[SPARC64]: Use in-kernel PROM tree for EBUS and ISA.

Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 338 insertions, 338 deletions

diff --git a/arch/sparc64/kernel/auxio.c b/arch/sparc64/kernel/auxio.c
index 8852c20c8d99..db36b66a4e3c 100644
--- a/arch/sparc64/kernel/auxio.c
+++ b/arch/sparc64/kernel/auxio.c
@@ -136,7 +136,7 @@ found_sdev:
 
 		for_each_ebus(ebus) {
 			for_each_ebusdev(edev, ebus) {
-				if (!strcmp(edev->prom_name, "auxio"))
+				if (!strcmp(edev->prom_node->name, "auxio"))
 					goto ebus_done;
 			}
 		}
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
index 3125a5b49775..919a91d9e5de 100644
--- a/arch/sparc64/kernel/ebus.c
+++ b/arch/sparc64/kernel/ebus.c
@@ -285,36 +285,38 @@ static inline void *ebus_alloc(size_t size)
 
 static void __init ebus_ranges_init(struct linux_ebus *ebus)
 {
-	int success;
+	struct linux_prom_ebus_ranges *rngs;
+	int len;
 
 	ebus->num_ebus_ranges = 0;
-	success = prom_getproperty(ebus->prom_node, "ranges",
-				   (char *)ebus->ebus_ranges,
-				   sizeof(ebus->ebus_ranges));
-	if (success != -1)
-		ebus->num_ebus_ranges = (success/sizeof(struct linux_prom_ebus_ranges));
+	rngs = of_get_property(ebus->prom_node, "ranges", &len);
+	if (rngs) {
+		memcpy(ebus->ebus_ranges, rngs, len);
+		ebus->num_ebus_ranges =
+			(len / sizeof(struct linux_prom_ebus_ranges));
+	}
 }
 
 static void __init ebus_intmap_init(struct linux_ebus *ebus)
 {
-	int success;
+	struct linux_prom_ebus_intmap *imap;
+	struct linux_prom_ebus_intmask *imask;
+	int len;
 
 	ebus->num_ebus_intmap = 0;
-	success = prom_getproperty(ebus->prom_node, "interrupt-map",
-				   (char *)ebus->ebus_intmap,
-				   sizeof(ebus->ebus_intmap));
-	if (success == -1)
+	imap = of_get_property(ebus->prom_node, "interrupt-map", &len);
+	if (!imap)
 		return;
 
-	ebus->num_ebus_intmap = (success/sizeof(struct linux_prom_ebus_intmap));
+	memcpy(ebus->ebus_intmap, imap, len);
+	ebus->num_ebus_intmap = (len / sizeof(struct linux_prom_ebus_intmap));
 
-	success = prom_getproperty(ebus->prom_node, "interrupt-map-mask",
-				   (char *)&ebus->ebus_intmask,
-				   sizeof(ebus->ebus_intmask));
-	if (success == -1) {
-		prom_printf("%s: can't get interrupt-map-mask\n", __FUNCTION__);
+	imask = of_get_property(ebus->prom_node, "interrupt-map-mask", &len);
+	if (!imask) {
+		prom_printf("EBUS: can't get interrupt-map-mask\n");
 		prom_halt();
 	}
+	memcpy(&ebus->ebus_intmask, imask, sizeof(ebus->ebus_intmask));
 }
 
 int __init ebus_intmap_match(struct linux_ebus *ebus,
@@ -341,19 +343,23 @@ int __init ebus_intmap_match(struct linux_ebus *ebus,
 	return -1;
 }
 
-void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
-			    struct linux_ebus_child *dev, int non_standard_regs)
+void __init fill_ebus_child(struct device_node *dp,
+			    struct linux_prom_registers *preg,
+			    struct linux_ebus_child *dev,
+			    int non_standard_regs)
 {
-	int regs[PROMREG_MAX];
-	int irqs[PROMREG_MAX];
+	int *regs;
+	int *irqs;
 	int i, len;
 
-	dev->prom_node = node;
-	prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
-	printk(" (%s)", dev->prom_name);
+	dev->prom_node = dp;
+	printk(" (%s)", dp->name);
 
-	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
-	dev->num_addrs = len / sizeof(regs[0]);
+	regs = of_get_property(dp, "reg", &len);
+	if (!regs)
+		dev->num_addrs = 0;
+	else
+		dev->num_addrs = len / sizeof(regs[0]);
 
 	if (non_standard_regs) {
 		/* This is to handle reg properties which are not
@@ -370,21 +376,21 @@ void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
 			int rnum = regs[i];
 			if (rnum >= dev->parent->num_addrs) {
 				prom_printf("UGH: property for %s was %d, need < %d\n",
-					    dev->prom_name, len, dev->parent->num_addrs);
-				panic(__FUNCTION__);
+					    dp->name, len, dev->parent->num_addrs);
+				prom_halt();
 			}
 			dev->resource[i].start = dev->parent->resource[i].start;
 			dev->resource[i].end = dev->parent->resource[i].end;
 			dev->resource[i].flags = IORESOURCE_MEM;
-			dev->resource[i].name = dev->prom_name;
+			dev->resource[i].name = dp->name;
 		}
 	}
 
 	for (i = 0; i < PROMINTR_MAX; i++)
 		dev->irqs[i] = PCI_IRQ_NONE;
 
-	len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
-	if ((len == -1) || (len == 0)) {
+	irqs = of_get_property(dp, "interrupts", &len);
+	if (!irqs) {
 		dev->num_irqs = 0;
 		/*
 		 * Oh, well, some PROMs don't export interrupts
@@ -392,8 +398,8 @@ void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
 		 *
 		 * Be smart about PS/2 keyboard and mouse.
 		 */
-		if (!strcmp(dev->parent->prom_name, "8042")) {
-			if (!strcmp(dev->prom_name, "kb_ps2")) {
+		if (!strcmp(dev->parent->prom_node->name, "8042")) {
+			if (!strcmp(dev->prom_node->name, "kb_ps2")) {
 				dev->num_irqs = 1;
 				dev->irqs[0] = dev->parent->irqs[0];
 			} else {
@@ -423,32 +429,32 @@ void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
 
 static int __init child_regs_nonstandard(struct linux_ebus_device *dev)
 {
-	if (!strcmp(dev->prom_name, "i2c") ||
-	    !strcmp(dev->prom_name, "SUNW,lombus"))
+	if (!strcmp(dev->prom_node->name, "i2c") ||
+	    !strcmp(dev->prom_node->name, "SUNW,lombus"))
 		return 1;
 	return 0;
 }
 
-void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
+void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
 {
-	struct linux_prom_registers regs[PROMREG_MAX];
+	struct linux_prom_registers *regs;
 	struct linux_ebus_child *child;
-	int irqs[PROMINTR_MAX];
+	int *irqs;
 	int i, n, len;
 
-	dev->prom_node = node;
-	prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
-	printk(" [%s", dev->prom_name);
+	dev->prom_node = dp;
 
-	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
-	if (len == -1) {
+	printk(" [%s", dp->name);
+
+	regs = of_get_property(dp, "reg", &len);
+	if (!regs) {
 		dev->num_addrs = 0;
 		goto probe_interrupts;
 	}
 
 	if (len % sizeof(struct linux_prom_registers)) {
 		prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
-			    dev->prom_name, len,
+			    dev->prom_node->name, len,
 			    (int)sizeof(struct linux_prom_registers));
 		prom_halt();
 	}
@@ -466,7 +472,7 @@ void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
 		dev->resource[i].end    =
 			(dev->resource[i].start + (unsigned long)regs[i].reg_size - 1UL);
 		dev->resource[i].flags  = IORESOURCE_MEM;
-		dev->resource[i].name   = dev->prom_name;
+		dev->resource[i].name   = dev->prom_node->name;
 		request_resource(&dev->bus->self->resource[n],
 				 &dev->resource[i]);
 	}
@@ -475,8 +481,8 @@ probe_interrupts:
 	for (i = 0; i < PROMINTR_MAX; i++)
 		dev->irqs[i] = PCI_IRQ_NONE;
 
-	len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
-	if ((len == -1) || (len == 0)) {
+	irqs = of_get_property(dp, "interrupts", &len);
+	if (!irqs) {
 		dev->num_irqs = 0;
 	} else {
 		dev->num_irqs = len / sizeof(irqs[0]);
@@ -497,7 +503,8 @@ probe_interrupts:
 		}
 	}
 
-	if ((node = prom_getchild(node))) {
+	dp = dp->child;
+	if (dp) {
 		printk(" ->");
 		dev->children = ebus_alloc(sizeof(struct linux_ebus_child));
 
@@ -505,18 +512,18 @@ probe_interrupts:
 		child->next = NULL;
 		child->parent = dev;
 		child->bus = dev->bus;
-		fill_ebus_child(node, &regs[0],
-				child, child_regs_nonstandard(dev));
+		fill_ebus_child(dp, regs, child,
+				child_regs_nonstandard(dev));
 
-		while ((node = prom_getsibling(node)) != 0) {
+		while ((dp = dp->sibling) != NULL) {
 			child->next = ebus_alloc(sizeof(struct linux_ebus_child));
 
 			child = child->next;
 			child->next = NULL;
 			child->parent = dev;
 			child->bus = dev->bus;
-			fill_ebus_child(node, &regs[0],
-					child, child_regs_nonstandard(dev));
+			fill_ebus_child(dp, regs, child,
+					child_regs_nonstandard(dev));
 		}
 	}
 	printk("]");
@@ -543,7 +550,8 @@ void __init ebus_init(void)
 	struct linux_ebus *ebus;
 	struct pci_dev *pdev;
 	struct pcidev_cookie *cookie;
-	int nd, ebusnd, is_rio;
+	struct device_node *dp;
+	int is_rio;
 	int num_ebus = 0;
 
 	pdev = find_next_ebus(NULL, &is_rio);
@@ -553,20 +561,22 @@ void __init ebus_init(void)
 	}
 
 	cookie = pdev->sysdata;
-	ebusnd = cookie->prom_node->node;
+	dp = cookie->prom_node;
 
 	ebus_chain = ebus = ebus_alloc(sizeof(struct linux_ebus));
 	ebus->next = NULL;
 	ebus->is_rio = is_rio;
 
-	while (ebusnd) {
+	while (dp) {
+		struct device_node *child;
+
 		/* SUNW,pci-qfe uses four empty ebuses on it.
 		   I think we should not consider them here,
 		   as they have half of the properties this
 		   code expects and once we do PCI hot-plug,
 		   we'd have to tweak with the ebus_chain
 		   in the runtime after initialization. -jj */
-		if (!prom_getchild (ebusnd)) {
+		if (!dp->child) {
 			pdev = find_next_ebus(pdev, &is_rio);
 			if (!pdev) {
 				if (ebus == ebus_chain) {
@@ -578,22 +588,21 @@ void __init ebus_init(void)
 			}
 			ebus->is_rio = is_rio;
 			cookie = pdev->sysdata;
-			ebusnd = cookie->prom_node->node;
+			dp = cookie->prom_node;
 			continue;
 		}
 		printk("ebus%d:", num_ebus);
 
-		prom_getstring(ebusnd, "name", ebus->prom_name, sizeof(ebus->prom_name));
 		ebus->index = num_ebus;
-		ebus->prom_node = ebusnd;
+		ebus->prom_node = dp;
 		ebus->self = pdev;
 		ebus->parent = pbm = cookie->pbm;
 
 		ebus_ranges_init(ebus);
 		ebus_intmap_init(ebus);
 
-		nd = prom_getchild(ebusnd);
-		if (!nd)
+		child = dp->child;
+		if (!child)
 			goto next_ebus;
 
 		ebus->devices = ebus_alloc(sizeof(struct linux_ebus_device));
@@ -602,16 +611,16 @@ void __init ebus_init(void)
 		dev->next = NULL;
 		dev->children = NULL;
 		dev->bus = ebus;
-		fill_ebus_device(nd, dev);
+		fill_ebus_device(child, dev);
 
-		while ((nd = prom_getsibling(nd)) != 0) {
+		while ((child = child->sibling) != NULL) {
 			dev->next = ebus_alloc(sizeof(struct linux_ebus_device));
 
 			dev = dev->next;
 			dev->next = NULL;
 			dev->children = NULL;
 			dev->bus = ebus;
-			fill_ebus_device(nd, dev);
+			fill_ebus_device(child, dev);
 		}
 
 	next_ebus:
@@ -622,7 +631,7 @@ void __init ebus_init(void)
 			break;
 
 		cookie = pdev->sysdata;
-		ebusnd = cookie->prom_node->node;
+		dp = cookie->prom_node;
 
 		ebus->next = ebus_alloc(sizeof(struct linux_ebus));
 		ebus = ebus->next;
diff --git a/arch/sparc64/kernel/isa.c b/arch/sparc64/kernel/isa.c
index ae02c3820eab..8c8c5a491ad6 100644
--- a/arch/sparc64/kernel/isa.c
+++ b/arch/sparc64/kernel/isa.c
@@ -15,23 +15,19 @@ static void __init fatal_err(const char *reason)
 static void __init report_dev(struct sparc_isa_device *isa_dev, int child)
 {
 	if (child)
-		printk(" (%s)", isa_dev->prom_name);
+		printk(" (%s)", isa_dev->prom_node->name);
 	else
-		printk(" [%s", isa_dev->prom_name);
+		printk(" [%s", isa_dev->prom_node->name);
 }
 
-static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev,
-					struct linux_prom_registers *pregs,
-					int pregs_size)
+static struct linux_prom_registers * __init
+isa_dev_get_resource(struct sparc_isa_device *isa_dev)
 {
+	struct linux_prom_registers *pregs;
 	unsigned long base, len;
 	int prop_len;
 
-	prop_len = prom_getproperty(isa_dev->prom_node, "reg",
-				    (char *) pregs, pregs_size);
-
-	if (prop_len <= 0)
-		return;
+	pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
 
 	/* Only the first one is interesting. */
 	len = pregs[0].reg_size;
@@ -42,10 +38,12 @@ static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev,
 	isa_dev->resource.start = base;
 	isa_dev->resource.end   = (base + len - 1UL);
 	isa_dev->resource.flags = IORESOURCE_IO;
-	isa_dev->resource.name  = isa_dev->prom_name;
+	isa_dev->resource.name  = isa_dev->prom_node->name;
 
 	request_resource(&isa_dev->bus->parent->io_space,
 			 &isa_dev->resource);
+
+	return pregs;
 }
 
 /* I can't believe they didn't put a real INO in the isa device
@@ -98,8 +96,8 @@ static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev,
 {
 	int irq_prop;
 
-	irq_prop = prom_getintdefault(isa_dev->prom_node,
-				      "interrupts", -1);
+	irq_prop = of_getintprop_default(isa_dev->prom_node,
+					 "interrupts", -1);
 	if (irq_prop <= 0) {
 		goto no_irq;
 	} else {
@@ -141,16 +139,15 @@ no_irq:
 
 static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
 {
-	int node = prom_getchild(parent_isa_dev->prom_node);
+	struct device_node *dp = parent_isa_dev->prom_node->child;
 
-	if (node == 0)
+	if (!dp)
 		return;
 
 	printk(" ->");
-	while (node != 0) {
-		struct linux_prom_registers regs[PROMREG_MAX];
+	while (dp) {
+		struct linux_prom_registers *regs;
 		struct sparc_isa_device *isa_dev;
-		int prop_len;
 
 		isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
 		if (!isa_dev) {
@@ -165,40 +162,24 @@ static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
 		parent_isa_dev->child = isa_dev;
 
 		isa_dev->bus = parent_isa_dev->bus;
-		isa_dev->prom_node = node;
-		prop_len = prom_getproperty(node, "name",
-					    (char *) isa_dev->prom_name,
-					    sizeof(isa_dev->prom_name));
-		if (prop_len <= 0) {
-			fatal_err("cannot get child isa_dev OBP node name");
-			prom_halt();
-		}
-
-		prop_len = prom_getproperty(node, "compatible",
-					    (char *) isa_dev->compatible,
-					    sizeof(isa_dev->compatible));
+		isa_dev->prom_node = dp;
 
-		/* Not having this is OK. */
-		if (prop_len <= 0)
-			isa_dev->compatible[0] = '\0';
-
-		isa_dev_get_resource(isa_dev, regs, sizeof(regs));
+		regs = isa_dev_get_resource(isa_dev);
 		isa_dev_get_irq(isa_dev, regs);
 
 		report_dev(isa_dev, 1);
 
-		node = prom_getsibling(node);
+		dp = dp->sibling;
 	}
 }
 
 static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 {
-	int node = prom_getchild(isa_br->prom_node);
+	struct device_node *dp = isa_br->prom_node->child;
 
-	while (node != 0) {
-		struct linux_prom_registers regs[PROMREG_MAX];
+	while (dp) {
+		struct linux_prom_registers *regs;
 		struct sparc_isa_device *isa_dev;
-		int prop_len;
 
 		isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
 		if (!isa_dev) {
@@ -222,24 +203,9 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 		}
 
 		isa_dev->bus = isa_br;
-		isa_dev->prom_node = node;
-		prop_len = prom_getproperty(node, "name",
-					    (char *) isa_dev->prom_name,
-					    sizeof(isa_dev->prom_name));
-		if (prop_len <= 0) {
-			fatal_err("cannot get isa_dev OBP node name");
-			prom_halt();
-		}
-
-		prop_len = prom_getproperty(node, "compatible",
-					    (char *) isa_dev->compatible,
-					    sizeof(isa_dev->compatible));
-
-		/* Not having this is OK. */
-		if (prop_len <= 0)
-			isa_dev->compatible[0] = '\0';
+		isa_dev->prom_node = dp;
 
-		isa_dev_get_resource(isa_dev, regs, sizeof(regs));
+		regs = isa_dev_get_resource(isa_dev);
 		isa_dev_get_irq(isa_dev, regs);
 
 		report_dev(isa_dev, 0);
@@ -248,10 +214,40 @@ static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
 
 		printk("]");
 
-		node = prom_getsibling(node);
+		dp = dp->sibling;
 	}
 }
 
+static void __init get_bridge_props(struct sparc_isa_bridge *isa_br)
+{
+	struct device_node *dp = isa_br->prom_node;
+	void *pval;
+	int len;
+
+	pval = of_get_property(dp, "ranges", &len);
+	if (pval) {
+		memcpy(isa_br->isa_ranges, pval, len);
+		isa_br->num_isa_ranges =
+			len / sizeof(struct linux_prom_isa_ranges);
+	} else {
+		isa_br->num_isa_ranges = 0;
+	}
+
+	pval = of_get_property(dp, "interrupt-map", &len);
+	if (pval) {
+		memcpy(isa_br->isa_intmap, pval, len);
+		isa_br->num_isa_intmap =
+			(len / sizeof(struct linux_prom_isa_intmap));
+	} else {
+		isa_br->num_isa_intmap = 0;
+	}
+
+	pval = of_get_property(dp, "interrupt-map-mask", &len);
+	if (pval)
+		memcpy(&isa_br->isa_intmask, pval,
+		       sizeof(isa_br->isa_intmask));
+}
+
 void __init isa_init(void)
 {
 	struct pci_dev *pdev;
@@ -266,7 +262,6 @@ void __init isa_init(void)
 		struct pcidev_cookie *pdev_cookie;
 		struct pci_pbm_info *pbm;
 		struct sparc_isa_bridge *isa_br;
-		int prop_len;
 
 		pdev_cookie = pdev->sysdata;
 		if (!pdev_cookie) {
@@ -291,34 +286,9 @@ void __init isa_init(void)
 		isa_br->parent = pbm;
 		isa_br->self = pdev;
 		isa_br->index = index++;
-		isa_br->prom_node = pdev_cookie->prom_node->node;
-		strncpy(isa_br->prom_name, pdev_cookie->prom_node->name,
-			sizeof(isa_br->prom_name));
-
-		prop_len = prom_getproperty(isa_br->prom_node,
-					    "ranges",
-					    (char *) isa_br->isa_ranges,
-					    sizeof(isa_br->isa_ranges));
-		if (prop_len <= 0)
-			isa_br->num_isa_ranges = 0;
-		else
-			isa_br->num_isa_ranges =
-				(prop_len / sizeof(struct linux_prom_isa_ranges));
-
-		prop_len = prom_getproperty(isa_br->prom_node,
-					    "interrupt-map",
-					    (char *) isa_br->isa_intmap,
-					    sizeof(isa_br->isa_intmap));
-		if (prop_len <= 0)
-			isa_br->num_isa_intmap = 0;
-		else
-			isa_br->num_isa_intmap =
-				(prop_len / sizeof(struct linux_prom_isa_intmap));
-
-		prop_len = prom_getproperty(isa_br->prom_node,
-					    "interrupt-map-mask",
-					    (char *) &(isa_br->isa_intmask),
-					    sizeof(isa_br->isa_intmask));
+		isa_br->prom_node = pdev_cookie->prom_node;
+
+		get_bridge_props(isa_br);
 
 		printk("isa%d:", isa_br->index);
 
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 30bcaf58e3ab..75159a7843f1 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -105,24 +105,24 @@ again:
 	return 0;
 }
 
-static int __init has_button_interrupt(unsigned int irq, int prom_node)
+static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
 {
 	if (irq == PCI_IRQ_NONE)
 		return 0;
-	if (!prom_node_has_property(prom_node, "button"))
+	if (!of_find_property(dp, "button", NULL))
 		return 0;
 
 	return 1;
 }
 
-static int __init power_probe_ebus(struct resource **resp, unsigned int *irq_p, int *prom_node_p)
+static int __init power_probe_ebus(struct resource **resp, unsigned int *irq_p, struct device_node **prom_node_p)
 {
 	struct linux_ebus *ebus;
 	struct linux_ebus_device *edev;
 
 	for_each_ebus(ebus) {
 		for_each_ebusdev(edev, ebus) {
-			if (!strcmp(edev->prom_name, "power")) {
+			if (!strcmp(edev->prom_node->name, "power")) {
 				*resp = &edev->resource[0];
 				*irq_p = edev->irqs[0];
 				*prom_node_p = edev->prom_node;
@@ -133,14 +133,14 @@ static int __init power_probe_ebus(struct resource **resp, unsigned int *irq_p,
 	return -ENODEV;
 }
 
-static int __init power_probe_isa(struct resource **resp, unsigned int *irq_p, int *prom_node_p)
+static int __init power_probe_isa(struct resource **resp, unsigned int *irq_p, struct device_node **prom_node_p)
 {
 	struct sparc_isa_bridge *isa_bus;
 	struct sparc_isa_device *isa_dev;
 
 	for_each_isa(isa_bus) {
 		for_each_isadev(isa_dev, isa_bus) {
-			if (!strcmp(isa_dev->prom_name, "power")) {
+			if (!strcmp(isa_dev->prom_node->name, "power")) {
 				*resp = &isa_dev->resource;
 				*irq_p = isa_dev->irq;
 				*prom_node_p = isa_dev->prom_node;
@@ -155,17 +155,17 @@ void __init power_init(void)
 {
 	struct resource *res = NULL;
 	unsigned int irq;
-	int prom_node;
+	struct device_node *dp;
 	static int invoked;
 
 	if (invoked)
 		return;
 	invoked = 1;
 
-	if (!power_probe_ebus(&res, &irq, &prom_node))
+	if (!power_probe_ebus(&res, &irq, &dp))
 		goto found;
 
-	if (!power_probe_isa(&res, &irq, &prom_node))
+	if (!power_probe_isa(&res, &irq, &dp))
 		goto found;
 
 	return;
@@ -174,7 +174,7 @@ found:
 	power_reg = ioremap(res->start, 0x4);
 	printk("power: Control reg at %p ... ", power_reg);
 	poweroff_method = machine_halt;  /* able to use the standard halt */
-	if (has_button_interrupt(irq, prom_node)) {
+	if (has_button_interrupt(irq, dp)) {
 		if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
 			printk("Failed to start power daemon.\n");
 			return;
diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index fb112c3c0485..7809100034b0 100644
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -63,6 +63,7 @@ struct device_node *of_find_node_by_path(const char *path)
 
 	return np;
 }
+EXPORT_SYMBOL(of_find_node_by_path);
 
 struct device_node *of_find_node_by_phandle(phandle handle)
 {
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index aa5438a4fd50..d072b8632ccd 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -756,24 +756,200 @@ retry:
 	return -EOPNOTSUPP;
 }
 
-void __init clock_probe(void)
+static int __init clock_model_matches(char *model)
+{
+	if (strcmp(model, "mk48t02") &&
+	    strcmp(model, "mk48t08") &&
+	    strcmp(model, "mk48t59") &&
+	    strcmp(model, "m5819") &&
+	    strcmp(model, "m5819p") &&
+	    strcmp(model, "m5823") &&
+	    strcmp(model, "ds1287"))
+		return 0;
+
+	return 1;
+}
+
+static void __init __clock_assign_common(void __iomem *addr, char *model)
+{
+	if (model[5] == '0' && model[6] == '2') {
+		mstk48t02_regs = addr;
+	} else if(model[5] == '0' && model[6] == '8') {
+		mstk48t08_regs = addr;
+		mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02;
+	} else {
+		mstk48t59_regs = addr;
+		mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
+	}
+}
+
+static void __init clock_assign_clk_reg(struct linux_prom_registers *clk_reg,
+					char *model)
+{
+	unsigned long addr;
+
+	addr = ((unsigned long) clk_reg[0].phys_addr |
+		(((unsigned long) clk_reg[0].which_io) << 32UL));
+
+	__clock_assign_common((void __iomem *) addr, model);
+}
+
+static int __init clock_probe_central(void)
 {
 	struct linux_prom_registers clk_reg[2];
-	char model[128];
-	int node, busnd = -1, err;
-	unsigned long flags;
-	struct linux_central *cbus;
+	char model[64];
+	int node;
+
+	if (!central_bus)
+		return 0;
+
+	/* Get Central FHC's prom node.  */
+	node = central_bus->child->prom_node;
+
+	/* Then get the first child device below it.  */
+	node = prom_getchild(node);
+
+	while (node) {
+		prom_getstring(node, "model", model, sizeof(model));
+		if (!clock_model_matches(model))
+			goto next_sibling;
+
+		prom_getproperty(node, "reg", (char *)clk_reg,
+				 sizeof(clk_reg));
+
+		apply_fhc_ranges(central_bus->child, clk_reg, 1);
+		apply_central_ranges(central_bus, clk_reg, 1);
+
+		clock_assign_clk_reg(clk_reg, model);
+		return 1;
+
+	next_sibling:
+		node = prom_getsibling(node);
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_PCI
-	struct linux_ebus *ebus = NULL;
-	struct sparc_isa_bridge *isa_br = NULL;
+static void __init clock_isa_ebus_assign_regs(struct resource *res, char *model)
+{
+	if (!strcmp(model, "ds1287") ||
+	    !strcmp(model, "m5819") ||
+	    !strcmp(model, "m5819p") ||
+	    !strcmp(model, "m5823")) {
+		ds1287_regs = res->start;
+	} else {
+		mstk48t59_regs = (void __iomem *) res->start;
+		mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
+	}
+}
+
+static int __init clock_probe_one_ebus_dev(struct linux_ebus_device *edev)
+{
+	struct device_node *dp = edev->prom_node;
+	char *model;
+
+	model = of_get_property(dp, "model", NULL);
+	if (!clock_model_matches(model))
+		return 0;
+
+	clock_isa_ebus_assign_regs(&edev->resource[0], model);
+
+	return 1;
+}
+
+static int __init clock_probe_ebus(void)
+{
+	struct linux_ebus *ebus;
+
+	for_each_ebus(ebus) {
+		struct linux_ebus_device *edev;
+
+		for_each_ebusdev(edev, ebus) {
+			if (clock_probe_one_ebus_dev(edev))
+				return 1;
+		}
+	}
+
+	return 0;
+}
+
+static int __init clock_probe_one_isa_dev(struct sparc_isa_device *idev)
+{
+	struct device_node *dp = idev->prom_node;
+	char *model;
+
+	model = of_get_property(dp, "model", NULL);
+	if (!clock_model_matches(model))
+		return 0;
+
+	clock_isa_ebus_assign_regs(&idev->resource, model);
+
+	return 1;
+}
+
+static int __init clock_probe_isa(void)
+{
+	struct sparc_isa_bridge *isa_br;
+
+	for_each_isa(isa_br) {
+		struct sparc_isa_device *isa_dev;
+
+		for_each_isadev(isa_dev, isa_br) {
+			if (clock_probe_one_isa_dev(isa_dev))
+				return 1;
+		}
+	}
+
+	return 0;
+}
+#endif /* CONFIG_PCI */
+
+#ifdef CONFIG_SBUS
+static int __init clock_probe_one_sbus_dev(struct sbus_bus *sbus, struct sbus_dev *sdev)
+{
+	struct resource *res;
+	char model[64];
+	void __iomem *addr;
+
+	prom_getstring(sdev->prom_node, "model", model, sizeof(model));
+	if (!clock_model_matches(model))
+		return 0;
+
+	res = &sdev->resource[0];
+	addr = sbus_ioremap(res, 0, 0x800UL, "eeprom");
+
+	__clock_assign_common(addr, model);
+
+	return 1;
+}
+
+static int __init clock_probe_sbus(void)
+{
+	struct sbus_bus *sbus;
+
+	for_each_sbus(sbus) {
+		struct sbus_dev *sdev;
+
+		for_each_sbusdev(sdev, sbus) {
+			if (clock_probe_one_sbus_dev(sbus, sdev))
+				return 1;
+		}
+	}
+
+	return 0;
+}
 #endif
+
+void __init clock_probe(void)
+{
 	static int invoked;
+	unsigned long flags;
 
 	if (invoked)
 		return;
 	invoked = 1;
 
-
 	if (this_is_starfire) {
 		xtime.tv_sec = starfire_get_time();
 		xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
@@ -789,183 +965,27 @@ void __init clock_probe(void)
 		return;
 	}
 
-	local_irq_save(flags);
-
-	cbus = central_bus;
-	if (cbus != NULL)
-		busnd = central_bus->child->prom_node;
-
 	/* Check FHC Central then EBUSs then ISA bridges then SBUSs.
 	 * That way we handle the presence of multiple properly.
 	 *
 	 * As a special case, machines with Central must provide the
 	 * timer chip there.
 	 */
+	if (!clock_probe_central() &&
 #ifdef CONFIG_PCI
-	if (ebus_chain != NULL) {
-		ebus = ebus_chain;
-		if (busnd == -1)
-			busnd = ebus->prom_node;
-	}
-	if (isa_chain != NULL) {
-		isa_br = isa_chain;
-		if (busnd == -1)
-			busnd = isa_br->prom_node;
-	}
-#endif
-	if (sbus_root != NULL && busnd == -1)
-		busnd = sbus_root->prom_node;
-
-	if (busnd == -1) {
-		prom_printf("clock_probe: problem, cannot find bus to search.\n");
-		prom_halt();
-	}
-
-	node = prom_getchild(busnd);
-
-	while (1) {
-		if (!node)
-			model[0] = 0;
-		else
-			prom_getstring(node, "model", model, sizeof(model));
-		if (strcmp(model, "mk48t02") &&
-		    strcmp(model, "mk48t08") &&
-		    strcmp(model, "mk48t59") &&
-		    strcmp(model, "m5819") &&
-		    strcmp(model, "m5819p") &&
-		    strcmp(model, "m5823") &&
-		    strcmp(model, "ds1287")) {
-			if (cbus != NULL) {
-				prom_printf("clock_probe: Central bus lacks timer chip.\n");
-				prom_halt();
-			}
-
-		   	if (node != 0)
-				node = prom_getsibling(node);
-#ifdef CONFIG_PCI
-			while ((node == 0) && ebus != NULL) {
-				ebus = ebus->next;
-				if (ebus != NULL) {
-					busnd = ebus->prom_node;
-					node = prom_getchild(busnd);
-				}
-			}
-			while ((node == 0) && isa_br != NULL) {
-				isa_br = isa_br->next;
-				if (isa_br != NULL) {
-					busnd = isa_br->prom_node;
-					node = prom_getchild(busnd);
-				}
-			}
+	    !clock_probe_ebus() &&
+	    !clock_probe_isa() &&
 #endif
-			if (node == 0) {
-				prom_printf("clock_probe: Cannot find timer chip\n");
-				prom_halt();
-			}
-			continue;
-		}
-
-		err = prom_getproperty(node, "reg", (char *)clk_reg,
-				       sizeof(clk_reg));
-		if(err == -1) {
-			prom_printf("clock_probe: Cannot get Mostek reg property\n");
-			prom_halt();
-		}
-
-		if (cbus != NULL) {
-			apply_fhc_ranges(central_bus->child, clk_reg, 1);
-			apply_central_ranges(central_bus, clk_reg, 1);
-		}
-#ifdef CONFIG_PCI
-		else if (ebus != NULL) {
-			struct linux_ebus_device *edev;
-
-			for_each_ebusdev(edev, ebus)
-				if (edev->prom_node == node)
-					break;
-			if (edev == NULL) {
-				if (isa_chain != NULL)
-					goto try_isa_clock;
-				prom_printf("%s: Mostek not probed by EBUS\n",
-					    __FUNCTION__);
-				prom_halt();
-			}
-
-			if (!strcmp(model, "ds1287") ||
-			    !strcmp(model, "m5819") ||
-			    !strcmp(model, "m5819p") ||
-			    !strcmp(model, "m5823")) {
-				ds1287_regs = edev->resource[0].start;
-			} else {
-				mstk48t59_regs = (void __iomem *)
-					edev->resource[0].start;
-				mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
-			}
-			break;
-		}
-		else if (isa_br != NULL) {
-			struct sparc_isa_device *isadev;
-
-try_isa_clock:
-			for_each_isadev(isadev, isa_br)
-				if (isadev->prom_node == node)
-					break;
-			if (isadev == NULL) {
-				prom_printf("%s: Mostek not probed by ISA\n");
-				prom_halt();
-			}
-			if (!strcmp(model, "ds1287") ||
-			    !strcmp(model, "m5819") ||
-			    !strcmp(model, "m5819p") ||
-			    !strcmp(model, "m5823")) {
-				ds1287_regs = isadev->resource.start;
-			} else {
-				mstk48t59_regs = (void __iomem *)
-					isadev->resource.start;
-				mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
-			}
-			break;
-		}
+#ifdef CONFIG_SBUS
+	    !clock_probe_sbus()
 #endif
-		else {
-			if (sbus_root->num_sbus_ranges) {
-				int nranges = sbus_root->num_sbus_ranges;
-				int rngc;
-
-				for (rngc = 0; rngc < nranges; rngc++)
-					if (clk_reg[0].which_io ==
-					    sbus_root->sbus_ranges[rngc].ot_child_space)
-						break;
-				if (rngc == nranges) {
-					prom_printf("clock_probe: Cannot find ranges for "
-						    "clock regs.\n");
-					prom_halt();
-				}
-				clk_reg[0].which_io =
-					sbus_root->sbus_ranges[rngc].ot_parent_space;
-				clk_reg[0].phys_addr +=
-					sbus_root->sbus_ranges[rngc].ot_parent_base;
-			}
-		}
-
-		if(model[5] == '0' && model[6] == '2') {
-			mstk48t02_regs = (void __iomem *)
-				(((u64)clk_reg[0].phys_addr) |
-				 (((u64)clk_reg[0].which_io)<<32UL));
-		} else if(model[5] == '0' && model[6] == '8') {
-			mstk48t08_regs = (void __iomem *)
-				(((u64)clk_reg[0].phys_addr) |
-				 (((u64)clk_reg[0].which_io)<<32UL));
-			mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02;
-		} else {
-			mstk48t59_regs = (void __iomem *)
-				(((u64)clk_reg[0].phys_addr) |
-				 (((u64)clk_reg[0].which_io)<<32UL));
-			mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
-		}
-		break;
+		) {
+		printk(KERN_WARNING "No clock chip found.\n");
+		return;
 	}
 
+	local_irq_save(flags);
+
 	if (mstk48t02_regs != NULL) {
 		/* Report a low battery voltage condition. */
 		if (has_low_battery())