when the VIR_LDO1 regulator supplier is it's brother,
we can't find the supplier.
example code :
&vir_regulator {
ldo0_vir: ldo0-virtual {
regulator-compatible = "VIR_LDO0";
regulator-name= "VIR_LDO0";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <2000000>;
};
ldo1_vir: ldo1-virtual {
regulator-compatible = "VIR_LDO1";
regulator-name= "VIR_LDO1";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <3000000>;
ldo1-supply = <&ldo0_vir>;
};
}
...
}
so we add the child ptah to find the suppier.
Signed-off-by: zoro <long17.c...@163.com>
---
drivers/regulator/core.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 2c66b52..d328a84 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -228,6 +228,35 @@ static void regulator_unlock_supply(struct regulator_dev
*rdev)
}
/**
+ * of_get_child_regulator - get a child regulator device node
+ * based on supply name
+ * @parent: Parent device node
+ * @prop_name: Combination regulator supply name and "-supply"
+ *
+ * Traverse all child nodes.
+ * Extract the child regulator device node corresponding to the supply name.
+ * returns the device node corresponding to the regulator if found, else
+ * returns NULL.
+ */
+static struct device_node *of_get_child_regulator(struct device_node *parent,
+ const char *prop_name)
+{
+ struct device_node *regnode = NULL;
+ struct device_node *child = NULL;
+
+ for_each_child_of_node(parent, child) {
+ regnode = of_parse_phandle(child, prop_name, 0);
+ if (!regnode) {
+ regnode = of_get_child_regulator(child, prop_name);
+ if (regnode)
+ return regnode;
+ } else
+ return regnode;
+ }
+ return NULL;
+}
+
+/**
* of_get_regulator - get a regulator device node based on supply name
* @dev: Device pointer for the consumer (of regulator) device
* @supply: regulator supply name
@@ -247,6 +276,10 @@ static struct device_node *of_get_regulator(struct device
*dev, const char *supp
regnode = of_parse_phandle(dev->of_node, prop_name, 0);
if (!regnode) {
+ regnode = of_get_child_regulator(dev->of_node, prop_name);
+ if (regnode)
+ return regnode;
+
dev_dbg(dev, "Looking up %s property in node %pOF failed\n",
prop_name, dev->of_node);
return NULL;
--
1.7.9.5
