linux-kernel - Re: [PATCH 1/6] regulator: consumer driver regulator control framework.

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Date:	Sat, 23 Feb 2008 10:36:42 -0800
From:	David Brownell <david-b@...bell.net>
To:	linux-arm-kernel@...ts.arm.linux.org.uk
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Liam Girdwood <lg@...nsource.wolfsonmicro.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] regulator: consumer driver regulator control framework.

On Saturday 23 February 2008, Andrew Morton wrote:
> On Wed, 20 Feb 2008 17:08:53 +0000 Liam Girdwood <lg@...nsource.wolfsonmicro.com> wrote:
> > +#define mV_to_uV(mV)	(mV * 1000)
> > +#define uV_to_mV(uV)	(uV / 1000)
> > +#define V_to_uV(V)	(mV_to_uV(V * 1000))
> > +#define uV_to_V(uV)	(uV_to_mV(uV) / 1000)
> > +#define mA_to_uA(mA)	(mA * 1000)
> > +#define uA_to_mA(uA)	(uA / 1000)
> > +#define A_to_uA(A)	(mA_to_uA(A * 1000))
> > +#define uA_to_A(uA)	(uA_to_mA(uA) / 1000)
> 
> hm.  It might be nicer to make these static inline functions.  Especially
> if the code is consistent about what C type is used to represent voltage
> and current.

And if not ... then be sure to use e.g. ((mV) * 1000), ((uV) / 1000) etc
so that params like "x + 23" can't cause chaos.

(FWIW oth these points -- use inlines, parenthesize params -- are also
found in Documentation/CodingStyle.)
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