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Ingenic JZ4740 I2S controller

Required properties:

- compatible : "ingenic,jz4740-i2s"

- reg : I2S registers location and length

- clocks : AIC and I2S PLL clock specifiers.

- clock-names: "aic" and "i2s"

- dmas: DMA controller phandle and DMA request line for I2S Tx and Rx channels

- dma-names: Must be "tx" and "rx"

Example:

i2s: i2s@10020000 {

	compatible = "ingenic,jz4740-i2s";

	reg = <0x10020000 0x94>;

	clocks = <&cgu JZ4740_CLK_AIC>, <&cgu JZ4740_CLK_I2SPLL>;

	clock-names = "aic", "i2s";

	dmas = <&dma 2>, <&dma 3>;

	dma-names = "tx", "rx";

};

Maxim MAX98357A audio DAC

This node models the Maxim MAX98357A DAC.

Required properties:

- compatible   : "maxim,max98357a"

- sdmode-gpios : GPIO specifier for the GPIO -> DAC SDMODE pin

Example:

max98357a {

	compatible = "maxim,max98357a";

	sdmode-gpios = <&qcom_pinmux 25 0>;

};

	select SND_SOC_MAX98088 if I2C

	select SND_SOC_MAX98090 if I2C

	select SND_SOC_MAX98095 if I2C

	select SND_SOC_MAX98357A

	select SND_SOC_MAX9850 if I2C

	select SND_SOC_MAX9768 if I2C

	select SND_SOC_MAX9877 if I2C

config SND_SOC_MAX98095

       tristate

config SND_SOC_MAX98357A

       tristate

config SND_SOC_MAX9850

	tristate

snd-soc-max98088-objs := max98088.o

snd-soc-max98090-objs := max98090.o

snd-soc-max98095-objs := max98095.o

snd-soc-max98357a-objs := max98357a.o

snd-soc-max9850-objs := max9850.o

snd-soc-mc13783-objs := mc13783.o

snd-soc-ml26124-objs := ml26124.o

obj-$(CONFIG_SND_SOC_MAX98088)	+= snd-soc-max98088.o

obj-$(CONFIG_SND_SOC_MAX98090)	+= snd-soc-max98090.o

obj-$(CONFIG_SND_SOC_MAX98095)	+= snd-soc-max98095.o

obj-$(CONFIG_SND_SOC_MAX98357A)	+= snd-soc-max98357a.o

obj-$(CONFIG_SND_SOC_MAX9850)	+= snd-soc-max9850.o

obj-$(CONFIG_SND_SOC_MC13783)	+= snd-soc-mc13783.o

obj-$(CONFIG_SND_SOC_ML26124)	+= snd-soc-ml26124.o

/* 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, },

	{}

};

MODULE_DEVICE_TABLE(of, max98357a_device_id);

#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);