diff --git a/arch/powerpc/platforms/powermac/cpufreq.c b/arch/powerpc/platforms/powermac/cpufreq.c
index 6d32d99402be..bcd9224f3f90 100644
--- a/arch/powerpc/platforms/powermac/cpufreq.c
+++ b/arch/powerpc/platforms/powermac/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
diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c
index 2cba670c71b7..243a24fd025a 100644
--- a/arch/powerpc/platforms/powermac/feature.c
+++ b/arch/powerpc/platforms/powermac/feature.c
@@ -2382,6 +2382,10 @@ static struct pmac_mb_def pmac_mb_defs[] = {
 		PMAC_TYPE_UNKNOWN_INTREPID,	intrepid_features,
 		PMAC_MB_MAY_SLEEP | PMAC_MB_HAS_FW_POWER | PMAC_MB_MOBILE,
 	},
+	{	"PowerBook6,7",			"iBook G4",
+		PMAC_TYPE_UNKNOWN_INTREPID,	intrepid_features,
+		PMAC_MB_MAY_SLEEP | PMAC_MB_HAS_FW_POWER | PMAC_MB_MOBILE,
+	},
 	{	"PowerBook6,8",			"PowerBook G4 12\"",
 		PMAC_TYPE_UNKNOWN_INTREPID,	intrepid_features,
 		PMAC_MB_MAY_SLEEP | PMAC_MB_HAS_FW_POWER | PMAC_MB_MOBILE,
diff --git a/arch/powerpc/platforms/powermac/time.c b/arch/powerpc/platforms/powermac/time.c
index ff6adff36cb8..edb9fcc64790 100644
--- a/arch/powerpc/platforms/powermac/time.c
+++ b/arch/powerpc/platforms/powermac/time.c
@@ -195,7 +195,7 @@ via_calibrate_decr(void)
 		;
 	dend = get_dec();
 
-	tb_ticks_per_jiffy = (dstart - dend) / (6 * (HZ/100));
+	tb_ticks_per_jiffy = (dstart - dend) / ((6 * HZ)/100);
 	tb_to_us = mulhwu_scale_factor(dstart - dend, 60000);
 
 	printk(KERN_INFO "via_calibrate_decr: ticks per jiffy = %u (%u ticks)\n",
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index d096faf4191e..f80ec8daf122 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -88,7 +88,7 @@ extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,
 		int nelems, enum dma_data_direction direction);
 
 extern void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size,
-		dma_addr_t *dma_handle, unsigned int __nocast flag);
+		dma_addr_t *dma_handle, gfp_t flag);
 extern void iommu_free_coherent(struct iommu_table *tbl, size_t size,
 		void *vaddr, dma_addr_t dma_handle);
 extern dma_addr_t iommu_map_single(struct iommu_table *tbl, void *vaddr,