linux-kernel - Re: [PATCH 3/4] usb: phy: twl4030: add support for reading restore on ID pin.

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Message-ID: <20150304101737.GA30887@amd>
Date:	Wed, 4 Mar 2015 11:17:38 +0100
From:	Pavel Machek <pavel@....cz>
To:	NeilBrown <neilb@...e.de>
Cc:	Tony Lindgren <tony@...mide.com>, Felipe Balbi <balbi@...com>,
	Kishon Vijay Abraham I <kishon@...com>,
	linux-omap@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	GTA04 owners <gta04-owner@...delico.com>
Subject: Re: [PATCH 3/4] usb: phy: twl4030: add support for reading restore
 on ID pin.

Hi!

> > New /sys files should be documented somewhere...?
> 
> Preferably with the code...
> 
> > Does it make sense to change "440k" -> "440KOhm"?
> 
> Interesting question.  I prefer to avoid including units in files - bare
> numbers is better.  But there is no number to match "floating" unless I spell
> it out as "infinity", and wouldn't be helpful.
> 
> Certainly "K" would be preferred over "k", and given that I have "ground"
> and  "floating", it is more consistent to include the "Ohm"....
> 
> These are really names, not measures of resistance.  The data sheet calls
> them:
>  ID_RES_FLOAT  (or sometimes ID_FLOAT)
>  ID_RES_440K
>  ID_RES_200K
>  ID_RES_102K
>  ID_GND        (or sometimes ID_RES_GND)
> 
> So using those names is defensible.
> 
> I think I'll change them all to upper case, but leave out the "Ohm".
> My justification is consistency with the data sheet.

Does it make sense to use "_ohm" in the attribute name, then? (And
yes, I was wrong with the "K", "k" is actually right.)

> > Plus I guess you need to update Documentation/
> 
> I guess I'll need to give in to this eventually :-)

Yes please. It was useful in past.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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