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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2026 Free Mobile - Vincent Jardin
*
* Unit tests for the PMBus 1.x framework, the generic
* PMBus regulator and the pmbus CLI command.
*/
#include <dm.h>
#include <i2c.h>
#include <pmbus.h>
#include <dm/test.h>
#include <test/test.h>
#include <test/ut.h>
/* The line pmbus dev prints when a chip is selected */
#define PMBUS_ACTIVE_LINE \
"pmbus: active i2c0:0x70 rail=\"sandbox-pmbus-vout\" " \
"MFR_ID=\"SANDBOX\" MODEL=\"PMBUS-EMUL\" vendor=(generic)"
/* The line pmbus list prints for the bound chip */
#define PMBUS_LIST_LINE \
" i2c0:0x70 rail=\"sandbox-pmbus-vout\" node=pmbus@70 " \
"driver=pmbus_generic_regulator"
/* Select the emulated chip and check the resulting banner line */
static int pmbus_select(struct unit_test_state *uts)
{
ut_assertok(run_command("pmbus dev 0:70", 0));
ut_assert_nextline(PMBUS_ACTIVE_LINE);
return 0;
}
/* The chip is reachable via UCLASS_REGULATOR (compatible = "pmbus") */
static int dm_test_pmbus_bind(struct unit_test_state *uts)
{
struct udevice *dev;
ut_assertok(uclass_get_device_by_name(UCLASS_REGULATOR, "pmbus@70",
&dev));
ut_asserteq_str("pmbus_generic_regulator", dev->driver->name);
ut_asserteq(UCLASS_I2C, device_get_uclass_id(dev_get_parent(dev)));
return 0;
}
DM_TEST(dm_test_pmbus_bind, UTF_SCAN_FDT);
/* pmbus dev by <bus>:<addr> and by regulator-name select the chip */
static int dm_test_pmbus_dev(struct unit_test_state *uts)
{
ut_assertok(run_command("pmbus dev 0:70", 0));
ut_assert_nextline(PMBUS_ACTIVE_LINE);
ut_assert_console_end();
/* Selecting by DT regulator-name resolves to the same chip */
ut_assertok(run_command("pmbus dev sandbox-pmbus-vout", 0));
ut_assert_nextline(PMBUS_ACTIVE_LINE);
ut_assert_console_end();
/* pmbus dev with no argument reprints the active chip */
ut_assertok(run_command("pmbus dev", 0));
ut_assert_nextline(PMBUS_ACTIVE_LINE);
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_dev, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus list enumerates the bound chip among the UCLASS_REGULATOR devices */
static int dm_test_pmbus_list(struct unit_test_state *uts)
{
ut_assertok(run_command("pmbus list", 0));
ut_assert_skip_to_line(PMBUS_LIST_LINE);
return 0;
}
DM_TEST(dm_test_pmbus_list, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus info decodes identification + the detected driver_info */
static int dm_test_pmbus_info(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus info", 0));
ut_assert_nextline("pmbus device i2c0:0x70");
ut_assert_nextline(" regulator-name: \"sandbox-pmbus-vout\"");
ut_assert_nextline(" MFR_ID : \"SANDBOX\"");
ut_assert_nextline(" MFR_MODEL : \"PMBUS-EMUL\"");
ut_assert_nextline(" MFR_REVISION : \"1.0\" raw=0x312e30");
ut_assert_nextline(" PMBUS_REVISION: 0x33 (PMBus 1.3)");
ut_assert_nextline(" vendor : (none)");
ut_assert_nextline(" driver_info : pages=1");
ut_assert_nextline(" [VOLTAGE_IN ] format=LINEAR");
ut_assert_nextline(" [VOLTAGE_OUT ] format=LINEAR");
ut_assert_nextline(" [CURRENT_IN ] format=LINEAR");
ut_assert_nextline(" [CURRENT_OUT ] format=LINEAR");
ut_assert_nextline(" [POWER ] format=LINEAR");
ut_assert_nextline(" [TEMPERATURE ] format=LINEAR");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_info, UTF_SCAN_FDT | UTF_CONSOLE);
/*
* pmbus telemetry decodes the implemented sensors and prints
* "(not supported)" for the commands the emulator NAKs (READ_IIN,
* READ_POUT). LINEAR11 is used for VIN/IOUT/TEMP, LINEAR16 (with the
* VOUT_MODE 2^-8 exponent) for VOUT.
*/
static int dm_test_pmbus_telemetry(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus telemetry", 0));
ut_assert_nextline("pmbus telemetry @ i2c0:0x70");
ut_assert_nextline(" VIN : raw=0x0abc 1400.000V");
ut_assert_nextline(" VOUT : raw=0x0200 2.000V");
ut_assert_nextline(" IIN : (not supported)");
ut_assert_nextline(" IOUT : raw=0x0123 291.000A");
ut_assert_nextline(" POUT : (not supported)");
ut_assert_nextline(" TEMP : raw=0x0019 25.000C");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_telemetry, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus status decodes every STATUS_* register; the emulator is clean */
static int dm_test_pmbus_status(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus status", 0));
ut_assert_nextline("pmbus status @ i2c0:0x70");
ut_assert_nextline(" STATUS_WORD (79h) = 0x0000 [clean]");
ut_assert_nextline(" STATUS_VOUT (7Ah) = 0x00 [clean]");
ut_assert_nextline(" STATUS_IOUT (7Bh) = 0x00 [clean]");
ut_assert_nextline(" STATUS_INPUT (7Ch) = 0x00 [clean]");
ut_assert_nextline(" STATUS_TEMP (7Dh) = 0x00 [clean]");
ut_assert_nextline(" STATUS_CML (7Eh) = 0x00 [clean]");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_status, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus read/pmbus write raw register access (byte, word, string) */
static int dm_test_pmbus_read_write(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
/* Symbolic and numeric register names both resolve */
ut_assertok(run_command("pmbus read VOUT_MODE", 0));
ut_assert_nextline(" 20h VOUT_MODE b=0x18");
ut_assertok(run_command("pmbus read 8b w", 0));
ut_assert_nextline(" 8bh READ_VOUT w=0x0200");
ut_assertok(run_command("pmbus read MFR_ID s", 0));
ut_assert_nextline(" 99h MFR_ID s=\"SANDBOX\"");
/* A word write is observable on the next read-back */
ut_assertok(run_command("pmbus write VOUT_COMMAND 123 w", 0));
ut_assert_nextline("pmbus: wrote 0x123 to 21h (VOUT_COMMAND)");
ut_assertok(run_command("pmbus read VOUT_COMMAND w", 0));
ut_assert_nextline(" 21h VOUT_COMMAND w=0x0123");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_read_write, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus vout reads back VOUT via the active driver_info decoder */
static int dm_test_pmbus_vout(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus vout", 0));
ut_assert_nextline("pmbus VOUT @ i2c0:0x70 raw=0x0200 2.000V");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_vout, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus dump walks every standard register; spot-check one line */
static int dm_test_pmbus_dump(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus dump", 0));
ut_assert_nextline("pmbus dump @ i2c0:0x70 (registers known to <pmbus.h>)");
ut_assert_skip_to_line(" 20h VOUT_MODE b=0x18");
return 0;
}
DM_TEST(dm_test_pmbus_dump, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus clear [faults] issues CLEAR_FAULTS (03h) */
static int dm_test_pmbus_clear(struct unit_test_state *uts)
{
ut_assertok(pmbus_select(uts));
ut_assertok(run_command("pmbus clear faults", 0));
ut_assert_nextline("pmbus: CLEAR_FAULTS (03h) issued (RAM sticky STATUS_* cleared)");
ut_assert_console_end();
return 0;
}
DM_TEST(dm_test_pmbus_clear, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus scan finds the emulated chip by its MFR_ID block read */
static int dm_test_pmbus_scan(struct unit_test_state *uts)
{
ut_assertok(run_command("pmbus scan 0", 0));
ut_assert_skip_to_line(" i2c0:0x70 MFR_ID=\"SANDBOX\"");
return 0;
}
DM_TEST(dm_test_pmbus_scan, UTF_SCAN_FDT | UTF_CONSOLE);
/* pmbus help lists vendor extensions; none are registered here */
static int dm_test_pmbus_help(struct unit_test_state *uts)
{
ut_assertok(run_command("pmbus help", 0));
ut_assert_nextline("pmbus: no vendor extensions registered.");
ut_assert_skip_to_line(" board hook (boot snapshot) and re run 'pmbus help'.");
return 0;
}
DM_TEST(dm_test_pmbus_help, UTF_SCAN_FDT | UTF_CONSOLE);
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