[U-Boot] I2C Register

Ronny D
2010-02-05T08:22:59Z

Stefan,

My Customized ppc4xx I2C interface provides two I2C controllers. so i think we will have to use Hard I2C ( because i will have to modify the same in kernel too).

Shall i used the same i2c driver from u-boot by modifying the register or write my own driver for it?

i found the ppc4xx_i2c structure, but can i get the information about the each parameter or register used in that structure.

~Ronny

--- On Fri, 5/2/10, Stefan Roese <sr@denx.de> wrote:

From: Stefan Roese <sr@denx.de>
Subject: Re: I2C Register
To: "Ronny D" <ronny_d37@yahoo.com>
Cc: u-boot at lists.denx.de
Date: Friday, 5 February, 2010, 7:24 AM

On Friday 05 February 2010 07:41:27 Ronny D wrote:
> It is not a normal AMCC PPC4xx, its a customized PPC4xx chip. so I2C code
>? wont work for me as it is.

I see. So you should probably not base your I2C driver code on the PPC4xx
code. Perhaps you could use the soft_i2c code, where you only need some GPIO's
to control the I2C signals.

> i will have to map my register with i2c register used by u-boot.
>
> Now i have downloaded latest u-boot version(Jan 25 2010 12:37 Link
>? u-boot-latest.tar.bz2 -> u-boot-2009.11.1.tar.bz2) from ftp.
>
> still ppc4xx_i2c structure i could not found.

That's because the source code on the FTP server is reflecting the last
release version. Please use the latest version from the git repository
instead:

http://git.denx.de/?p=u-boot.git;a=summary

There is also the possibility to download a snapshort in this web page, if you
can't use git for some reason.

Cheers,
Stefan

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