clk: of-provider: look at parent if registered device has no provider info

	of_clk_del_provider(*(struct device_node **)res);

}

/*

 * We allow a child device to use its parent device as the clock provider node

 * for cases like MFD sub-devices where the child device driver wants to use

 * devm_*() APIs but not list the device in DT as a sub-node.

 */

static struct device_node *get_clk_provider_node(struct device *dev)

{

	struct device_node *np, *parent_np;

	np = dev->of_node;

	parent_np = dev->parent ? dev->parent->of_node : NULL;

	if (!of_find_property(np, "#clock-cells", NULL))

		if (of_find_property(parent_np, "#clock-cells", NULL))

			np = parent_np;

	return np;

}

/**

 * devm_of_clk_add_hw_provider() - Managed clk provider node registration

 * @dev: Device acting as the clock provider (used for DT node and lifetime)

 * @get: callback for decoding clk_hw

 * @data: context pointer for @get callback

 *

 * Registers clock provider for given device's node. Provider is automatically

 * released at device exit.

 * Registers clock provider for given device's node. If the device has no DT

 * node or if the device node lacks of clock provider information (#clock-cells)

 * then the parent device's node is scanned for this information. If parent node

 * has the #clock-cells then it is used in registration. Provider is

 * automatically released at device exit.

 *

 * Return: 0 on success or an errno on failure.

 */

	if (!ptr)

		return -ENOMEM;

	np = dev->of_node;

	np = get_clk_provider_node(dev);

	ret = of_clk_add_hw_provider(np, get, data);

	if (!ret) {

		*ptr = np;

void devm_of_clk_del_provider(struct device *dev)

{

	int ret;

	struct device_node *np = get_clk_provider_node(dev);

	ret = devres_release(dev, devm_of_clk_release_provider,

			     devm_clk_provider_match, dev->of_node);

			     devm_clk_provider_match, np);

	WARN_ON(ret);

}