linux-kernel - [PATCH v2 2/5] ASoC: amd: Passing card structure based on codec

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Date:   Tue, 28 Jul 2020 21:32:52 +0530
From:   Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <Alexander.Deucher@....com>,
        Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>,
        Akshu Agrawal <akshu.agrawal@....com>,
        "Kuninori Morimoto" <kuninori.morimoto.gx@...esas.com>,
        YueHaibing <yuehaibing@...wei.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/5] ASoC: amd: Passing card structure based on codec

Passing specific snd_soc_card structure depending on the ACPI ID.
In future we can add other IDs in the ACPI table and pass the structure.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
---
 sound/soc/amd/acp3x-rt5682-max9836.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/sound/soc/amd/acp3x-rt5682-max9836.c b/sound/soc/amd/acp3x-rt5682-max9836.c
index 8b5af064864f..2c672657d139 100644
--- a/sound/soc/amd/acp3x-rt5682-max9836.c
+++ b/sound/soc/amd/acp3x-rt5682-max9836.c
@@ -30,6 +30,7 @@ static struct snd_soc_jack pco_jack;
 static struct clk *rt5682_dai_wclk;
 static struct clk *rt5682_dai_bclk;
 static struct gpio_desc *dmic_sel;
+void *soc_is_rltk_max(struct device *dev);
 
 static int acp3x_5682_init(struct snd_soc_pcm_runtime *rtd)
 {
@@ -326,18 +327,32 @@ static struct snd_soc_card acp3x_5682 = {
 	.num_controls = ARRAY_SIZE(acp3x_5682_mc_controls),
 };
 
+void *soc_is_rltk_max(struct device *dev)
+{
+	const struct acpi_device_id *match;
+
+	match = acpi_match_device(dev->driver->acpi_match_table, dev);
+	if (!match)
+		return NULL;
+	return (void *)match->driver_data;
+}
+
 static int acp3x_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct snd_soc_card *card;
 	struct acp3x_platform_info *machine;
+	struct device *dev = &pdev->dev;
+
+	card = (struct snd_soc_card *)soc_is_rltk_max(dev);
+	if (!card)
+		return -ENODEV;
 
 	machine = devm_kzalloc(&pdev->dev, sizeof(*machine), GFP_KERNEL);
 	if (!machine)
 		return -ENOMEM;
 
-	card = &acp3x_5682;
-	acp3x_5682.dev = &pdev->dev;
+	card->dev = &pdev->dev;
 	platform_set_drvdata(pdev, card);
 	snd_soc_card_set_drvdata(card, machine);
 
@@ -348,18 +363,18 @@ static int acp3x_probe(struct platform_device *pdev)
 		return PTR_ERR(dmic_sel);
 	}
 
-	ret = devm_snd_soc_register_card(&pdev->dev, &acp3x_5682);
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret) {
 		dev_err(&pdev->dev,
 				"devm_snd_soc_register_card(%s) failed: %d\n",
-				acp3x_5682.name, ret);
+				card->name, ret);
 		return ret;
 	}
 	return 0;
 }
 
 static const struct acpi_device_id acp3x_audio_acpi_match[] = {
-	{ "AMDI5682", 0 },
+	{ "AMDI5682", (unsigned long)&acp3x_5682},
 	{},
 };
 MODULE_DEVICE_TABLE(acpi, acp3x_audio_acpi_match);
-- 
2.17.1