diff --git a/arch/powerpc/cpu/mpc85xx/release.S b/arch/powerpc/cpu/mpc85xx/release.S
index 467ea10..a4a21b0 100644
--- a/arch/powerpc/cpu/mpc85xx/release.S
+++ b/arch/powerpc/cpu/mpc85xx/release.S
@@ -154,16 +154,12 @@
 	ori	r3,r3,toreset(__spin_table_addr)@l
 	lwz	r3,0(r3)
 
-	/*
-	 * r10 has the base address for the entry.
-	 * we cannot access it yet before setting up a new TLB
-	 */
 	mfspr	r0,SPRN_PIR
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 /*
  * PIR definition for Chassis 2
  * 0-17 Reserved (logic 0s)
- * 8-19 CHIP_ID,    2'b00      - SoC 1
+ * 18-19 CHIP_ID,    2'b00      - SoC 1
  *                  all others - reserved
  * 20-24 CLUSTER_ID 5'b00000   - CCM 1
  *                  all others - reserved
@@ -177,32 +173,33 @@
  *                       2'b11 - core 3
  * 29-31 THREAD_ID       3'b000 - thread 0
  *                       3'b001 - thread 1
+ *
+ * Power-on PIR increments threads by 0x01, cores within a cluster by 0x08
+ * and clusters by 0x20.
+ *
+ * We renumber PIR so that all threads in the system are consecutive.
  */
-	rlwinm  r4,r0,29,25,31
+
+	rlwinm	r8,r0,29,0x03	/* r8 = core within cluster */
+	srwi	r10,r0,5	/* r10 = cluster */
+
+	mulli	r5,r10,CONFIG_SYS_FSL_CORES_PER_CLUSTER
+	add	r5,r5,r8	/* for spin table index */
+	mulli	r4,r5,CONFIG_SYS_FSL_THREADS_PER_CORE	/* for PIR */
 #elif	defined(CONFIG_E500MC)
 	rlwinm	r4,r0,27,27,31
+	mr	r5,r4
 #else
 	mr	r4,r0
+	mr	r5,r4
 #endif
-	slwi	r8,r4,6	/* spin table is padded to 64 byte */
-	add	r10,r3,r8
 
-#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
-	mfspr	r0,SPRN_PIR
 	/*
-	 * core 0 thread 0: pir reset value 0x00, new pir 0
-	 * core 0 thread 1: pir reset value 0x01, new pir 1
-	 * core 1 thread 0: pir reset value 0x08, new pir 2
-	 * core 1 thread 1: pir reset value 0x09, new pir 3
-	 * core 2 thread 0: pir reset value 0x10, new pir 4
-	 * core 2 thread 1: pir reset value 0x11, new pir 5
-	 * etc.
-	 *
-	 * Only thread 0 of each core will be running, updating PIR doesn't
-	 * need to deal with the thread bits.
+	 * r10 has the base address for the entry.
+	 * we cannot access it yet before setting up a new TLB
 	 */
-	rlwinm	r4,r0,30,24,30
-#endif
+	slwi	r8,r5,6	/* spin table is padded to 64 byte */
+	add	r10,r3,r8
 
 	mtspr	SPRN_PIR,r4	/* write to PIR register */
 
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index f00b1ab..a4d6e9c 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -112,23 +112,20 @@
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	/*
 	 * Each cluster has up to 4 cores, sharing the same PLL selection.
-	 * The cluster assignment is fixed per SoC. There is no way identify the
-	 * assignment so far, presuming the "first configuration" which is to
-	 * fill the lower cluster group first before moving up to next group.
-	 * PLL1, PLL2, PLL3 are cluster group A, feeding core 0~3 on cluster 1
-	 * and core 4~7 on cluster 2
-	 * PLL4, PLL5, PLL6 are cluster group B, feeding core 8~11 on cluster 3
-	 * and core 12~15 on cluster 4 if existing
+	 * The cluster assignment is fixed per SoC. PLL1, PLL2, PLL3 are
+	 * cluster group A, feeding cores on cluster 1 and cluster 2.
+	 * PLL4, PLL5, PLL6 are cluster group B, feeding cores on cluster 3
+	 * and cluster 4 if existing.
 	 */
 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
-		u32 c_pll_sel = (in_be32(&clk->clkc0csr + (cpu / 4) * 8) >> 27)
+		int cluster = fsl_qoriq_core_to_cluster(cpu);
+		u32 c_pll_sel = (in_be32(&clk->clkcsr[cluster].clkcncsr) >> 27)
 				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 		if (cplx_pll > 3)
 			printf("Unsupported architecture configuration"
 				" in function %s\n", __func__);
-		cplx_pll += (cpu / 8) * 3;
-
+		cplx_pll += (cluster / 2) * 3;
 		sysInfo->freqProcessor[cpu] =
 			 freqCC_PLL[cplx_pll] / core_cplx_PLL_div[c_pll_sel];
 	}
@@ -240,7 +237,8 @@
 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 
 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
-		u32 c_pll_sel = (in_be32(&clk->clkc0csr + cpu*8) >> 27) & 0xf;
+		u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
+				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 
 		sysInfo->freqProcessor[cpu] =
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index 23e008e..bc26855 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -103,35 +103,70 @@
 };
 
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
+static inline u32 init_type(u32 cluster, int init_id)
+{
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	u32 idx = (cluster >> (init_id * 8)) & TP_CLUSTER_INIT_MASK;
+	u32 type = in_be32(&gur->tp_ityp[idx]);
+
+	if (type & TP_ITYP_AV)
+		return type;
+
+	return 0;
+}
+
 u32 compute_ppc_cpumask(void)
 {
-	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	int i = 0, count = 0;
-	u32 cluster, mask = 0;
+	u32 cluster, type, mask = 0;
 
 	do {
 		int j;
-		cluster = in_be32(&gur->tp_cluster[i++].lower);
-		for (j = 0; j < 4; j++) {
-			u32 idx = (cluster >> (j*8)) & TP_CLUSTER_INIT_MASK;
-			u32 type = in_be32(&gur->tp_ityp[idx]);
-
-			if (type & TP_ITYP_AV) {
+		cluster = in_be32(&gur->tp_cluster[i].lower);
+		for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
+			type = init_type(cluster, j);
+			if (type) {
 				if (TP_ITYP_TYPE(type) == TP_ITYP_TYPE_PPC)
 					mask |= 1 << count;
+				count++;
 			}
-			count++;
 		}
+		i++;
 	} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
 
 	return mask;
 }
+
+int fsl_qoriq_core_to_cluster(unsigned int core)
+{
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	int i = 0, count = 0;
+	u32 cluster;
+
+	do {
+		int j;
+		cluster = in_be32(&gur->tp_cluster[i].lower);
+		for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
+			if (init_type(cluster, j)) {
+				if (count == core)
+					return i;
+				count++;
+			}
+		}
+		i++;
+	} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
+
+	return -1;	/* cannot identify the cluster */
+}
+
 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 /*
  * Before chassis genenration 2, the cpumask should be hard-coded.
  * In case of cpu type unknown or cpumask unset, use 1 as fail save.
  */
 #define compute_ppc_cpumask()	1
+#define fsl_qoriq_core_to_cluster(x) x
 #endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 
 static struct cpu_type cpu_type_unknown = CPU_TYPE_ENTRY(Unknown, Unknown, 0);