linux-kernel - Re: [PATCH] thermal/drivers/sun8i: Don't fail probe due to zone registration failure

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Message-ID: <ZL08A8J7fLJ3bJsl@finisterre.sirena.org.uk>
Date:   Sun, 23 Jul 2023 15:41:07 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     Icenowy Zheng <uwu@...nowy.me>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Yangtao Li <tiny.windzz@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Hugh Dickins <hughd@...gle.com>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal/drivers/sun8i: Don't fail probe due to zone
 registration failure

On Sun, Jul 23, 2023 at 11:40:34AM +0200, Daniel Lezcano wrote:
> On 22/07/2023 18:46, Mark Brown wrote:

> > It did seem to be a bit of an excessively strict requirement, I was
> > going to poke at that myself.  It does seem worthwhile doing the change
> > in the sun8i driver anyway, there might be some other issue that causes
> > registration to fail which would have the same issue.

> Why do you want a thermal zone if there is no trip point ?

It at least allows you to see what the hardware is monitoring.  It's not
terribly useful for thermal management (unless you're doing to try to do
something in userspace I guess) but it seems more helpful than
completely failing to register, especially given the knock on effects
when a single device registers multiple zones.

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