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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*/
#ifndef _POWER_DOMAIN_UCLASS_H
#define _POWER_DOMAIN_UCLASS_H
/* See power-domain.h for background documentation. */
#include <power-domain.h>
struct udevice;
/**
* struct power_domain_ops - The functions that a power domain controller driver
* must implement.
*/
struct power_domain_ops {
/**
* of_xlate - Translate a client's device-tree (OF) power domain
* specifier.
*
* The power domain core calls this function as the first step in
* implementing a client's power_domain_get() call.
*
* If this function pointer is set to NULL, the power domain core will
* use a default implementation, which assumes #power-domain-cells =
* <1>, and that the DT cell contains a simple integer power domain ID.
*
* At present, the power domain API solely supports device-tree. If
* this changes, other xxx_xlate() functions may be added to support
* those other mechanisms.
*
* @power_domain: The power domain struct to hold the
* translation result.
* @args: The power domain specifier values from device
* tree.
* @return 0 if OK, or a negative error code.
*/
int (*of_xlate)(struct power_domain *power_domain,
struct ofnode_phandle_args *args);
/**
* request - Request a translated power domain.
*
* The power domain core calls this function as the second step in
* implementing a client's power_domain_get() call, following a
* successful xxx_xlate() call.
*
* @power_domain: The power domain to request; this has been
* filled in by a previous xxx_xlate() function
* call.
* @return 0 if OK, or a negative error code.
*/
int (*request)(struct power_domain *power_domain);
/**
* free - Free a previously requested power domain.
*
* This is the implementation of the client power_domain_free() API.
*
* @power_domain: The power domain to free.
* @return 0 if OK, or a negative error code.
*/
int (*free)(struct power_domain *power_domain);
/**
* on - Power on a power domain.
*
* @power_domain: The power domain to turn on.
* @return 0 if OK, or a negative error code.
*/
int (*on)(struct power_domain *power_domain);
/**
* off - Power off a power domain.
*
* @power_domain: The power domain to turn off.
* @return 0 if OK, or a negative error code.
*/
int (*off)(struct power_domain *power_domain);
};
#endif
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