[PATCH v2 3/3] clocksource/drivers/renesas-ostm: Add RZ/G2L OSTM support

[Biju Das]

Hi Geert,

Thanks for the feedback.

> Subject: Re: [PATCH v2 3/3] clocksource/drivers/renesas-ostm: Add RZ/G2L
> OSTM support
> 
> Hi Biju,
> 
> On Wed, Nov 10, 2021 at 4:32 PM Biju Das <biju.das.jz at bp.renesas.com>
> wrote:
> > RZ/G2L SoC has Generic Timer Module(a.k.a OSTM) which needs to
> > deassert the reset line before accessing any registers.
> >
> > This patch adds an entry point for RZ/G2L so that we can deassert the
> > reset line in probe callback.
> >
> > Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
> 
> Thanks for your patch!
> 
> > --- a/drivers/clocksource/renesas-ostm.c
> > +++ b/drivers/clocksource/renesas-ostm.c
> 
> > @@ -166,6 +169,14 @@ static int __init ostm_init(struct device_node *np)
> >         if (!to)
> >                 return -ENOMEM;
> >
> > +       rstc = of_reset_control_get_optional_exclusive(np, NULL);
> > +       if (IS_ERR(rstc)) {
> > +               ret = PTR_ERR(rstc);
> > +               goto err_free;
> > +       }
> > +
> > +       reset_control_deassert(rstc);
> > +
> >         to->flags = TIMER_OF_BASE | TIMER_OF_CLOCK;
> >         if (system_clock) {
> >                 /*
> > @@ -178,7 +189,7 @@ static int __init ostm_init(struct device_node
> > *np)
> >
> >         ret = timer_of_init(np, to);
> >         if (ret)
> > -               goto err_free;
> > +               goto err_reset;
> >
> >         /*
> >          * First probed device will be used as system clocksource. Any
> > @@ -203,9 +214,33 @@ static int __init ostm_init(struct device_node
> > *np)
> >
> >  err_cleanup:
> >         timer_of_cleanup(to);
> > +err_reset:
> > +       reset_control_assert(rstc);
> 
> Missing reset_control_put(rstc).

Oops. Missed it. Will fix it in next version

Regards,
Biju

> 
> >  err_free:
> >         kfree(to);
> >         return ret;
> >  }
> >
> >  TIMER_OF_DECLARE(ostm, "renesas,ostm", ostm_init);
> > +
> > +#ifdef CONFIG_ARCH_R9A07G044
> > +static int __init ostm_probe(struct platform_device *pdev) {
> > +       struct device *dev = &pdev->dev;
> > +
> > +       return ostm_init(dev->of_node); }
> > +
> > +static const struct of_device_id ostm_of_table[] = {
> > +       { .compatible = "renesas,ostm", },
> > +       { /* sentinel */ }
> > +};
> > +
> > +static struct platform_driver ostm_device_driver = {
> > +       .driver = {
> > +               .name = "renesas_ostm",
> > +               .of_match_table = of_match_ptr(ostm_of_table),
> 
> .suppress_bind_attrs = true?
> 
> > +       },
> > +};
> > +builtin_platform_driver_probe(ostm_device_driver, ostm_probe); #endif
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at 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