[PATCH] pmac: fix cpufreq for old tipb 550Mhz

The old 550Mhz titanium powerbook can switch to a lower frequency (500Mhz). A user has been repeately reporting overtemp conditions on his machine at high speed so this simple patch adds support to PowerMac cpufreq for this machine. The difference in frequency isn't big but seem enough to fix that user's problems. The patch has been around for some time now and doesn't seem to cause any problem, so I suppose it could go in now. Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Alain RICHARD <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Oct 1, 2005 · a9487e4 · a9487e4
1 parent 69d3796
commit a9487e4
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/arch/ppc/platforms/pmac_cpufreq.c b/arch/ppc/platforms/pmac_cpufreq.c
@@ -695,6 +695,13 @@ static int __init pmac_cpufreq_setup(void)
 		set_speed_proc = pmu_set_cpu_speed;
 		is_pmu_based = 1;
 	}
+	/* Else check for TiPb 550 */
+	else if (machine_is_compatible("PowerBook3,3") && cur_freq == 550000) {
+		hi_freq = cur_freq;
+		low_freq = 500000;
+		set_speed_proc = pmu_set_cpu_speed;
+		is_pmu_based = 1;
+	}
 	/* Else check for TiPb 400 & 500 */
 	else if (machine_is_compatible("PowerBook3,2")) {
 		/* We only know about the 400 MHz and the 500Mhz model