Re: [PATCH v5 3/5] media: i2c: ov5645: Turn probe error into warning for xvclk frequency mismatch

[Lad, Prabhakar]

Hi Geert,

Thank you for the review.

On Tue, Apr 7, 2020 at 8:19 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> Hi Prabhakar,
>
> On Mon, Apr 6, 2020 at 6:43 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:
> > PLL's on platforms might not be so accurate enough to generate the
> > required clock frequency, so instead of erroring out on xvlck frequency
>
> xvclk? (but see below)
>
> > mismatch just warn the user and continue ahead in probe.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
>
> Like for 2/5, what about the xvclk naming?
>
> > --- a/drivers/media/i2c/ov5645.c
> > +++ b/drivers/media/i2c/ov5645.c
> > @@ -1103,11 +1103,8 @@ static int ov5645_probe(struct i2c_client *client)
> >         }
> >         /* external clock must be 24MHz, allow 1% tolerance */
> >         xclk_freq = clk_get_rate(ov5645->xclk);
> > -       if (xclk_freq < 23760000 || xclk_freq > 24240000) {
> > -               dev_err(dev, "external clock frequency %u is not supported\n",
> > -                       xclk_freq);
> > -               return -EINVAL;
> > -       }
> > +       if (xclk_freq < 23760000 || xclk_freq > 24240000)
> > +               dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
>
> Calling it "xvclk" here will confuse the user, as the clock is named
> "xclk" in DT?
>
Agreed Ill replace it with xclk in the warning.

Cheers,
--Prabhakar

> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
>
> 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