dm: core: Replace of_offset with accessor

At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/power/pmic/act8846.c b/drivers/power/pmic/act8846.c
index e8164bf..15da12e 100644
--- a/drivers/power/pmic/act8846.c
+++ b/drivers/power/pmic/act8846.c
@@ -52,7 +52,7 @@
 	int regulators_node;
 	int children;
 
-	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
 					     "regulators");
 	if (regulators_node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,
diff --git a/drivers/power/pmic/i2c_pmic_emul.c b/drivers/power/pmic/i2c_pmic_emul.c
index aeab5c9..4f92e3d 100644
--- a/drivers/power/pmic/i2c_pmic_emul.c
+++ b/drivers/power/pmic/i2c_pmic_emul.c
@@ -108,9 +108,9 @@
 
 	debug("%s:%d Setting PMIC default registers\n", __func__, __LINE__);
 
-	reg_defaults = fdtdec_locate_byte_array(gd->fdt_blob, emul->of_offset,
-						"reg-defaults",
-						SANDBOX_PMIC_REG_COUNT);
+	reg_defaults = fdtdec_locate_byte_array(gd->fdt_blob,
+			dev_of_offset(emul), "reg-defaults",
+			SANDBOX_PMIC_REG_COUNT);
 
 	if (!reg_defaults) {
 		error("Property \"reg-defaults\" not found for device: %s!",
diff --git a/drivers/power/pmic/lp873x.c b/drivers/power/pmic/lp873x.c
index 307f96b..d8f30df 100644
--- a/drivers/power/pmic/lp873x.c
+++ b/drivers/power/pmic/lp873x.c
@@ -49,7 +49,7 @@
 	int regulators_node;
 	const void *blob = gd->fdt_blob;
 	int children;
-	int node = dev->of_offset;
+	int node = dev_of_offset(dev);
 
 	regulators_node = fdt_subnode_offset(blob, node, "regulators");
 
diff --git a/drivers/power/pmic/max77686.c b/drivers/power/pmic/max77686.c
index dc5a54a..8295fab 100644
--- a/drivers/power/pmic/max77686.c
+++ b/drivers/power/pmic/max77686.c
@@ -54,7 +54,7 @@
 	const void *blob = gd->fdt_blob;
 	int children;
 
-	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
 					     "voltage-regulators");
 	if (regulators_node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,
diff --git a/drivers/power/pmic/palmas.c b/drivers/power/pmic/palmas.c
index 0ab425e..f5a2307 100644
--- a/drivers/power/pmic/palmas.c
+++ b/drivers/power/pmic/palmas.c
@@ -49,7 +49,7 @@
 	int pmic_node = -1, regulators_node;
 	const void *blob = gd->fdt_blob;
 	int children;
-	int node = dev->of_offset;
+	int node = dev_of_offset(dev);
 	int subnode, len;
 
 	fdt_for_each_subnode(subnode, blob, node) {
diff --git a/drivers/power/pmic/pfuze100.c b/drivers/power/pmic/pfuze100.c
index 3beb48e..90a43f2 100644
--- a/drivers/power/pmic/pfuze100.c
+++ b/drivers/power/pmic/pfuze100.c
@@ -56,7 +56,7 @@
 	int regulators_node;
 	const void *blob = gd->fdt_blob;
 
-	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
 					     "regulators");
 	if (regulators_node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,
diff --git a/drivers/power/pmic/pmic-uclass.c b/drivers/power/pmic/pmic-uclass.c
index 7211026..0f7fa51 100644
--- a/drivers/power/pmic/pmic-uclass.c
+++ b/drivers/power/pmic/pmic-uclass.c
@@ -33,7 +33,7 @@
 	int ret;
 
 	debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
-	      pmic->of_offset);
+	      dev_of_offset(pmic));
 
 	for (node = fdt_first_subnode(blob, offset);
 	     node > 0;
diff --git a/drivers/power/pmic/rk808.c b/drivers/power/pmic/rk808.c
index 770f471..3f5f316 100644
--- a/drivers/power/pmic/rk808.c
+++ b/drivers/power/pmic/rk808.c
@@ -61,7 +61,7 @@
 	int regulators_node;
 	int children;
 
-	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
 					     "regulators");
 	if (regulators_node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,
diff --git a/drivers/power/pmic/s5m8767.c b/drivers/power/pmic/s5m8767.c
index 075fe7e..25d673b 100644
--- a/drivers/power/pmic/s5m8767.c
+++ b/drivers/power/pmic/s5m8767.c
@@ -58,7 +58,7 @@
 	const void *blob = gd->fdt_blob;
 	int children;
 
-	node = fdt_subnode_offset(blob, dev->of_offset, "regulators");
+	node = fdt_subnode_offset(blob, dev_of_offset(dev), "regulators");
 	if (node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,
 		      dev->name);
diff --git a/drivers/power/pmic/sandbox.c b/drivers/power/pmic/sandbox.c
index 3e56acd..b4e412e 100644
--- a/drivers/power/pmic/sandbox.c
+++ b/drivers/power/pmic/sandbox.c
@@ -51,7 +51,7 @@
 
 static int sandbox_pmic_bind(struct udevice *dev)
 {
-	if (!pmic_bind_children(dev, dev->of_offset, pmic_children_info))
+	if (!pmic_bind_children(dev, dev_of_offset(dev), pmic_children_info))
 		error("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
 							  dev->name);
 
diff --git a/drivers/power/pmic/tps65090.c b/drivers/power/pmic/tps65090.c
index 4797f32..b30a7f0 100644
--- a/drivers/power/pmic/tps65090.c
+++ b/drivers/power/pmic/tps65090.c
@@ -56,7 +56,7 @@
 	const void *blob = gd->fdt_blob;
 	int children;
 
-	regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
 					     "regulators");
 	if (regulators_node <= 0) {
 		debug("%s: %s regulators subnode not found!", __func__,