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https://github.com/AsahiLinux/u-boot
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038b13ee81
This patch adds a generic reset driver. It is designed to be useful when one has a register in a regmap which contains bits that reset other devices. I thought this seemed like a very generic use, so here is a generic driver. The overall structure has been modeled on the syscon-reboot driver. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
59 lines
1.7 KiB
C
59 lines
1.7 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 <regmap.h>
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#include <reset.h>
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#include <syscon.h>
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#include <test/ut.h>
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#include <asm/test.h>
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#include <linux/bitops.h>
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/* The following values must match the device tree */
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#define TEST_RESET_REG 1
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#define TEST_RESET_ASSERT_HIGH 0
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#define TEST_RESET_ASSERT (TEST_RESET_ASSERT_HIGH ? (u32)-1 : (u32)0)
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#define TEST_RESET_DEASSERT (~TEST_RESET_ASSERT)
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#define TEST_RESET_VALID 15
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#define TEST_RESET_NOMASK 30
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#define TEST_RESET_OUTOFRANGE 60
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static int dm_test_syscon_reset(struct unit_test_state *uts)
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{
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struct regmap *map;
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struct reset_ctl rst;
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struct udevice *reset;
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struct udevice *syscon;
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struct udevice *syscon_reset;
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uint reg;
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ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "syscon-reset-test",
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&reset));
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ut_assertok(uclass_get_device_by_name(UCLASS_SYSCON, "syscon@0",
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&syscon));
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ut_assertok(uclass_get_device_by_name(UCLASS_RESET, "syscon-reset",
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&syscon_reset));
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ut_assertok_ptr((map = syscon_get_regmap(syscon)));
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ut_asserteq(-EINVAL, reset_get_by_name(reset, "no_mask", &rst));
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ut_asserteq(-EINVAL, reset_get_by_name(reset, "out_of_range", &rst));
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ut_assertok(reset_get_by_name(reset, "valid", &rst));
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sandbox_set_enable_memio(true);
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ut_assertok(regmap_write(map, TEST_RESET_REG, TEST_RESET_DEASSERT));
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ut_assertok(reset_assert(&rst));
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ut_assertok(regmap_read(map, TEST_RESET_REG, ®));
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ut_asserteq(TEST_RESET_DEASSERT ^ BIT(TEST_RESET_VALID), reg);
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ut_assertok(reset_deassert(&rst));
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ut_assertok(regmap_read(map, TEST_RESET_REG, ®));
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ut_asserteq(TEST_RESET_DEASSERT, reg);
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return 0;
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}
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DM_TEST(dm_test_syscon_reset, DM_TESTF_SCAN_FDT);
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