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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2020 ROHM Semiconductors */
#ifndef LINEAR_RANGE_H
#define LINEAR_RANGE_H
#include <linux/types.h>
/**
* struct linear_range - table of selector - value pairs
*
* Define a lookup-table for range of values. Intended to help when looking
* for a register value matching certaing physical measure (like voltage).
* Usable when increment of one in register always results a constant increment
* of the physical measure (like voltage).
*
* @min: Lowest value in range
* @min_sel: Lowest selector for range
* @max_sel: Highest selector for range
* @step: Value step size
*/
struct linear_range {
unsigned int min;
unsigned int min_sel;
unsigned int max_sel;
unsigned int step;
};
#define LINEAR_RANGE(_min, _min_sel, _max_sel, _step) \
{ \
.min = _min, \
.min_sel = _min_sel, \
.max_sel = _max_sel, \
.step = _step, \
}
#define LINEAR_RANGE_IDX(_idx, _min, _min_sel, _max_sel, _step) \
[_idx] = LINEAR_RANGE(_min, _min_sel, _max_sel, _step)
unsigned int linear_range_values_in_range(const struct linear_range *r);
unsigned int linear_range_values_in_range_array(const struct linear_range *r,
int ranges);
unsigned int linear_range_get_max_value(const struct linear_range *r);
int linear_range_get_value(const struct linear_range *r, unsigned int selector,
unsigned int *val);
int linear_range_get_value_array(const struct linear_range *r, int ranges,
unsigned int selector, unsigned int *val);
int linear_range_get_selector_low(const struct linear_range *r,
unsigned int val, unsigned int *selector,
bool *found);
int linear_range_get_selector_high(const struct linear_range *r,
unsigned int val, unsigned int *selector,
bool *found);
void linear_range_get_selector_within(const struct linear_range *r,
unsigned int val, unsigned int *selector);
int linear_range_get_selector_low_array(const struct linear_range *r,
int ranges, unsigned int val,
unsigned int *selector, bool *found);
#endif