54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
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/*
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* soc-cache.c -- ASoC register cache helpers
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*
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* Copyright 2009 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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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 as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <sound/soc.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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int snd_soc_cache_init(struct snd_soc_codec *codec)
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{
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const struct snd_soc_codec_driver *codec_drv = codec->driver;
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size_t reg_size;
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reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
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if (!reg_size)
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return 0;
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dev_dbg(codec->dev, "ASoC: Initializing cache for %s codec\n",
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codec->component.name);
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if (codec_drv->reg_cache_default)
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codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
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reg_size, GFP_KERNEL);
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else
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codec->reg_cache = kzalloc(reg_size, GFP_KERNEL);
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if (!codec->reg_cache)
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return -ENOMEM;
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return 0;
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}
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/*
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* NOTE: keep in mind that this function might be called
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* multiple times.
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*/
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int snd_soc_cache_exit(struct snd_soc_codec *codec)
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{
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dev_dbg(codec->dev, "ASoC: Destroying cache for %s codec\n",
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codec->component.name);
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kfree(codec->reg_cache);
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codec->reg_cache = NULL;
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return 0;
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}
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