linux-kernel - Re: [lm-sensors] lm90 driver no longer working on PCs in 3.13

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Message-ID: <52E71708.7010607@roeck-us.net>
Date:	Mon, 27 Jan 2014 18:33:44 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Mark Brown <broonie@...nel.org>
CC:	Jean Delvare <khali@...ux-fr.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Liam Girdwood <lgirdwood@...il.com>, Wei Ni <wni@...dia.com>,
	linux-kernel@...r.kernel.org,
	LM Sensors <lm-sensors@...sensors.org>
Subject: Re: [lm-sensors] lm90 driver no longer working on PCs in 3.13

On 01/27/2014 03:58 PM, Mark Brown wrote:
> On Mon, Jan 27, 2014 at 03:41:35PM -0800, Guenter Roeck wrote:
>
>> I'll test Mark's two patches on my system and let you know the results.
>> After looking some more into it, those _may_ actually fix the problem at least
>> for systems supporting ACPI. No promise, though, and I am not sure if that
>> would be sufficient (it may still not work on non-ACPI PCs). But then who
>
> They should fix ACPI systems, if they don't we need to fix them further
> - that case should just work, it was an oversight not to have a patch
> like the ACPI one in already.  I'm not sure how many non-ACPI PCs still
> exist, we're definitely talking about things over 10 years old (even
> before PCs became ACPI only they started to have ACPI present which
> should be sufficient).
>
> Jean, I'm doing a writeup but it's probably not going to be done today.
>

I confirmed that your two patches ("regulator: core: Correct default
return value for full constraints" and "ACPI: Flag use of ACPI and ACPI
idioms for power supplies to regulator API") together fix the problem
with the lm90 driver, at least for ACPI based systems.

Thanks,
Guenter

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