linux/sound/soc/atmel/sam9x5_wm8731.c
Kuninori Morimoto e1be6aa098
ASoC: atmel: sam9x5_wm8731: consider CPU-Platform possibility
commit ced5b08020 ("ASoC: atmel: sam9x5_wm8731: don't select unnecessary
Platform")

Current ALSA SoC avoid to add duplicate component to rtd,
and this driver was selecting CPU component as Platform component.
Thus, above patch removed Platform settings from this driver,
because it assumed these are same component.

But, some CPU driver is using generic DMAEngine, in such case, both
CPU component and Platform component will have same of_node/name.
In other words, there are some components which are different but
have same of_node/name.

In such case, Card driver definitely need to select Platform even
though it is same as CPU.
It is depends on CPU driver, but is difficult to know it from Card driver.
This patch reverts above patch.

Fixes: commit ced5b08020 ("ASoC: atmel: sam9x5_wm8731: don't select unnecessary Platform")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-28 15:10:41 +01:00

211 lines
5.1 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
* that are using WM8731 as codec.
*
* Copyright (C) 2011 Atmel,
* Nicolas Ferre <nicolas.ferre@atmel.com>
*
* Copyright (C) 2013 Paratronic,
* Richard Genoud <richard.genoud@gmail.com>
*
* Based on sam9g20_wm8731.c by:
* Sedji Gaouaou <sedji.gaouaou@atmel.com>
*/
#include <linux/of.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
#include "../codecs/wm8731.h"
#include "atmel_ssc_dai.h"
#define MCLK_RATE 12288000
#define DRV_NAME "sam9x5-snd-wm8731"
struct sam9x5_drvdata {
int ssc_id;
};
/*
* Logic for a wm8731 as connected on a at91sam9x5ek based board.
*/
static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct device *dev = rtd->dev;
int ret;
dev_dbg(dev, "%s called\n", __func__);
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
MCLK_RATE, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
return ret;
}
return 0;
}
/*
* Audio paths on at91sam9x5ek board:
*
* |A| ------------> | | ---R----> Headphone Jack
* |T| <----\ | WM | ---L--/
* |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
* |1| <------------ | | <--L--/
*/
static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *codec_np, *cpu_np;
struct snd_soc_card *card;
struct snd_soc_dai_link *dai;
struct sam9x5_drvdata *priv;
struct snd_soc_dai_link_component *comp;
int ret;
if (!np) {
dev_err(&pdev->dev, "No device node supplied\n");
return -EINVAL;
}
card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
if (!dai || !card || !priv || !comp) {
ret = -ENOMEM;
goto out;
}
snd_soc_card_set_drvdata(card, priv);
card->dev = &pdev->dev;
card->owner = THIS_MODULE;
card->dai_link = dai;
card->num_links = 1;
card->dapm_widgets = sam9x5_dapm_widgets;
card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
dai->cpus = &comp[0];
dai->num_cpus = 1;
dai->codecs = &comp[1];
dai->num_codecs = 1;
dai->platforms = &comp[2];
dai->num_platforms = 1;
dai->name = "WM8731";
dai->stream_name = "WM8731 PCM";
dai->codecs->dai_name = "wm8731-hifi";
dai->init = sam9x5_wm8731_init;
dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM;
ret = snd_soc_of_parse_card_name(card, "atmel,model");
if (ret) {
dev_err(&pdev->dev, "atmel,model node missing\n");
goto out;
}
ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
if (ret) {
dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
goto out;
}
codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
ret = -EINVAL;
goto out;
}
dai->codecs->of_node = codec_np;
cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
ret = -EINVAL;
goto out;
}
dai->cpus->of_node = cpu_np;
dai->platforms->of_node = cpu_np;
priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
ret = atmel_ssc_set_audio(priv->ssc_id);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n",
ret, priv->ssc_id);
goto out;
}
of_node_put(codec_np);
of_node_put(cpu_np);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "Platform device allocation failed\n");
goto out_put_audio;
}
dev_dbg(&pdev->dev, "%s ok\n", __func__);
return ret;
out_put_audio:
atmel_ssc_put_audio(priv->ssc_id);
out:
return ret;
}
static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct sam9x5_drvdata *priv = card->drvdata;
snd_soc_unregister_card(card);
atmel_ssc_put_audio(priv->ssc_id);
return 0;
}
static const struct of_device_id sam9x5_wm8731_of_match[] = {
{ .compatible = "atmel,sam9x5-wm8731-audio", },
{},
};
MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
static struct platform_driver sam9x5_wm8731_driver = {
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
},
.probe = sam9x5_wm8731_driver_probe,
.remove = sam9x5_wm8731_driver_remove,
};
module_platform_driver(sam9x5_wm8731_driver);
/* Module information */
MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);