From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Clemens Gruber <clemens.gruber@pqgruber.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
linux-pwm@vger.kernel.org,
Sven Van Asbroeck <TheSven73@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 4/8] dt-bindings: pwm: Support new PWM_USAGE_POWER flag
Date: Sat, 17 Apr 2021 17:44:13 +0200 [thread overview]
Message-ID: <20210417154413.dk2ayjx4y3vo7mnd@pengutronix.de> (raw)
In-Reply-To: <YHmzNaxMjPJMcPmK@workstation.tuxnet>
[-- Attachment #1: Type: text/plain, Size: 2389 bytes --]
On Fri, Apr 16, 2021 at 05:54:29PM +0200, Clemens Gruber wrote:
> On Fri, Apr 16, 2021 at 03:55:11PM +0200, Thierry Reding wrote:
> > On Mon, Apr 12, 2021 at 03:27:41PM +0200, Clemens Gruber wrote:
> > > Add the flag and corresponding documentation for PWM_USAGE_POWER.
> > >
> > > Cc: Rob Herring <robh+dt@kernel.org>
> > > Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
> > > ---
> > > Documentation/devicetree/bindings/pwm/pwm.txt | 3 +++
> > > include/dt-bindings/pwm/pwm.h | 1 +
> > > 2 files changed, 4 insertions(+)
> >
> > Rob, what are your thoughts on this? I've been thinking about this some
> > more and I'm having second thoughts about putting this into device tree
> > because it doesn't actually describe a property of the PWM hardware but
> > rather a use-case specific hint. It's a bit of a gray area because this
> > is just part of the PWM specifier which already has use-case specific
> > "configuration", such as the period and the polarity.
This is something I'd prefer over making it part of the device tree API.
I still don't think it's a good idea but when we keep it in-kernel we
can at least easier modify it in the future.
> > Perhaps a better place for this is within the PWM API? We could add the
> > same information into struct pwm_state and then consumers that don't
> > care about specifics of the signal (such as pwm-backlight) can set that
> > flag when they request a state to be applied.
>
> I just want to note that in my opinion, this is not a flag that is
> changed often, so is it really a good idea to require setting this
> wherever PWM state is applied? Also, this can't be read-out in
> .get_state.
Not being able to read it out isn't a problem in my eyes.
> Thierry: If this discussion carries on and a v10 is required: Could you
> maybe merge the uncontroversial patches 1 to 3 of v9 separately and
> maybe get those in 5.12 ? Patches 4 to 8 can probably wait for 5.13 and
> have some time in linux-next.
I'm ok in getting those into next now and than into the upcoming merge
window. That won't make them part of 5.12 however, but 5.13-rc1. IMHO
patches 7 and 8 can go in, too.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2021-04-17 15:44 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 13:27 [PATCH v8 1/8] pwm: pca9685: Switch to atomic API Clemens Gruber
2021-04-12 13:27 ` [PATCH v8 2/8] pwm: pca9685: Support hardware readout Clemens Gruber
2021-04-12 16:21 ` Uwe Kleine-König
2021-04-12 13:27 ` [PATCH v8 3/8] pwm: pca9685: Improve runtime PM behavior Clemens Gruber
2021-04-12 13:27 ` [PATCH v8 4/8] dt-bindings: pwm: Support new PWM_USAGE_POWER flag Clemens Gruber
2021-04-12 16:27 ` Uwe Kleine-König
2021-04-12 16:46 ` Clemens Gruber
2021-04-13 11:38 ` Uwe Kleine-König
2021-04-13 11:41 ` Thierry Reding
2021-04-13 11:51 ` Thierry Reding
2021-04-13 17:56 ` Uwe Kleine-König
2021-04-15 16:27 ` Thierry Reding
2021-04-16 9:32 ` Uwe Kleine-König
2021-04-16 10:45 ` Thierry Reding
2021-04-18 13:30 ` Uwe Kleine-König
2021-04-16 13:55 ` Thierry Reding
2021-04-16 15:39 ` Rob Herring
2021-04-16 15:54 ` Clemens Gruber
2021-04-17 15:44 ` Uwe Kleine-König [this message]
2021-04-12 13:27 ` [PATCH v8 5/8] pwm: core: " Clemens Gruber
2021-04-12 13:27 ` [PATCH v8 6/8] pwm: pca9685: " Clemens Gruber
2021-04-12 16:30 ` Uwe Kleine-König
2021-04-12 17:11 ` Clemens Gruber
2021-04-13 10:34 ` Uwe Kleine-König
2021-04-12 13:27 ` [PATCH v8 7/8] pwm: pca9685: Restrict period change for enabled PWMs Clemens Gruber
2021-04-17 15:46 ` Uwe Kleine-König
2021-04-12 13:27 ` [PATCH v8 8/8] pwm: pca9685: Add error messages for failed regmap calls Clemens Gruber
2021-04-17 15:47 ` Uwe Kleine-König
2021-04-12 16:18 ` [PATCH v8 1/8] pwm: pca9685: Switch to atomic API Uwe Kleine-König
2021-04-12 16:39 ` Clemens Gruber
2021-04-12 20:10 ` Uwe Kleine-König
2021-04-13 12:11 ` Clemens Gruber
2021-04-13 12:17 ` Clemens Gruber
2021-04-13 12:37 ` Thierry Reding
2021-04-13 13:06 ` Clemens Gruber
2021-04-13 19:38 ` Uwe Kleine-König
2021-04-14 12:09 ` Clemens Gruber
2021-04-14 19:21 ` Uwe Kleine-König
2021-04-14 19:45 ` Clemens Gruber
2021-04-15 6:48 ` Uwe Kleine-König
2021-04-17 15:37 ` Uwe Kleine-König
2021-04-17 16:40 ` Clemens Gruber
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210417154413.dk2ayjx4y3vo7mnd@pengutronix.de \
--to=u.kleine-koenig@pengutronix.de \
--cc=TheSven73@gmail.com \
--cc=clemens.gruber@pqgruber.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pwm@vger.kernel.org \
--cc=robh+dt@kernel.org \
--cc=thierry.reding@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).