[U-Boot] PPC4XX Custom Board - Failing to read I2C

[txcotrader]

Hello,

I'm looking for some direction. I'm trying to update my version of u-boot
for a custom board based off of the PPC460SX. I'm struggling to understand
why I cannot get past reading the I2C on the DIMM. I'm receiving this error:

CPU:   AMCC PowerPC 460SX Rev. A at 231.291 MHz (PLB=33 OPB=16 EBC=4)
       Security support
       Bootstrap Option A - Boot ROM Location EBC (8 bits)
       Internal PCI arbiter enabled
       32 kB I-Cache 32 kB D-Cache
Board: x Processor Board - AMCC 460SX

*** DEBUG: NDFC register configurations ***
SDR0_EBC = 0x30011ffe
SDR0_NFC0 = 0x411b0683
SDR0_PFC1 = 0x41120000
EBC0_B0CR = 0xff08a000
EBC0_B0AP = 0x10055e00
EBC0_B1CR = 0xd1018000
EBC0_B1AP = 0x018003c0
EBC0_B2CR = 0xd0018000
EBC0_B2AP = 0x03804240
EBC0_B3CR = 0x00000000
EBC0_B3AP = 0x00000000

SDR0_SDSTP0 = 0xb40b3149
SDR0_SDSTP1 = 0xe8000210
SDR0_SDSTP2 = 0x00002030
SDR0_SDSTP3 = 0xc3001380

CPR0_PLL0C = 0x40000340
CPR0_PLL1C = 0x40000340
CPR0_PLL0D = 0xb3010600
CPR0_PLL1D = 0x00010600
CPR0_PLBD  = 0x04000000
CPR0_OPBD  = 0x02000000
CPR0_PERD  = 0x01000000
CPR0_ICFG  = 0x00000000
CPR0_DDRD  = 0x02000000

L2:    512KB
EBC_BXAP_FPGA: 03804240
EBC_BXCR_FPGA_CS2: d0018000
I2C:   ready
DRAM:  
spd_read(0x50) returned 0
spd_read(0x50) returned 0
DIMM slot 0: Not populated
ERROR - No memory installed. Install a DDR-SDRAM DIMM.

I2C configs:

#define CONFIG_I2C_MULTI_BUS                    1
#define CONFIG_SYS_I2C_SPEED                    400000  /* I2C speed           
*/

/*#define CONFIG_SYS_I2C_MULTI_EEPROMS*/
#define CONFIG_SYS_I2C_EEPROM_ADDR              (0xa8>>1)
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN          1
#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS       5
#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS   10

/* I2C bootstrap EEPROM */
#define IIC0_BOOTPROM_ADDR                      0x54
#define IIC0_PLX_FPGA_ADDR                      0x69
#define IIC0_PLX_PPC_ADDR                       0x6A

/* I2C bootstrap EEPROM */
#define CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR       0x52
#define CONFIG_4xx_CONFIG_I2C_EEPROM_OFFSET     0
#define CONFIG_4xx_CONFIG_BLOCKSIZE             16

/* RTC configuration */
#define CONFIG_RTC_DS1337                       1
#define CONFIG_SYS_I2C_RTC_ADDR                 0x68


I found myself digging pretty deep into i2c_transfer.c but I think there is
a configuration error. Any advice would be greatly appreciated.

Thank you



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