linux-kernel - Re: [PATCH] clk: s2mps11: initialize driver via module_platform

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Date:   Tue, 22 Sep 2020 10:04:30 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Sangbeom Kim <sbkim73@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH] clk: s2mps11: initialize driver via
 module_platform_driver

Hi Krzysztof,

On 21.09.2020 22:35, Krzysztof Kozlowski wrote:
> The driver was using subsys_initcall() because in old times deferred
> probe was not supported everywhere and specific ordering was needed.
> Since probe deferral works fine and specific ordering is discouraged
> (hides dependencies between drivers and couples their boot order), the
> driver can be converted to regular module_platform_driver.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
>   drivers/clk/clk-s2mps11.c | 13 +------------
>   1 file changed, 1 insertion(+), 12 deletions(-)
>
> diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
> index 2ce370c804aa..aa21371f9104 100644
> --- a/drivers/clk/clk-s2mps11.c
> +++ b/drivers/clk/clk-s2mps11.c
> @@ -267,18 +267,7 @@ static struct platform_driver s2mps11_clk_driver = {
>   	.remove = s2mps11_clk_remove,
>   	.id_table = s2mps11_clk_id,
>   };
> -
> -static int __init s2mps11_clk_init(void)
> -{
> -	return platform_driver_register(&s2mps11_clk_driver);
> -}
> -subsys_initcall(s2mps11_clk_init);
> -
> -static void __exit s2mps11_clk_cleanup(void)
> -{
> -	platform_driver_unregister(&s2mps11_clk_driver);
> -}
> -module_exit(s2mps11_clk_cleanup);
> +module_platform_driver(s2mps11_clk_driver);
>   
>   MODULE_DESCRIPTION("S2MPS11 Clock Driver");
>   MODULE_AUTHOR("Yadwinder Singh Brar <yadi.brar@...sung.com>");

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland