linux-kernel - Re: [RFC PATCH 1/4] PLATFORM: introduce structure to bind async platform data to a dev path name

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Message-ID: <4D7C0423.9020204@linaro.org>
Date:	Sat, 12 Mar 2011 23:39:15 +0000
From:	Andy Green <andy@...mcat.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	patches@...aro.org
Subject: Re: [RFC PATCH 1/4] PLATFORM: introduce structure to bind async platform
 data to a dev path name

On 03/12/2011 11:29 PM, Somebody in the thread at some point said:

Hi -

> On Saturday, March 12, 2011, Andy Green wrote:
>> This structure allows tagging arbitrary platform_data that can't be attached
>> to a device until after it is probed, with the device path name that it is
>> to be attached to.

>> +struct platform_async_platform_data {
>> +	const char *device_path;
>> +	void *platform_data;
>> +};
>> +
>>   #endif /* _PLATFORM_DEVICE_H_ */
>
> Using device paths for this purpose seems to be very fragile to me.  Isn't
> there any better solution?

Given that this targets board definition files which commonly do the 
platform_add_device for the USB bus controller synchronously, and the 
bus-connected devices it is aimed at are soldered on to the board 
connected to specific bus controllers, the bus paths are completely 
deterministic.

-Andy
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