linux-kernel - Re: [PATCH v7 1/6] soc: renesas: rz-sysc: Add syscon/regmap support

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Message-ID: <CAMuHMdUcTXy3fSjviMEFFx_4EuVmVHSCZng5rntS=GGi6Yw+kA@mail.gmail.com>
Date: Tue, 19 Aug 2025 09:54:39 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: John Madieu <john.madieu.xa@...renesas.com>
Cc: magnus.damm@...il.com, mturquette@...libre.com, sboyd@...nel.org, 
	rafael@...nel.org, daniel.lezcano@...aro.org, rui.zhang@...el.com, 
	lukasz.luba@....com, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, 
	p.zabel@...gutronix.de, catalin.marinas@....com, will@...nel.org, 
	john.madieu@...il.com, linux-renesas-soc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
	devicetree@...r.kernel.org, biju.das.jz@...renesas.com, 
	linux-arm-kernel@...ts.infradead.org, 
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v7 1/6] soc: renesas: rz-sysc: Add syscon/regmap support

Hi John,

On Mon, 18 Aug 2025 at 18:29, John Madieu <john.madieu.xa@...renesas.com> 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,
> register a custom regmap configuration.
>
> Signed-off-by: John Madieu <john.madieu.xa@...renesas.com>
> [claudiu.beznea:
>  - do not check the match->data validity in rz_sysc_probe() as it is
>    always valid
>  - dinamically allocate regmap_cfg]
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Thanks for the update!

> v7: As this is a duplicate of [2], address comment received there, that is,
>     use kzalloc() + kfree() for regmap_cfg.

You use __free() instead of kfree()...

> --- a/drivers/soc/renesas/rz-sysc.c
> +++ b/drivers/soc/renesas/rz-sysc.c
> @@ -6,8 +6,10 @@
>   */
>

... so you need to include <linux/cleanup.h>

>  #include <linux/io.h>
> +#include <linux/mfd/syscon.h>
>  #include <linux/of.h>
>  #include <linux/platform_device.h>
> +#include <linux/regmap.h>
>  #include <linux/sys_soc.h>
>
>  #include "rz-sysc.h"

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
i.e. will queue in renesas-devel for v6.18 with the above fixed.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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