RE: [PATCH v3 4/6] can: rcar_canfd: Add postdiv to struct rcar_canfd_hw_info

[Biju Das <biju.das.jz@bp.renesas.com>]

Hi Geert,

Thanks for the feedback.

> Subject: Re: [PATCH v3 4/6] can: rcar_canfd: Add postdiv to struct
> rcar_canfd_hw_info
> 
> Hi Biju,
> 
> On Thu, Oct 27, 2022 at 10:22 AM Biju Das <biju.das.jz@bp.renesas.com>
> wrote:
> > R-Car has a clock divider for CAN FD clock within the IP, whereas it
> > is not available on RZ/G2L.
> >
> > Add postdiv variable to struct rcar_canfd_hw_info to take care of
> this
> > difference.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > ---
> > v2->v3:
> >  * Replaced data type of postdiv from unsigned int->u8 to save
> memory.
> 
> Thanks for the update!
> 
> > --- a/drivers/net/can/rcar/rcar_canfd.c
> > +++ b/drivers/net/can/rcar/rcar_canfd.c
> > @@ -1943,9 +1947,9 @@ static int rcar_canfd_probe(struct
> platform_device *pdev)
> >         }
> >         fcan_freq = clk_get_rate(gpriv->can_clk);
> >
> > -       if (gpriv->fcan == RCANFD_CANFDCLK && info->chip_id !=
> RENESAS_RZG2L)
> > +       if (gpriv->fcan == RCANFD_CANFDCLK)
> >                 /* CANFD clock is further divided by (1/2) within
> the
> > IP */
> 
> may be further divided?

Yes, It make sense. Will send v4 with this change.
/* CANFD clock may be further divided by (1/2) within the IP */

Cheers,
Biju

> 
> > -               fcan_freq /= 2;
> > +               fcan_freq /= info->postdiv;
> >
> >         addr = devm_platform_ioremap_resource(pdev, 0);
> >         if (IS_ERR(addr)) {
> 
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 --
> geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a
> hacker. But when I'm talking to journalists I just say "programmer" or
> something like that.
>                                 -- Linus Torvalds