1 /* 2 * This is a simple driver for the GTM601 Voice PCM interface 3 * 4 * Copyright (C) 2015 Goldelico GmbH 5 * 6 * Author: Marek Belisko <marek@goldelico.com> 7 * 8 * Based on wm8727.c driver 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 #include <linux/device.h> 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/initval.h> 23 #include <sound/soc.h> 24 25 static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = { 26 SND_SOC_DAPM_OUTPUT("AOUT"), 27 SND_SOC_DAPM_INPUT("AIN"), 28 }; 29 30 static const struct snd_soc_dapm_route gtm601_dapm_routes[] = { 31 { "AOUT", NULL, "Playback" }, 32 { "Capture", NULL, "AIN" }, 33 }; 34 35 static struct snd_soc_dai_driver gtm601_dai = { 36 .name = "gtm601", 37 .playback = { 38 .stream_name = "Playback", 39 .channels_min = 1, 40 .channels_max = 1, 41 .rates = SNDRV_PCM_RATE_8000, 42 .formats = SNDRV_PCM_FMTBIT_S16_LE, 43 }, 44 .capture = { 45 .stream_name = "Capture", 46 .channels_min = 1, 47 .channels_max = 1, 48 .rates = SNDRV_PCM_RATE_8000, 49 .formats = SNDRV_PCM_FMTBIT_S16_LE, 50 }, 51 }; 52 53 static const struct snd_soc_component_driver soc_component_dev_gtm601 = { 54 .dapm_widgets = gtm601_dapm_widgets, 55 .num_dapm_widgets = ARRAY_SIZE(gtm601_dapm_widgets), 56 .dapm_routes = gtm601_dapm_routes, 57 .num_dapm_routes = ARRAY_SIZE(gtm601_dapm_routes), 58 .idle_bias_on = 1, 59 .use_pmdown_time = 1, 60 .endianness = 1, 61 .non_legacy_dai_naming = 1, 62 }; 63 64 static int gtm601_platform_probe(struct platform_device *pdev) 65 { 66 return devm_snd_soc_register_component(&pdev->dev, 67 &soc_component_dev_gtm601, >m601_dai, 1); 68 } 69 70 #if defined(CONFIG_OF) 71 static const struct of_device_id gtm601_codec_of_match[] = { 72 { .compatible = "option,gtm601", }, 73 {}, 74 }; 75 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match); 76 #endif 77 78 static struct platform_driver gtm601_codec_driver = { 79 .driver = { 80 .name = "gtm601", 81 .of_match_table = of_match_ptr(gtm601_codec_of_match), 82 }, 83 .probe = gtm601_platform_probe, 84 }; 85 86 module_platform_driver(gtm601_codec_driver); 87 88 MODULE_DESCRIPTION("ASoC gtm601 driver"); 89 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>"); 90 MODULE_LICENSE("GPL"); 91 MODULE_ALIAS("platform:gtm601"); 92