[U-Boot] [PATCH 2/2] fsl_i2c: Add CONFIG_FSL_I2C_CUSTOM_DFSR

[Joakim Tjernlund]

>
> Timur Tabi <timur at freescale.com> wrote on 15/09/2009 21:04:47:
> >
> > Joakim Tjernlund wrote:
> >
> > > No, the impact on speed from DFSR is pretty small so it will
> > > be close enough.
> >
> > How small?
> From the app note:
>   divisor = B * (A + ((3*C)/B)*2);
>
> C is dfsr and 10 <= A <= 30, 16 <= B <= 2048
> Considering the actual speed may be way lower the requested speed
> I think this is small enough.

Once we have the new procedure in place, we can calculate the exact
divisor so the need for extra CONFIG_ options goes away.

 Jocke