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The i2s bus is commonly used with audio codecs. It provides a way to stream digital data sychronously in both directions. U-Boot only supports audio output, so this uclass is very simple, with a single tx_data() method. Add a uclass and a test for i2s. Signed-off-by: Simon Glass <sjg@chromium.org>
33 lines
756 B
C
33 lines
756 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <i2s.h>
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#include <dm/test.h>
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#include <test/ut.h>
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#include <asm/test.h>
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/* Basic test of the i2s codec uclass */
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static int dm_test_i2s(struct unit_test_state *uts)
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{
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struct udevice *dev;
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u8 data[3];
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/* check probe success */
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ut_assertok(uclass_first_device_err(UCLASS_I2S, &dev));
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data[0] = 1;
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data[1] = 4;
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data[2] = 6;
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ut_assertok(i2s_tx_data(dev, data, ARRAY_SIZE(data)));
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ut_asserteq(11, sandbox_get_i2s_sum(dev));
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ut_assertok(i2s_tx_data(dev, data, 1));
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ut_asserteq(12, sandbox_get_i2s_sum(dev));
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return 0;
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}
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DM_TEST(dm_test_i2s, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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