diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 4fb5938ce6d389b8b01b9eac48a35b37159cd26b..e27d9d1b6e67232b75d9e99c50a70d051b282866 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2035,39 +2035,50 @@ static void __init fixup_device_tree_maple(void)
 #endif
 
 #ifdef CONFIG_PPC_CHRP
-/* Pegasos and BriQ lacks the "ranges" property in the isa node */
+/*
+ * Pegasos and BriQ lacks the "ranges" property in the isa node
+ * Pegasos needs decimal IRQ 14/15, not hexadecimal
+ */
 static void __init fixup_device_tree_chrp(void)
 {
-	phandle isa;
-	u32 isa_ranges[6];
+	phandle ph;
+	u32 prop[6];
 	u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
 	char *name;
 	int rc;
 
 	name = "/pci@80000000/isa@c";
-	isa = call_prom("finddevice", 1, 1, ADDR(name));
-	if (!PHANDLE_VALID(isa)) {
+	ph = call_prom("finddevice", 1, 1, ADDR(name));
+	if (!PHANDLE_VALID(ph)) {
 		name = "/pci@ff500000/isa@6";
-		isa = call_prom("finddevice", 1, 1, ADDR(name));
+		ph = call_prom("finddevice", 1, 1, ADDR(name));
 		rloc = 0x01003000; /* IO space; PCI device = 6 */
 	}
-	if (!PHANDLE_VALID(isa))
-		return;
-
-	rc = prom_getproplen(isa, "ranges");
-	if (rc != 0 && rc != PROM_ERROR)
-		return;
-
-	prom_printf("Fixing up missing ISA range on Pegasos...\n");
+	if (PHANDLE_VALID(ph)) {
+		rc = prom_getproplen(ph, "ranges");
+		if (rc == 0 || rc == PROM_ERROR) {
+			prom_printf("Fixing up missing ISA range on Pegasos...\n");
+
+			prop[0] = 0x1;
+			prop[1] = 0x0;
+			prop[2] = rloc;
+			prop[3] = 0x0;
+			prop[4] = 0x0;
+			prop[5] = 0x00010000;
+			prom_setprop(ph, name, "ranges", prop, sizeof(prop));
+		}
+	}
 
-	isa_ranges[0] = 0x1;
-	isa_ranges[1] = 0x0;
-	isa_ranges[2] = rloc;
-	isa_ranges[3] = 0x0;
-	isa_ranges[4] = 0x0;
-	isa_ranges[5] = 0x00010000;
-	prom_setprop(isa, name, "ranges",
-			isa_ranges, sizeof(isa_ranges));
+	name = "/pci@80000000/ide@C,1";
+	ph = call_prom("finddevice", 1, 1, ADDR(name));
+	if (PHANDLE_VALID(ph)) {
+		prom_printf("Fixing up IDE interrupt on Pegasos...\n");
+		prop[0] = 14;
+		prop[1] = 0x0;
+		prop[2] = 15;
+		prop[3] = 0x0;
+		prom_setprop(ph, name, "interrupts", prop, 4*sizeof(u32));
+	}
 }
 #else
 #define fixup_device_tree_chrp()
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index a508550c4095cecb0a43ffb474ca4d94b531d30b..8cc5423892ac09365143f2f4aea9aad52cf1a6cd 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -35,10 +35,6 @@
 #include <linux/ide.h>
 #include <asm/io.h>
 
-#ifdef CONFIG_PPC_CHRP
-#include <asm/processor.h>
-#endif
-
 #include "ide-timing.h"
 
 #define DISPLAY_VIA_TIMINGS
@@ -436,13 +432,6 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
 	hwif->tuneproc = &via82cxxx_tune_drive;
 	hwif->speedproc = &via_set_drive;
 
-
-#ifdef CONFIG_PPC_CHRP
-	if(machine_is(chrp) && _chrp_type == _CHRP_Pegasos) {
-		hwif->irq = hwif->channel ? 15 : 14;
-	}
-#endif
-
 	for (i = 0; i < 2; i++) {
 		hwif->drives[i].io_32bit = 1;
 		hwif->drives[i].unmask = (vdev->via_config->flags & VIA_NO_UNMASK) ? 0 : 1;