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path: root/drivers/macintosh/windfarm_cpufreq_clamp.c
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Diffstat (limited to 'drivers/macintosh/windfarm_cpufreq_clamp.c')
-rw-r--r--drivers/macintosh/windfarm_cpufreq_clamp.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/macintosh/windfarm_cpufreq_clamp.c b/drivers/macintosh/windfarm_cpufreq_clamp.c
index 607dbaca69c9..81337cd16e80 100644
--- a/drivers/macintosh/windfarm_cpufreq_clamp.c
+++ b/drivers/macintosh/windfarm_cpufreq_clamp.c
@@ -8,6 +8,8 @@
#include <linux/wait.h>
#include <linux/cpufreq.h>
+#include <asm/prom.h>
+
#include "windfarm.h"
#define VERSION "0.3"
@@ -74,6 +76,12 @@ static int __init wf_cpufreq_clamp_init(void)
{
struct wf_control *clamp;
+ /* Don't register on old machines that use therm_pm72 for now */
+ if (machine_is_compatible("PowerMac7,2") ||
+ machine_is_compatible("PowerMac7,3") ||
+ machine_is_compatible("RackMac3,1"))
+ return -ENODEV;
+
clamp = kmalloc(sizeof(struct wf_control), GFP_KERNEL);
if (clamp == NULL)
return -ENOMEM;