linux-kernel - [PATCHv4 8/9] ASoC: fsl-asoc-card: add DT property "cpu-system-clock-direction-out"

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Date: Wed, 15 May 2024 15:54:10 +0200
From: Elinor Montmasson <elinor.montmasson@...oirfairelinux.com>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shengjiu Wang <shengjiu.wang@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>
Cc: linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org,
	linuxppc-dev@...ts.ozlabs.org,
	Elinor Montmasson <elinor.montmasson@...oirfairelinux.com>
Subject: [PATCHv4 8/9] ASoC: fsl-asoc-card: add DT property "cpu-system-clock-direction-out"

Add new optional DT property "cpu-system-clock-direction-out" to set
sysclk direction as "out" for the CPU DAI when using the generic codec.
It is set for both Tx and Rx.
If not set, the direction is "in".
The way the direction value is used is up to the CPU DAI driver
implementation.

Signed-off-by: Elinor Montmasson <elinor.montmasson@...oirfairelinux.com>
---
 sound/soc/fsl/fsl-asoc-card.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index c7fc9c16f761..f3fc2b29c92f 100644
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -760,6 +760,10 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 			priv->cpu_priv.sysclk_freq[RX] = priv->cpu_priv.sysclk_freq[TX];
 			clk_put(cpu_sysclk);
 		}
+		priv->cpu_priv.sysclk_dir[TX] =
+			of_property_read_bool(np, "cpu-system-clock-direction-out") ?
+			SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
+		priv->cpu_priv.sysclk_dir[RX] = priv->cpu_priv.sysclk_dir[TX];
 	} else {
 		dev_err(&pdev->dev, "unknown Device Tree compatible\n");
 		ret = -EINVAL;
-- 
2.34.1