--- arch/ppc/platforms/pmac_cpufreq.c	2004-08-14 07:37:14.000000000 +0200
+++ arch/ppc/platforms/pmac_cpufreq.c	2004-09-11 19:11:00.509192072 +0200
@@ -553,6 +553,12 @@
 		low_freq = 300000;
 		set_speed_proc = pmu_set_cpu_speed;
 	}
+	/* Else check for TiPb 550 & 667 */
+	else if (machine_is_compatible("PowerBook3,3")) {
+		hi_freq = cur_freq;
+		low_freq = 300000;
+		set_speed_proc = pmu_set_cpu_speed;
+	}
 	/* Else check for 750FX */
 	else if (PVR_VER(mfspr(PVR)) == 0x7000) {
 		if (get_property(cpunode, "dynamic-power-step", NULL) == NULL)