linux-kernel - Re: [PATCH v2 2/4] i2c: riic: Introduce helper functions for I2C read/write operations

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Date: Fri, 15 Mar 2024 13:58:47 +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 2/4] i2c: riic: Introduce helper functions for I2C
 read/write operations

Hi Prabhakar,

On Fri, Mar 15, 2024 at 11:31 AM Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...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@...renesas.com>
> ---
> v1->v2
> - Renamed i2c read/write to riic_readb/riic_writeb
> - Made riic as first parameter for riic_writeb

Thanks for the update!

> --- 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(struct riic_dev *riic, u8 offset, u8 val)

Please use the same parameter order as writeb(), i.e. "val" before
"offset"), to increase uniformity.  This also would make it easier
to review your changes using "git {diff,show} --color-words".

The rest LGTM.

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