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

[Javier Martinez Canillas]

Hello Arnd,

On 02/24/2016 01:56 PM, Arnd Bergmann wrote:
> On Tuesday 16 February 2016 21:19:07 Eddie Huang wrote:
> > On Tue, 2016-02-16 at 12:37 +0100, Arnd Bergmann wrote:
> > > On Monday 15 February 2016 11:50:48 Javier Martinez Canillas wrote:
> > > > 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@xxxxxxxxxxxx>");
> > > > > >    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.
> > >
> > > I agree. We can alway add a MODULE_DEVICE_TABLE() if we get multiple
> > > users of this driver on architectures that don't use devicetree yet.
> >
> > Sure. Thanks the patch to add expandability to this driver.
> >
> > Acked-by: Eddie Huang <eddie.huang@xxxxxxxxxxxx>
>
> I think we misunderstood one another. I think we can drop both the MODULE_DEVICE_TABLE and the MODULE_ALIAS: there is no need for another
> driver ID when it is always probed using DT.

That's how I understood but then Eddie said the opposite so I got confused
and was waiting for your clarification. I'll re-spin and remove the alias.

> 	Arnd

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