regulator_coupler_register
regulator_coupler_register(&generic_regulator_coupler);
return regulator_coupler_register(&mediatek_coupler.coupler);
return regulator_coupler_register(&exynos_coupler);
return regulator_coupler_register(&tegra20_coupler.coupler);
return regulator_coupler_register(&tegra30_coupler.coupler);
int regulator_coupler_register(struct regulator_coupler *coupler);