[PATCH] Export available frequencies on K7 mobile CPUs

[PATCH] Export available frequencies on K7 mobile CPUs

[Kronos]

Hi,
the following patch make powernow-k7.c export supported frequencies via
sysfs. I'm trying to write a scaling deamon and I need to know them.

--- linux-2.6/arch/i386/kernel/cpu/cpufreq/powernow-k7.c.orig	Fri Dec 19 19:27:48 2003
+++ linux-2.6/arch/i386/kernel/cpu/cpufreq/powernow-k7.c	Fri Dec 21 20:42:21 2003
@@ -389,15 +389,29 @@
 	policy->cpuinfo.transition_latency = latency;
 	policy->cur = maximum_speed;
 
+	cpufreq_frequency_table_get_attr(powernow_table, policy->cpu);
+
 	return cpufreq_frequency_table_cpuinfo(policy, powernow_table);
 }
 
+static int powernow_cpu_exit (struct cpufreq_policy *policy) {
+	cpufreq_frequency_table_put_attr(policy->cpu);
+	return 0;
+}
+
+static struct freq_attr* powernow_table_attr[] = {
+	&cpufreq_freq_attr_scaling_available_freqs,
+	NULL,
+};
+
 static struct cpufreq_driver powernow_driver = {
 	.verify 	= powernow_verify,
 	.target 	= powernow_target,
 	.init		= powernow_cpu_init,
+	.exit		= powernow_cpu_exit,
 	.name		= "powernow-k7",
 	.owner		= THIS_MODULE,
+	.attr		= powernow_table_attr,
 };
 
 static int __init powernow_init (void)


Luca
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Prevailence of PS/2 Active Muxed devices?

[J.C. Wren]

	I have an application where I'd like to specifically control which PS/2 aux 
device data is sent/received from/to.  Particularly, on a laptop that has an 
integrated touch pad, I'd like to select the external mouse port.  

	This document http://www.synaptics-uk.com/decaf/utilities/ps2-mux.PDF 
describes what appears to be a rather well thought method for multiple aux 
devices on a single KBC.

	Looking through the kernel sources, I see no handling for this.  From a big 
picture perspective, how does Linux handle a system with an integrated mouse 
pad, and an external PS/2 mouse port?  Is this whole Synaptics idea dead, or 
is support for this planned, or even considered?  Does any one have any 
knowledge the number of KBCs with this muxing?  

	Seeing some of the parties that partcipated in the standards, it would be a 
touch surprising if it just completely died.

	--jc

Re: Prevailence of PS/2 Active Muxed devices?

[J.C. Wren]

	Naturally, after spending 45 minutes looking through mouse and keyboard 
sources in 2.4.21 on the laptop, I find it in i8042.c in the 2.6 tree.

	Now to see if something can actually be done with it...

	--jc

On Tuesday 23 December 2003 13:25 pm, J.C. Wren wrote:
> 	I have an application where I'd like to specifically control which PS/2
> aux device data is sent/received from/to.  Particularly, on a laptop that
> has an integrated touch pad, I'd like to select the external mouse port.
>
> 	This document http://www.synaptics-uk.com/decaf/utilities/ps2-mux.PDF
> describes what appears to be a rather well thought method for multiple aux
> devices on a single KBC.
>
> 	Looking through the kernel sources, I see no handling for this.  From a
> big picture perspective, how does Linux handle a system with an integrated
> mouse pad, and an external PS/2 mouse port?  Is this whole Synaptics idea
> dead, or is support for this planned, or even considered?  Does any one
> have any knowledge the number of KBCs with this muxing?
>
> 	Seeing some of the parties that partcipated in the standards, it would be
> a touch surprising if it just completely died.
>
> 	--jc
>
> -
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Re: Prevailence of PS/2 Active Muxed devices?

[Dmitry Torokhov]

On Tuesday 23 December 2003 01:25 pm, J.C. Wren wrote:
>         Looking through the kernel sources, I see no handling for this.
>  From a big picture perspective, how does Linux handle a system with an
> integrated mouse pad, and an external PS/2 mouse port?  Is this whole
> Synaptics idea dead, or is support for this planned, or even
> considered?  Does any one have any knowledge the number of KBCs with
> this muxing?

No, it's alive and kicking... see drivers/input/serio/i8042.c -
i8042_check_mux()

Dmitry