is running at 1.2 GHz.

SoC: LS1088AE Rev1.0 (0x87030010)
Clock Configuration:
CPU0(A53):1200 MHz CPU1(A53):1200 MHz CPU2(A53):1200 MHz
CPU3(A53):1200 MHz CPU4(A53):1200 MHz CPU5(A53):1200 MHz
CPU6(A53):1200 MHz CPU7(A53):1200 MHz
Bus: 500 MHz DDR: 1600 MT/s

How do I increase the core frequency to 1.6GHz? If the clock configuration is related to RCW, which document and which section should I review?

Some components were used differently compared to the reference design. If you have any questions about these, I will get back to you immediately.

Thank you.

Re: QorIQ LS1088A(rdb) increasing the CORE frequency from 1.2 GHz to 1.6 GHz

The DDR controller configuration parameters are different when DDR data rate are 2100 MT/s and 1900 MT/s.

Please use QCVS DDRv tool to connect to the target board to do DDR validation and optimization to get DDR controller configuration parameters at 2100 MT/s DDR data rate.

Then use these parameters to modify plat/nxp/soc-ls1088a/ls1088ardb/ddr_init.c according to the file generated by QCVS DDR tool.

You could create a new thread to continue to discuss DDR validation issue.

Re: QorIQ LS1088A(rdb) increasing the CORE frequency from 1.2 GHz to 1.6 GHz

@yipingwang Thank you for your support. CPU runs 1.6GHz and I increased DDR data rate to 1900 MT/s at now.

Clock Configuration:                                                                                                                
       CPU0(A53):1600 MHz  CPU1(A53):1600 MHz  CPU2(A53):1600 MHz                                                                   
       CPU3(A53):1600 MHz  CPU4(A53):1600 MHz  CPU5(A53):1600 MHz                                                                   
       CPU6(A53):1600 MHz  CPU7(A53):1600 MHz                                                                                       
       Bus:      500  MHz  DDR:      1900 MT/s

When I try to 2100 MT/s data rate (MEM_PLL_RAT=21), I got this error:

ERROR:   Found training error(s): 0x2000                                                                      
ERROR:   Error: Waiting for D_INIT timeout.                                                                                         
ERROR:   Writing DDR register(s) failed                                                                                             
ERROR:   Programing DDRC error                                                                                                      
ERROR:   DDR init failed.                                                                                                           
NOTICE:  Incorrect DRAM0 size is defined in platfor_def.h                                                                           
ERROR:   mmap_add_region_check() failed. error -22                                                                                  
ERROR:   mmap_add_region_check() failed. error -22

I looked through the LS1088ARM document a bit, but I couldn't see the exact value ranges. What values do I need to assign to work at a data rate of 2100 MT/s?
Sys PLL Ref clock:100MHz and My current RCW values are as follows:

SYS_PLL_RAT=7 /* 5 */
MEM_PLL_RAT=21 
CGA_PLL1_RAT=16
CGA_PLL2_RAT=16
HWA_CGA_M1_CLK_SEL=2
HWA_CGA_M2_CLK_SEL=1
DDR_REFCLK_SEL=2
DRAM_LAT=1

Re: QorIQ LS1088A(rdb) increasing the CORE frequency from 1.2 GHz to 1.6 GHz

Please configure the following fields in RCW, please refer to "4.8.7.8.1 RCW" in LS1088ARM.

CGA_PLL1_RAT

CGA_PLL2_RAT

For example, Sys PLL Ref clock:100MHz

CGA_PLL1_RAT=16

CGA_PLL2_RAT=16