linux-kernel - Re: [PATCH] rtc: mt6397: Add platform device ID table

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Date:	Mon, 15 Feb 2016 11:50:48 -0300
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Eddie Huang <eddie.huang@...iatek.com>
Cc:	linux-kernel@...r.kernel.org,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] rtc: mt6397: Add platform device ID table

Hello Eddie,

On 02/14/2016 10:58 PM, Eddie Huang wrote:

[snip]

>> @@ -412,6 +418,7 @@ static struct platform_driver mtk_rtc_driver = {
>>   	},
>>   	.probe	= mtk_rtc_probe,
>>   	.remove = mtk_rtc_remove,
>> +	.id_table = mt6397_rtc_id,
>>   };
>>
>>   module_platform_driver(mtk_rtc_driver);
>> @@ -419,4 +426,3 @@ module_platform_driver(mtk_rtc_driver);
>>   MODULE_LICENSE("GPL v2");
>>   MODULE_AUTHOR("Tianping Fang <tianping.fang@...iatek.com>");
>>   MODULE_DESCRIPTION("RTC Driver for MediaTek MT6397 PMIC");
>> -MODULE_ALIAS("platform:mt6397-rtc");
>
> This patch looks good to me, but I am wondering, since we tend to use
> device tree method to match driver, do we still need support platform
> device ID ?
>

I'm not familiar with neither this IP block nor the SoC so it is up to
you. I just noticed this issue when reviewing a regulator driver for a
similar PMIC posted by someone from mediatek.

I thought platform device was needed since the driver has a MODULE_ALIAS()
but please let me know what you prefer and I can re-spin the patch and
just remove the MODULE_ALIAS() if that makes more sense for this platform.
  
> Eddie
>
>

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America