drivers/iio/test/iio-test-format.c

Source file repositories/reference/linux-study-clean/drivers/iio/test/iio-test-format.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/test/iio-test-format.c
Extension
.c
Size
8564 bytes
Lines
272
Domain
Driver Families
Bucket
drivers/iio
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/* Unit tests for IIO formatting functions
 *
 * Copyright (c) 2020 Lars-Peter Clausen <lars@metafoo.de>
 */

#include <kunit/test.h>
#include <linux/iio/iio.h>

#define IIO_TEST_FORMAT_EXPECT_EQ(_test, _buf, _ret, _val) do { \
		KUNIT_EXPECT_EQ(_test, strlen(_buf), _ret); \
		KUNIT_EXPECT_STREQ(_test, (_buf), (_val)); \
	} while (0)

static void iio_test_iio_format_value_integer(struct kunit *test)
{
	char *buf;
	int val;
	int ret;

	buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);

	val = 42;
	ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "42\n");

	val = -23;
	ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-23\n");

	val = 0;
	ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0\n");

	val = INT_MAX;
	ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "2147483647\n");

	val = INT_MIN;
	ret = iio_format_value(buf, IIO_VAL_INT, 1, &val);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-2147483648\n");
}

static void iio_test_iio_format_value_fixedpoint(struct kunit *test)
{
	int values[2];
	char *buf;
	int ret;

	buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);

	/* positive >= 1 */
	values[0] = 1;
	values[1] = 10;

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010 dB\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000000010\n");

	/* positive < 1 */
	values[0] = 0;
	values[1] = 12;

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012 dB\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000012\n");

	/* negative <= -1 */
	values[0] = -1;
	values[1] = 10;

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, ARRAY_SIZE(values), values);
	IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010 dB\n");

	ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, ARRAY_SIZE(values), values);

Annotation

Implementation Notes