linux-kernel - Re: [PATCH 3/5] rtc: tegra: use module_platform_driver

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Date:	Mon, 11 Mar 2013 11:16:03 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
CC:	akpm@...ux-foundation.org, a.zummo@...ertech.it,
	rtc-linux@...glegroups.com, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] rtc: tegra: use module_platform_driver_probe for
 module init/exit

On 03/09/2013 11:09 AM, Laxman Dewangan wrote:
> Use macro module_platform_driver_probe() to reduce some of the
> boilerplate code in the driver.
> 
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> ---
>  drivers/rtc/rtc-tegra.c |   12 +-----------
>  1 files changed, 1 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
> index f7718de..4cba10d 100644
> --- a/drivers/rtc/rtc-tegra.c
> +++ b/drivers/rtc/rtc-tegra.c
> @@ -451,17 +451,7 @@ static struct platform_driver tegra_rtc_driver = {
>  	},
>  };
>  
> -static int __init tegra_rtc_init(void)
> -{
> -	return platform_driver_probe(&tegra_rtc_driver, tegra_rtc_probe);
> -}
> -module_init(tegra_rtc_init);
> -
> -static void __exit tegra_rtc_exit(void)
> -{
> -	platform_driver_unregister(&tegra_rtc_driver);
> -}
> -module_exit(tegra_rtc_exit);
> +module_platform_driver_probe(tegra_rtc_driver, tegra_rtc_probe);

Out of curiosity here, why not just module_platform_driver(); can't the
instantiation of the RTC device be driven by the presence of the DT
node, and hence the creation of the platform device object, just like
any other driver/device?
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