[PATCH 0/8] sparc: OF name and device_type rework

[PATCH 0/8] sparc: OF name and device_type rework

[Rob Herring]

All other platforms have been converted to only store the local node name
in device_node.full_name except Sparc. Sparc was complicated by having a
path_component_name in addition to full_name and name. By switching
full_name to just the local node name, path_component_name becomes
redundant and can be removed.

The rest of the series converts the sparc code to use printf specifiers
and helper functions to access node name and device_type instead of
directly accessing device_node full_name, name and type pointers.

I've tested this series under qemu.

Rob

Rob Herring (8):
  fs/openpromfs: use full_name instead of path_component_name
  of: Drop full path from Sparc PDT full_name
  sparc: prom: use property "name" directly to construct node names
  sparc: Convert to using %pOF instead of full_name
  sparc: Convert to using %pOFn instead of device_node.name
  sparc: Use of_node_name_eq for node name comparisons
  sparc: Remove unused leon_trans_init
  sparc: Use device_type helpers to access the node type

 arch/sparc/include/asm/leon.h        |  1 -
 arch/sparc/kernel/auxio_64.c         | 11 ++--
 arch/sparc/kernel/central.c          |  2 +-
 arch/sparc/kernel/chmc.c             |  8 +--
 arch/sparc/kernel/irq_64.c           |  2 +-
 arch/sparc/kernel/leon_kernel.c      | 14 ------
 arch/sparc/kernel/of_device_32.c     | 19 ++++---
 arch/sparc/kernel/of_device_64.c     | 56 ++++++++++-----------
 arch/sparc/kernel/of_device_common.c |  4 +-
 arch/sparc/kernel/pci.c              | 44 +++++++---------
 arch/sparc/kernel/pci_sabre.c        |  2 +-
 arch/sparc/kernel/power.c            |  4 +-
 arch/sparc/kernel/process_32.c       |  2 +-
 arch/sparc/kernel/prom_32.c          | 44 ++++++++--------
 arch/sparc/kernel/prom_64.c          | 75 +++++++++++++++-------------
 arch/sparc/kernel/prom_irqtrans.c    | 20 ++++----
 arch/sparc/kernel/reboot.c           |  3 +-
 arch/sparc/kernel/sbus.c             |  4 +-
 arch/sparc/kernel/sun4d_irq.c        | 14 +++---
 arch/sparc/kernel/time_64.c          | 16 +++---
 arch/sparc/kernel/vio.c              |  9 ++--
 drivers/of/pdt.c                     | 26 ++--------
 fs/openpromfs/inode.c                |  9 ++--
 include/linux/of.h                   |  1 -
 24 files changed, 174 insertions(+), 216 deletions(-)

--
2.19.1

[PATCH 1/8] fs/openpromfs: use full_name instead of path_component_name

[Rob Herring]

In preparation to remove struct device_node.path_component_name, use
full_name instead. kbasename is used so full_name can be used whether it
is the full path or just the node's name and unit-address.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 fs/openpromfs/inode.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index 607092f367ad..3d8e9bcfe239 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -199,10 +199,11 @@ static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry
 
 	child = dp->child;
 	while (child) {
-		int n = strlen(child->path_component_name);
+		const char *node_name = kbasename(child->full_name);
+		int n = strlen(node_name);
 
 		if (len == n &&
-		    !strncmp(child->path_component_name, name, len)) {
+		    !strncmp(node_name, name, len)) {
 			ent_type = op_inode_node;
 			ent_data.node = child;
 			ino = child->unique_id;
@@ -293,8 +294,8 @@ static int openpromfs_readdir(struct file *file, struct dir_context *ctx)
 	}
 	while (child) {
 		if (!dir_emit(ctx,
-			    child->path_component_name,
-			    strlen(child->path_component_name),
+			    kbasename(child->full_name),
+			    strlen(kbasename(child->full_name)),
 			    child->unique_id, DT_DIR))
 			goto out;
 
-- 
2.19.1

[PATCH 2/8] of: Drop full path from Sparc PDT full_name

[Rob Herring]

Now that there are no more users of path_component_name outside of
the PDT code and users of device_node.full_name are converted to use
"%pOF" printf specifier, we can align Sparc with other arches and store
just the base node name and unit address in full_name. This makes
path_component_name redundant, so it can be removed.

As full_name is used by printf specifiers, set it as early as possible.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/of/pdt.c   | 26 +++-----------------------
 include/linux/of.h |  1 -
 2 files changed, 3 insertions(+), 24 deletions(-)

diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c
index 013e65de074a..40321b6b82e2 100644
--- a/drivers/of/pdt.c
+++ b/drivers/of/pdt.c
@@ -32,24 +32,7 @@ unsigned int of_pdt_unique_id __initdata;
 
 static char * __init of_pdt_build_full_name(struct device_node *dp)
 {
-	int len, ourlen, plen;
-	char *n;
-
-	dp->path_component_name = build_path_component(dp);
-
-	plen = strlen(dp->parent->full_name);
-	ourlen = strlen(dp->path_component_name);
-	len = ourlen + plen + 2;
-
-	n = prom_early_alloc(len);
-	strcpy(n, dp->parent->full_name);
-	if (!of_node_is_root(dp->parent)) {
-		strcpy(n + plen, "/");
-		plen++;
-	}
-	strcpy(n + plen, dp->path_component_name);
-
-	return n;
+	return build_path_component(dp);
 }
 
 #else /* CONFIG_SPARC */
@@ -181,6 +164,8 @@ static struct device_node * __init of_pdt_create_node(phandle node,
 
 	dp->properties = of_pdt_build_prop_list(node);
 
+	dp->full_name = of_pdt_build_full_name(dp);
+
 	irq_trans_init(dp);
 
 	return dp;
@@ -204,8 +189,6 @@ static struct device_node * __init of_pdt_build_tree(struct device_node *parent,
 			ret = dp;
 		prev_sibling = dp;
 
-		dp->full_name = of_pdt_build_full_name(dp);
-
 		dp->child = of_pdt_build_tree(dp, of_pdt_prom_ops->getchild(node));
 
 		if (of_pdt_build_more)
@@ -228,9 +211,6 @@ void __init of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops)
 	of_pdt_prom_ops = ops;
 
 	of_root = of_pdt_create_node(root_node, NULL);
-#if defined(CONFIG_SPARC)
-	of_root->path_component_name = "";
-#endif
 	of_root->full_name = "/";
 
 	of_root->child = of_pdt_build_tree(of_root,
diff --git a/include/linux/of.h b/include/linux/of.h
index a5aee3c438ad..0fe5bef81a7e 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -66,7 +66,6 @@ struct device_node {
 	unsigned long _flags;
 	void	*data;
 #if defined(CONFIG_SPARC)
-	const char *path_component_name;
 	unsigned int unique_id;
 	struct of_irq_controller *irq_trans;
 #endif
-- 
2.19.1

Re: [PATCH 2/8] of: Drop full path from Sparc PDT full_name

[David Miller]

From: Rob Herring <robh@kernel.org>
Date: Wed,  7 Nov 2018 16:31:45 -0600

> @@ -32,24 +32,7 @@ unsigned int of_pdt_unique_id __initdata;
>  
>  static char * __init of_pdt_build_full_name(struct device_node *dp)
>  {
> -	int len, ourlen, plen;
> -	char *n;
> -
> -	dp->path_component_name = build_path_component(dp);
> -
> -	plen = strlen(dp->parent->full_name);
> -	ourlen = strlen(dp->path_component_name);
> -	len = ourlen + plen + 2;
> -
> -	n = prom_early_alloc(len);
> -	strcpy(n, dp->parent->full_name);
> -	if (!of_node_is_root(dp->parent)) {
> -		strcpy(n + plen, "/");
> -		plen++;
> -	}
> -	strcpy(n + plen, dp->path_component_name);
> -
> -	return n;
> +	return build_path_component(dp);
>  }
>  
>  #else /* CONFIG_SPARC */

Hmmm, shouldn't this be doing what the non-SPARC version of
of_pdt_build_full_name() does which is to return the component string
appended to the parent's full_name?

You're just returning the component string here.

Re: [PATCH 2/8] of: Drop full path from Sparc PDT full_name

[Rob Herring]

On Thu, Nov 8, 2018 at 9:11 PM David Miller <davem@davemloft.net> wrote:
>
> From: Rob Herring <robh@kernel.org>
> Date: Wed,  7 Nov 2018 16:31:45 -0600
>
> > @@ -32,24 +32,7 @@ unsigned int of_pdt_unique_id __initdata;
> >
> >  static char * __init of_pdt_build_full_name(struct device_node *dp)
> >  {
> > -     int len, ourlen, plen;
> > -     char *n;
> > -
> > -     dp->path_component_name = build_path_component(dp);
> > -
> > -     plen = strlen(dp->parent->full_name);
> > -     ourlen = strlen(dp->path_component_name);
> > -     len = ourlen + plen + 2;
> > -
> > -     n = prom_early_alloc(len);
> > -     strcpy(n, dp->parent->full_name);
> > -     if (!of_node_is_root(dp->parent)) {
> > -             strcpy(n + plen, "/");
> > -             plen++;
> > -     }
> > -     strcpy(n + plen, dp->path_component_name);
> > -
> > -     return n;
> > +     return build_path_component(dp);
> >  }
> >
> >  #else /* CONFIG_SPARC */
>
> Hmmm, shouldn't this be doing what the non-SPARC version of
> of_pdt_build_full_name() does which is to return the component string
> appended to the parent's full_name?
>
> You're just returning the component string here.

That is the intent. With this change we stop storing the full path for
every node. Everywhere that needs the full path, generates it with the
%pOF printf specifier. Other than users in arch/sparc converted in
this series all the users of full_name have been converted already or
use kbasename(full_name) so they work either way. BTW, I've found a
couple more, so I'll be sending you a v2.

And of_pdt_build_full_name for !SPARC does need to be converted too,
but I'll do that separately.

Rob

Re: [PATCH 2/8] of: Drop full path from Sparc PDT full_name

[David Miller]

From: Rob Herring <robh@kernel.org>
Date: Fri, 9 Nov 2018 14:30:01 -0600

> That is the intent. With this change we stop storing the full path for
> every node. Everywhere that needs the full path, generates it with the
> %pOF printf specifier. Other than users in arch/sparc converted in
> this series all the users of full_name have been converted already or
> use kbasename(full_name) so they work either way. BTW, I've found a
> couple more, so I'll be sending you a v2.
> 
> And of_pdt_build_full_name for !SPARC does need to be converted too,
> but I'll do that separately.

I would think that, for correctness, you'd need to adjust both functions
at the same time, no?

[PATCH 3/8] sparc: prom: use property "name" directly to construct node names

[Rob Herring]

In preparation to remove direct accesses to the device_node.name
pointer, retrieve the node name from the "name" property instead.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/kernel/prom_32.c | 20 ++++++++++------
 arch/sparc/kernel/prom_64.c | 47 +++++++++++++++++++++++--------------
 2 files changed, 42 insertions(+), 25 deletions(-)

diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index d41e2a749c5d..30e33b461970 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -60,6 +60,7 @@ void * __init prom_early_alloc(unsigned long size)
  */
 static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_registers *regs;
 	struct property *rprop;
 
@@ -69,13 +70,14 @@ static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
 
 	regs = rprop->value;
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		regs->which_io, regs->phys_addr);
 }
 
 /* "name@slot,offset"  */
 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_registers *regs;
 	struct property *prop;
 
@@ -85,7 +87,7 @@ static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 
 	regs = prop->value;
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		regs->which_io,
 		regs->phys_addr);
 }
@@ -93,6 +95,7 @@ static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@devnum[,func]" */
 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_pci_registers *regs;
 	struct property *prop;
 	unsigned int devfn;
@@ -105,12 +108,12 @@ static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 	devfn = (regs->phys_hi >> 8) & 0xff;
 	if (devfn & 0x07) {
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name,
+			name,
 			devfn >> 3,
 			devfn & 0x07);
 	} else {
 		sprintf(tmp_buf, "%s@%x",
-			dp->name,
+			name,
 			devfn >> 3);
 	}
 }
@@ -118,6 +121,7 @@ static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@addrhi,addrlo" */
 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_registers *regs;
 	struct property *prop;
 
@@ -128,13 +132,14 @@ static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
 	regs = prop->value;
 
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		regs->which_io, regs->phys_addr);
 }
 
 /* "name:vendor:device@irq,addrlo" */
 static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct amba_prom_registers *regs;
 	unsigned int *intr, *device, *vendor, reg0;
 	struct property *prop;
@@ -168,7 +173,7 @@ static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
 	device = prop->value;
 
 	sprintf(tmp_buf, "%s:%d:%d@%x,%x",
-		dp->name, *vendor, *device,
+		name, *vendor, *device,
 		*intr, reg0);
 }
 
@@ -196,12 +201,13 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 
 char * __init build_path_component(struct device_node *dp)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	char tmp_buf[64], *n;
 
 	tmp_buf[0] = '\0';
 	__build_path_component(dp, tmp_buf);
 	if (tmp_buf[0] == '\0')
-		strcpy(tmp_buf, dp->name);
+		strcpy(tmp_buf, name);
 
 	n = prom_early_alloc(strlen(tmp_buf) + 1);
 	strcpy(n, tmp_buf);
diff --git a/arch/sparc/kernel/prom_64.c b/arch/sparc/kernel/prom_64.c
index c37955d127fe..1667df573f6f 100644
--- a/arch/sparc/kernel/prom_64.c
+++ b/arch/sparc/kernel/prom_64.c
@@ -72,6 +72,7 @@ void * __init prom_early_alloc(unsigned long size)
  */
 static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom64_registers *regs;
 	struct property *rprop;
 	u32 high_bits, low_bits, type;
@@ -83,7 +84,7 @@ static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
 	regs = rprop->value;
 	if (!of_node_is_root(dp->parent)) {
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name,
+			name,
 			(unsigned int) (regs->phys_addr >> 32UL),
 			(unsigned int) (regs->phys_addr & 0xffffffffUL));
 		return;
@@ -98,21 +99,22 @@ static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
 
 		if (low_bits)
 			sprintf(tmp_buf, "%s@%s%x,%x",
-				dp->name, prefix,
+				name, prefix,
 				high_bits, low_bits);
 		else
 			sprintf(tmp_buf, "%s@%s%x",
-				dp->name,
+				name,
 				prefix,
 				high_bits);
 	} else if (type == 12) {
 		sprintf(tmp_buf, "%s@%x",
-			dp->name, high_bits);
+			name, high_bits);
 	}
 }
 
 static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom64_registers *regs;
 	struct property *prop;
 
@@ -123,7 +125,7 @@ static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
 	regs = prop->value;
 	if (!of_node_is_root(dp->parent)) {
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name,
+			name,
 			(unsigned int) (regs->phys_addr >> 32UL),
 			(unsigned int) (regs->phys_addr & 0xffffffffUL));
 		return;
@@ -139,7 +141,7 @@ static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
 			mask = 0x7fffff;
 
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name,
+			name,
 			*(u32 *)prop->value,
 			(unsigned int) (regs->phys_addr & mask));
 	}
@@ -148,6 +150,7 @@ static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@slot,offset"  */
 static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_registers *regs;
 	struct property *prop;
 
@@ -157,7 +160,7 @@ static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 
 	regs = prop->value;
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		regs->which_io,
 		regs->phys_addr);
 }
@@ -165,6 +168,7 @@ static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@devnum[,func]" */
 static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom_pci_registers *regs;
 	struct property *prop;
 	unsigned int devfn;
@@ -177,12 +181,12 @@ static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 	devfn = (regs->phys_hi >> 8) & 0xff;
 	if (devfn & 0x07) {
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name,
+			name,
 			devfn >> 3,
 			devfn & 0x07);
 	} else {
 		sprintf(tmp_buf, "%s@%x",
-			dp->name,
+			name,
 			devfn >> 3);
 	}
 }
@@ -190,6 +194,7 @@ static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@UPA_PORTID,offset" */
 static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom64_registers *regs;
 	struct property *prop;
 
@@ -204,7 +209,7 @@ static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
 		return;
 
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		*(u32 *) prop->value,
 		(unsigned int) (regs->phys_addr & 0xffffffffUL));
 }
@@ -212,6 +217,7 @@ static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@reg" */
 static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct property *prop;
 	u32 *regs;
 
@@ -221,12 +227,13 @@ static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
 
 	regs = prop->value;
 
-	sprintf(tmp_buf, "%s@%x", dp->name, *regs);
+	sprintf(tmp_buf, "%s@%x", name, *regs);
 }
 
 /* "name@addrhi,addrlo" */
 static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct linux_prom64_registers *regs;
 	struct property *prop;
 
@@ -237,7 +244,7 @@ static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
 	regs = prop->value;
 
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name,
+		name,
 		(unsigned int) (regs->phys_addr >> 32UL),
 		(unsigned int) (regs->phys_addr & 0xffffffffUL));
 }
@@ -245,6 +252,7 @@ static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
 /* "name@bus,addr" */
 static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct property *prop;
 	u32 *regs;
 
@@ -258,12 +266,13 @@ static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
 	 * property of the i2c bus node etc. etc.
 	 */
 	sprintf(tmp_buf, "%s@%x,%x",
-		dp->name, regs[0], regs[1]);
+		name, regs[0], regs[1]);
 }
 
 /* "name@reg0[,reg1]" */
 static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct property *prop;
 	u32 *regs;
 
@@ -275,16 +284,17 @@ static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
 
 	if (prop->length == sizeof(u32) || regs[1] == 1) {
 		sprintf(tmp_buf, "%s@%x",
-			dp->name, regs[0]);
+			name, regs[0]);
 	} else {
 		sprintf(tmp_buf, "%s@%x,%x",
-			dp->name, regs[0], regs[1]);
+			name, regs[0], regs[1]);
 	}
 }
 
 /* "name@reg0reg1[,reg2reg3]" */
 static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	struct property *prop;
 	u32 *regs;
 
@@ -296,10 +306,10 @@ static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf
 
 	if (regs[2] || regs[3]) {
 		sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
-			dp->name, regs[0], regs[1], regs[2], regs[3]);
+			name, regs[0], regs[1], regs[2], regs[3]);
 	} else {
 		sprintf(tmp_buf, "%s@%08x%08x",
-			dp->name, regs[0], regs[1]);
+			name, regs[0], regs[1]);
 	}
 }
 
@@ -356,12 +366,13 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 
 char * __init build_path_component(struct device_node *dp)
 {
+	const char *name = of_get_property(dp, "name", NULL);
 	char tmp_buf[64], *n;
 
 	tmp_buf[0] = '\0';
 	__build_path_component(dp, tmp_buf);
 	if (tmp_buf[0] == '\0')
-		strcpy(tmp_buf, dp->name);
+		strcpy(tmp_buf, name);
 
 	n = prom_early_alloc(strlen(tmp_buf) + 1);
 	strcpy(n, tmp_buf);
-- 
2.19.1

Re: [PATCH 3/8] sparc: prom: use property "name" directly to construct node names

[David Miller]

From: Rob Herring <robh@kernel.org>
Date: Wed,  7 Nov 2018 16:31:46 -0600

> In preparation to remove direct accesses to the device_node.name
> pointer, retrieve the node name from the "name" property instead.
> 
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: sparclinux@vger.kernel.org
> Signed-off-by: Rob Herring <robh@kernel.org>

On some 32-bit sparcs, the OF runs in non-cached memory.

Sucking in the OF device tree take a signficant amount of the
boot time on such systems.

And these changes are going to make it even slower.

Please just put a wrapper around dp->name or whatever and use that,
instead of making more get property OF calls which can be very
expensive.

Re: [PATCH 3/8] sparc: prom: use property "name" directly to construct node names

[Rob Herring]

On Thu, Nov 8, 2018 at 9:13 PM David Miller <davem@davemloft.net> wrote:
>
> From: Rob Herring <robh@kernel.org>
> Date: Wed,  7 Nov 2018 16:31:46 -0600
>
> > In preparation to remove direct accesses to the device_node.name
> > pointer, retrieve the node name from the "name" property instead.
> >
> > Cc: "David S. Miller" <davem@davemloft.net>
> > Cc: sparclinux@vger.kernel.org
> > Signed-off-by: Rob Herring <robh@kernel.org>
>
> On some 32-bit sparcs, the OF runs in non-cached memory.
>
> Sucking in the OF device tree take a signficant amount of the
> boot time on such systems.
>
> And these changes are going to make it even slower.
>
> Please just put a wrapper around dp->name or whatever and use that,
> instead of making more get property OF calls which can be very
> expensive.

It's not making calls into OF. It is retrieving the property from the
kernel's copy of the DT (allocated by memblock). So the only
difference is we have to walk the struct property list to find "name".
That's perhaps offset by the fact that we'll be doing one less
property retrieval from OF when this is all done. Right now, we
retrieve "name" from OF twice per node.

Rob

Re: [PATCH 3/8] sparc: prom: use property "name" directly to construct node names

[David Miller]

From: Rob Herring <robh@kernel.org>
Date: Fri, 9 Nov 2018 07:02:46 -0600

> On Thu, Nov 8, 2018 at 9:13 PM David Miller <davem@davemloft.net> wrote:
>>
>> From: Rob Herring <robh@kernel.org>
>> Date: Wed,  7 Nov 2018 16:31:46 -0600
>>
>> > In preparation to remove direct accesses to the device_node.name
>> > pointer, retrieve the node name from the "name" property instead.
>> >
>> > Cc: "David S. Miller" <davem@davemloft.net>
>> > Cc: sparclinux@vger.kernel.org
>> > Signed-off-by: Rob Herring <robh@kernel.org>
>>
>> On some 32-bit sparcs, the OF runs in non-cached memory.
>>
>> Sucking in the OF device tree take a signficant amount of the
>> boot time on such systems.
>>
>> And these changes are going to make it even slower.
>>
>> Please just put a wrapper around dp->name or whatever and use that,
>> instead of making more get property OF calls which can be very
>> expensive.
> 
> It's not making calls into OF. It is retrieving the property from the
> kernel's copy of the DT (allocated by memblock). So the only
> difference is we have to walk the struct property list to find "name".
> That's perhaps offset by the fact that we'll be doing one less
> property retrieval from OF when this is all done. Right now, we
> retrieve "name" from OF twice per node.

Ok, now I understand, thanks.

[PATCH 4/8] sparc: Convert to using %pOF instead of full_name

[Rob Herring]

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/kernel/auxio_64.c     |  3 +--
 arch/sparc/kernel/chmc.c         |  8 +++----
 arch/sparc/kernel/of_device_32.c |  7 +++----
 arch/sparc/kernel/of_device_64.c | 36 +++++++++++++++-----------------
 arch/sparc/kernel/pci.c          | 31 +++++++++++++--------------
 arch/sparc/kernel/prom_32.c      |  4 ++--
 arch/sparc/kernel/sbus.c         |  4 ++--
 arch/sparc/kernel/sun4d_irq.c    |  8 +++----
 arch/sparc/kernel/time_64.c      | 12 +++++------
 arch/sparc/kernel/vio.c          |  2 +-
 10 files changed, 55 insertions(+), 60 deletions(-)

diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
index 4e8f56c3793c..6145658d915a 100644
--- a/arch/sparc/kernel/auxio_64.c
+++ b/arch/sparc/kernel/auxio_64.c
@@ -123,8 +123,7 @@ static int auxio_probe(struct platform_device *dev)
 	if (!auxio_register)
 		return -ENODEV;
 
-	printk(KERN_INFO "AUXIO: Found device at %s\n",
-	       dp->full_name);
+	printk(KERN_INFO "AUXIO: Found device at %pOF\n", dp);
 
 	if (auxio_devtype == AUXIO_TYPE_EBUS)
 		auxio_set_led(AUXIO_LED_ON);
diff --git a/arch/sparc/kernel/chmc.c b/arch/sparc/kernel/chmc.c
index 0de4bcb8261f..61fe1b951ba3 100644
--- a/arch/sparc/kernel/chmc.c
+++ b/arch/sparc/kernel/chmc.c
@@ -464,8 +464,8 @@ static int jbusmc_probe(struct platform_device *op)
 
 	mc_list_add(&p->list);
 
-	printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %s\n",
-	       op->dev.of_node->full_name);
+	printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %pOF\n",
+	       op->dev.of_node);
 
 	dev_set_drvdata(&op->dev, p);
 
@@ -747,8 +747,8 @@ static int chmc_probe(struct platform_device *op)
 
 	mc_list_add(&p->list);
 
-	printk(KERN_INFO PFX "UltraSPARC-III memory controller at %s [%s]\n",
-	       dp->full_name,
+	printk(KERN_INFO PFX "UltraSPARC-III memory controller at %pOF [%s]\n",
+	       dp,
 	       (p->layout_size ? "ACTIVE" : "INACTIVE"));
 
 	dev_set_drvdata(&op->dev, p);
diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index e4abe9b8f97a..ab133e2753ab 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -324,8 +324,8 @@ static void __init build_device_resources(struct platform_device *op,
 		memset(r, 0, sizeof(*r));
 
 		if (of_resource_verbose)
-			printk("%s reg[%d] -> %llx\n",
-			       op->dev.of_node->full_name, index,
+			printk("%pOF reg[%d] -> %llx\n",
+			       op->dev.of_node, index,
 			       result);
 
 		if (result != OF_BAD_ADDR) {
@@ -386,8 +386,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
 	op->dev.dma_mask = &op->dev.coherent_dma_mask;
 
 	if (of_device_register(op)) {
-		printk("%s: Could not register of device.\n",
-		       dp->full_name);
+		printk("%pOF: Could not register of device.\n", dp);
 		kfree(op);
 		op = NULL;
 	}
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 6df6086968c6..2353cb7bc40f 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -341,9 +341,9 @@ static void __init build_device_resources(struct platform_device *op,
 
 	/* Prevent overrunning the op->resources[] array.  */
 	if (num_reg > PROMREG_MAX) {
-		printk(KERN_WARNING "%s: Too many regs (%d), "
+		printk(KERN_WARNING "%pOF: Too many regs (%d), "
 		       "limiting to %d.\n",
-		       op->dev.of_node->full_name, num_reg, PROMREG_MAX);
+		       op->dev.of_node, num_reg, PROMREG_MAX);
 		num_reg = PROMREG_MAX;
 	}
 
@@ -401,8 +401,8 @@ static void __init build_device_resources(struct platform_device *op,
 		memset(r, 0, sizeof(*r));
 
 		if (of_resource_verbose)
-			printk("%s reg[%d] -> %llx\n",
-			       op->dev.of_node->full_name, index,
+			printk("%pOF reg[%d] -> %llx\n",
+			       op->dev.of_node, index,
 			       result);
 
 		if (result != OF_BAD_ADDR) {
@@ -548,8 +548,8 @@ static unsigned int __init build_one_device_irq(struct platform_device *op,
 					       dp->irq_trans->data);
 
 		if (of_irq_verbose)
-			printk("%s: direct translate %x --> %x\n",
-			       dp->full_name, orig_irq, irq);
+			printk("%pOF: direct translate %x --> %x\n",
+			       dp, orig_irq, irq);
 
 		goto out;
 	}
@@ -579,10 +579,9 @@ static unsigned int __init build_one_device_irq(struct platform_device *op,
 						   &irq);
 
 			if (of_irq_verbose)
-				printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
-				       op->dev.of_node->full_name,
-				       pp->full_name, this_orig_irq,
-				       of_node_full_name(iret), irq);
+				printk("%pOF: Apply [%pOF:%x] imap --> [%pOF:%x]\n",
+				       op->dev.of_node,
+				       pp, this_orig_irq, iret, irq);
 
 			if (!iret)
 				break;
@@ -597,10 +596,10 @@ static unsigned int __init build_one_device_irq(struct platform_device *op,
 
 				irq = pci_irq_swizzle(dp, pp, irq);
 				if (of_irq_verbose)
-					printk("%s: PCI swizzle [%s] "
+					printk("%pOF: PCI swizzle [%pOF] "
 					       "%x --> %x\n",
-					       op->dev.of_node->full_name,
-					       pp->full_name, this_orig_irq,
+					       op->dev.of_node,
+					       pp, this_orig_irq,
 					       irq);
 
 			}
@@ -619,8 +618,8 @@ static unsigned int __init build_one_device_irq(struct platform_device *op,
 	irq = ip->irq_trans->irq_build(op->dev.of_node, irq,
 				       ip->irq_trans->data);
 	if (of_irq_verbose)
-		printk("%s: Apply IRQ trans [%s] %x --> %x\n",
-		      op->dev.of_node->full_name, ip->full_name, orig_irq, irq);
+		printk("%pOF: Apply IRQ trans [%pOF] %x --> %x\n",
+		      op->dev.of_node, ip, orig_irq, irq);
 
 out:
 	nid = of_node_to_nid(dp);
@@ -656,9 +655,9 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
 
 		/* Prevent overrunning the op->irqs[] array.  */
 		if (op->archdata.num_irqs > PROMINTR_MAX) {
-			printk(KERN_WARNING "%s: Too many irqs (%d), "
+			printk(KERN_WARNING "%pOF: Too many irqs (%d), "
 			       "limiting to %d.\n",
-			       dp->full_name, op->archdata.num_irqs, PROMINTR_MAX);
+			       dp, op->archdata.num_irqs, PROMINTR_MAX);
 			op->archdata.num_irqs = PROMINTR_MAX;
 		}
 		memcpy(op->archdata.irqs, irq, op->archdata.num_irqs * 4);
@@ -680,8 +679,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
 	op->dev.dma_mask = &op->dev.coherent_dma_mask;
 
 	if (of_device_register(op)) {
-		printk("%s: Could not register of device.\n",
-		       dp->full_name);
+		printk("%pOF: Could not register of device.\n", dp);
 		kfree(op);
 		op = NULL;
 	}
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 17ea16a1337c..45ba2757a1b9 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -431,13 +431,13 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
 	u64 size;
 
 	if (ofpci_verbose)
-		pci_info(dev, "of_scan_pci_bridge(%s)\n", node->full_name);
+		pci_info(dev, "of_scan_pci_bridge(%pOF)\n", node);
 
 	/* parse bus-range property */
 	busrange = of_get_property(node, "bus-range", &len);
 	if (busrange == NULL || len != 8) {
-		pci_info(dev, "Can't get bus-range for PCI-PCI bridge %s\n",
-		       node->full_name);
+		pci_info(dev, "Can't get bus-range for PCI-PCI bridge %pOF\n",
+		       node);
 		return;
 	}
 
@@ -455,8 +455,8 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
 
 	bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
 	if (!bus) {
-		pci_err(dev, "Failed to create pci bus for %s\n",
-			node->full_name);
+		pci_err(dev, "Failed to create pci bus for %pOF\n",
+			node);
 		return;
 	}
 
@@ -512,13 +512,13 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
 			res = bus->resource[0];
 			if (res->flags) {
 				pci_err(dev, "ignoring extra I/O range"
-					" for bridge %s\n", node->full_name);
+					" for bridge %pOF\n", node);
 				continue;
 			}
 		} else {
 			if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
 				pci_err(dev, "too many memory ranges"
-					" for bridge %s\n", node->full_name);
+					" for bridge %pOF\n", node);
 				continue;
 			}
 			res = bus->resource[i];
@@ -554,14 +554,14 @@ static void pci_of_scan_bus(struct pci_pbm_info *pbm,
 	struct pci_dev *dev;
 
 	if (ofpci_verbose)
-		pci_info(bus, "scan_bus[%s] bus no %d\n",
-			 node->full_name, bus->number);
+		pci_info(bus, "scan_bus[%pOF] bus no %d\n",
+			 node, bus->number);
 
 	child = NULL;
 	prev_devfn = -1;
 	while ((child = of_get_next_child(node, child)) != NULL) {
 		if (ofpci_verbose)
-			pci_info(bus, "  * %s\n", child->full_name);
+			pci_info(bus, "  * %pOF\n", child);
 		reg = of_get_property(child, "reg", &reglen);
 		if (reg == NULL || reglen < 20)
 			continue;
@@ -598,7 +598,7 @@ show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char *
 	pdev = to_pci_dev(dev);
 	dp = pdev->dev.of_node;
 
-	return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
+	return snprintf (buf, PAGE_SIZE, "%pOF\n", dp);
 }
 
 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
@@ -698,7 +698,7 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 	struct device_node *node = pbm->op->dev.of_node;
 	struct pci_bus *bus;
 
-	printk("PCI: Scanning PBM %s\n", node->full_name);
+	printk("PCI: Scanning PBM %pOF\n", node);
 
 	pci_add_resource_offset(&resources, &pbm->io_space,
 				pbm->io_offset);
@@ -714,8 +714,7 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 	bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
 				  pbm, &resources);
 	if (!bus) {
-		printk(KERN_ERR "Failed to create bus for %s\n",
-		       node->full_name);
+		printk(KERN_ERR "Failed to create bus for %pOF\n", node);
 		pci_free_resource_list(&resources);
 		return NULL;
 	}
@@ -1111,8 +1110,8 @@ static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
 	sp = prop->names;
 
 	if (ofpci_verbose)
-		pci_info(bus, "Making slots for [%s] mask[0x%02x]\n",
-			 node->full_name, mask);
+		pci_info(bus, "Making slots for [%pOF] mask[0x%02x]\n",
+			 node, mask);
 
 	i = 0;
 	while (mask) {
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index 30e33b461970..f2835cddf362 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -261,7 +261,7 @@ void __init of_console_init(void)
 		}
 		of_console_device = dp;
 
-		strcpy(of_console_path, dp->full_name);
+		sprintf(of_console_path, "%pOF", dp);
 		if (!strcmp(type, "serial")) {
 			strcat(of_console_path,
 			       (skip ? ":b" : ":a"));
@@ -301,7 +301,7 @@ void __init of_console_init(void)
 		of_console_device = dp;
 
 		if (prom_vers == PROM_V2) {
-			strcpy(of_console_path, dp->full_name);
+			sprintf(of_console_path, "%pOF", dp);
 			switch (*romvec->pv_stdout) {
 			case PROMDEV_TTYA:
 				strcat(of_console_path, ":a");
diff --git a/arch/sparc/kernel/sbus.c b/arch/sparc/kernel/sbus.c
index c133dfc37c5c..41c5deb581b8 100644
--- a/arch/sparc/kernel/sbus.c
+++ b/arch/sparc/kernel/sbus.c
@@ -67,8 +67,8 @@ void sbus_set_sbus64(struct device *dev, int bursts)
 
 	regs = of_get_property(op->dev.of_node, "reg", NULL);
 	if (!regs) {
-		printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n",
-		       op->dev.of_node->full_name);
+		printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %pOF\n",
+		       op->dev.of_node);
 		return;
 	}
 	slot = regs->which_io;
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index d869d409fce6..6d266d7dd2b6 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -361,15 +361,15 @@ static unsigned int sun4d_build_device_irq(struct platform_device *op,
 	 * lacks a "board#" property, something is very wrong.
 	 */
 	if (!bus->parent || strcmp(bus->parent->name, bus_connection)) {
-		printk(KERN_ERR "%s: Error, parent is not %s.\n",
-			bus->full_name, bus_connection);
+		printk(KERN_ERR "%pOF: Error, parent is not %s.\n",
+			bus, bus_connection);
 		goto err_out;
 	}
 	board_parent = bus->parent;
 	board = of_getintprop_default(board_parent, "board#", -1);
 	if (board == -1) {
-		printk(KERN_ERR "%s: Error, lacks board# property.\n",
-			board_parent->full_name);
+		printk(KERN_ERR "%pOF: Error, lacks board# property.\n",
+			board_parent);
 		goto err_out;
 	}
 
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index 5f356dc8e178..68a80f9baea7 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -445,8 +445,8 @@ static int rtc_probe(struct platform_device *op)
 {
 	struct resource *r;
 
-	printk(KERN_INFO "%s: RTC regs at 0x%llx\n",
-	       op->dev.of_node->full_name, op->resource[0].start);
+	printk(KERN_INFO "%pOF: RTC regs at 0x%llx\n",
+	       op->dev.of_node, op->resource[0].start);
 
 	/* The CMOS RTC driver only accepts IORESOURCE_IO, so cons
 	 * up a fake resource so that the probe works for all cases.
@@ -501,8 +501,8 @@ static struct platform_device rtc_bq4802_device = {
 static int bq4802_probe(struct platform_device *op)
 {
 
-	printk(KERN_INFO "%s: BQ4802 regs at 0x%llx\n",
-	       op->dev.of_node->full_name, op->resource[0].start);
+	printk(KERN_INFO "%pOF: BQ4802 regs at 0x%llx\n",
+	       op->dev.of_node, op->resource[0].start);
 
 	rtc_bq4802_device.resource = &op->resource[0];
 	return platform_device_register(&rtc_bq4802_device);
@@ -565,8 +565,8 @@ static int mostek_probe(struct platform_device *op)
 	    strcmp(dp->parent->parent->name, "central") != 0)
 		return -ENODEV;
 
-	printk(KERN_INFO "%s: Mostek regs at 0x%llx\n",
-	       dp->full_name, op->resource[0].start);
+	printk(KERN_INFO "%pOF: Mostek regs at 0x%llx\n",
+	       dp, op->resource[0].start);
 
 	m48t59_rtc.resource = &op->resource[0];
 	return platform_device_register(&m48t59_rtc);
diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c
index 32bae68e34c1..0b578d03797b 100644
--- a/arch/sparc/kernel/vio.c
+++ b/arch/sparc/kernel/vio.c
@@ -193,7 +193,7 @@ show_pciobppath_attr(struct device *dev, struct device_attribute *attr,
 	vdev = to_vio_dev(dev);
 	dp = vdev->dp;
 
-	return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
+	return snprintf (buf, PAGE_SIZE, "%pOF\n", dp);
 }
 
 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH,
-- 
2.19.1

[PATCH 5/8] sparc: Convert to using %pOFn instead of device_node.name

[Rob Herring]

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

This was originally applied for 4.19, but reverted. The problematic
changes to prom_{32,64}.c have been dropped.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/kernel/auxio_64.c | 4 ++--
 arch/sparc/kernel/power.c    | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
index 6145658d915a..e1b10f88ffb4 100644
--- a/arch/sparc/kernel/auxio_64.c
+++ b/arch/sparc/kernel/auxio_64.c
@@ -115,8 +115,8 @@ static int auxio_probe(struct platform_device *dev)
 		auxio_devtype = AUXIO_TYPE_SBUS;
 		size = 1;
 	} else {
-		printk("auxio: Unknown parent bus type [%s]\n",
-		       dp->parent->name);
+		printk("auxio: Unknown parent bus type [%pOFn]\n",
+		       dp->parent);
 		return -ENODEV;
 	}
 	auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
diff --git a/arch/sparc/kernel/power.c b/arch/sparc/kernel/power.c
index 92627abce311..d941875dd718 100644
--- a/arch/sparc/kernel/power.c
+++ b/arch/sparc/kernel/power.c
@@ -41,8 +41,8 @@ static int power_probe(struct platform_device *op)
 
 	power_reg = of_ioremap(res, 0, 0x4, "power");
 
-	printk(KERN_INFO "%s: Control reg at %llx\n",
-	       op->dev.of_node->name, res->start);
+	printk(KERN_INFO "%pOFn: Control reg at %llx\n",
+	       op->dev.of_node, res->start);
 
 	if (has_button_interrupt(irq, op->dev.of_node)) {
 		if (request_irq(irq,
-- 
2.19.1

[PATCH 6/8] sparc: Use of_node_name_eq for node name comparisons

[Rob Herring]

Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/kernel/auxio_64.c         |  4 ++--
 arch/sparc/kernel/central.c          |  2 +-
 arch/sparc/kernel/irq_64.c           |  2 +-
 arch/sparc/kernel/of_device_32.c     |  8 ++++----
 arch/sparc/kernel/of_device_64.c     | 20 ++++++++++----------
 arch/sparc/kernel/of_device_common.c |  4 ++--
 arch/sparc/kernel/pci.c              |  4 ++--
 arch/sparc/kernel/pci_sabre.c        |  2 +-
 arch/sparc/kernel/prom_64.c          |  4 ++--
 arch/sparc/kernel/prom_irqtrans.c    | 18 +++++++++---------
 arch/sparc/kernel/sun4d_irq.c        |  6 +++---
 arch/sparc/kernel/time_64.c          |  4 ++--
 12 files changed, 39 insertions(+), 39 deletions(-)

diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
index e1b10f88ffb4..4843f48bfe85 100644
--- a/arch/sparc/kernel/auxio_64.c
+++ b/arch/sparc/kernel/auxio_64.c
@@ -108,10 +108,10 @@ static int auxio_probe(struct platform_device *dev)
 	struct device_node *dp = dev->dev.of_node;
 	unsigned long size;
 
-	if (!strcmp(dp->parent->name, "ebus")) {
+	if (of_node_name_eq(dp->parent, "ebus")) {
 		auxio_devtype = AUXIO_TYPE_EBUS;
 		size = sizeof(u32);
-	} else if (!strcmp(dp->parent->name, "sbus")) {
+	} else if (of_node_name_eq(dp->parent, "sbus")) {
 		auxio_devtype = AUXIO_TYPE_SBUS;
 		size = 1;
 	} else {
diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c
index 38ae4fdc9eb4..bfae98ab8638 100644
--- a/arch/sparc/kernel/central.c
+++ b/arch/sparc/kernel/central.c
@@ -168,7 +168,7 @@ static int fhc_probe(struct platform_device *op)
 		goto out;
 	}
 
-	if (!strcmp(op->dev.of_node->parent->name, "central"))
+	if (of_node_name_eq(op->dev.of_node->parent, "central"))
 		p->central = true;
 
 	p->pregs = of_ioremap(&op->resource[0], 0,
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index 713670e6d13d..3ec9f1402aad 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -915,7 +915,7 @@ static void map_prom_timers(void)
 	dp = of_find_node_by_path("/");
 	dp = dp->child;
 	while (dp) {
-		if (!strcmp(dp->name, "counter-timer"))
+		if (of_node_name_eq(dp, "counter-timer"))
 			break;
 		dp = dp->sibling;
 	}
diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index ab133e2753ab..dc5b1b0ec659 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -232,10 +232,10 @@ static int __init use_1to1_mapping(struct device_node *pp)
 	 * But, we should still pass the translation work up
 	 * to the SBUS itself.
 	 */
-	if (!strcmp(pp->name, "dma") ||
-	    !strcmp(pp->name, "espdma") ||
-	    !strcmp(pp->name, "ledma") ||
-	    !strcmp(pp->name, "lebuffer"))
+	if (of_node_name_eq(pp, "dma") ||
+	    of_node_name_eq(pp, "espdma") ||
+	    of_node_name_eq(pp, "ledma") ||
+	    of_node_name_eq(pp, "lebuffer"))
 		return 0;
 
 	return 1;
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 2353cb7bc40f..4b5eabb20ac8 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -46,7 +46,7 @@ EXPORT_SYMBOL(of_iounmap);
 
 static int of_bus_pci_match(struct device_node *np)
 {
-	if (!strcmp(np->name, "pci")) {
+	if (of_node_name_eq(np, "pci")) {
 		const char *model = of_get_property(np, "model", NULL);
 
 		if (model && !strcmp(model, "SUNW,simba"))
@@ -77,7 +77,7 @@ static int of_bus_simba_match(struct device_node *np)
 	/* Treat PCI busses lacking ranges property just like
 	 * simba.
 	 */
-	if (!strcmp(np->name, "pci")) {
+	if (of_node_name_eq(np, "pci")) {
 		if (!of_find_property(np, "ranges", NULL))
 			return 1;
 	}
@@ -170,8 +170,8 @@ static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
  */
 static int of_bus_fhc_match(struct device_node *np)
 {
-	return !strcmp(np->name, "fhc") ||
-		!strcmp(np->name, "central");
+	return of_node_name_eq(np, "fhc") ||
+		of_node_name_eq(np, "central");
 }
 
 #define of_bus_fhc_count_cells of_bus_sbus_count_cells
@@ -295,17 +295,17 @@ static int __init use_1to1_mapping(struct device_node *pp)
 	 * But, we should still pass the translation work up
 	 * to the SBUS itself.
 	 */
-	if (!strcmp(pp->name, "dma") ||
-	    !strcmp(pp->name, "espdma") ||
-	    !strcmp(pp->name, "ledma") ||
-	    !strcmp(pp->name, "lebuffer"))
+	if (of_node_name_eq(pp, "dma") ||
+	    of_node_name_eq(pp, "espdma") ||
+	    of_node_name_eq(pp, "ledma") ||
+	    of_node_name_eq(pp, "lebuffer"))
 		return 0;
 
 	/* Similarly for all PCI bridges, if we get this far
 	 * it lacks a ranges property, and this will include
 	 * cases like Simba.
 	 */
-	if (!strcmp(pp->name, "pci"))
+	if (of_node_name_eq(pp, "pci"))
 		return 0;
 
 	return 1;
@@ -591,7 +591,7 @@ static unsigned int __init build_one_device_irq(struct platform_device *op,
 				break;
 			}
 		} else {
-			if (!strcmp(pp->name, "pci")) {
+			if (of_node_name_eq(pp, "pci")) {
 				unsigned int this_orig_irq = irq;
 
 				irq = pci_irq_swizzle(dp, pp, irq);
diff --git a/arch/sparc/kernel/of_device_common.c b/arch/sparc/kernel/of_device_common.c
index de0ee3971f00..b186b7f0f6c4 100644
--- a/arch/sparc/kernel/of_device_common.c
+++ b/arch/sparc/kernel/of_device_common.c
@@ -151,8 +151,8 @@ int of_bus_sbus_match(struct device_node *np)
 	struct device_node *dp = np;
 
 	while (dp) {
-		if (!strcmp(dp->name, "sbus") ||
-		    !strcmp(dp->name, "sbi"))
+		if (of_node_name_eq(dp, "sbus") ||
+		    of_node_name_eq(dp, "sbi"))
 			return 1;
 
 		/* Have a look at use_1to1_mapping().  We're trying
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 45ba2757a1b9..377113ae9a6a 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -283,7 +283,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	sd->stc = &pbm->stc;
 	sd->numa_node = pbm->numa_node;
 
-	if (!strcmp(node->name, "ebus"))
+	if (of_node_name_eq(node, "ebus"))
 		of_propagate_archdata(op);
 
 	type = of_get_property(node, "device_type", NULL);
@@ -336,7 +336,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	dev->error_state = pci_channel_io_normal;
 	dev->dma_mask = 0xffffffff;
 
-	if (!strcmp(node->name, "pci")) {
+	if (of_node_name_eq(node, "pci")) {
 		/* a PCI-PCI bridge */
 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
 		dev->rom_base_reg = PCI_ROM_ADDRESS1;
diff --git a/arch/sparc/kernel/pci_sabre.c b/arch/sparc/kernel/pci_sabre.c
index 8107286be9ab..3c38ca40a22b 100644
--- a/arch/sparc/kernel/pci_sabre.c
+++ b/arch/sparc/kernel/pci_sabre.c
@@ -475,7 +475,7 @@ static int sabre_probe(struct platform_device *op)
 		 * different ways, inconsistently.
 		 */
 		for_each_node_by_type(cpu_dp, "cpu") {
-			if (!strcmp(cpu_dp->name, "SUNW,UltraSPARC-IIe"))
+			if (of_node_name_eq(cpu_dp, "SUNW,UltraSPARC-IIe"))
 				hummingbird_p = 1;
 		}
 	}
diff --git a/arch/sparc/kernel/prom_64.c b/arch/sparc/kernel/prom_64.c
index 1667df573f6f..17860d6ed1bd 100644
--- a/arch/sparc/kernel/prom_64.c
+++ b/arch/sparc/kernel/prom_64.c
@@ -335,8 +335,8 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 			ebus_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->name, "usb") ||
-		    !strcmp(parent->name, "hub")) {
+		if (of_node_name_eq(parent, "usb") ||
+		    of_node_name_eq(parent, "hub")) {
 			usb_path_component(dp, tmp_buf);
 			return;
 		}
diff --git a/arch/sparc/kernel/prom_irqtrans.c b/arch/sparc/kernel/prom_irqtrans.c
index f3fecac7facb..f76b4ae697f5 100644
--- a/arch/sparc/kernel/prom_irqtrans.c
+++ b/arch/sparc/kernel/prom_irqtrans.c
@@ -725,11 +725,11 @@ static unsigned int central_build_irq(struct device_node *dp,
 	unsigned long imap, iclr;
 	u32 tmp;
 
-	if (!strcmp(dp->name, "eeprom")) {
+	if (of_node_name_eq(dp, "eeprom")) {
 		res = &central_op->resource[5];
-	} else if (!strcmp(dp->name, "zs")) {
+	} else if (of_node_name_eq(dp, "zs")) {
 		res = &central_op->resource[4];
-	} else if (!strcmp(dp->name, "clock-board")) {
+	} else if (of_node_name_eq(dp, "clock-board")) {
 		res = &central_op->resource[3];
 	} else {
 		return ino;
@@ -824,19 +824,19 @@ void __init irq_trans_init(struct device_node *dp)
 	}
 #endif
 #ifdef CONFIG_SBUS
-	if (!strcmp(dp->name, "sbus") ||
-	    !strcmp(dp->name, "sbi")) {
+	if (of_node_name_eq(dp, "sbus") ||
+	    of_node_name_eq(dp, "sbi")) {
 		sbus_irq_trans_init(dp);
 		return;
 	}
 #endif
-	if (!strcmp(dp->name, "fhc") &&
-	    !strcmp(dp->parent->name, "central")) {
+	if (of_node_name_eq(dp, "fhc") &&
+	    of_node_name_eq(dp->parent, "central")) {
 		central_irq_trans_init(dp);
 		return;
 	}
-	if (!strcmp(dp->name, "virtual-devices") ||
-	    !strcmp(dp->name, "niu")) {
+	if (of_node_name_eq(dp, "virtual-devices") ||
+	    of_node_name_eq(dp, "niu")) {
 		sun4v_vdev_irq_trans_init(dp);
 		return;
 	}
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index 6d266d7dd2b6..9a137c70e8d1 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -335,12 +335,12 @@ static unsigned int sun4d_build_device_irq(struct platform_device *op,
 
 	irq = real_irq;
 	while (bus) {
-		if (!strcmp(bus->name, "sbi")) {
+		if (of_node_name_eq(bus, "sbi")) {
 			bus_connection = "io-unit";
 			break;
 		}
 
-		if (!strcmp(bus->name, "bootbus")) {
+		if (of_node_name_eq(bus, "bootbus")) {
 			bus_connection = "cpu-unit";
 			break;
 		}
@@ -360,7 +360,7 @@ static unsigned int sun4d_build_device_irq(struct platform_device *op,
 	 * If Bus nodes parent is not io-unit/cpu-unit or the io-unit/cpu-unit
 	 * lacks a "board#" property, something is very wrong.
 	 */
-	if (!bus->parent || strcmp(bus->parent->name, bus_connection)) {
+	if (!of_node_name_eq(bus->parent, bus_connection)) {
 		printk(KERN_ERR "%pOF: Error, parent is not %s.\n",
 			bus, bus_connection);
 		goto err_out;
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index 68a80f9baea7..3eb77943ce12 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -561,8 +561,8 @@ static int mostek_probe(struct platform_device *op)
 	/* On an Enterprise system there can be multiple mostek clocks.
 	 * We should only match the one that is on the central FHC bus.
 	 */
-	if (!strcmp(dp->parent->name, "fhc") &&
-	    strcmp(dp->parent->parent->name, "central") != 0)
+	if (of_node_name_eq(dp->parent, "fhc") &&
+	    !of_node_name_eq(dp->parent->parent, "central"))
 		return -ENODEV;
 
 	printk(KERN_INFO "%pOF: Mostek regs at 0x%llx\n",
-- 
2.19.1

[PATCH 7/8] sparc: Remove unused leon_trans_init

[Rob Herring]

The function leon_trans_init is unused. Remove it and save us from
figuring out what to do with a '<NULL>' node name.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/include/asm/leon.h   |  1 -
 arch/sparc/kernel/leon_kernel.c | 14 --------------
 2 files changed, 15 deletions(-)

diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h
index c68bb5b76e3d..8c01f0f6b1ed 100644
--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
@@ -225,7 +225,6 @@ void leon_update_virq_handling(unsigned int virq,
 			       irq_flow_handler_t flow_handler,
 			       const char *name, int do_ack);
 void leon_init_timers(void);
-void leon_trans_init(struct device_node *dp);
 void leon_node_init(struct device_node *dp, struct device_node ***nextp);
 void init_leon(void);
 void poke_leonsparc(void);
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index 84b233752f28..39229940d725 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -484,20 +484,6 @@ static void leon_load_profile_irq(int cpu, unsigned int limit)
 {
 }
 
-void __init leon_trans_init(struct device_node *dp)
-{
-	if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
-		struct property *p;
-		p = of_find_property(dp, "mid", (void *)0);
-		if (p) {
-			int mid;
-			dp->name = prom_early_alloc(5 + 1);
-			memcpy(&mid, p->value, p->length);
-			sprintf((char *)dp->name, "cpu%.2d", mid);
-		}
-	}
-}
-
 #ifdef CONFIG_SMP
 void leon_clear_profile_irq(int cpu)
 {
-- 
2.19.1

[PATCH 8/8] sparc: Use device_type helpers to access the node type

[Rob Herring]

Remove directly accessing device_node.type pointer and use the accessors
instead. This will eventually allow removing the type pointer.

Replace the open coded iterating over child nodes with
for_each_child_of_node() while we're here.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 arch/sparc/kernel/of_device_32.c  |  4 ++--
 arch/sparc/kernel/pci.c           |  9 ++-------
 arch/sparc/kernel/process_32.c    |  2 +-
 arch/sparc/kernel/prom_32.c       | 20 +++++++-------------
 arch/sparc/kernel/prom_64.c       | 24 +++++++++---------------
 arch/sparc/kernel/prom_irqtrans.c |  2 +-
 arch/sparc/kernel/reboot.c        |  3 ++-
 arch/sparc/kernel/vio.c           |  7 ++-----
 8 files changed, 26 insertions(+), 45 deletions(-)

diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index dc5b1b0ec659..ee4841a96058 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -22,7 +22,7 @@
 
 static int of_bus_pci_match(struct device_node *np)
 {
-	if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) {
+	if (of_node_is_type(np, "pci") || of_node_is_type(np, "pciex")) {
 		/* Do not do PCI specific frobbing if the
 		 * PCI bridge lacks a ranges property.  We
 		 * want to pass it through up to the next
@@ -107,7 +107,7 @@ static unsigned long of_bus_sbus_get_flags(const u32 *addr, unsigned long flags)
 
 static int of_bus_ambapp_match(struct device_node *np)
 {
-	return !strcmp(np->type, "ambapp");
+	return of_node_is_type(np, "ambapp");
 }
 
 static void of_bus_ambapp_count_cells(struct device_node *child,
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 377113ae9a6a..bcfec6a85d23 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -267,7 +267,6 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	struct dev_archdata *sd;
 	struct platform_device *op;
 	struct pci_dev *dev;
-	const char *type;
 	u32 class;
 
 	dev = pci_alloc_dev(bus);
@@ -286,13 +285,9 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 	if (of_node_name_eq(node, "ebus"))
 		of_propagate_archdata(op);
 
-	type = of_get_property(node, "device_type", NULL);
-	if (type == NULL)
-		type = "";
-
 	if (ofpci_verbose)
 		pci_info(bus,"    create device, devfn: %x, type: %s\n",
-			 devfn, type);
+			 devfn, of_node_get_device_type(node));
 
 	dev->sysdata = node;
 	dev->dev.parent = bus->bridge;
@@ -340,7 +335,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
 		/* a PCI-PCI bridge */
 		dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
 		dev->rom_base_reg = PCI_ROM_ADDRESS1;
-	} else if (!strcmp(type, "cardbus")) {
+	} else if (of_node_is_type(node, "cardbus")) {
 		dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
 	} else {
 		dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index d9662cf7e648..26cca65e9246 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -110,7 +110,7 @@ void machine_restart(char * cmd)
 void machine_power_off(void)
 {
 	if (auxio_power_register &&
-	    (strcmp(of_console_device->type, "serial") || scons_pwroff)) {
+	    (!of_node_is_type(of_console_device, "serial") || scons_pwroff)) {
 		u8 power_register = sbus_readb(auxio_power_register);
 		power_register |= AUXIO_POWER_OFF;
 		sbus_writeb(power_register, auxio_power_register);
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index f2835cddf362..42d7f2a7da6d 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -182,14 +182,14 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 	struct device_node *parent = dp->parent;
 
 	if (parent != NULL) {
-		if (!strcmp(parent->type, "pci") ||
-		    !strcmp(parent->type, "pciex"))
+		if (of_node_is_type(parent, "pci") ||
+		    of_node_is_type(parent, "pciex"))
 			return pci_path_component(dp, tmp_buf);
-		if (!strcmp(parent->type, "sbus"))
+		if (of_node_is_type(parent, "sbus"))
 			return sbus_path_component(dp, tmp_buf);
-		if (!strcmp(parent->type, "ebus"))
+		if (of_node_is_type(parent, "ebus"))
 			return ebus_path_component(dp, tmp_buf);
-		if (!strcmp(parent->type, "ambapp"))
+		if (of_node_is_type(parent, "ambapp"))
 			return ambapp_path_component(dp, tmp_buf);
 
 		/* "isa" is handled with platform naming */
@@ -284,15 +284,9 @@ void __init of_console_init(void)
 			prom_halt();
 		}
 		dp = of_find_node_by_phandle(node);
-		type = of_get_property(dp, "device_type", NULL);
 
-		if (!type) {
-			prom_printf("Console stdout lacks "
-				    "device_type property.\n");
-			prom_halt();
-		}
-
-		if (strcmp(type, "display") && strcmp(type, "serial")) {
+		if (!of_node_is_type(dp, "display") &&
+		    !of_node_is_type(dp, "serial")) {
 			prom_printf("Console device_type is neither display "
 				    "nor serial.\n");
 			prom_halt();
diff --git a/arch/sparc/kernel/prom_64.c b/arch/sparc/kernel/prom_64.c
index 17860d6ed1bd..e897a4ded3a1 100644
--- a/arch/sparc/kernel/prom_64.c
+++ b/arch/sparc/kernel/prom_64.c
@@ -318,20 +318,20 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 	struct device_node *parent = dp->parent;
 
 	if (parent != NULL) {
-		if (!strcmp(parent->type, "pci") ||
-		    !strcmp(parent->type, "pciex")) {
+		if (of_node_is_type(parent, "pci") ||
+		    of_node_is_type(parent, "pciex")) {
 			pci_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "sbus")) {
+		if (of_node_is_type(parent, "sbus")) {
 			sbus_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "upa")) {
+		if (of_node_is_type(parent, "upa")) {
 			upa_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "ebus")) {
+		if (of_node_is_type(parent, "ebus")) {
 			ebus_path_component(dp, tmp_buf);
 			return;
 		}
@@ -340,15 +340,15 @@ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
 			usb_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "i2c")) {
+		if (of_node_is_type(parent, "i2c")) {
 			i2c_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "firewire")) {
+		if (of_node_is_type(parent, "firewire")) {
 			ieee1394_path_component(dp, tmp_buf);
 			return;
 		}
-		if (!strcmp(parent->type, "virtual-devices")) {
+		if (of_node_is_type(parent, "virtual-devices")) {
 			vdev_path_component(dp, tmp_buf);
 			return;
 		}
@@ -605,7 +605,6 @@ void __init of_console_init(void)
 {
 	char *msg = "OF stdout device is: %s\n";
 	struct device_node *dp;
-	const char *type;
 	phandle node;
 
 	of_console_path = prom_early_alloc(256);
@@ -628,13 +627,8 @@ void __init of_console_init(void)
 	}
 
 	dp = of_find_node_by_phandle(node);
-	type = of_get_property(dp, "device_type", NULL);
-	if (!type) {
-		prom_printf("Console stdout lacks device_type property.\n");
-		prom_halt();
-	}
 
-	if (strcmp(type, "display") && strcmp(type, "serial")) {
+	if (!of_node_is_type(dp, "display") && !of_node_is_type(dp, "serial")) {
 		prom_printf("Console device_type is neither display "
 			    "nor serial.\n");
 		prom_halt();
diff --git a/arch/sparc/kernel/prom_irqtrans.c b/arch/sparc/kernel/prom_irqtrans.c
index f76b4ae697f5..28aff1c524b5 100644
--- a/arch/sparc/kernel/prom_irqtrans.c
+++ b/arch/sparc/kernel/prom_irqtrans.c
@@ -193,7 +193,7 @@ static int sabre_device_needs_wsync(struct device_node *dp)
 	 *    the DMA synchronization handling
 	 */
 	while (parent) {
-		if (!strcmp(parent->type, "pci"))
+		if (of_node_is_type(parent, "pci"))
 			break;
 		parent = parent->parent;
 	}
diff --git a/arch/sparc/kernel/reboot.c b/arch/sparc/kernel/reboot.c
index 7933ee365207..69c1b6c047d5 100644
--- a/arch/sparc/kernel/reboot.c
+++ b/arch/sparc/kernel/reboot.c
@@ -7,6 +7,7 @@
 #include <linux/reboot.h>
 #include <linux/export.h>
 #include <linux/pm.h>
+#include <linux/of.h>
 
 #include <asm/oplib.h>
 #include <asm/prom.h>
@@ -25,7 +26,7 @@ EXPORT_SYMBOL(pm_power_off);
 
 void machine_power_off(void)
 {
-	if (strcmp(of_console_device->type, "serial") || scons_pwroff)
+	if (!of_node_is_type(of_console_device, "serial") || scons_pwroff)
 		prom_halt_power_off();
 
 	prom_halt();
diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c
index 0b578d03797b..c7cad9b7bba7 100644
--- a/arch/sparc/kernel/vio.c
+++ b/arch/sparc/kernel/vio.c
@@ -366,12 +366,9 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
 	if (parent == NULL) {
 		dp = cdev_node;
 	} else if (to_vio_dev(parent) == root_vdev) {
-		dp = of_get_next_child(cdev_node, NULL);
-		while (dp) {
-			if (!strcmp(dp->type, type))
+		for_each_child_of_node(cdev_node, dp) {
+			if (of_node_is_type(dp, type))
 				break;
-
-			dp = of_get_next_child(cdev_node, dp);
 		}
 	} else {
 		dp = to_vio_dev(parent)->dp;
-- 
2.19.1