From: Drew Fustini <drew@pdp7.com>
To: Michal Wilczynski <m.wilczynski@samsung.com>
Cc: "Uwe Kleine-König" <ukleinek@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"Guo Ren" <guoren@kernel.org>, "Fu Wei" <wefu@redhat.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Benno Lossin" <lossin@kernel.org>,
"Michael Turquette" <mturquette@baylibre.com>,
"Stephen Boyd" <sboyd@kernel.org>,
linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org,
rust-for-linux@vger.kernel.org, linux-riscv@lists.infradead.org,
devicetree@vger.kernel.org, linux-clk@vger.kernel.org
Subject: Re: [PATCH v2 0/7] Rust Abstractions for PWM subsystem with TH1520 PWM driver
Date: Thu, 12 Jun 2025 10:49:38 -0700 [thread overview]
Message-ID: <aEsTMrdmC7drMJIs@x1> (raw)
In-Reply-To: <b3252042-e7fd-4ac9-a4ad-0226d21fd477@samsung.com>
On Thu, Jun 12, 2025 at 03:27:09PM +0200, Michal Wilczynski wrote:
>
>
> On 6/12/25 07:01, Uwe Kleine-König wrote:
> > Hello Drew,
> >
> > On Wed, Jun 11, 2025 at 04:52:22PM -0700, Drew Fustini wrote:
> >> I also enabled the pwm fan driver. However, there is a probe failure:
> >>
> >> [ 1.250921] pwm-fan pwm-fan: Failed to configure PWM: -524
> >> [ 1.256546] pwm-fan pwm-fan: probe with driver pwm-fan failed with error -524
> >
> > 524 = ENOTSUPP, so it seems the request had duty_offset > 0. Does your
> > fan use PWM_POLARITY_INVERTED? If so, try without that flag. If your fan
> > really needs an inverted PWM this of course makes fan control buggy.
> > With the next revision it should work fine (as a duty_offset > 0 should
> > get rounded down to 0).
>
> Since we're running the same DT, the polarity shouldn't be inverted. I
> see you have CONFIG_PWM_DEBUG=y enabled, which is most likely the reason
> the probe fails.
Thanks, I've disabled that options and the probe completes okay. The fan
is now spinning :)
Drew
prev parent reply other threads:[~2025-06-12 17:49 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20250610125330eucas1p2a573627ca8f124fe11e725c2d75bdcc9@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 0/7] Rust Abstractions for PWM subsystem with TH1520 PWM driver Michal Wilczynski
[not found] ` <CGME20250610125332eucas1p2da441aa44760236527afc82495af95d1@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 1/7] rust: Add basic PWM abstractions Michal Wilczynski
2025-06-11 13:35 ` Miguel Ojeda
2025-06-12 9:12 ` Benno Lossin
[not found] ` <CGME20250610125333eucas1p16126b64a0f447a5e9a5ad553d9d7d79d@eucas1p1.samsung.com>
2025-06-10 12:52 ` [PATCH v2 2/7] pwm: Add Rust driver for T-HEAD TH1520 SoC Michal Wilczynski
2025-06-11 6:58 ` Uwe Kleine-König
2025-06-11 19:52 ` Michal Wilczynski
2025-06-11 20:04 ` Michal Wilczynski
2025-06-11 21:15 ` Michal Wilczynski
2025-06-11 21:40 ` Uwe Kleine-König
2025-06-12 8:14 ` Michal Wilczynski
2025-06-12 20:36 ` Uwe Kleine-König
2025-06-17 11:55 ` Michal Wilczynski
[not found] ` <CGME20250610125334eucas1p25545871cc703378afed320da70c2d2f3@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 3/7] clk: thead: Mark essential bus clocks as CLK_IGNORE_UNUSED Michal Wilczynski
2025-06-15 18:03 ` Drew Fustini
[not found] ` <CGME20250610125336eucas1p2ea5eaa740364b6db5007e0849465402d@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 4/7] dt-bindings: pwm: thead: Add T-HEAD TH1520 PWM controller Michal Wilczynski
2025-06-16 6:53 ` Krzysztof Kozlowski
[not found] ` <CGME20250610125337eucas1p199f9e3199e73f1a92462f39e611f07fe@eucas1p1.samsung.com>
2025-06-10 12:52 ` [PATCH v2 5/7] riscv: dts: thead: Add PWM controller node Michal Wilczynski
[not found] ` <CGME20250610125338eucas1p2cc606517da2482af0a1cfdfb4b51b1c3@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 6/7] riscv: dts: thead: Add PVT node Michal Wilczynski
[not found] ` <CGME20250610125340eucas1p2288ca1486b0d4a94abceafe9eaf6718d@eucas1p2.samsung.com>
2025-06-10 12:52 ` [PATCH v2 7/7] riscv: dts: thead: Add PWM fan and thermal control Michal Wilczynski
2025-06-10 21:10 ` [PATCH v2 0/7] Rust Abstractions for PWM subsystem with TH1520 PWM driver Drew Fustini
2025-06-11 15:14 ` Michal Wilczynski
2025-06-11 16:55 ` Miguel Ojeda
2025-06-11 23:52 ` Drew Fustini
2025-06-12 5:01 ` Uwe Kleine-König
2025-06-12 13:27 ` Michal Wilczynski
2025-06-12 17:49 ` Drew Fustini [this message]
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=aEsTMrdmC7drMJIs@x1 \
--to=drew@pdp7.com \
--cc=a.hindborg@kernel.org \
--cc=alex.gaynor@gmail.com \
--cc=alex@ghiti.fr \
--cc=aliceryhl@google.com \
--cc=aou@eecs.berkeley.edu \
--cc=bjorn3_gh@protonmail.com \
--cc=boqun.feng@gmail.com \
--cc=conor+dt@kernel.org \
--cc=dakr@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=gary@garyguo.net \
--cc=guoren@kernel.org \
--cc=krzk+dt@kernel.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pwm@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=lossin@kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=m.wilczynski@samsung.com \
--cc=mturquette@baylibre.com \
--cc=ojeda@kernel.org \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
--cc=robh@kernel.org \
--cc=rust-for-linux@vger.kernel.org \
--cc=sboyd@kernel.org \
--cc=tmgross@umich.edu \
--cc=ukleinek@kernel.org \
--cc=wefu@redhat.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).