u-boot/arch/sandbox/include/asm/clk.h

/*
 * Copyright (c) 2016, NVIDIA CORPORATION.
 *
 * SPDX-License-Identifier: GPL-2.0
 */

#ifndef __SANDBOX_CLK_H
#define __SANDBOX_CLK_H

#include <common.h>

struct udevice;

/**
 * enum sandbox_clk_id - Identity of clocks implemented by the sandbox clock
 * provider.
 *
 * These IDs are within/relative-to the clock provider.
 */
enum sandbox_clk_id {
	SANDBOX_CLK_ID_SPI,
	SANDBOX_CLK_ID_I2C,

	SANDBOX_CLK_ID_COUNT,
};

/**
 * enum sandbox_clk_test_id - Identity of the clocks consumed by the sandbox
 * clock test device.
 *
 * These are the IDs the clock consumer knows the clocks as.
 */
enum sandbox_clk_test_id {
	SANDBOX_CLK_TEST_ID_FIXED,
	SANDBOX_CLK_TEST_ID_SPI,
	SANDBOX_CLK_TEST_ID_I2C,

	SANDBOX_CLK_TEST_ID_COUNT,
};

/**
 * sandbox_clk_query_rate - Query the current rate of a sandbox clock.
 *
 * @dev:	The sandbox clock provider device.
 * @id:		The clock to query.
 * @return:	The rate of the clock.
 */
ulong sandbox_clk_query_rate(struct udevice *dev, int id);
/**
 * sandbox_clk_query_enable - Query the enable state of a sandbox clock.
 *
 * @dev:	The sandbox clock provider device.
 * @id:		The clock to query.
 * @return:	The rate of the clock.
 */
int sandbox_clk_query_enable(struct udevice *dev, int id);

/**
 * sandbox_clk_test_get - Ask the sandbox clock test device to request its
 * clocks.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @return:	0 if OK, or a negative error code.
 */
int sandbox_clk_test_get(struct udevice *dev);
/**
 * sandbox_clk_test_get_rate - Ask the sandbox clock test device to query a
 * clock's rate.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @id:		The test device's clock ID to query.
 * @return:	The rate of the clock.
 */
ulong sandbox_clk_test_get_rate(struct udevice *dev, int id);
/**
 * sandbox_clk_test_set_rate - Ask the sandbox clock test device to set a
 * clock's rate.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @id:		The test device's clock ID to configure.
 * @return:	The new rate of the clock.
 */
ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate);
/**
 * sandbox_clk_test_enable - Ask the sandbox clock test device to enable a
 * clock.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @id:		The test device's clock ID to configure.
 * @return:	0 if OK, or a negative error code.
 */
int sandbox_clk_test_enable(struct udevice *dev, int id);
/**
 * sandbox_clk_test_disable - Ask the sandbox clock test device to disable a
 * clock.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @id:		The test device's clock ID to configure.
 * @return:	0 if OK, or a negative error code.
 */
int sandbox_clk_test_disable(struct udevice *dev, int id);
/**
 * sandbox_clk_test_free - Ask the sandbox clock test device to free its
 * clocks.
 *
 * @dev:	The sandbox clock test (client) devivce.
 * @return:	0 if OK, or a negative error code.
 */
int sandbox_clk_test_free(struct udevice *dev);

#endif