From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Roese <sr@denx.de>
Date: Wed, 03 Apr 2013 19:08:20 +0200
Subject: [U-Boot] PPC4XX Custom Board - Failing to read I2C
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	<515B7D21.6040607@denx.de>
	<1365005723957-151427.post@n7.nabble.com>
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On 03.04.2013 18:15, txcotrader wrote:
> Thanks Stefan, great suggestion, I failed to copy those configurations into
> my original message.
> 
>  /*-----------------------------------------------------------------------
>   * DDR SDRAM
>   *----------------------------------------------------------------------*/
>  #if !defined(CONFIG_NAND_U_BOOT)
>  #define CONFIG_SPD_EEPROM                       1               /* Use SPD
> EEPROM for setup */
>  #define CONFIG_DDR_ECC                          1               /* with ECC
> support */
>  
>  /* SPD i2c spd addresses */
>  #define SPD_EEPROM_ADDRESS                      {IIC0_DIMM0_ADDR}
>  #define IIC0_DIMM0_ADDR                         0x50
>  #define IIC0_DIMM1_ADDR                         0x52
> 
> I am questioning my bus configurations... I haven't hooked up the scope yet,
> but I don't think data is hitting the bus. I don't see any areas to
> configure the I2C bus besides the board configuration file. Any suggestions?

Are you sure that 0x50 is correct? I suggest you try this instead:

#define SPD_EEPROM_ADDRESS	{ IIC0_DIMM0_ADDR, IIC0_DIMM1_ADDR }

Thanks,
Stefan