From: "Rafał Bilski" <rafalbilski@interia.pl>
To: Dave Jones <davej@codemonkey.org.uk>
Cc: cpufreq@lists.linux.org.uk
Subject: [PATCH] Longhaul - Protect user from himself
Date: Mon, 03 Jul 2006 07:39:08 +0200 [thread overview]
Message-ID: <44A8AD7C.5030402@interia.pl> (raw)
This patch depens on "Longhaul - Use hardware support".
Older CPU's require transition time >=1ms.
Print message for C7 user (this is based on real story).
Signed-off-by: Rafa³ Bilski <rafalbilski@interia.pl>
---
--- linux-2.6.17-git20/arch/i386/kernel/cpu/cpufreq/longhaul.c.orig 2006-07-03 06:43:54.000000000 +0200
+++ linux-2.6.17-git20/arch/i386/kernel/cpu/cpufreq/longhaul.c 2006-07-03 07:33:38.000000000 +0200
@@ -633,6 +633,13 @@ static int __init longhaul_cpu_init(stru
break;
};
+#if (CONFIG_HZ > 250)
+ if (longhaul_version != TYPE_POWERSAVER) {
+ printk (KERN_INFO PFX "Timer frequency to high. Aborting\n");
+ return -EINVAL;
+ }
+#endif
+
ret = longhaul_get_ranges();
if (ret != 0)
return ret;
@@ -691,8 +698,9 @@ static int __init longhaul_init(void)
switch (c->x86_model) {
case 6 ... 9:
return cpufreq_register_driver(&longhaul_driver);
- default:
- printk (KERN_INFO PFX "Unknown VIA CPU. Contact davej@codemonkey.org.uk\n");
+ }
+ if (c->x86_model > 9) {
+ printk(KERN_INFO PFX "VIA C7 (or better) CPU. Use \"ACPI Processor P-States driver\".\n");
}
return -ENODEV;
------------------------------------------------------------------------
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next reply other threads:[~2006-07-03 5:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-03 5:39 Rafał Bilski [this message]
2006-07-06 19:50 ` [PATCH] Longhaul - Protect user from himself Dave Jones
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