RE: [PATCH v2 1/3] soc: renesas: rz-sysc: Register auxiliary device for PWRRDY power sequencer

Hi Geert,

Thanks for the feedback.

> -----Original Message-----
> From: Geert Uytterhoeven <[email protected]>
> Sent: 07 August 2026 15:12
> Subject: Re: [PATCH v2 1/3] soc: renesas: rz-sysc: Register auxiliary device for PWRRDY power sequencer
> 
> Hi Biju,
> 
> On Wed, 29 Jul 2026 at 11:31, Biju <[email protected]> wrote:
> > From: Biju Das <[email protected]>
> >
> > Some RZ SoCs (e.g. RZ/G3L) have a PWRRDY register that is controlled
> > through a power sequencer rather than directly by the SYSC driver.
> >
> > Add a pwrrdy_pwrseq flag to struct rz_sysc_soc_id_init_data to mark
> > SoCs with this property, and set it for RZ/G3L. When set,
> > rz_sysc_probe() registers a "pwrseq-pwrrdy" auxiliary device so a
> > dedicated driver can handle the PWRRDY sequencing, with automatic
> > teardown via devm_add_action_or_reset().
> >
> > Signed-off-by: Biju Das <[email protected]>
> > ---
> > v1->v2:
> >  * Switched to devm_auxiliary_device_create().
> >  * Added regmap parameter to rz_sysc_pwrrdy_pwrseq_init(),so that regmap
> >    can be passed as platform data.
> 
> Thanks for the update!
> 
> > --- a/drivers/soc/renesas/rz-sysc.c
> > +++ b/drivers/soc/renesas/rz-sysc.c
> 
> > @@ -84,6 +85,22 @@ static int rz_sysc_soc_init(struct rz_sysc *sysc, const struct of_device_id *mat
> >         return 0;
> >  }
> >
> > +static int rz_sysc_pwrrdy_pwrseq_init(struct device *dev, struct regmap *regmap,
> > +                                     const struct rz_sysc_init_data
> > +*data) {
> > +       const struct rz_sysc_soc_id_init_data *soc_data = data->soc_id_init_data;
> > +       struct auxiliary_device *adev;
> > +
> > +       if (!soc_data->pwrrdy_pwrseq)
> > +               return 0;
> > +
> > +       adev = devm_auxiliary_device_create(dev, "pwrseq-pwrrdy",
> > + (__force void *)regmap);
> 
> I don't think you need a cast (copied from a driver passing an __iomem pointer?)

You are correct, will drop the casting in next version.

Cheers,
Biju

> 
> > +       if (!adev)
> > +               return -ENODEV;
> > +
> > +       return 0;
> > +}
> > +
> >  static const struct of_device_id rz_sysc_match[] = {  #ifdef
> > CONFIG_SYSC_R9A08G045
> >         { .compatible = "renesas,r9a08g045-sysc", .data =
> > &rzg3s_sysc_init_data },
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
> 
> 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