From: Andreas Kemnade <andreas@kemnade.info>
To: Mark Brown <broonie@kernel.org>
Cc: tony@atomide.com, lgirdwood@gmail.com,
linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, sboyd@kernel.org, nm@ti.com,
vireshk@kernel.org, letux-kernel@openphoenux.org
Subject: Re: [PATCH] regulator: twl: mark vdd1/2 as continuous on twl4030
Date: Mon, 17 Jun 2019 18:27:43 +0200 [thread overview]
Message-ID: <20190617182743.7f40f2ee@aktux> (raw)
In-Reply-To: <20190617114048.GN5316@sirena.org.uk>
On Mon, 17 Jun 2019 12:40:48 +0100
Mark Brown <broonie@kernel.org> wrote:
> On Mon, Jun 17, 2019 at 01:03:57PM +0200, Andreas Kemnade wrote:
> > Mark Brown <broonie@kernel.org> wrote:
> > > On Sat, Jun 15, 2019 at 06:33:14PM +0200, Andreas Kemnade wrote:
>
> > > Why is this a good fix and not defining the supported voltages? These
> > > look like fairly standard linear range regulators.
>
> > I am fixing the definition of the two regulators in the patch.
> > I am defining them as continuous.
> > Voltage ranges are defined in
> > arch/arm/boot/dts/twl4030.dtsi
> > Only the continuous flag is missing.
>
> > Is there anything else do you want to be defined?
>
> These regulators are not continuous regulators as far as I can see, they
> are normal linear range regulators and so should have their voltages
> enumerable like any other linear range regulator.
Citing tps65950 trm page 55:
The device contains three switch-mode power supplies (SMPS):
• VDD1: 1.2-A, buck DC/DC converter (VOUT = 0.6 V to 1.45 V, in steps of 12.5 mV)
• VDD2: 600-mA buck DC/DC converter (VOUT = 0.6 V to 1.45 V, in steps of 12.5 mV, and 1.5 V as a
single programmable value)
you are right, they are not really continuous. So should I add these
68 steps they have as a voltage list?
I think they are nearly continuous, so we should IMHO rather take that
not that strict. I guess there are no really continuous regulators, all
have steps as voltage is specified in a limited resolution. So what is
the exact meaning of that flag here?
I think it is common sense to specify these regulators as continuous.
Max and min values are already in arch/arm/boot/dts/twl4030.dtsi.
Regards,
Andreas
next prev parent reply other threads:[~2019-06-17 16:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-15 16:33 [PATCH] regulator: twl: mark vdd1/2 as continuous on twl4030 Andreas Kemnade
2019-06-17 10:31 ` Mark Brown
2019-06-17 11:03 ` Andreas Kemnade
2019-06-17 11:40 ` Mark Brown
2019-06-17 16:27 ` Andreas Kemnade [this message]
2019-06-17 17:02 ` Mark Brown
2019-06-17 17:21 ` Andreas Kemnade
2019-06-17 16:32 ` Andreas Kemnade
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