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Subject[PATCH] regulator/of_get_regulator: add child path to find the regulator supplier
Date
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>;
};
...
};

when the VIR_LDO1 regulator supplier is it's brother,
we can't find the supplier.
so we add the child ptah to find the suppier.

Signed-off-by: zoro <long17.cool@163.com>
---
drivers/regulator/core.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 2c66b52..5dbfdba 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -239,6 +239,7 @@ static void regulator_unlock_supply(struct regulator_dev *rdev)
static struct device_node *of_get_regulator(struct device *dev, const char *supply)
{
struct device_node *regnode = NULL;
+ struct device_node *child = NULL;
char prop_name[32]; /* 32 is max size of property name */

dev_dbg(dev, "Looking up %s-supply from device tree\n", supply);
@@ -247,6 +248,11 @@ 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) {
+ for_each_child_of_node(dev->of_node, child) {
+ regnode = of_parse_phandle(child, prop_name, 0);
+ 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
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