[U-Boot] [PATCH 19/31] i2c, mpc83xx: add CONFIG_SYS_I2C_INIT_BOARD for fsl_i2c

[Joakim Tjernlund]

> 
> This patch adds the possibility to call a board specific
> i2c bus reset routine for the fsl_i2c bus driver, and adds
> this option for the keymile kmeter1 board.
> 
> Signed-off-by: Heiko Schocher <hs at denx.de>
> ---
>  board/keymile/common/common.c |   14 ++++++++++++++
>  drivers/i2c/fsl_i2c.c         |    6 ++++++
>  include/configs/kmeter1.h     |    1 +
>  3 files changed, 21 insertions(+), 0 deletions(-)
> 
> diff --git a/board/keymile/common/common.c 
b/board/keymile/common/common.c
> index 17312b5..a282421 100644
> --- a/board/keymile/common/common.c
> +++ b/board/keymile/common/common.c
> @@ -421,6 +421,7 @@ static int get_scl (void)
> 
>  #endif
> 
> +#if !defined(CONFIG_KMETER1)
>  static void writeStartSeq (void)
>  {
>     set_sda (1);
> @@ -471,6 +472,7 @@ static int i2c_make_abort (void)
>     get_sda ();
>     return ret;
>  }
> +#endif
> 
>  /**
>   * i2c_init_board - reset i2c bus. When the board is powercycled during 
a
> @@ -478,6 +480,17 @@ static int i2c_make_abort (void)
>   */
>  void i2c_init_board(void)
>  {
> +#if defined(CONFIG_KMETER1)
> +   struct fsl_i2c *dev;
> +   dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
> +   uchar   dummy;
> +
> +   out_8 (&dev->cr, (I2C_CR_MSTA));
> +   out_8 (&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
> +   dummy = in_8(&dev->dr);
> +   out_8 (&dev->cr, (I2C_CR_MEN));

Are you sure this will generate a proper I2C reset sequence? We also
use this controller and I tried to do it too but didn't find a way. I then 
asked
Freescale and they could not come up with a solution either.

   Jocke