On Fri, 8 Sep 2006 13:00:58 -0400 "Kuffner Cory" <CKuffner at LIO.AACISD.com> wrote:
> Hello all, > > Does anyone know how to use the I2C module for the MPC8272?? We are > attempting to enable it by following code written for a bareboard system and > converting it into a kernel module (2.6.11 Kernel), but nothing happens on > our SDA and SCL data lines. The parameter ram is kind of tricky to set up, > but I beleive we have everything pointing where it should. To write to the > IMM we are using the ioremap function with ioread and iowrite, we can write > to the ports so I don't think there is an issue writing to memory, but I'm > new to embedded linux. Has anyone ever used the I2C controller in one of > freescale's chips or just a good understanding of I2C modules in embedded > linux?? I think all the chips have the same I2C interface....so it should be > the same set up for MPC8250, 8255, 8260, etc. > I am recalling i2c functional on 8272, but no other details unfortunately. IIRC, i2c-mpc.c did the magic with some minor intervention. Barely, to access immr it is ioremapped early, and cpm2_immr-> holds i2c controller, pram and other pleasant stuff. And, I am recalling i2c on 8540 working fine right out of the box... -- Sincerely, Vitaly
