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

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Date:	Tue, 12 Mar 2013 00:59:41 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
	"rtc-linux@...glegroups.com" <rtc-linux@...glegroups.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...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 Monday 11 March 2013 10:46 PM, Stephen Warren wrote:
> 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?

Theoretically it should work but I will work with John (original author) 
about using the platform_driver_probe().
If he agrees then  I will send patch to convert it to 
module_platform_driver().



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