linux-kernel - Re: [PATCH] Acer Aspire One Fan Control

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Date:	Wed, 3 Jun 2009 09:39:39 +0200
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Peter Feuerer <peter@...e.net>
Cc:	LKML <linux-kernel@...r.kernel.org>, lenb@...nel.org,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: Re: [PATCH] Acer Aspire One Fan Control

Hi,

On Mon, Jun 01, 2009 at 04:18:20PM +0200, Peter Feuerer wrote:
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 41c6605..bd7617e 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -222,6 +222,13 @@ L:	linux-acenic@...site.dk
> S:	Maintained
> F:	drivers/net/acenic*
>
> +ACER ASPIRE ONE TEMPERATURE AND FAN DRIVER
> +P: Peter Feuerer
> +M: peter@...e.net
> +W: http://piie.net/?section=acerhdf
> +S: Maintained
> +F: drivers/platform/x86/acerhdf.c
> +
> ACER WMI LAPTOP EXTRAS
> P:	Carlos Corbacho
> M:	carlos@...angeworlds.co.uk
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 284ebac..fe14dfd 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -34,6 +34,23 @@ config ACER_WMI
> 	  If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
> 	  here.
>
> +config ACERHDF
> +	tristate "Acer Aspire One temperature and fan driver"
> +	depends on THERMAL && THERMAL_HWMON
> +	---help---
> +	  This is a driver for Acer Aspire One netbooks. It allows to access
> +	  the temperature sensor and to control the fan.
> +
> +	  After loading this driver the BIOS is still in control of the fan.
> +	  To let the kernel handle the fan, do:
> +	  echo -n enabled > /sys/class/thermal/thermal_zone0/mode
> +
> +	  For more information about this driver see
> +	  <http://piie.net/files/acerhdf_README.txt>
> +
> +	  If you have an Acer Aspire One netbook, say Y or M
> +	  here.
> +
> config ASUS_LAPTOP
> 	tristate "Asus Laptop Extras (EXPERIMENTAL)"
> 	depends on ACPI
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index e40c7bd..641b8bf 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -9,6 +9,7 @@ obj-$(CONFIG_COMPAL_LAPTOP)	+= compal-laptop.o
> obj-$(CONFIG_DELL_LAPTOP)	+= dell-laptop.o
> obj-$(CONFIG_DELL_WMI)		+= dell-wmi.o
> obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
> +obj-$(CONFIG_ACERHDF)		+= acerhdf.o
> obj-$(CONFIG_HP_WMI)		+= hp-wmi.o
> obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
> obj-$(CONFIG_SONY_LAPTOP)	+= sony-laptop.o
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> new file mode 100644
> index 0000000..dcfb8b2
> --- /dev/null
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -0,0 +1,533 @@
> +/*
> + * acerhdf - A driver which monitors the temperature
> + *           of the aspire one netbook, turns on/off the fan
> + *           as soon as the upper/lower threshold is reached.
> + *
> + * (C) 2009 - Peter Feuerer     peter (a) piie.net
> + *                              http://piie.net
> + *
> + * Inspired by and many thanks to:
> + *  o acerfand   - Rachel Greenham
> + *  o acer_ec.pl - Michael Kurz     michi.kurz (at) googlemail.com
> + *               - Petr Tomasek     tomasek (#) etf,cuni,cz
> + *               - Carlos Corbacho  cathectic (at) gmail.com
> + *               - Matthew Garrett
> + *               - Borislav Petkov
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License as published by
> + *  the Free Software Foundation; either version 2 of the License, or
> + *  (at your option) any later version.
> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + *  You should have received a copy of the GNU General Public License
> + *  along with this program; if not, write to the Free Software
> + *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> + */
> +
> +#define pr_fmt(fmt) "acerhdf: " fmt

This is new but it's not used anywhere. Maybe some debug leftovers?

> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/fs.h>
> +#include <linux/dmi.h>
> +#include <acpi/acpi_drivers.h>
> +#include <linux/sched.h>

...

-- 
Regards/Gruss,
    Boris.
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