From e96fa6c91177d0aa81119d1d24cc0aa2dd663581 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 10 Dec 2018 10:37:34 -0700 Subject: 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 --- test/dm/i2s.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 test/dm/i2s.c (limited to 'test/dm/i2s.c') diff --git a/test/dm/i2s.c b/test/dm/i2s.c new file mode 100644 index 0000000000..49ebc3523c --- /dev/null +++ b/test/dm/i2s.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 Google LLC + * Written by Simon Glass + */ + +#include +#include +#include +#include +#include +#include + +/* 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); -- cgit v1.2.3