1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2020 ROHM Semiconductors */ 3 4 #ifndef LINEAR_RANGE_H 5 #define LINEAR_RANGE_H 6 7 #include <linux/types.h> 8 9 /** 10 * struct linear_range - table of selector - value pairs 11 * 12 * Define a lookup-table for range of values. Intended to help when looking 13 * for a register value matching certaing physical measure (like voltage). 14 * Usable when increment of one in register always results a constant increment 15 * of the physical measure (like voltage). 16 * 17 * @min: Lowest value in range 18 * @min_sel: Lowest selector for range 19 * @max_sel: Highest selector for range 20 * @step: Value step size 21 */ 22 struct linear_range { 23 unsigned int min; 24 unsigned int min_sel; 25 unsigned int max_sel; 26 unsigned int step; 27 }; 28 29 unsigned int linear_range_values_in_range(const struct linear_range *r); 30 unsigned int linear_range_values_in_range_array(const struct linear_range *r, 31 int ranges); 32 unsigned int linear_range_get_max_value(const struct linear_range *r); 33 34 int linear_range_get_value(const struct linear_range *r, unsigned int selector, 35 unsigned int *val); 36 int linear_range_get_value_array(const struct linear_range *r, int ranges, 37 unsigned int selector, unsigned int *val); 38 int linear_range_get_selector_low(const struct linear_range *r, 39 unsigned int val, unsigned int *selector, 40 bool *found); 41 int linear_range_get_selector_high(const struct linear_range *r, 42 unsigned int val, unsigned int *selector, 43 bool *found); 44 void linear_range_get_selector_within(const struct linear_range *r, 45 unsigned int val, unsigned int *selector); 46 int linear_range_get_selector_low_array(const struct linear_range *r, 47 int ranges, unsigned int val, 48 unsigned int *selector, bool *found); 49 50 #endif 51