Merge branch 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Required properties:

- opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. This is a

  required property for all device nodes but devices like power domains. The

  power domain nodes must have another (implementation dependent) property which

  uniquely identifies the OPP nodes.

  required property for all device nodes, unless another "required" property to

  uniquely identify the OPP nodes exists. Devices like power domains must have

  another (implementation dependent) property.

- opp-peak-kBps: Peak bandwidth in kilobytes per second, expressed as an array

  of 32-bit big-endian integers. Each element of the array represents the

  peak bandwidth value of each interconnect path. The number of elements should

  match the number of interconnect paths.

Optional properties:

- opp-microvolt: voltage in micro Volts.

- opp-level: A value representing the performance level of the device,

  expressed as a 32-bit integer.

- opp-avg-kBps: Average bandwidth in kilobytes per second, expressed as an array

  of 32-bit big-endian integers. Each element of the array represents the

  average bandwidth value of each interconnect path. The number of elements

  should match the number of interconnect paths. This property is only

  meaningful in OPP tables where opp-peak-kBps is present.

- clock-latency-ns: Specifies the maximum possible transition latency (in

  nanoseconds) for switching to this OPP from any other OPP.

Pressure

----------------------------------------

-kpascal	: kilopascal

Throughput

----------------------------------------

-kBps		: kilobytes per second

	clk_put(cpu_clk);

	ret = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);

	if (ret)

		return ret;

	name = find_supply_name(cpu_dev);

	/* Platform doesn't require regulator */

	if (!name)

# SPDX-License-Identifier: GPL-2.0-only

menuconfig INTERCONNECT

	tristate "On-Chip Interconnect management support"

	bool "On-Chip Interconnect management support"

	help

	  Support for management of the on-chip interconnects.

}

/**

 * of_icc_get() - get a path handle from a DT node based on name

 * of_icc_get_by_index() - get a path handle from a DT node based on index

 * @dev: device pointer for the consumer device

 * @name: interconnect path name

 * @idx: interconnect path index

 *

 * This function will search for a path between two endpoints and return an

 * icc_path handle on success. Use icc_put() to release constraints when they

 * Return: icc_path pointer on success or ERR_PTR() on error. NULL is returned

 * when the API is disabled or the "interconnects" DT property is missing.

 */

struct icc_path *of_icc_get(struct device *dev, const char *name)

struct icc_path *of_icc_get_by_index(struct device *dev, int idx)

{

	struct icc_path *path = ERR_PTR(-EPROBE_DEFER);

	struct icc_path *path;

	struct icc_node *src_node, *dst_node;

	struct device_node *np = NULL;

	struct device_node *np;

	struct of_phandle_args src_args, dst_args;

	int idx = 0;

	int ret;

	if (!dev || !dev->of_node)

	 * lets support only global ids and extend this in the future if needed

	 * without breaking DT compatibility.

	 */

	if (name) {

		idx = of_property_match_string(np, "interconnect-names", name);

		if (idx < 0)

			return ERR_PTR(idx);

	}

	ret = of_parse_phandle_with_args(np, "interconnects",

					 "#interconnect-cells", idx * 2,

					 &src_args);

		return path;

	}

	if (name)

		path->name = kstrdup_const(name, GFP_KERNEL);

	else

	path->name = kasprintf(GFP_KERNEL, "%s-%s",

			       src_node->name, dst_node->name);

	if (!path->name) {

		kfree(path);

		return ERR_PTR(-ENOMEM);

	return path;

}

EXPORT_SYMBOL_GPL(of_icc_get_by_index);

/**

 * of_icc_get() - get a path handle from a DT node based on name

 * @dev: device pointer for the consumer device

 * @name: interconnect path name

 *

 * This function will search for a path between two endpoints and return an

 * icc_path handle on success. Use icc_put() to release constraints when they

 * are not needed anymore.

 * If the interconnect API is disabled, NULL is returned and the consumer

 * drivers will still build. Drivers are free to handle this specifically,

 * but they don't have to.

 *

 * Return: icc_path pointer on success or ERR_PTR() on error. NULL is returned

 * when the API is disabled or the "interconnects" DT property is missing.

 */

struct icc_path *of_icc_get(struct device *dev, const char *name)

{

	struct device_node *np;

	int idx = 0;

	if (!dev || !dev->of_node)

		return ERR_PTR(-ENODEV);

	np = dev->of_node;

	/*

	 * When the consumer DT node do not have "interconnects" property

	 * return a NULL path to skip setting constraints.

	 */

	if (!of_find_property(np, "interconnects", NULL))

		return NULL;

	/*

	 * We use a combination of phandle and specifier for endpoint. For now

	 * lets support only global ids and extend this in the future if needed

	 * without breaking DT compatibility.

	 */

	if (name) {

		idx = of_property_match_string(np, "interconnect-names", name);

		if (idx < 0)

			return ERR_PTR(idx);

	}

	return of_icc_get_by_index(dev, idx);

}

EXPORT_SYMBOL_GPL(of_icc_get);

/**

}

EXPORT_SYMBOL_GPL(icc_set_tag);

/**

 * icc_get_name() - Get name of the icc path

 * @path: reference to the path returned by icc_get()

 *

 * This function is used by an interconnect consumer to get the name of the icc

 * path.

 *

 * Returns a valid pointer on success, or NULL otherwise.

 */

const char *icc_get_name(struct icc_path *path)

{

	if (!path)

		return NULL;

	return path->name;

}

EXPORT_SYMBOL_GPL(icc_get_name);

/**

 * icc_set_bw() - set bandwidth constraints on an interconnect path

 * @path: reference to the path returned by icc_get()

	return 0;

}

static void __exit icc_exit(void)

{

	debugfs_remove_recursive(icc_debugfs_dir);

}

module_init(icc_init);

module_exit(icc_exit);

device_initcall(icc_init);

MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org>");

MODULE_DESCRIPTION("Interconnect Driver Core");