u-boot/test/dm/simple-pm-bus.c
Sean Anderson 4a3390f1d3 dm: Add support for simple-pm-bus
This type of bus is used in Linux to designate buses which have power
domains and/or clocks which need to be enabled before their child devices
can be used. Because power domains are automatically enabled before probing
in U-Boot, we just need to enable any clocks present.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-07-01 15:01:21 +08:00

45 lines
1.4 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/test.h>
#include <dm/device-internal.h>
#include <test/ut.h>
#include <asm/clk.h>
#include <asm/power-domain.h>
/* These must match the ids in the device tree */
#define TEST_CLOCK_ID 4
#define TEST_POWER_ID 1
static int dm_test_simple_pm_bus(struct unit_test_state *uts)
{
struct udevice *power;
struct udevice *clock;
struct udevice *bus;
ut_assertok(uclass_get_device_by_name(UCLASS_POWER_DOMAIN,
"power-domain", &power));
ut_assertok(uclass_get_device_by_name(UCLASS_CLK, "clk-sbox",
&clock));
ut_asserteq(0, sandbox_power_domain_query(power, TEST_POWER_ID));
ut_asserteq(0, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
ut_assertok(uclass_get_device_by_name(UCLASS_SIMPLE_BUS, "pm-bus-test",
&bus));
ut_asserteq(1, sandbox_power_domain_query(power, TEST_POWER_ID));
ut_asserteq(1, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
ut_assertok(device_remove(bus, DM_REMOVE_NORMAL));
/* must re-probe since device_remove also removes the power domain */
ut_assertok(uclass_get_device_by_name(UCLASS_POWER_DOMAIN,
"power-domain", &power));
ut_asserteq(0, sandbox_power_domain_query(power, TEST_POWER_ID));
ut_asserteq(0, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
return 0;
}
DM_TEST(dm_test_simple_pm_bus, DM_TESTF_SCAN_FDT);