linux/sound/soc/ux500/mop500.c
Uwe Kleine-König d2b6d5b85a
ASoC: ux500: mop500: Convert to platform remove callback returning void
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230315150745.67084-168-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:09:32 +00:00

168 lines
4.2 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson SA 2012
*
* Author: Ola Lilja (ola.o.lilja@stericsson.com)
* for ST-Ericsson.
*/
#include <asm/mach-types.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/of.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include "ux500_pcm.h"
#include "ux500_msp_dai.h"
#include "mop500_ab8500.h"
/* Define the whole MOP500 soundcard, linking platform to the codec-drivers */
SND_SOC_DAILINK_DEFS(link1,
DAILINK_COMP_ARRAY(COMP_CPU("ux500-msp-i2s.1")),
DAILINK_COMP_ARRAY(COMP_CODEC("ab8500-codec.0", "ab8500-codec-dai.0")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("ux500-msp-i2s.1")));
SND_SOC_DAILINK_DEFS(link2,
DAILINK_COMP_ARRAY(COMP_CPU("ux500-msp-i2s.3")),
DAILINK_COMP_ARRAY(COMP_CODEC("ab8500-codec.0", "ab8500-codec-dai.1")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("ux500-msp-i2s.3")));
static struct snd_soc_dai_link mop500_dai_links[] = {
{
.name = "ab8500_0",
.stream_name = "ab8500_0",
.init = mop500_ab8500_machine_init,
.ops = mop500_ab8500_ops,
SND_SOC_DAILINK_REG(link1),
},
{
.name = "ab8500_1",
.stream_name = "ab8500_1",
.init = NULL,
.ops = mop500_ab8500_ops,
SND_SOC_DAILINK_REG(link2),
},
};
static struct snd_soc_card mop500_card = {
.name = "MOP500-card",
.owner = THIS_MODULE,
.probe = NULL,
.dai_link = mop500_dai_links,
.num_links = ARRAY_SIZE(mop500_dai_links),
};
static void mop500_of_node_put(void)
{
int i;
for (i = 0; i < 2; i++)
of_node_put(mop500_dai_links[i].cpus->of_node);
/* Both links use the same codec, which is refcounted only once */
of_node_put(mop500_dai_links[0].codecs->of_node);
}
static int mop500_of_probe(struct platform_device *pdev,
struct device_node *np)
{
struct device_node *codec_np, *msp_np[2];
int i;
msp_np[0] = of_parse_phandle(np, "stericsson,cpu-dai", 0);
msp_np[1] = of_parse_phandle(np, "stericsson,cpu-dai", 1);
codec_np = of_parse_phandle(np, "stericsson,audio-codec", 0);
if (!(msp_np[0] && msp_np[1] && codec_np)) {
dev_err(&pdev->dev, "Phandle missing or invalid\n");
for (i = 0; i < 2; i++)
of_node_put(msp_np[i]);
of_node_put(codec_np);
return -EINVAL;
}
for (i = 0; i < 2; i++) {
mop500_dai_links[i].cpus->of_node = msp_np[i];
mop500_dai_links[i].cpus->dai_name = NULL;
mop500_dai_links[i].platforms->of_node = msp_np[i];
mop500_dai_links[i].platforms->name = NULL;
mop500_dai_links[i].codecs->of_node = codec_np;
mop500_dai_links[i].codecs->name = NULL;
}
snd_soc_of_parse_card_name(&mop500_card, "stericsson,card-name");
return 0;
}
static int mop500_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int ret;
dev_dbg(&pdev->dev, "%s: Enter.\n", __func__);
mop500_card.dev = &pdev->dev;
ret = mop500_of_probe(pdev, np);
if (ret)
return ret;
dev_dbg(&pdev->dev, "%s: Card %s: Set platform drvdata.\n",
__func__, mop500_card.name);
snd_soc_card_set_drvdata(&mop500_card, NULL);
dev_dbg(&pdev->dev, "%s: Card %s: num_links = %d\n",
__func__, mop500_card.name, mop500_card.num_links);
dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: name = %s\n",
__func__, mop500_card.name, mop500_card.dai_link[0].name);
dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: stream_name = %s\n",
__func__, mop500_card.name,
mop500_card.dai_link[0].stream_name);
ret = snd_soc_register_card(&mop500_card);
if (ret)
dev_err(&pdev->dev,
"Error: snd_soc_register_card failed (%d)!\n", ret);
return ret;
}
static void mop500_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
pr_debug("%s: Enter.\n", __func__);
snd_soc_unregister_card(card);
mop500_ab8500_remove(card);
mop500_of_node_put();
}
static const struct of_device_id snd_soc_mop500_match[] = {
{ .compatible = "stericsson,snd-soc-mop500", },
{},
};
MODULE_DEVICE_TABLE(of, snd_soc_mop500_match);
static struct platform_driver snd_soc_mop500_driver = {
.driver = {
.name = "snd-soc-mop500",
.of_match_table = snd_soc_mop500_match,
},
.probe = mop500_probe,
.remove_new = mop500_remove,
};
module_platform_driver(snd_soc_mop500_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC MOP500 board driver");
MODULE_AUTHOR("Ola Lilja");