regulator_get_optional
pu_reg = regulator_get_optional(cpu_dev, "pu");
info->proc_reg = regulator_get_optional(cpu_dev, "proc");
info->sram_reg = regulator_get_optional(cpu_dev, "sram");
regulator = regulator_get_optional(&pdev->dev, name);
framer->pwr = regulator_get_optional(&framer->dev, "framer");
reg = regulator_get_optional(dev, names[i]);
phy->pwr = regulator_get_optional(&phy->dev, "phy");
regulator = regulator_get_optional(dev, "cht_wc_usb_typec_vbus");
EXPORT_SYMBOL_GPL(regulator_get_optional);
vbus_supply = regulator_get_optional(dev, "vbus");
struct regulator *__must_check regulator_get_optional(struct device *dev,
vddd = regulator_get_optional(&client->dev, "VDDD");