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Rather than returning various error codes, use assertions to check that the test passes. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Tom Rini <trini@konsulko.com> # rpi_3, rpi_4, rpi_arm64, am64x_evm_a53, am64-sk
106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <errno.h>
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#include <time.h>
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#include <linux/delay.h>
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#include <test/lib.h>
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#include <test/ut.h>
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static int test_get_timer(struct unit_test_state *uts)
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{
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ulong base, start, next, diff;
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int iter;
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base = get_timer(0);
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start = get_timer(0);
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for (iter = 0; iter < 10; iter++) {
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do {
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next = get_timer(0);
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} while (start == next);
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ut_asserteq(start + 1, next);
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start++;
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}
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/*
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* Check that get_timer(base) matches our elapsed time, allowing that
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* an extra millisecond may have passed.
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*/
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diff = get_timer(base);
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ut_assert(diff == iter || diff == iter + 1);
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return 0;
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}
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LIB_TEST(test_get_timer, 0);
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static int test_timer_get_us(struct unit_test_state *uts)
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{
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ulong prev, next, min = 1000000;
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long delta;
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int iter;
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/* Find the minimum delta we can measure, in microseconds */
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prev = timer_get_us();
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for (iter = 0; iter < 100; ) {
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next = timer_get_us();
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if (next != prev) {
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delta = next - prev;
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ut_assert(delta >= 0);
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if (delta) {
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if (delta < min)
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min = delta;
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prev = next;
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iter++;
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}
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}
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}
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ut_asserteq(1, min);
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return 0;
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}
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LIB_TEST(test_timer_get_us, 0);
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static int test_time_comparison(struct unit_test_state *uts)
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{
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ulong start_us, end_us, delta_us;
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long error;
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ulong start;
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start = get_timer(0);
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start_us = timer_get_us();
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while (get_timer(start) < 1000)
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;
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end_us = timer_get_us();
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delta_us = end_us - start_us;
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error = delta_us - 1000000;
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printf("%s: Microsecond time for 1 second: %lu, error = %ld\n",
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__func__, delta_us, error);
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ut_assert(abs(error) <= 1000);
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return 0;
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}
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LIB_TEST(test_time_comparison, 0);
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static int test_udelay(struct unit_test_state *uts)
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{
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long error;
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ulong start, delta;
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int iter;
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start = get_timer(0);
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for (iter = 0; iter < 1000; iter++)
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udelay(1000);
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delta = get_timer(start);
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error = delta - 1000;
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printf("%s: Delay time for 1000 udelay(1000): %lu ms, error = %ld\n",
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__func__, delta, error);
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ut_assert(abs(error) <= 100);
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return 0;
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}
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LIB_TEST(test_udelay, 0);
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