linux-kernel - Re: [PATCH] rtc: Make rtc-ds1742 driver hotplug-aware

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Date:	Sat, 18 Aug 2007 01:04:12 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	jengelh@...putergmbh.de
Cc:	david-b@...bell.net, a.zummo@...ertech.it,
	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	dbrownell@...rs.sourceforge.net
Subject: Re: [PATCH] rtc: Make rtc-ds1742 driver hotplug-aware

On Fri, 17 Aug 2007 17:37:01 +0200 (CEST), Jan Engelhardt <jengelh@...putergmbh.de> wrote:
> >Most busses don't have managed device IDs like PCI, USB, or PNP.
> >
> >The platform, spi, and i2c busses use the driver name, which is
> >obviously managed within the scope of all Linux drivers.
> >
> Yeah but that does not tell me why it needs the ds1742 alias
> if scripts (whatever they use to discover it) could modprobe rtc-ds1742
> instead.

Well, the rtc-ds1742 platform driver uses a string "ds1742" for its
platform_driver definition.

static struct platform_driver ds1742_rtc_driver = {
	.probe		= ds1742_rtc_probe,
	.remove		= __devexit_p(ds1742_rtc_remove),
	.driver		= {
		.name	= "ds1742",
		.owner	= THIS_MODULE,
	},
};

We can change the name string and all definitions of "ds1742" platform
device instead of adding MODULE_ALIAS.  It is easy since there are
only a few users in kernel.  If that was preferred, I can rewrite this
patch.

---
Atsushi Nemoto
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