修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/sound/spi/at73c213.c
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..
@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
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  *
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  * Copyright (C) 2006-2007 Atmel Norway
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published by
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- * the Free Software Foundation.
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  */
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7
 
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 /*#define DEBUG*/
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@@ -39,7 +36,7 @@
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 #define BITRATE_MAX	50000 /* Hardware limit. */
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 /* Initial (hardware reset) AT73C213 register values. */
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-static u8 snd_at73c213_original_image[18] =
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+static const u8 snd_at73c213_original_image[18] =
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 {
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 	0x00,	/* 00 - CTRL    */
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 	0x05,	/* 01 - LLIG    */
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@@ -221,7 +218,9 @@
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 	runtime->hw = snd_at73c213_playback_hw;
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 	chip->substream = substream;
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-	clk_enable(chip->ssc->clk);
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+	err = clk_enable(chip->ssc->clk);
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+	if (err)
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+		return err;
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 	return 0;
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 }
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@@ -245,13 +244,7 @@
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 	val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
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 	ssc_writel(chip->ssc->regs, TFMR, val);
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-	return snd_pcm_lib_malloc_pages(substream,
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-					params_buffer_bytes(hw_params));
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-}
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-
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-static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
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-{
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-	return snd_pcm_lib_free_pages(substream);
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+	return 0;
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 }
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 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
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@@ -325,9 +318,7 @@
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 static const struct snd_pcm_ops at73c213_playback_ops = {
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 	.open		= snd_at73c213_pcm_open,
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 	.close		= snd_at73c213_pcm_close,
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-	.ioctl		= snd_pcm_lib_ioctl,
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 	.hw_params	= snd_at73c213_pcm_hw_params,
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-	.hw_free	= snd_at73c213_pcm_hw_free,
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 	.prepare	= snd_at73c213_pcm_prepare,
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 	.trigger	= snd_at73c213_pcm_trigger,
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 	.pointer	= snd_at73c213_pcm_pointer,
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@@ -350,7 +341,7 @@
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 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
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-	retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
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+	snd_pcm_set_managed_buffer_all(chip->pcm,
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 			SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
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 			64 * 1024, 64 * 1024);
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 out:
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@@ -668,7 +659,7 @@
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 			| (mask << 24) | (invert << 22))		\
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 }
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-static struct snd_kcontrol_new snd_at73c213_controls[] = {
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+static const struct snd_kcontrol_new snd_at73c213_controls[] = {
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 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
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 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
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 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
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@@ -787,7 +778,9 @@
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 		goto out;
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 	/* Enable DAC master clock. */
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-	clk_enable(chip->board->dac_clk);
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+	retval = clk_enable(chip->board->dac_clk);
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+	if (retval)
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+		goto out;
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 	/* Initialize at73c213 on SPI bus. */
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 	retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
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@@ -885,7 +878,7 @@
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 static int snd_at73c213_dev_init(struct snd_card *card,
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 				 struct spi_device *spi)
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 {
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-	static struct snd_device_ops ops = {
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+	static const struct snd_device_ops ops = {
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 		.dev_free	= snd_at73c213_dev_free,
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 	};
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 	struct snd_at73c213 *chip = get_chip(card);
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@@ -900,7 +893,9 @@
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 	chip->card = card;
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 	chip->irq = -1;
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-	clk_enable(chip->ssc->clk);
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+	retval = clk_enable(chip->ssc->clk);
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+	if (retval)
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+		return retval;
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 	retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
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 	if (retval) {
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@@ -1019,7 +1014,9 @@
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 	int retval;
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 	/* Stop playback. */
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-	clk_enable(chip->ssc->clk);
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+	retval = clk_enable(chip->ssc->clk);
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+	if (retval)
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+		goto out;
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 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
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 	clk_disable(chip->ssc->clk);
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@@ -1099,9 +1096,16 @@
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 {
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 	struct snd_card *card = dev_get_drvdata(dev);
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 	struct snd_at73c213 *chip = card->private_data;
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+	int retval;
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-	clk_enable(chip->board->dac_clk);
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-	clk_enable(chip->ssc->clk);
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+	retval = clk_enable(chip->board->dac_clk);
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+	if (retval)
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+		return retval;
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+	retval = clk_enable(chip->ssc->clk);
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+	if (retval) {
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+		clk_disable(chip->board->dac_clk);
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+		return retval;
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+	}
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 	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
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 	return 0;