linux-kernel - [PATCH 3/4] ASoC: fsl-asoc-card: Add optional dt property for setting mclk-id

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Message-Id: <20211203134930.128703-4-ariel.dalessandro@collabora.com>
Date:   Fri,  3 Dec 2021 10:49:29 -0300
From:   Ariel D'Alessandro <ariel.dalessandro@...labora.com>
To:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Cc:     Xiubo.Lee@...il.com, ariel.dalessandro@...labora.com,
        bcousson@...libre.com, broonie@...nel.org, festevam@...il.com,
        kuninori.morimoto.gx@...esas.com, lgirdwood@...il.com,
        michael@...rulasolutions.com, nicoleotsuka@...il.com,
        perex@...ex.cz, robh+dt@...nel.org, shengjiu.wang@...il.com,
        tiwai@...e.com, tony@...mide.com
Subject: [PATCH 3/4] ASoC: fsl-asoc-card: Add optional dt property for setting mclk-id

Sound cards may allow using different main clock inputs. In the generic
fsl-asoc-card driver, these values are hardcoded for each specific card
configuration.

Let's make it more flexible, allowing setting mclk-id from the
device-tree node. Otherwise, the default value for each card
configuration is used.

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
---
 Documentation/devicetree/bindings/sound/fsl-asoc-card.txt | 1 +
 sound/soc/fsl/fsl-asoc-card.c                             | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
index 23d83fa7609f..b219626a5403 100644
--- a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
@@ -82,6 +82,7 @@ Optional properties:
   - dai-format		: audio format, for details see simple-card.yaml.
   - frame-inversion	: dai-link uses frame clock inversion, for details see simple-card.yaml.
   - bitclock-inversion	: dai-link uses bit clock inversion, for details see simple-card.yaml.
+  - mclk-id		: main clock id, specific for each card configuration.
 
 Optional unless SSI is selected as a CPU DAI:
 
diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index 90cbed496f98..bb962e04d40b 100644
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -693,6 +693,12 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 		goto asrc_fail;
 	}
 
+	/*
+	 * Allow setting mclk-id from the device-tree node. Otherwise, the
+	 * default value for each card configuration is used.
+	 */
+	of_property_read_u32(np, "mclk-id", &priv->codec_priv.mclk_id);
+
 	/* Format info from DT is optional. */
 	snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL, &bitclkprovider, &frameprovider);
 	if (bitclkprovider || frameprovider) {
-- 
2.30.2