u-boot/arch/sandbox/include/asm/clk.h
Dario Binacchi 2983ad55a1 clk: add clk_round_rate()
It returns the rate which will be set if you ask clk_set_rate() to set
that rate. It provides a way to query exactly what rate you'll get if
you call clk_set_rate() with that same argument.
So essentially, clk_round_rate() and clk_set_rate() are equivalent
except the former does not modify the clock hardware in any way.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
2021-01-12 10:58:04 +05:30

193 lines
5.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*/
#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_UART1,
SANDBOX_CLK_ID_UART2,
SANDBOX_CLK_ID_BUS,
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_DEVM1,
SANDBOX_CLK_TEST_ID_DEVM2,
SANDBOX_CLK_TEST_ID_DEVM_NULL,
SANDBOX_CLK_TEST_ID_COUNT,
};
#define SANDBOX_CLK_TEST_NON_DEVM_COUNT SANDBOX_CLK_TEST_ID_DEVM1
/**
* 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_query_requested - Query the requested 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_requested(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_devm_get - Ask the sandbox clock test device to request its
* clocks using the managed API.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_devm_get(struct udevice *dev);
/**
* sandbox_clk_test_get_bulk - Ask the sandbox clock test device to request its
* clocks with the bulk clk API.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_get_bulk(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_round_rate - Ask the sandbox clock test device to round a
* clock's rate.
*
* @dev: The sandbox clock test (client) device.
* @id: The test device's clock ID to configure.
* @return: The rounded rate of the clock.
*/
ulong sandbox_clk_test_round_rate(struct udevice *dev, int id, ulong rate);
/**
* 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_enable_bulk - Ask the sandbox clock test device to enable
* all clocks in it's clock bulk struct.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_enable_bulk(struct udevice *dev);
/**
* 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_disable_bulk - Ask the sandbox clock test device to disable
* all clocks in it's clock bulk struct.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_disable_bulk(struct udevice *dev);
/**
* 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);
/**
* sandbox_clk_test_release_bulk - Ask the sandbox clock test device to release
* all clocks in it's clock bulk struct.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_release_bulk(struct udevice *dev);
/**
* sandbox_clk_test_valid - Ask the sandbox clock test device to check its
* clocks are valid.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
int sandbox_clk_test_valid(struct udevice *dev);
/**
* sandbox_clk_test_valid - Ask the sandbox clock test device to check its
* clocks are valid.
*
* @dev: The sandbox clock test (client) devivce.
* @return: 0 if OK, or a negative error code.
*/
struct clk *sandbox_clk_test_get_devm_clk(struct udevice *dev, int id);
#endif