linux-kernel - Re: [PATCH] w1: Add 1-wire slave device driver for DS28E04-100

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Message-ID: <4FAAF1C4.2050500@hrz.tu-chemnitz.de>
Date:	Thu, 10 May 2012 00:37:56 +0200
From:	Markus Franke <markus.franke@...02.tu-chemnitz.de>
To:	Greg KH <greg@...ah.com>
CC:	Markus Franke <markus.franke@...02.tu-chemnitz.de>,
	Evgeniy Polyakov <zbr@...emap.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] w1: Add 1-wire slave device driver for DS28E04-100

Dear Greg,

Am 10.05.2012 00:24, schrieb Greg KH:

>> the file "pio" is used for reading the current PIO state of the
>> DS28E04-100.
> 
> Why is this a binary file?  That seems like it should not be, as a
> binary sysfs file should be "pass-through" only.


Well, the data read/written through this file is actually directly
"passed" on to the device. There are two bits which reflect the current
state of the PIO pins of the DS28E04. However, I must admit that this
could also be implemented as regular sysfs attributes.

Best regards,
Markus Franke
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