u-boot/test/dm/i2s.c
Simon Glass e96fa6c911 dm: sound: Create a uclass for i2s
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>
2018-12-13 16:32:49 -07:00

32 lines
756 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2018 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <i2s.h>
#include <dm/test.h>
#include <test/ut.h>
#include <asm/test.h>
/* Basic test of the i2s codec uclass */
static int dm_test_i2s(struct unit_test_state *uts)
{
struct udevice *dev;
u8 data[3];
/* check probe success */
ut_assertok(uclass_first_device_err(UCLASS_I2S, &dev));
data[0] = 1;
data[1] = 4;
data[2] = 6;
ut_assertok(i2s_tx_data(dev, data, ARRAY_SIZE(data)));
ut_asserteq(11, sandbox_get_i2s_sum(dev));
ut_assertok(i2s_tx_data(dev, data, 1));
ut_asserteq(12, sandbox_get_i2s_sum(dev));
return 0;
}
DM_TEST(dm_test_i2s, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);