linux-kernel - Re: [PATCH v2 3/4] i2c: riic: Pass register offsets and chip details as OF data

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Date: Fri, 15 Mar 2024 14:07:00 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Chris Brandt <chris.brandt@...esas.com>, Andi Shyti <andi.shyti@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Magnus Damm <magnus.damm@...il.com>, Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	linux-renesas-soc@...r.kernel.org, linux-i2c@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 3/4] i2c: riic: Pass register offsets and chip details
 as OF data

On Fri, Mar 15, 2024 at 11:31 AM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> With an increasing number of SoCs reusing this driver, each with slight
> variations in the RIIC IP, it becomes necessary to support passing these
> details as OF data. This approach simplifies the extension of the driver
> for other SoCs.
>
> This patch lays the groundwork for adding support for the Renesas RZ/V2H
> SoC.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> v1->v2
> - Dropped family from struct riic_of_data
> - Included RIIC_REG_END in enum list as flexible array member
>   in a struct with no named members is not allowed

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

> --- a/drivers/i2c/busses/i2c-riic.c
> +++ b/drivers/i2c/busses/i2c-riic.c
> @@ -453,6 +461,8 @@ static int riic_i2c_probe(struct platform_device *pdev)
>                 }
>         }
>
> +       riic->info = of_device_get_match_data(&pdev->dev);

This is fine, as all in-tree users use DT (Linux does not support
sh7752/sh7753, which seem to use the same RIIC variant as RZ/V2H).

> +
>         adap = &riic->adapter;
>         i2c_set_adapdata(adap, riic);
>         strscpy(adap->name, "Renesas RIIC adapter", sizeof(adap->name));

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

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