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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 | ||
c2f2e2c3 CW |
29 | #define LINEAR_RANGE(_min, _min_sel, _max_sel, _step) \ |
30 | { \ | |
31 | .min = _min, \ | |
32 | .min_sel = _min_sel, \ | |
33 | .max_sel = _max_sel, \ | |
34 | .step = _step, \ | |
35 | } | |
36 | ||
37 | #define LINEAR_RANGE_IDX(_idx, _min, _min_sel, _max_sel, _step) \ | |
38 | [_idx] = LINEAR_RANGE(_min, _min_sel, _max_sel, _step) | |
39 | ||
d2218d4e MV |
40 | unsigned int linear_range_values_in_range(const struct linear_range *r); |
41 | unsigned int linear_range_values_in_range_array(const struct linear_range *r, | |
42 | int ranges); | |
43 | unsigned int linear_range_get_max_value(const struct linear_range *r); | |
44 | ||
45 | int linear_range_get_value(const struct linear_range *r, unsigned int selector, | |
46 | unsigned int *val); | |
47 | int linear_range_get_value_array(const struct linear_range *r, int ranges, | |
48 | unsigned int selector, unsigned int *val); | |
49 | int linear_range_get_selector_low(const struct linear_range *r, | |
50 | unsigned int val, unsigned int *selector, | |
51 | bool *found); | |
52 | int linear_range_get_selector_high(const struct linear_range *r, | |
53 | unsigned int val, unsigned int *selector, | |
54 | bool *found); | |
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55 | void linear_range_get_selector_within(const struct linear_range *r, |
56 | unsigned int val, unsigned int *selector); | |
d2218d4e MV |
57 | int linear_range_get_selector_low_array(const struct linear_range *r, |
58 | int ranges, unsigned int val, | |
59 | unsigned int *selector, bool *found); | |
60 | ||
61 | #endif |