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// SPDX-License-Identifier: GPL-2.0
/*
* mtk-soundcard-driver.c -- MediaTek soundcard driver common
*
* Copyright (c) 2022 MediaTek Inc.
* Author: Trevor Wu <trevor.wu@mediatek.com>
*/
#include <linux/module.h>
#include <linux/of.h>
#include <sound/soc.h>
#include "mtk-soundcard-driver.h"
static int set_card_codec_info(struct snd_soc_card *card,
struct device_node *sub_node,
struct snd_soc_dai_link *dai_link)
{
struct device *dev = card->dev;
struct device_node *codec_node;
int ret;
codec_node = of_get_child_by_name(sub_node, "codec");
if (!codec_node)
return -EINVAL;
/* set card codec info */
ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, dai_link);
of_node_put(codec_node);
if (ret < 0)
return dev_err_probe(dev, ret, "%s: codec dai not found\n",
dai_link->name);
return 0;
}
int parse_dai_link_info(struct snd_soc_card *card)
{
struct device *dev = card->dev;
struct device_node *sub_node;
struct snd_soc_dai_link *dai_link;
const char *dai_link_name;
int ret, i;
/* Loop over all the dai link sub nodes */
for_each_available_child_of_node(dev->of_node, sub_node) {
if (of_property_read_string(sub_node, "link-name",
&dai_link_name))
return -EINVAL;
for_each_card_prelinks(card, i, dai_link) {
if (!strcmp(dai_link_name, dai_link->name))
break;
}
if (i >= card->num_links)
return -EINVAL;
ret = set_card_codec_info(card, sub_node, dai_link);
if (ret < 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(parse_dai_link_info);
void clean_card_reference(struct snd_soc_card *card)
{
struct snd_soc_dai_link *dai_link;
int i;
/* release codec reference gotten by set_card_codec_info */
for_each_card_prelinks(card, i, dai_link)
snd_soc_of_put_dai_link_codecs(dai_link);
}
EXPORT_SYMBOL_GPL(clean_card_reference);
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