linux-kernel - Re: [PATCH v6 4/7] pwm: pca9685: Support staggered output ON times

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Message-ID: <20210329170357.par7c3izvtmtovlj@pengutronix.de>
Date:   Mon, 29 Mar 2021 19:03:57 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Clemens Gruber <clemens.gruber@...ruber.com>
Cc:     linux-pwm@...r.kernel.org,
        Thierry Reding <thierry.reding@...il.com>,
        Sven Van Asbroeck <TheSven73@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 4/7] pwm: pca9685: Support staggered output ON times

On Mon, Mar 29, 2021 at 02:57:04PM +0200, Clemens Gruber wrote:
> The PCA9685 supports staggered LED output ON times to minimize current
> surges and reduce EMI.
> When this new option is enabled, the ON times of each channel are
> delayed by channel number x counter range / 16, which avoids asserting
> all enabled outputs at the same counter value while still maintaining
> the configured duty cycle of each output.
> 
> Signed-off-by: Clemens Gruber <clemens.gruber@...ruber.com>

Is there a reason to not want this staggered output? If it never hurts I
suggest to always stagger and drop the dt property.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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