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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/sound/soc/atmel/atmel-pcm-dma.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * atmel-pcm-dma.c  --  ALSA PCM DMA support for the Atmel SoC.
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  *
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@@ -8,20 +9,6 @@
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  * Based on atmel-pcm by:
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  * Sedji Gaouaou <sedji.gaouaou@atmel.com>
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  * Copyright 2008 Atmel
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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  */
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 #include <linux/module.h>
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@@ -31,7 +18,6 @@
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 #include <linux/dma-mapping.h>
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 #include <linux/dmaengine.h>
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 #include <linux/atmel-ssc.h>
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-#include <linux/platform_data/dma-atmel.h>
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 #include <sound/core.h>
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 #include <sound/pcm.h>
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@@ -57,7 +43,7 @@
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 	.buffer_bytes_max	= 512 * 1024,
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 };
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-/**
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+/*
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  * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC
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  *
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  * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to
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@@ -66,10 +52,10 @@
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 static void atmel_pcm_dma_irq(u32 ssc_sr,
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 	struct snd_pcm_substream *substream)
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 {
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-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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 	struct atmel_pcm_dma_params *prtd;
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-	prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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+	prtd = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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 	if (ssc_sr & prtd->mask->ssc_error) {
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 		if (snd_pcm_running(substream))
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@@ -91,12 +77,12 @@
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 static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
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 	struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config)
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 {
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-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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 	struct atmel_pcm_dma_params *prtd;
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 	struct ssc_device *ssc;
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 	int ret;
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-	prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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+	prtd = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
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 	ssc = prtd->ssc;
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 	ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
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@@ -124,15 +110,10 @@
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 int atmel_pcm_dma_platform_register(struct device *dev)
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 {
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-	return snd_dmaengine_pcm_register(dev, &atmel_dmaengine_pcm_config, 0);
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+	return devm_snd_dmaengine_pcm_register(dev,
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+					&atmel_dmaengine_pcm_config, 0);
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 }
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 EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
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-
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-void atmel_pcm_dma_platform_unregister(struct device *dev)
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-{
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-	snd_dmaengine_pcm_unregister(dev);
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-}
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-EXPORT_SYMBOL(atmel_pcm_dma_platform_unregister);
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 MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
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 MODULE_DESCRIPTION("Atmel DMA based PCM module");