4a3390f1d3
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>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/test.h>
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#include <dm/device-internal.h>
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#include <test/ut.h>
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#include <asm/clk.h>
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#include <asm/power-domain.h>
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/* These must match the ids in the device tree */
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#define TEST_CLOCK_ID 4
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#define TEST_POWER_ID 1
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static int dm_test_simple_pm_bus(struct unit_test_state *uts)
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{
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struct udevice *power;
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struct udevice *clock;
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struct udevice *bus;
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ut_assertok(uclass_get_device_by_name(UCLASS_POWER_DOMAIN,
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"power-domain", &power));
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ut_assertok(uclass_get_device_by_name(UCLASS_CLK, "clk-sbox",
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&clock));
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ut_asserteq(0, sandbox_power_domain_query(power, TEST_POWER_ID));
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ut_asserteq(0, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
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ut_assertok(uclass_get_device_by_name(UCLASS_SIMPLE_BUS, "pm-bus-test",
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&bus));
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ut_asserteq(1, sandbox_power_domain_query(power, TEST_POWER_ID));
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ut_asserteq(1, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
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ut_assertok(device_remove(bus, DM_REMOVE_NORMAL));
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/* must re-probe since device_remove also removes the power domain */
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ut_assertok(uclass_get_device_by_name(UCLASS_POWER_DOMAIN,
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"power-domain", &power));
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ut_asserteq(0, sandbox_power_domain_query(power, TEST_POWER_ID));
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ut_asserteq(0, sandbox_clk_query_enable(clock, TEST_CLOCK_ID));
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return 0;
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}
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DM_TEST(dm_test_simple_pm_bus, DM_TESTF_SCAN_FDT);
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