From: Guenter Roeck <linux@roeck-us.net>
To: florin.leotescu@oss.nxp.com
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Michael Shych <michaelsh@nvidia.com>,
linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, daniel.baluta@nxp.com,
viorel.suman@nxp.com, linux-arm-kernel@lists.infradead.org,
imx@lists.linux.dev, festevam@gmail.com,
Florin Leotescu <florin.leotescu@nxp.com>
Subject: Re: [PATCH v7 3/3] hwmon: emc2305: Support configurable fan PWM at shutdown
Date: Thu, 30 Apr 2026 16:17:42 -0700 [thread overview]
Message-ID: <931b8c3c-8555-4333-a660-e1d78fd67a00@roeck-us.net> (raw)
In-Reply-To: <20260429065955.2113012-4-florin.leotescu@oss.nxp.com>
On Wed, Apr 29, 2026 at 09:59:55AM +0300, florin.leotescu@oss.nxp.com wrote:
> From: Florin Leotescu <florin.leotescu@nxp.com>
>
> Some systems require fans to enter in a defined safe state during system
> shutdown or reboot handoff.
>
> Add support for the optional Device Tree property "fan-shutdown-percent"
> to configure the shutdown PWM duty cycle per fan output.
>
> If the property is present for a fan channel, the driver converts the
> configured percentage value to the corresponding PWM duty cycle and
> applies it during driver shutdown.
>
> If the property is not present, the fan state remains unchanged.
>
> Signed-off-by: Florin Leotescu <florin.leotescu@nxp.com>
I don't know if Sashiko's concerns are real; if sysfs accesses are still
possible during shutdown, lots of drivers have problems. With that in mind,
applied.
Thanks,
Guenter
prev parent reply other threads:[~2026-04-30 23:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 6:59 [PATCH v7 0/3] Support configurable fan PWM at shutdown florin.leotescu
2026-04-29 6:59 ` [PATCH v7 1/3] hwmon: emc2305: Fix fan channel index handling florin.leotescu
2026-04-30 23:13 ` Guenter Roeck
2026-04-29 6:59 ` [PATCH v7 2/3] dt-bindings: hwmon: emc2305: Add fan-shutdown-percent property florin.leotescu
2026-04-29 18:18 ` Conor Dooley
2026-04-30 12:02 ` Florin Leotescu
2026-04-30 18:53 ` Conor Dooley
2026-04-30 23:14 ` Guenter Roeck
2026-04-29 6:59 ` [PATCH v7 3/3] hwmon: emc2305: Support configurable fan PWM at shutdown florin.leotescu
2026-04-30 23:17 ` Guenter Roeck [this message]
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