linux-kernel - Re: [PATCH v2 3/5] counter: stm32-timer-cnt: Use TIM_DIER_CCxIE(x) instead of TIM_DIER

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Message-ID: <20240620093227.GI3029315@google.com>
Date: Thu, 20 Jun 2024 10:32:27 +0100
From: Lee Jones <lee@...nel.org>
To: William Breathitt Gray <wbg@...nel.org>
Cc: Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	linux-pwm@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
	linux-iio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Thorsten Scherer <T.Scherer@...elmann.de>
Subject: Re: [PATCH v2 3/5] counter: stm32-timer-cnt: Use TIM_DIER_CCxIE(x)
 instead of TIM_DIER_CCxIE(x)

On Thu, 20 Jun 2024, William Breathitt Gray wrote:

> On Thu, Jun 20, 2024 at 09:44:51AM +0100, Lee Jones wrote:
> > On Wed, 19 Jun 2024, Uwe Kleine-König wrote:
> > 
> > > These two defines have the same purpose and this change doesn't
> > > introduce any differences in drivers/counter/stm32-timer-cnt.o.
> > > 
> > > The only difference between the two is that
> > > 
> > > 	TIM_DIER_CC_IE(1) == TIM_DIER_CC2IE
> > > 
> > > while
> > > 
> > > 	TIM_DIER_CCxIE(1) == TIM_DIER_CC1IE
> > > 
> > > . That makes it necessary to have an explicit "+ 1" in the user code,
> > > but IMHO this is a good thing as this is the code locatation that
> > > "knows" that for software channel 1 you have to use TIM_DIER_CC2IE
> > > (because software guys start counting at 0, while the relevant hardware
> > > designer started at 1).
> > > 
> > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...libre.com>
> > > ---
> > >  drivers/counter/stm32-timer-cnt.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > Did you drop William's Ack on purpose?
> > 
> > -- 
> > Lee Jones [李琼斯]
> 
> No problem, here it is again for the sake of the LKML scraper tools:
> 
> Acked-by: William Breathitt Gray <wbg@...nel.org>
> 
> Lee, do you prefer taking this patchset through your tree?

I think that would make things easier.

A pull-request for you and the PWM folk would follow.

-- 
Lee Jones [李琼斯]