Subject: Re: [PATCH] i2c-cpm: Fix to takeback i2c bus master-ship after a collision

From: Jochen Friedrich <[email-masked]>
Date: Wed, 31 Oct 2012 10:52:57 +0100

Hi Sachin,

looks good to me.

Acked-By: Jochen Friedrich <[email-masked]>

> Signed-off-by: Sachin Surendran <[email-masked]
> <mailto:[email-masked]>>
> ---
>   drivers/i2c/busses/i2c-cpm.c |    8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
> index c1e1096..bb94c6d 100644
> --- a/drivers/i2c/busses/i2c-cpm.c
> +++ b/drivers/i2c/busses/i2c-cpm.c
> @@ -338,6 +338,14 @@ static int cpm_i2c_xfer(struct i2c_adapter *adap,
> struct i2c_msg *msgs, int num)
>          tptr = 0;
>          rptr = 0;
> +       /*
> +        * If there was a collision in the last i2c transaction,
> +        * Set I2COM_MASTER as it was cleared during collision.
> +        */
> +       if (in_be16(&tbdf->cbd_sc) & BD_SC_CL) {
> +               out_8(&cpm->i2c_reg->i2com, I2COM_MASTER);
> +       }
> +
>          while (tptr < num) {
>                  pmsg = &msgs[tptr];
>                  dev_dbg(&adap->dev, "R: %d T: %d\n", rptr, tptr);
>

Thanks, Jochen