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regulator/of_get_regulator: add child path to find the regulator supplier
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.cool@163.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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1 changed files with 35 additions and 0 deletions
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@ -227,6 +227,37 @@ static void regulator_unlock_supply(struct regulator_dev *rdev)
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}
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}
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}
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}
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/**
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* of_get_child_regulator - get a child regulator device node
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* based on supply name
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* @parent: Parent device node
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* @prop_name: Combination regulator supply name and "-supply"
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*
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* Traverse all child nodes.
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* Extract the child regulator device node corresponding to the supply name.
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* returns the device node corresponding to the regulator if found, else
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* returns NULL.
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*/
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static struct device_node *of_get_child_regulator(struct device_node *parent,
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const char *prop_name)
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{
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struct device_node *regnode = NULL;
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struct device_node *child = NULL;
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for_each_child_of_node(parent, child) {
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regnode = of_parse_phandle(child, prop_name, 0);
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if (!regnode) {
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regnode = of_get_child_regulator(child, prop_name);
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if (regnode)
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return regnode;
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} else {
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return regnode;
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}
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}
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return NULL;
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}
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/**
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/**
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* of_get_regulator - get a regulator device node based on supply name
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* of_get_regulator - get a regulator device node based on supply name
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* @dev: Device pointer for the consumer (of regulator) device
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* @dev: Device pointer for the consumer (of regulator) device
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@ -247,6 +278,10 @@ static struct device_node *of_get_regulator(struct device *dev, const char *supp
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regnode = of_parse_phandle(dev->of_node, prop_name, 0);
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regnode = of_parse_phandle(dev->of_node, prop_name, 0);
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if (!regnode) {
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if (!regnode) {
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regnode = of_get_child_regulator(dev->of_node, prop_name);
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if (regnode)
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return regnode;
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dev_dbg(dev, "Looking up %s property in node %pOF failed\n",
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dev_dbg(dev, "Looking up %s property in node %pOF failed\n",
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prop_name, dev->of_node);
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prop_name, dev->of_node);
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return NULL;
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return NULL;
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