linux-kernel - Re: [PATCH v4 5/5] pinctrl: s32: separate const device data from struct s32_pinctrl_soc

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Date:   Fri, 24 Mar 2023 16:55:36 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Chester Lin <clin@...e.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        NXP S32 Linux Team <s32@....com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Ghennadi Procopciuc <Ghennadi.Procopciuc@....nxp.com>,
        Andrei Stefanescu <andrei.stefanescu@....com>,
        Radu Pirea <radu-nicolae.pirea@....com>,
        Andreas Färber <afaerber@...e.de>,
        Matthias Brugger <mbrugger@...e.com>
Subject: Re: [PATCH v4 5/5] pinctrl: s32: separate const device data from
 struct s32_pinctrl_soc_info

On Fri, Mar 24, 2023 at 4:38 PM Chester Lin <clin@...e.com> wrote:
>
> The .data field in struct of_device_id is used as a const member so it's
> inappropriate to attach struct s32_pinctrl_soc_info with of_device_id
> because some members in s32_pinctrl_soc_info need to be filled by
> pinctrl-s32cc at runtime.
>
> For this reason, struct s32_pinctrl_soc_info must be allocated in
> pinctrl-s32cc and then create a new struct s32_pinctrl_soc_data in order
> to represent const .data in of_device_id. To combine these two structures,
> a s32_pinctrl_soc_data pointer is introduced in s32_pinctrl_soc_info.
>
> Besides, use of_device_get_match_data() instead of of_match_device() since
> the driver only needs to retrieve the .data from of_device_id.

...

>                 .compatible = "nxp,s32g2-siul2-pinctrl",
> -               .data = (void *) &s32_pinctrl_info,
> +               .data = (void *) &s32_pinctrl_data,

Do you need casting now?

-- 
With Best Regards,
Andy Shevchenko