linux-kernel - Re: [PATCH 2/2] hwmon: Allow to compile dell-smm-hwmon driver without /proc/i8k

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Date:	Sat, 28 Mar 2015 22:19:04 +0000
From:	Steven Honeyman <stevenhoneyman@...il.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jean Delvare <jdelvare@...e.de>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Jochen Eisinger <jochen@...guin-breeder.org>,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [PATCH 2/2] hwmon: Allow to compile dell-smm-hwmon driver without /proc/i8k

On 28 March 2015 at 22:00, Pali Rohár <pali.rohar@...il.com> wrote:
> On Saturday 28 March 2015 13:54:51 Steven Honeyman wrote:
>> i8k-virtual-0
>> Adapter: Virtual device
>> Processor Fan: 3171 RPM
>> CPU:            +52.0°C
>> Ambient:        +46.0°C
>> SODIMM:         +40.0°C
>> -----
>>
>> Ambient and SODIMM look swapped - but it's probably just
>> another Dell error. I really need to look at getting coreboot
>> on this thing.
>>
>
> Both patches do not change any code. So there should not be any
> type swapped with or without my patch.
>
> Cpu type is requested via SMM in same way as it is doing old DOS
> executable. So there can be maybe problem in DELL SMM handler too
> or maybe just I did not understand correctly assembler dump of
> DOS executable...
>

Is there some way that I can find out for you? I've got a Windows
partition somewhere, or DOS boot disk should be easy enough if this
program works on new hardware.
If I knew where the sensors were placed I could cool one of them.


On 28 March 2015 at 22:04, Pali Rohár <pali.rohar@...il.com> wrote:
> I think that setting CONFIG_I8K to tristate (Y/M/N) does not make
> sense... CONFIG_I8K just control if /proc/i8k will be compiled
> into dell-smm-hwmon or not.

Try and select dell-smm-hwmon as a module, with i8k enabled as well...


On 28 March 2015 at 22:06, Paul Bolle <pebolle@...cali.nl> wrote:
> On Sat, 2015-03-28 at 22:55 +0100, Pali Rohár wrote:
>> I have tested compilation only with out of tree make command with
>> manual CONFIG_SENSORS_DELL_SMM and CONFIG_I8K options.
>
> Not sure what you mean here. I can't get things past this error:
>     drivers/hwmon/Kconfig:1721: syntax error
>     drivers/hwmon/Kconfig:1720: invalid option

--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1705,8 +1705,8 @@

 config SENSORS_DELL_SMM
     tristate "Dell laptop SMM BIOS hwmon driver"
-    depends ON X86
-    ---help---
+    depends on X86
+    help
       This hwmon driver adds support for reporting temperature of different
       sensors and controls the fans on Dell laptops via System Management
       Mode provided by Dell BIOS.
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