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Invalid rcw SYSCLK_FREQ value?

Question asked by Zaid Albassam on Apr 7, 2017
Latest reply on Apr 8, 2017 by Zaid Albassam



Im confused about the SYSCLK_FREQ rcw value on the LS1012ARDB. The rcw source is QSPI as the PORSR1 register says.


The "RCW field description" section in the LS1012 RM says the SYSCLK_FREQ value must be 0x258, so that the system clock is 100Mhz (0x258 * 166.667). However on my board the rcw SYSCLK_FREQ shows as 0x96. The RCW is never modified since the board was received.


Now my question, is the value 0x96 for SYSCLK_FREQ on the LS1012A valid? does that mean the SYSCLK is 0x96 * 166.667 = 25 Mhz?


Here is the RCW dump from uboot on my LS1012ARDB:


Clock Configuration:
CPU0(A53):800 MHz
Bus: 250 MHz DDR: 1000 MT/s
Reset Configuration Word (RCW):
00000000: 08000008 00000000 00000000 00000000
00000010: 35080000 c000000c 40000000 00001800
00000020: 00000000 00000000 00000000 000147f1
00000030: 00000000 18c2a120 00000096 00000000