Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Mon, 29 Mar 2021 18:33:56 +0200
From:   Clemens Gruber <clemens.gruber@pqgruber.com>
To:     Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= 
        <u.kleine-koenig@pengutronix.de>
Cc:     linux-pwm@vger.kernel.org,
        Thierry Reding <thierry.reding@gmail.com>,
        Sven Van Asbroeck <TheSven73@gmail.com>,
        linux-kernel@vger.kernel.org, kernel@pengutronix.de
Subject: Re: [PATCH v6 2/7] pwm: pca9685: Support hardware readout
Message-ID: <YGIBdBdQJOgbPMTw@workstation.tuxnet>
References: <20210329125707.182732-1-clemens.gruber@pqgruber.com>
 <20210329125707.182732-2-clemens.gruber@pqgruber.com>
 <20210329155140.4gjtsw2qbpylv77z@pengutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20210329155140.4gjtsw2qbpylv77z@pengutronix.de>
Precedence: bulk

Hi Uwe,

On Mon, Mar 29, 2021 at 05:51:40PM +0200, Uwe Kleine-K?nig wrote:
> Hello Clemens,
> 
> On Mon, Mar 29, 2021 at 02:57:02PM +0200, Clemens Gruber wrote:
> > The hardware readout may return slightly different values than those
> > that were set in apply due to the limited range of possible prescale and
> > counter register values.
> 
> This is fine and for most hardware that's not preventable. My
> requirement here is that 
> 
> 	.get_state(pwm, &state);
> 	.apply_state(pwm, &state);
> 
> doesn't yield any changes.

Yes, that would not change anything.

Thanks,
Clemens