linux-kernel - Re: [PATCH 3/4] mfd: stm32-timers: Drop TIM_DIER_CC_IE(x) in favour of TIM_DIER

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Date: Sun, 16 Jun 2024 17:46:45 +0900
From: William Breathitt Gray <wbg@...nel.org>
To: Uwe Kleine-König <u.kleine-koenig@...libre.com>
Cc: Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Lee Jones <lee@...nel.org>, linux-iio@...r.kernel.org,
	linux-pwm@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] mfd: stm32-timers: Drop TIM_DIER_CC_IE(x) in favour
 of TIM_DIER_CCxIE(x)

On Fri, Jun 14, 2024 at 10:10:13AM +0200, 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>

I concur with Lee Jones that the subject should be renamed. Regardless,
here's my ack for the code changes.

Acked-by: William Breathitt Gray <wbg@...nel.org>

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