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In-Reply-To: <20240308172726.225357-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Fri, 8 Mar 2024 20:47:17 +0100
Message-ID: <CAMuHMdW56ihcdZE_=y5MgURbmFjuPXkVjnHtA8HZ+BWznrvTXA@mail.gmail.com>
Subject: Re: [PATCH 3/5] i2c: riic: Introduce helper functions for I2C
 read/write operations
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>, Andi Shyti <andi.shyti@kernel.org>, 
	Rob Herring <robh+dt@kernel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, 
	Magnus Damm <magnus.damm@gmail.com>, Wolfram Sang <wsa+renesas@sang-engineering.com>, 
	linux-renesas-soc@vger.kernel.org, linux-i2c@vger.kernel.org, 
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, 
	Fabrizio Castro <fabrizio.castro.jz@renesas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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Hi Prabhakar,

On Fri, Mar 8, 2024 at 6:28=E2=80=AFPM Prabhakar <prabhakar.csengg@gmail.co=
m> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Introduce helper functions for performing I2C read and write operations
> in the RIIC driver.
>
> These helper functions lay the groundwork for adding support for the
> RZ/V2H SoC. This is essential because the register offsets for the RZ/V2H
> SoC differ from those of the RZ/A SoC. By abstracting the read and write
> operations, we can seamlessly adapt the driver to support different SoC
> variants without extensive modifications.
>
> This patch is part of the preparation process for integrating support for
> the RZ/V2H SoC into the RIIC driver.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>

Thanks for your patch!

> --- a/drivers/i2c/busses/i2c-riic.c
> +++ b/drivers/i2c/busses/i2c-riic.c
> @@ -105,9 +105,19 @@ struct riic_irq_desc {
>         char *name;
>  };
>
> +static inline void riic_writeb_reg(u8 val, struct riic_dev *riic, u8 off=
set)

Having "riic" in the middle is definitely the wrong order of parameters ;-)
Please make "riic" the first parameter.

> +{
> +       writeb(val, riic->base + offset);
> +}
> +
> +static inline u8 riic_readb_reg(struct riic_dev *riic, u8 offset)
> +{
> +       return readb(riic->base + offset);
> +}


> -       writeb(0, riic->base + RIIC_ICSR2);
> +       riic_writeb_reg(0, riic, RIIC_ICSR2);

This clearly shows that the new accessors involve more typing work.
Why not just call them riic_writeb() and riic_readb()?

Gr{oetje,eeting}s,

                        Geert

--=20
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k=
org

In personal conversations with technical people, I call myself a hacker. Bu=
t
when I'm talking to journalists I just say "programmer" or something like t=
hat.
                                -- Linus Torvalds