linux-kernel - Re: [RESEND 09/10] regulator: pwm-regulator: Simplify voltage to duty-cycle call

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Date:	Tue, 7 Jul 2015 14:45:03 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, lgirdwood@...il.com
Subject: Re: [RESEND 09/10] regulator: pwm-regulator: Simplify voltage to
 duty-cycle call

On Tue, 07 Jul 2015, Mark Brown wrote:

> On Mon, Jul 06, 2015 at 09:58:31AM +0100, Lee Jones wrote:
> > If we reverse some of the logic and change the formula used,
> > we can simplify the function greatly.
> 
> > +static int pwm_voltage_to_duty_cycle(struct regulator_dev *rdev, int req_uV)
> >  {
> > -	struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
> 
> You just added this function in the previous patch?

You're right, it does look a little weird contained in a single
patch-set.  The submission in the previous patch is the tried and
tested (i.e. in real releases) method written by ST.  This patch
contains a simplification provided by me.  IMO it looks and performs
better, but doesn't have the same time-under-test that the original
method does.  I'm merely ensuring we keep some history in order so
provide and easy way back i.e. revert.

If I have any say at all, I'd really like to keep this piece of
history.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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