regulator: fixed: support deferred probe for DT GPIOs

	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),

								 GFP_KERNEL);

	if (!config)

		return NULL;

		return ERR_PTR(-ENOMEM);

	config->init_data = of_get_regulator_init_data(dev, dev->of_node);

	if (!config->init_data)

		return NULL;

		return ERR_PTR(-EINVAL);

	init_data = config->init_data;

	init_data->constraints.apply_uV = 0;

	} else {

		dev_err(dev,

			 "Fixed regulator specified with variable voltages\n");

		return NULL;

		return ERR_PTR(-EINVAL);

	}

	if (init_data->constraints.boot_on)

		config->enabled_at_boot = true;

	config->gpio = of_get_named_gpio(np, "gpio", 0);

	/*

	 * of_get_named_gpio() currently returns ENODEV rather than

	 * EPROBE_DEFER. This code attempts to be compatible with both

	 * for now; the ENODEV check can be removed once the API is fixed.

	 * of_get_named_gpio() doesn't differentiate between a missing

	 * property (which would be fine here, since the GPIO is optional)

	 * and some other error. Patches have been posted for both issues.

	 * Once they are check in, we should replace this with:

	 * if (config->gpio < 0 && config->gpio != -ENOENT)

	 */

	if ((config->gpio == -ENODEV) || (config->gpio == -EPROBE_DEFER))

		return ERR_PTR(-EPROBE_DEFER);

	delay = of_get_property(np, "startup-delay-us", NULL);

	if (delay)

		config->startup_delay = be32_to_cpu(*delay);

	struct regulator_config cfg = { };

	int ret;

	if (pdev->dev.of_node)

	if (pdev->dev.of_node) {

		config = of_get_fixed_voltage_config(&pdev->dev);

	else

		if (IS_ERR(config))

			return PTR_ERR(config);

	} else {

		config = pdev->dev.platform_data;

	}

	if (!config)

		return -ENOMEM;