u-boot/drivers/sound/i2s-uclass.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

25 lines
490 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>
int i2s_tx_data(struct udevice *dev, void *data, uint data_size)
{
struct i2s_ops *ops = i2s_get_ops(dev);
if (!ops->tx_data)
return -ENOSYS;
return ops->tx_data(dev, data, data_size);
}
UCLASS_DRIVER(i2s) = {
.id = UCLASS_I2S,
.name = "i2s",
.per_device_auto_alloc_size = sizeof(struct i2s_uc_priv),
};