1 /* Copyright 2021 Google LLC
2 * SPDX-License-Identifier: Apache-2.0
3 */
4
5 #include <zephyr/device.h>
6 #include <zephyr/devicetree.h>
7 #include <zephyr/drivers/syscon.h>
8 #include <zephyr/ztest.h>
9 #include <zephyr/linker/devicetree_regions.h>
10
11 #define RES_SECT LINKER_DT_NODE_REGION_NAME(DT_NODELABEL(res))
12
13 uint8_t var_in_res0[DT_REG_SIZE(DT_NODELABEL(syscon))] __attribute((__section__(RES_SECT)));
14
ZTEST(syscon,test_size)15 ZTEST(syscon, test_size)
16 {
17 const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(syscon));
18 const size_t expected_size = DT_REG_SIZE(DT_NODELABEL(syscon));
19 size_t size;
20
21 zassert_not_null(dev, NULL);
22 zassert_ok(syscon_get_size(dev, &size));
23 zassert_equal(size, expected_size, "size(0x%x) != expected_size(0x%x)", size,
24 expected_size);
25 }
26
ZTEST(syscon,test_out_of_bounds)27 ZTEST(syscon, test_out_of_bounds)
28 {
29 const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(syscon));
30 uint32_t val;
31
32 zassert_equal(syscon_read_reg(dev, DT_REG_SIZE(DT_NODELABEL(syscon)), &val), -EINVAL);
33 zassert_equal(syscon_write_reg(dev, DT_REG_SIZE(DT_NODELABEL(syscon)), val), -EINVAL);
34 }
35
ZTEST(syscon,test_read)36 ZTEST(syscon, test_read)
37 {
38 const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(syscon));
39 uintptr_t base_addr;
40 uint32_t val;
41
42 zassert_ok(syscon_get_base(dev, &base_addr));
43 for (size_t i = 0; i < ARRAY_SIZE(var_in_res0); ++i) {
44 ((uint8_t *)base_addr)[i] = i;
45 zassert_ok(syscon_read_reg(dev, i, &val));
46 zassert_equal(i, val);
47 }
48 }
49
ZTEST(syscon,test_write)50 ZTEST(syscon, test_write)
51 {
52 const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(syscon));
53 uintptr_t base_addr;
54
55 zassert_ok(syscon_get_base(dev, &base_addr));
56 for (uint32_t i = 0; i < ARRAY_SIZE(var_in_res0); ++i) {
57 zassert_ok(syscon_write_reg(dev, i, i));
58 zassert_equal(((uint8_t *)base_addr)[i], i);
59 }
60 }
61
62 ZTEST_SUITE(syscon, NULL, NULL, NULL, NULL, NULL);
63
