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author | Kenneth Westfield <kwestfie@codeaurora.org> | 2015-02-05 12:53:40 -0800 |
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committer | Mark Brown <broonie@kernel.org> | 2015-02-07 06:12:13 +0800 |
commit | af5adf129369125bba8fa7ca594a7abaf226b27c (patch) | |
tree | c1c6e39ff436a20eb4d91e9f21e3f678bd1f10f1 /sound/soc/codecs/max98357a.c | |
parent | c028d4165fe56fc51efb53dd4b04aa157d005dc5 (diff) | |
download | linux-stable-af5adf129369125bba8fa7ca594a7abaf226b27c.tar.gz linux-stable-af5adf129369125bba8fa7ca594a7abaf226b27c.tar.bz2 linux-stable-af5adf129369125bba8fa7ca594a7abaf226b27c.zip |
ASoC: max98357a: Add MAX98357A codec driver
Add codec driver for the Maxim MAX98357A DAC.
Signed-off-by: Kenneth Westfield <kwestfie@codeaurora.org>
Acked-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/max98357a.c')
-rw-r--r-- | sound/soc/codecs/max98357a.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/sound/soc/codecs/max98357a.c b/sound/soc/codecs/max98357a.c new file mode 100644 index 000000000000..98b915314d7a --- /dev/null +++ b/sound/soc/codecs/max98357a.c @@ -0,0 +1,138 @@ +/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * max98357a.c -- MAX98357A ALSA SoC Codec driver + */ + +#include <linux/module.h> +#include <linux/gpio.h> +#include <sound/soc.h> + +#define DRV_NAME "max98357a" + +static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + gpiod_set_value(sdmode, 1); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + gpiod_set_value(sdmode, 0); + break; + } + + return 0; +} + +static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { + SND_SOC_DAPM_DAC("SDMode", NULL, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("Speaker"), +}; + +static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { + {"Speaker", NULL, "SDMode"}, +}; + +static int max98357a_codec_probe(struct snd_soc_codec *codec) +{ + struct gpio_desc *sdmode; + + sdmode = devm_gpiod_get(codec->dev, "sdmode"); + if (IS_ERR(sdmode)) { + dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n", + __func__, PTR_ERR(sdmode)); + return PTR_ERR(sdmode); + } + gpiod_direction_output(sdmode, 0); + snd_soc_codec_set_drvdata(codec, sdmode); + + return 0; +} + +static struct snd_soc_codec_driver max98357a_codec_driver = { + .probe = max98357a_codec_probe, + .dapm_widgets = max98357a_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), + .dapm_routes = max98357a_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), +}; + +static struct snd_soc_dai_ops max98357a_dai_ops = { + .trigger = max98357a_daiops_trigger, +}; + +static struct snd_soc_dai_driver max98357a_dai_driver = { + .name = DRV_NAME, + .playback = { + .stream_name = DRV_NAME "-playback", + .formats = SNDRV_PCM_FMTBIT_S16 | + SNDRV_PCM_FMTBIT_S24 | + SNDRV_PCM_FMTBIT_S32, + .rates = SNDRV_PCM_RATE_8000 | + SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000, + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 1, + .channels_max = 2, + }, + .ops = &max98357a_dai_ops, +}; + +static int max98357a_platform_probe(struct platform_device *pdev) +{ + int ret; + + ret = snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver, + &max98357a_dai_driver, 1); + if (ret) + dev_err(&pdev->dev, "%s() error registering codec driver: %d\n", + __func__, ret); + + return ret; +} + +static int max98357a_platform_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id max98357a_device_id[] = { + { .compatible = "maxim," DRV_NAME, }, + {} +}; +#endif + +static struct platform_driver max98357a_platform_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(max98357a_device_id), + }, + .probe = max98357a_platform_probe, + .remove = max98357a_platform_remove, +}; +module_platform_driver(max98357a_platform_driver); + +MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DEVICE_TABLE(of, max98357a_device_id); |