power: pmic: s2mps11: probe the regulator driver

Add the probe function to support the s2mps11 regulator driver.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>

drivers/power/pmic/s2mps11.c

@@ -15,6 +15,12 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER },
+	{ .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER },
+	{ },
+};
+
 static int s2mps11_reg_count(struct udevice *dev)
 {
 	return S2MPS11_REG_COUNT;
@@ -43,6 +49,27 @@ static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
 	return ret;
 }
 
+static int s2mps11_probe(struct udevice *dev)
+{
+	ofnode regulators_node;
+	int children;
+
+	regulators_node = dev_read_subnode(dev, "voltage-regulators");
+	if (!ofnode_valid(regulators_node)) {
+		debug("%s: %s regulators subnode not found!", __func__,
+							     dev->name);
+		return -ENXIO;
+	}
+
+	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+	if (!children)
+		debug("%s: %s - no child found\n", __func__, dev->name);
+
+	return 0;
+}
+
 static struct dm_pmic_ops s2mps11_ops = {
 	.reg_count = s2mps11_reg_count,
 	.read = s2mps11_read,
@@ -59,4 +86,5 @@ U_BOOT_DRIVER(pmic_s2mps11) = {
 	.id = UCLASS_PMIC,
 	.of_match = s2mps11_ids,
 	.ops = &s2mps11_ops,
+	.probe = s2mps11_probe,
 };