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test: dm: regulator: Add regulator_set_value_clamp() tests

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Add a sandbox LDO3 with a configurable 1.8V to 3.3V range and use it
to test regulator_set_value_clamp().

Test in-range requests, clamping against the regulator limits, invalid
ranges outside the regulator limits and a min value higher than max.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Jonas Karlman
2026-07-12 16:18:32 +08:00
committed by Peng Fan
parent 0663b4f553
commit 10acd5bc9a
5 changed files with 65 additions and 8 deletions
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test/dm/regulator.c
+38
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@@ -28,6 +28,7 @@ enum {
BUCK3,
LDO1,
LDO2,
LDO3,
OUTPUT_COUNT,
};
@@ -44,6 +45,7 @@ static const char *regulator_names[OUTPUT_COUNT][OUTPUT_NAME_COUNT] = {
{ SANDBOX_BUCK3_DEVNAME, SANDBOX_BUCK3_PLATNAME },
{ SANDBOX_LDO1_DEVNAME, SANDBOX_LDO1_PLATNAME},
{ SANDBOX_LDO2_DEVNAME, SANDBOX_LDO2_PLATNAME},
{ SANDBOX_LDO3_DEVNAME, SANDBOX_LDO3_PLATNAME},
};
/* Test regulator get method */
@@ -118,6 +120,42 @@ static int dm_test_power_regulator_set_get_voltage(struct unit_test_state *uts)
}
DM_TEST(dm_test_power_regulator_set_get_voltage, UTF_SCAN_FDT);
/* Test regulator set Voltage clamp method */
static int dm_test_power_regulator_set_value_clamp(struct unit_test_state *uts)
{
struct udevice *dev;
const char *platname;
/* LDO3 have 'min' 1.8V and 'max' 3.3V */
platname = regulator_names[LDO3][PLATNAME];
ut_assertok(regulator_get_by_platname(platname, &dev));
/* 'target' in 'min'/'max' range - should not clamp voltage */
ut_assertok(regulator_set_value_clamp(dev, 1700000, 1800000, 1950000));
ut_asserteq(1800000, regulator_get_value(dev));
ut_assertok(regulator_set_value_clamp(dev, 2700000, 3300000, 3600000));
ut_asserteq(3300000, regulator_get_value(dev));
/* 'target' out of 'min'/'max' range - should clamp voltage */
ut_assertok(regulator_set_value_clamp(dev, 1700000, 1700000, 1950000));
ut_asserteq(1800000, regulator_get_value(dev));
ut_assertok(regulator_set_value_clamp(dev, 2700000, 3400000, 3600000));
ut_asserteq(3300000, regulator_get_value(dev));
/* 'min'/'max' out of range - should return -EINVAL */
ut_asserteq(-EINVAL,
regulator_set_value_clamp(dev, 1200000, 1500000, 1700000));
ut_asserteq(-EINVAL,
regulator_set_value_clamp(dev, 3500000, 4000000, 5000000));
/* 'min' higher than 'max' - should return -EINVAL */
ut_asserteq(-EINVAL,
regulator_set_value_clamp(dev, 3100000, 3000000, 2900000));
return 0;
}
DM_TEST(dm_test_power_regulator_set_value_clamp, UTF_SCAN_FDT);
/* Test regulator set and get Current method */
static int dm_test_power_regulator_set_get_current(struct unit_test_state *uts)
{