716 lines
18 KiB
C
716 lines
18 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Kunit tests for IIO rescale conversions
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*
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* Copyright (c) 2021 Liam Beguin <liambeguin@gmail.com>
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*/
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#include <linux/gcd.h>
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#include <linux/overflow.h>
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#include <linux/iio/afe/rescale.h>
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#include <linux/iio/iio.h>
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#include <kunit/test.h>
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struct rescale_tc_data {
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const char *name;
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const s32 numerator;
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const s32 denominator;
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const s32 offset;
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const int schan_val;
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const int schan_val2;
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const int schan_off;
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const int schan_scale_type;
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const char *expected;
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const char *expected_off;
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};
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static const struct rescale_tc_data scale_cases[] = {
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/*
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* Typical use cases
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*/
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{
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.name = "typical IIO_VAL_INT, positive",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT,
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.schan_val = 42,
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.expected = "5210.918114143",
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},
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{
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.name = "typical IIO_VAL_INT, negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT,
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.schan_val = 42,
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.expected = "-5210.918114143",
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},
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{
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.name = "typical IIO_VAL_FRACTIONAL, positive",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 42,
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.schan_val2 = 20,
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.expected = "260.545905707",
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},
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{
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.name = "typical IIO_VAL_FRACTIONAL, negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 42,
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.schan_val2 = 20,
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.expected = "-260.545905707",
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},
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{
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.name = "typical IIO_VAL_FRACTIONAL_LOG2, positive",
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.numerator = 42,
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.denominator = 53,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 4096,
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.schan_val2 = 16,
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.expected = "0.049528301",
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},
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{
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.name = "typical IIO_VAL_FRACTIONAL_LOG2, negative",
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.numerator = -42,
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.denominator = 53,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 4096,
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.schan_val2 = 16,
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.expected = "-0.049528301",
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},
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{
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.name = "typical IIO_VAL_INT_PLUS_NANO, positive",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = 10,
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.schan_val2 = 123456,
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.expected = "1240.710106203",
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},
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{
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.name = "typical IIO_VAL_INT_PLUS_NANO, negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = 10,
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.schan_val2 = 123456,
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.expected = "-1240.710106203",
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},
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{
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.name = "typical IIO_VAL_INT_PLUS_MICRO, positive",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
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.schan_val = 10,
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.schan_val2 = 1234,
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.expected = "1240.84789",
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},
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{
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.name = "typical IIO_VAL_INT_PLUS_MICRO, negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
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.schan_val = 10,
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.schan_val2 = 1234,
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.expected = "-1240.84789",
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},
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/*
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* Use cases with small scales involving divisions
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*/
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{
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.name = "small IIO_VAL_FRACTIONAL, 261/509 scaled by 90/1373754273",
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.numerator = 261,
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.denominator = 509,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 90,
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.schan_val2 = 1373754273,
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.expected = "0.000000033594",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 90/1373754273 scaled by 261/509",
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.numerator = 90,
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.denominator = 1373754273,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 261,
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.schan_val2 = 509,
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.expected = "0.000000033594",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 760/1373754273 scaled by 427/2727",
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.numerator = 760,
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.denominator = 1373754273,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 427,
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.schan_val2 = 2727,
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.expected = "0.000000086626",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 761/1373754273 scaled by 427/2727",
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.numerator = 761,
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.denominator = 1373754273,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 427,
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.schan_val2 = 2727,
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.expected = "0.000000086740",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 5/32768 scaled by 3/10000",
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.numerator = 5,
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.denominator = 32768,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 3,
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.schan_val2 = 10000,
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.expected = "0.0000000457763671875",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 0 < scale < 1",
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.numerator = 6,
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.denominator = 6,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 1,
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.schan_val2 = 3,
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.expected = "0.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, -1 < scale < 0",
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.numerator = -6,
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.denominator = 6,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 1,
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.schan_val2 = 3,
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.expected = "-0.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, 0 < scale < 2",
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.numerator = 8,
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.denominator = 2,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 1,
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.schan_val2 = 3,
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.expected = "1.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL, -2 < scale < 0",
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.numerator = -8,
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.denominator = 2,
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.schan_scale_type = IIO_VAL_FRACTIONAL,
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.schan_val = 1,
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.schan_val2 = 3,
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.expected = "-1.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, 760/32768 scaled by 15/22",
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.numerator = 760,
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.denominator = 32768,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 15,
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.schan_val2 = 22,
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.expected = "0.000000082946",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, 761/32768 scaled by 15/22",
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.numerator = 761,
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.denominator = 32768,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 15,
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.schan_val2 = 22,
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.expected = "0.000000083055",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, 0 < scale < 1",
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.numerator = 16,
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.denominator = 3,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 1,
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.schan_val2 = 4,
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.expected = "0.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, -1 < scale < 0",
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.numerator = -16,
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.denominator = 3,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 1,
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.schan_val2 = 4,
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.expected = "-0.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, 0 < scale < 2",
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.numerator = 8,
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.denominator = 3,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 1,
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.schan_val2 = 1,
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.expected = "1.3333333333333333",
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},
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{
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.name = "small IIO_VAL_FRACTIONAL_LOG2, -2 < scale < 0",
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.numerator = -8,
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.denominator = 3,
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.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
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.schan_val = 1,
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.schan_val2 = 1,
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.expected = "-1.3333333333333333",
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},
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{
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.name = "small IIO_VAL_INT_PLUS_MICRO, positive",
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.numerator = 1,
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.denominator = 2,
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.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
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.schan_val = 5,
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.schan_val2 = 1234,
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.expected = "2.500617",
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},
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{
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.name = "small IIO_VAL_INT_PLUS_MICRO, negative",
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.numerator = -1,
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.denominator = 2,
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.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
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.schan_val = 5,
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.schan_val2 = 1234,
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.expected = "-2.500617",
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},
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/*
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* INT_PLUS_{MICRO,NANO} positive/negative corner cases
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*/
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{
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.name = "negative IIO_VAL_INT_PLUS_NANO, negative schan",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = -10,
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.schan_val2 = 123456,
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.expected = "-1240.710106203",
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},
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{
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.name = "negative IIO_VAL_INT_PLUS_NANO, both negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = -10,
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.schan_val2 = 123456,
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.expected = "1240.710106203",
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},
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{
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.name = "negative IIO_VAL_INT_PLUS_NANO, 3 negative",
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.numerator = -1000000,
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.denominator = -8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = -10,
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.schan_val2 = 123456,
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.expected = "-1240.710106203",
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},
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{
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.name = "negative IIO_VAL_INT_PLUS_NANO, 4 negative",
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.numerator = -1000000,
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.denominator = -8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = -10,
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.schan_val2 = -123456,
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.expected = "-1240.710106203",
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},
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{
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.name = "negative IIO_VAL_INT_PLUS_NANO, negative, *val = 0",
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.numerator = 1,
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.denominator = -10,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = 0,
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.schan_val2 = 123456789,
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.expected = "-0.012345678",
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},
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/*
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* INT_PLUS_{MICRO,NANO} decimal part overflow
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*/
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{
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.name = "decimal overflow IIO_VAL_INT_PLUS_NANO, positive",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = 10,
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.schan_val2 = 123456789,
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.expected = "1256.01200856",
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},
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{
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.name = "decimal overflow IIO_VAL_INT_PLUS_NANO, negative",
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.numerator = -1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
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.schan_val = 10,
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.schan_val2 = 123456789,
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.expected = "-1256.01200856",
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},
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{
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.name = "decimal overflow IIO_VAL_INT_PLUS_NANO, negative schan",
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.numerator = 1000000,
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.denominator = 8060,
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.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = -10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.expected = "-1256.01200856",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "decimal overflow IIO_VAL_INT_PLUS_MICRO, positive",
|
||
|
|
.numerator = 1000000,
|
||
|
|
.denominator = 8060,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.expected = "16557.914267",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "decimal overflow IIO_VAL_INT_PLUS_MICRO, negative",
|
||
|
|
.numerator = -1000000,
|
||
|
|
.denominator = 8060,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.expected = "-16557.914267",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "decimal overflow IIO_VAL_INT_PLUS_MICRO, negative schan",
|
||
|
|
.numerator = 1000000,
|
||
|
|
.denominator = 8060,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = -10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.expected = "-16557.914267",
|
||
|
|
},
|
||
|
|
/*
|
||
|
|
* 32-bit overflow conditions
|
||
|
|
*/
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_FRACTIONAL, positive",
|
||
|
|
.numerator = 2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL,
|
||
|
|
.schan_val = S32_MAX,
|
||
|
|
.schan_val2 = 1,
|
||
|
|
.expected = "214748364.7",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_FRACTIONAL, negative",
|
||
|
|
.numerator = -2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL,
|
||
|
|
.schan_val = S32_MAX,
|
||
|
|
.schan_val2 = 1,
|
||
|
|
.expected = "-214748364.7",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_FRACTIONAL_LOG2, positive",
|
||
|
|
.numerator = S32_MAX,
|
||
|
|
.denominator = 4096,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
|
||
|
|
.schan_val = 4096,
|
||
|
|
.schan_val2 = 16,
|
||
|
|
.expected = "32767.99998474121",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_FRACTIONAL_LOG2, negative",
|
||
|
|
.numerator = S32_MAX,
|
||
|
|
.denominator = 4096,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
|
||
|
|
.schan_val = -4096,
|
||
|
|
.schan_val2 = 16,
|
||
|
|
.expected = "-32767.99998474121",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_NANO, positive",
|
||
|
|
.numerator = 2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "1.214748364",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_NANO, negative",
|
||
|
|
.numerator = -2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "-1.214748364",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_NANO, negative schan",
|
||
|
|
.numerator = 2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = -10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "-1.214748364",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_MICRO, positive",
|
||
|
|
.numerator = 2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "215.748364",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_MICRO, negative",
|
||
|
|
.numerator = -2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "-215.748364",
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "overflow IIO_VAL_INT_PLUS_MICRO, negative schan",
|
||
|
|
.numerator = 2,
|
||
|
|
.denominator = 20,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = -10,
|
||
|
|
.schan_val2 = S32_MAX,
|
||
|
|
.expected = "-215.748364",
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct rescale_tc_data offset_cases[] = {
|
||
|
|
/*
|
||
|
|
* Typical use cases
|
||
|
|
*/
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT, positive",
|
||
|
|
.offset = 1234,
|
||
|
|
.schan_scale_type = IIO_VAL_INT,
|
||
|
|
.schan_val = 123,
|
||
|
|
.schan_val2 = 0,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "24", /* 23.872 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT, negative",
|
||
|
|
.offset = -1234,
|
||
|
|
.schan_scale_type = IIO_VAL_INT,
|
||
|
|
.schan_val = 12,
|
||
|
|
.schan_val2 = 0,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "-88", /* -88.83333333333333 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_FRACTIONAL, positive",
|
||
|
|
.offset = 1234,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL,
|
||
|
|
.schan_val = 12,
|
||
|
|
.schan_val2 = 34,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "3510", /* 3510.333333333333 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_FRACTIONAL, negative",
|
||
|
|
.offset = -1234,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL,
|
||
|
|
.schan_val = 12,
|
||
|
|
.schan_val2 = 34,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "-3482", /* -3482.333333333333 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_FRACTIONAL_LOG2, positive",
|
||
|
|
.offset = 1234,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
|
||
|
|
.schan_val = 12,
|
||
|
|
.schan_val2 = 16,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "6739299", /* 6739299.333333333 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_FRACTIONAL_LOG2, negative",
|
||
|
|
.offset = -1234,
|
||
|
|
.schan_scale_type = IIO_VAL_FRACTIONAL_LOG2,
|
||
|
|
.schan_val = 12,
|
||
|
|
.schan_val2 = 16,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "-6739271", /* -6739271.333333333 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT_PLUS_NANO, positive",
|
||
|
|
.offset = 1234,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "135", /* 135.8951219647469 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT_PLUS_NANO, negative",
|
||
|
|
.offset = -1234,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_NANO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "-107", /* -107.89512196474689 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT_PLUS_MICRO, positive",
|
||
|
|
.offset = 1234,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "23", /* 23.246438560723952 */
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "typical IIO_VAL_INT_PLUS_MICRO, negative",
|
||
|
|
.offset = -12345,
|
||
|
|
.schan_scale_type = IIO_VAL_INT_PLUS_MICRO,
|
||
|
|
.schan_val = 10,
|
||
|
|
.schan_val2 = 123456789,
|
||
|
|
.schan_off = 14,
|
||
|
|
.expected_off = "-78", /* -78.50185091745313 */
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static void case_to_desc(const struct rescale_tc_data *t, char *desc)
|
||
|
|
{
|
||
|
|
strcpy(desc, t->name);
|
||
|
|
}
|
||
|
|
|
||
|
|
KUNIT_ARRAY_PARAM(iio_rescale_scale, scale_cases, case_to_desc);
|
||
|
|
KUNIT_ARRAY_PARAM(iio_rescale_offset, offset_cases, case_to_desc);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* iio_str_to_nano() - Parse a fixed-point string to get an
|
||
|
|
* IIO_VAL_INT_PLUS_NANO value
|
||
|
|
* @str: The string to parse
|
||
|
|
* @nano: The number as an integer
|
||
|
|
*
|
||
|
|
* Returns 0 on success, or a negative error code if the string cound not be
|
||
|
|
* parsed.
|
||
|
|
*/
|
||
|
|
static int iio_str_to_nano(const char *str, s64 *nano)
|
||
|
|
{
|
||
|
|
int tmp, tmp2;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* iio_str_to_fixpoint() uses 10^8 here instead of 10^9 as fract_mult is
|
||
|
|
* the multiplier for the first decimal place.
|
||
|
|
*/
|
||
|
|
ret = iio_str_to_fixpoint(str, 100000000, &tmp, &tmp2);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (tmp < 0)
|
||
|
|
tmp2 *= -1;
|
||
|
|
|
||
|
|
*nano = (s64)tmp * 1000000000UL + tmp2;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* iio_test_relative_error_ppm() - Compute relative error (in parts-per-million)
|
||
|
|
* between two fixed-point strings
|
||
|
|
* @real_str: The real value as a string
|
||
|
|
* @exp_str: The expected value as a string
|
||
|
|
*
|
||
|
|
* Returns a negative error code if the strings cound not be parsed, or the
|
||
|
|
* relative error in parts-per-million.
|
||
|
|
*/
|
||
|
|
static int iio_test_relative_error_ppm(const char *real_str, const char *exp_str)
|
||
|
|
{
|
||
|
|
s64 real, exp, err;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = iio_str_to_nano(real_str, &real);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = iio_str_to_nano(exp_str, &exp);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (!exp) {
|
||
|
|
pr_err("Expected value is null, relative error is undefined\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = 1000000UL * abs(exp - real);
|
||
|
|
|
||
|
|
return (int)div64_u64(err, abs(exp));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void iio_rescale_test_scale(struct kunit *test)
|
||
|
|
{
|
||
|
|
struct rescale_tc_data *t = (struct rescale_tc_data *)test->param_value;
|
||
|
|
char *buff = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
|
||
|
|
struct rescale rescale;
|
||
|
|
int values[2];
|
||
|
|
int rel_ppm;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
rescale.numerator = t->numerator;
|
||
|
|
rescale.denominator = t->denominator;
|
||
|
|
rescale.offset = t->offset;
|
||
|
|
values[0] = t->schan_val;
|
||
|
|
values[1] = t->schan_val2;
|
||
|
|
|
||
|
|
ret = rescale_process_scale(&rescale, t->schan_scale_type,
|
||
|
|
&values[0], &values[1]);
|
||
|
|
|
||
|
|
ret = iio_format_value(buff, ret, 2, values);
|
||
|
|
KUNIT_EXPECT_EQ(test, (int)strlen(buff), ret);
|
||
|
|
|
||
|
|
rel_ppm = iio_test_relative_error_ppm(buff, t->expected);
|
||
|
|
KUNIT_EXPECT_GE_MSG(test, rel_ppm, 0, "failed to compute ppm\n");
|
||
|
|
|
||
|
|
KUNIT_EXPECT_EQ_MSG(test, rel_ppm, 0,
|
||
|
|
"\t real=%s"
|
||
|
|
"\texpected=%s\n",
|
||
|
|
buff, t->expected);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void iio_rescale_test_offset(struct kunit *test)
|
||
|
|
{
|
||
|
|
struct rescale_tc_data *t = (struct rescale_tc_data *)test->param_value;
|
||
|
|
char *buff_off = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
|
||
|
|
struct rescale rescale;
|
||
|
|
int values[2];
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
rescale.numerator = t->numerator;
|
||
|
|
rescale.denominator = t->denominator;
|
||
|
|
rescale.offset = t->offset;
|
||
|
|
values[0] = t->schan_val;
|
||
|
|
values[1] = t->schan_val2;
|
||
|
|
|
||
|
|
ret = rescale_process_offset(&rescale, t->schan_scale_type,
|
||
|
|
t->schan_val, t->schan_val2, t->schan_off,
|
||
|
|
&values[0], &values[1]);
|
||
|
|
|
||
|
|
ret = iio_format_value(buff_off, ret, 2, values);
|
||
|
|
KUNIT_EXPECT_EQ(test, (int)strlen(buff_off), ret);
|
||
|
|
|
||
|
|
KUNIT_EXPECT_STREQ(test, strim(buff_off), t->expected_off);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct kunit_case iio_rescale_test_cases[] = {
|
||
|
|
KUNIT_CASE_PARAM(iio_rescale_test_scale, iio_rescale_scale_gen_params),
|
||
|
|
KUNIT_CASE_PARAM(iio_rescale_test_offset, iio_rescale_offset_gen_params),
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct kunit_suite iio_rescale_test_suite = {
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.name = "iio-rescale",
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.test_cases = iio_rescale_test_cases,
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};
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kunit_test_suite(iio_rescale_test_suite);
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MODULE_AUTHOR("Liam Beguin <liambeguin@gmail.com>");
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MODULE_DESCRIPTION("Test IIO rescale conversion functions");
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MODULE_LICENSE("GPL v2");
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MODULE_IMPORT_NS(IIO_RESCALE);
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