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From:   Shengjiu Wang <shengjiu.wang@nxp.com>
To:     hverkuil@xs4all.nl, sakari.ailus@iki.fi, tfiga@chromium.org,
        m.szyprowski@samsung.com, mchehab@kernel.org,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com,
        nicoleotsuka@gmail.com, lgirdwood@gmail.com, broonie@kernel.org,
        perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org,
        linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH v3 4/9] ASoC: fsl_asrc: register m2m platform device
Date:   Thu, 14 Sep 2023 13:54:00 +0800
Message-Id: <1694670845-17070-5-git-send-email-shengjiu.wang@nxp.com>
In-Reply-To: <1694670845-17070-1-git-send-email-shengjiu.wang@nxp.com>
References: <1694670845-17070-1-git-send-email-shengjiu.wang@nxp.com>
Precedence: bulk

Register m2m platform device, that user can
use M2M feature.

Defined platform data structure and platform
driver name.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 include/sound/fsl_asrc_common.h | 12 ++++++++++++
 sound/soc/fsl/fsl_asrc.c        | 12 ++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/sound/fsl_asrc_common.h b/include/sound/fsl_asrc_common.h
index 7f7e725075fe..e978a2f9cd24 100644
--- a/include/sound/fsl_asrc_common.h
+++ b/include/sound/fsl_asrc_common.h
@@ -69,6 +69,7 @@ struct fsl_asrc_pair {
  * @dma_params_rx: DMA parameters for receive channel
  * @dma_params_tx: DMA parameters for transmit channel
  * @pdev: platform device pointer
+ * @m2m_pdev: m2m platform device pointer
  * @regmap: regmap handler
  * @paddr: physical address to the base address of registers
  * @mem_clk: clock source to access register
@@ -104,6 +105,7 @@ struct fsl_asrc {
 	struct snd_dmaengine_dai_dma_data dma_params_rx;
 	struct snd_dmaengine_dai_dma_data dma_params_tx;
 	struct platform_device *pdev;
+	struct platform_device *m2m_pdev;
 	struct regmap *regmap;
 	unsigned long paddr;
 	struct clk *mem_clk;
@@ -144,6 +146,16 @@ struct fsl_asrc {
 	void *private;
 };
 
+/**
+ * struct fsl_asrc_m2m_pdata - platform data
+ * @asrc: pointer to struct fsl_asrc
+ *
+ */
+struct fsl_asrc_m2m_pdata {
+	struct fsl_asrc *asrc;
+};
+
+#define M2M_DRV_NAME "fsl_asrc_m2m"
 #define DRV_NAME "fsl-asrc-dai"
 extern struct snd_soc_component_driver fsl_asrc_component;
 
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index f9d830e0957f..7b72d6bcf281 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -1208,6 +1208,7 @@ static int fsl_asrc_runtime_suspend(struct device *dev);
 static int fsl_asrc_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
+	struct fsl_asrc_m2m_pdata m2m_pdata;
 	struct fsl_asrc_priv *asrc_priv;
 	struct fsl_asrc *asrc;
 	struct resource *res;
@@ -1392,6 +1393,12 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 		goto err_pm_get_sync;
 	}
 
+	m2m_pdata.asrc = asrc;
+	asrc->m2m_pdev = platform_device_register_data(&pdev->dev,
+						       M2M_DRV_NAME,
+						       PLATFORM_DEVID_AUTO,
+						       &m2m_pdata,
+						       sizeof(m2m_pdata));
 	return 0;
 
 err_pm_get_sync:
@@ -1404,6 +1411,11 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 
 static void fsl_asrc_remove(struct platform_device *pdev)
 {
+	struct fsl_asrc *asrc = dev_get_drvdata(&pdev->dev);
+
+	if (asrc->m2m_pdev && !IS_ERR(asrc->m2m_pdev))
+		platform_device_unregister(asrc->m2m_pdev);
+
 	pm_runtime_disable(&pdev->dev);
 	if (!pm_runtime_status_suspended(&pdev->dev))
 		fsl_asrc_runtime_suspend(&pdev->dev);
-- 
2.34.1