[U-Boot] I2C Register

Stefan Roese
2010-02-04T14:53:07Z

Hi Ronny,

On Thursday 04 February 2010 15:30:35 Ronny D wrote:
> I am trying to read SPD data from dimm though I2c.
> as the board that i am using it has different I2c register so it is
> difficult to match with the register used in u-boot.

Which platform are you using? PPC4xx? Or something else?

> Can i get the
> information about
> /*-------------------------------------------------------------------------
> ----
>
> | IIC Register Offsets
>
> '--------------------------------------------------------------------------
> --*/ #define IICMDBUF 0x00
> #define IICSDBUF 0x02
> #define IICLMADR 0x04
> #define IICHMADR 0x05
> #define IICCNTL 0x06
> #define IICMDCNTL 0x07
> #define IICSTS 0x08
> #define IICEXTSTS 0x09
> #define IICLSADR 0x0A
> #define IICHSADR 0x0B
> #define IICCLKDIV 0x0C
> #define IICINTRMSK 0x0D
> #define IICXFRCNT 0x0E
> #define IICXTCNTLSS 0x0F
> #define IICDIRECTCNTL 0x10
>
> these register to that it will be easy for me to match with the register
> that i am using.

These defines above are not available in U-Boot any more. I switched to using
a struct s while ago:

struct ppc4xx_i2c {
u8 mdbuf;
u8 res1;
u8 sdbuf;
...

You are using PPC4xx, right?