From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-2?Q?Rafa=B3_Bilski?= <rafalbilski@interia.pl>
Subject: [PATCH] Longhaul - Protect user from himself
Date: Mon, 03 Jul 2006 07:39:08 +0200
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To: Dave Jones <davej@codemonkey.org.uk>
Cc: cpufreq@lists.linux.org.uk

This patch depens on "Longhaul - Use hardware support".

Older CPU's require transition time >=3D1ms.
Print message for C7 user (this is based on real story).

Signed-off-by: Rafa=B3 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 0=
7:33:38.000000000 +0200
@@ -633,6 +633,13 @@ static int __init longhaul_cpu_init(stru
 		break;
 	};
=20
+#if (CONFIG_HZ > 250)
+	if (longhaul_version !=3D TYPE_POWERSAVER) {
+		printk (KERN_INFO PFX "Timer frequency to high. Aborting\n");
+		return -EINVAL;
+	}
+#endif
+
 	ret =3D longhaul_get_ranges();
 	if (ret !=3D 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-Sta=
tes driver\".\n");
 	}
=20
 	return -ENODEV;

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