Hi Geert,
Thanks for your review!
> -----Original Message-----
> From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> Sent: Monday, August 4, 2025 11:19 AM
> To: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx>
> Subject: Re: [PATCH v6 1/5] soc: renesas: rz-sysc: Add syscon/regmap
> support
>
> Hi John,
>
> On Thu, 22 May 2025 at 20:23, John Madieu <john.madieu.xa@xxxxxxxxxxxxxx>
> wrote:
> > The RZ/G3E system controller has various registers that control or
> > report some properties specific to individual IPs. The regmap is
> > registered as a syscon device to allow these IP drivers to access the
> > registers through the regmap API.
> >
> > As other RZ SoCs might have custom read/write callbacks or
> > max-offsets, add register a custom regmap configuration.
> >
> > Signed-off-by: John Madieu <john.madieu.xa@xxxxxxxxxxxxxx>
> > [claudiu.beznea:
> > - s/rzg3e_sysc_regmap/rzv2h_sysc_regmap in RZ/V2H sysc
> > file
> > - do not check the match->data validity in rz_sysc_probe() as it is
> > always valid
> > - register the regmap if data->regmap_cfg is valid]
> > Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
>
> Thanks for your patch!
>
> As you probably noticed, I am not a big fan of syscon, so I try to avoid
> getting involved with syscon patches as much as possible.
> But this patch has appeared in multiple series, so I am afraid I cannot
> avoid it anymore ;-)
>
> > --- a/drivers/soc/renesas/r9a08g045-sysc.c
> > +++ b/drivers/soc/renesas/r9a08g045-sysc.c
> > @@ -18,6 +18,16 @@ static const struct rz_sysc_soc_id_init_data
> rzg3s_sysc_soc_id_init_data __initc
> > .specific_id_mask = GENMASK(27, 0), };
> >
> > +static const struct regmap_config rzg3s_sysc_regmap __initconst = {
> > + .name = "rzg3s_sysc_regs",
> > + .reg_bits = 32,
> > + .reg_stride = 4,
> > + .val_bits = 32,
> > + .fast_io = true,
> > + .max_register = 0xe20,
> > +};
>
> Struct regmap_config is a rather large structure, and the only SoC-specific
> members are the .name (which doesn't really matter) and .max_register
> members. Hence please move .max_register back to struct rz_sysc_init_data
> (like in v5), and allocate struct regmap_config dynamically (by embedding
> it into struct rz_sysc).
>
> > +
> > const struct rz_sysc_init_data rzg3s_sysc_init_data __initconst = {
> > .soc_id_init_data = &rzg3s_sysc_soc_id_init_data,
> > + .regmap_cfg = &rzg3s_sysc_regmap,
> > };
>
> > --- a/drivers/soc/renesas/rz-sysc.c
> > +++ b/drivers/soc/renesas/rz-sysc.c
> > @@ -117,7 +124,15 @@ static int rz_sysc_probe(struct platform_device
> *pdev)
> > return PTR_ERR(sysc->base);
> >
> > sysc->dev = dev;
> > - return rz_sysc_soc_init(sysc, match);
> > + ret = rz_sysc_soc_init(sysc, match);
> > + if (ret || !data->regmap_cfg)
>
> data->regmap_cfg should never be NULL (but this doesn't matter anymore,
> in the context of my request above).
>
> > + return ret;
> > +
> > + regmap = devm_regmap_init_mmio(dev, sysc->base, data-
> >regmap_cfg);
> > + if (IS_ERR(regmap))
> > + return PTR_ERR(regmap);
> > +
> > + return of_syscon_register_regmap(dev->of_node, regmap);
> > }
>
> The rest LGTM.
Will make the changes as per the v5. Thanks!
>
> 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
Regards,
John
