[linux-block.git] / sound / soc / codecs / pcm512x.c

/*
 * Driver for the PCM512x CODECs
 *
 * Author:	Mark Brown <broonie@linaro.org>
 *		Copyright 2014 Linaro Ltd
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * 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.
 */


#include <linux/init.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>

#include "pcm512x.h"

#define PCM512x_NUM_SUPPLIES 3
static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
	"AVDD",
	"DVDD",
	"CPVDD",
};

struct pcm512x_priv {
	struct regmap *regmap;
	struct clk *sclk;
	struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
	struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
};

/*
 * We can't use the same notifier block for more than one supply and
 * there's no way I can see to get from a callback to the caller
 * except container_of().
 */
#define PCM512x_REGULATOR_EVENT(n) \
static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
				      unsigned long event, void *data)    \
{ \
	struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
						    supply_nb[n]); \
	if (event & REGULATOR_EVENT_DISABLE) { \
		regcache_mark_dirty(pcm512x->regmap);	\
		regcache_cache_only(pcm512x->regmap, true);	\
	} \
	return 0; \
}

PCM512x_REGULATOR_EVENT(0)
PCM512x_REGULATOR_EVENT(1)
PCM512x_REGULATOR_EVENT(2)

static const struct reg_default pcm512x_reg_defaults[] = {
	{ PCM512x_RESET,             0x00 },
	{ PCM512x_POWER,             0x00 },
	{ PCM512x_MUTE,              0x00 },
	{ PCM512x_DSP,               0x00 },
	{ PCM512x_PLL_REF,           0x00 },
	{ PCM512x_DAC_ROUTING,       0x11 },
	{ PCM512x_DSP_PROGRAM,       0x01 },
	{ PCM512x_CLKDET,            0x00 },
	{ PCM512x_AUTO_MUTE,         0x00 },
	{ PCM512x_ERROR_DETECT,      0x00 },
	{ PCM512x_DIGITAL_VOLUME_1,  0x00 },
	{ PCM512x_DIGITAL_VOLUME_2,  0x30 },
	{ PCM512x_DIGITAL_VOLUME_3,  0x30 },
	{ PCM512x_DIGITAL_MUTE_1,    0x22 },
	{ PCM512x_DIGITAL_MUTE_2,    0x00 },
	{ PCM512x_DIGITAL_MUTE_3,    0x07 },
	{ PCM512x_OUTPUT_AMPLITUDE,  0x00 },
	{ PCM512x_ANALOG_GAIN_CTRL,  0x00 },
	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
	{ PCM512x_ANALOG_MUTE_CTRL,  0x00 },
	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
	{ PCM512x_VCOM_CTRL_1,       0x00 },
	{ PCM512x_VCOM_CTRL_2,       0x01 },
};

static bool pcm512x_readable(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case PCM512x_RESET:
	case PCM512x_POWER:
	case PCM512x_MUTE:
	case PCM512x_PLL_EN:
	case PCM512x_SPI_MISO_FUNCTION:
	case PCM512x_DSP:
	case PCM512x_GPIO_EN:
	case PCM512x_BCLK_LRCLK_CFG:
	case PCM512x_DSP_GPIO_INPUT:
	case PCM512x_MASTER_MODE:
	case PCM512x_PLL_REF:
	case PCM512x_PLL_COEFF_0:
	case PCM512x_PLL_COEFF_1:
	case PCM512x_PLL_COEFF_2:
	case PCM512x_PLL_COEFF_3:
	case PCM512x_PLL_COEFF_4:
	case PCM512x_DSP_CLKDIV:
	case PCM512x_DAC_CLKDIV:
	case PCM512x_NCP_CLKDIV:
	case PCM512x_OSR_CLKDIV:
	case PCM512x_MASTER_CLKDIV_1:
	case PCM512x_MASTER_CLKDIV_2:
	case PCM512x_FS_SPEED_MODE:
	case PCM512x_IDAC_1:
	case PCM512x_IDAC_2:
	case PCM512x_ERROR_DETECT:
	case PCM512x_I2S_1:
	case PCM512x_I2S_2:
	case PCM512x_DAC_ROUTING:
	case PCM512x_DSP_PROGRAM:
	case PCM512x_CLKDET:
	case PCM512x_AUTO_MUTE:
	case PCM512x_DIGITAL_VOLUME_1:
	case PCM512x_DIGITAL_VOLUME_2:
	case PCM512x_DIGITAL_VOLUME_3:
	case PCM512x_DIGITAL_MUTE_1:
	case PCM512x_DIGITAL_MUTE_2:
	case PCM512x_DIGITAL_MUTE_3:
	case PCM512x_GPIO_OUTPUT_1:
	case PCM512x_GPIO_OUTPUT_2:
	case PCM512x_GPIO_OUTPUT_3:
	case PCM512x_GPIO_OUTPUT_4:
	case PCM512x_GPIO_OUTPUT_5:
	case PCM512x_GPIO_OUTPUT_6:
	case PCM512x_GPIO_CONTROL_1:
	case PCM512x_GPIO_CONTROL_2:
	case PCM512x_OVERFLOW:
	case PCM512x_RATE_DET_1:
	case PCM512x_RATE_DET_2:
	case PCM512x_RATE_DET_3:
	case PCM512x_RATE_DET_4:
	case PCM512x_ANALOG_MUTE_DET:
	case PCM512x_GPIN:
	case PCM512x_DIGITAL_MUTE_DET:
	case PCM512x_OUTPUT_AMPLITUDE:
	case PCM512x_ANALOG_GAIN_CTRL:
	case PCM512x_UNDERVOLTAGE_PROT:
	case PCM512x_ANALOG_MUTE_CTRL:
	case PCM512x_ANALOG_GAIN_BOOST:
	case PCM512x_VCOM_CTRL_1:
	case PCM512x_VCOM_CTRL_2:
	case PCM512x_CRAM_CTRL:
		return true;
	default:
		/* There are 256 raw register addresses */
		return reg < 0xff;
	}
}

static bool pcm512x_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case PCM512x_PLL_EN:
	case PCM512x_OVERFLOW:
	case PCM512x_RATE_DET_1:
	case PCM512x_RATE_DET_2:
	case PCM512x_RATE_DET_3:
	case PCM512x_RATE_DET_4:
	case PCM512x_ANALOG_MUTE_DET:
	case PCM512x_GPIN:
	case PCM512x_DIGITAL_MUTE_DET:
	case PCM512x_CRAM_CTRL:
		return true;
	default:
		/* There are 256 raw register addresses */
		return reg < 0xff;
	}
}

static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0);
static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0);

static const char * const pcm512x_dsp_program_texts[] = {
	"FIR interpolation with de-emphasis",
	"Low latency IIR with de-emphasis",
	"Fixed process flow",
	"High attenuation with de-emphasis",
	"Ringing-less low latency FIR",
};

static const unsigned int pcm512x_dsp_program_values[] = {
	1,
	2,
	3,
	5,
	7,
};

static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
				  PCM512x_DSP_PROGRAM, 0, 0x1f,
				  pcm512x_dsp_program_texts,
				  pcm512x_dsp_program_values);

static const char * const pcm512x_clk_missing_text[] = {
	"1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
};

static const struct soc_enum pcm512x_clk_missing =
	SOC_ENUM_SINGLE(PCM512x_CLKDET, 0,  8, pcm512x_clk_missing_text);

static const char * const pcm512x_autom_text[] = {
	"21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
};

static const struct soc_enum pcm512x_autom_l =
	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8,
			pcm512x_autom_text);

static const struct soc_enum pcm512x_autom_r =
	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8,
			pcm512x_autom_text);

static const char * const pcm512x_ramp_rate_text[] = {
	"1 sample/update", "2 samples/update", "4 samples/update",
	"Immediate"
};

static const struct soc_enum pcm512x_vndf =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
			pcm512x_ramp_rate_text);

static const struct soc_enum pcm512x_vnuf =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
			pcm512x_ramp_rate_text);

static const struct soc_enum pcm512x_vedf =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
			pcm512x_ramp_rate_text);

static const char * const pcm512x_ramp_step_text[] = {
	"4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
};

static const struct soc_enum pcm512x_vnds =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
			pcm512x_ramp_step_text);

static const struct soc_enum pcm512x_vnus =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
			pcm512x_ramp_step_text);

static const struct soc_enum pcm512x_veds =
	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
			pcm512x_ramp_step_text);

static const struct snd_kcontrol_new pcm512x_controls[] = {
SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2,
		 PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
SOC_DOUBLE_TLV("Playback Volume", PCM512x_ANALOG_GAIN_CTRL,
	       PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
SOC_DOUBLE_TLV("Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
	       PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
	   PCM512x_RQMR_SHIFT, 1, 1),

SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
SOC_ENUM("DSP Program", pcm512x_dsp_program),

SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
	   PCM512x_ACTL_SHIFT, 1, 0),
SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
	   PCM512x_AMRE_SHIFT, 1, 0),

SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
};

static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),

SND_SOC_DAPM_OUTPUT("OUTL"),
SND_SOC_DAPM_OUTPUT("OUTR"),
};

static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
	{ "DACL", NULL, "Playback" },
	{ "DACR", NULL, "Playback" },

	{ "OUTL", NULL, "DACL" },
	{ "OUTR", NULL, "DACR" },
};

static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
				  enum snd_soc_bias_level level)
{
	struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
	int ret;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
		break;

	case SND_SOC_BIAS_STANDBY:
		ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
					 PCM512x_RQST, 0);
		if (ret != 0) {
			dev_err(codec->dev, "Failed to remove standby: %d\n",
				ret);
			return ret;
		}
		break;

	case SND_SOC_BIAS_OFF:
		ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
					 PCM512x_RQST, PCM512x_RQST);
		if (ret != 0) {
			dev_err(codec->dev, "Failed to request standby: %d\n",
				ret);
			return ret;
		}
		break;
	}

	codec->dapm.bias_level = level;

	return 0;
}

static struct snd_soc_dai_driver pcm512x_dai = {
	.name = "pcm512x-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE |
			   SNDRV_PCM_FMTBIT_S24_LE |
			   SNDRV_PCM_FMTBIT_S32_LE
	},
};

static struct snd_soc_codec_driver pcm512x_codec_driver = {
	.set_bias_level = pcm512x_set_bias_level,
	.idle_bias_off = true,

	.controls = pcm512x_controls,
	.num_controls = ARRAY_SIZE(pcm512x_controls),
	.dapm_widgets = pcm512x_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
	.dapm_routes = pcm512x_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
};

static const struct regmap_range_cfg pcm512x_range = {
	.name = "Pages", .range_min = PCM512x_VIRT_BASE,
	.range_max = PCM512x_MAX_REGISTER,
	.selector_reg = PCM512x_PAGE,
	.selector_mask = 0xff,
	.window_start = 0, .window_len = 0x100,
};

const struct regmap_config pcm512x_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.readable_reg = pcm512x_readable,
	.volatile_reg = pcm512x_volatile,

	.ranges = &pcm512x_range,
	.num_ranges = 1,

	.max_register = PCM512x_MAX_REGISTER,
	.reg_defaults = pcm512x_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
};
EXPORT_SYMBOL_GPL(pcm512x_regmap);

int pcm512x_probe(struct device *dev, struct regmap *regmap)
{
	struct pcm512x_priv *pcm512x;
	int i, ret;

	pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
	if (!pcm512x)
		return -ENOMEM;

	dev_set_drvdata(dev, pcm512x);
	pcm512x->regmap = regmap;

	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
		pcm512x->supplies[i].supply = pcm512x_supply_names[i];

	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
				      pcm512x->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to get supplies: %d\n", ret);
		return ret;
	}

	pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
	pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
	pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;

	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
		ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
						  &pcm512x->supply_nb[i]);
		if (ret != 0) {
			dev_err(dev,
				"Failed to register regulator notifier: %d\n",
				ret);
		}
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
				    pcm512x->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	/* Reset the device, verifying I/O in the process for I2C */
	ret = regmap_write(regmap, PCM512x_RESET,
			   PCM512x_RSTM | PCM512x_RSTR);
	if (ret != 0) {
		dev_err(dev, "Failed to reset device: %d\n", ret);
		goto err;
	}

	ret = regmap_write(regmap, PCM512x_RESET, 0);
	if (ret != 0) {
		dev_err(dev, "Failed to reset device: %d\n", ret);
		goto err;
	}

	pcm512x->sclk = devm_clk_get(dev, NULL);
	if (IS_ERR(pcm512x->sclk)) {
		if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
			return -EPROBE_DEFER;

		dev_info(dev, "No SCLK, using BCLK: %ld\n",
			 PTR_ERR(pcm512x->sclk));

		/* Disable reporting of missing SCLK as an error */
		regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
				   PCM512x_IDCH, PCM512x_IDCH);

		/* Switch PLL input to BCLK */
		regmap_update_bits(regmap, PCM512x_PLL_REF,
				   PCM512x_SREF, PCM512x_SREF);
	} else {
		ret = clk_prepare_enable(pcm512x->sclk);
		if (ret != 0) {
			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
			return ret;
		}
	}

	/* Default to standby mode */
	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
				 PCM512x_RQST, PCM512x_RQST);
	if (ret != 0) {
		dev_err(dev, "Failed to request standby: %d\n",
			ret);
		goto err_clk;
	}

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	pm_runtime_idle(dev);

	ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
				    &pcm512x_dai, 1);
	if (ret != 0) {
		dev_err(dev, "Failed to register CODEC: %d\n", ret);
		goto err_pm;
	}

	return 0;

err_pm:
	pm_runtime_disable(dev);
err_clk:
	if (!IS_ERR(pcm512x->sclk))
		clk_disable_unprepare(pcm512x->sclk);
err:
	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
				     pcm512x->supplies);
	return ret;
}
EXPORT_SYMBOL_GPL(pcm512x_probe);

void pcm512x_remove(struct device *dev)
{
	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);

	snd_soc_unregister_codec(dev);
	pm_runtime_disable(dev);
	if (!IS_ERR(pcm512x->sclk))
		clk_disable_unprepare(pcm512x->sclk);
	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
			       pcm512x->supplies);
}
EXPORT_SYMBOL_GPL(pcm512x_remove);

#ifdef CONFIG_PM
static int pcm512x_suspend(struct device *dev)
{
	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
	int ret;

	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
				 PCM512x_RQPD, PCM512x_RQPD);
	if (ret != 0) {
		dev_err(dev, "Failed to request power down: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
				     pcm512x->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to disable supplies: %d\n", ret);
		return ret;
	}

	if (!IS_ERR(pcm512x->sclk))
		clk_disable_unprepare(pcm512x->sclk);

	return 0;
}

static int pcm512x_resume(struct device *dev)
{
	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
	int ret;

	if (!IS_ERR(pcm512x->sclk)) {
		ret = clk_prepare_enable(pcm512x->sclk);
		if (ret != 0) {
			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
			return ret;
		}
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
				    pcm512x->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	regcache_cache_only(pcm512x->regmap, false);
	ret = regcache_sync(pcm512x->regmap);
	if (ret != 0) {
		dev_err(dev, "Failed to sync cache: %d\n", ret);
		return ret;
	}

	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
				 PCM512x_RQPD, 0);
	if (ret != 0) {
		dev_err(dev, "Failed to remove power down: %d\n", ret);
		return ret;
	}

	return 0;
}
#endif

const struct dev_pm_ops pcm512x_pm_ops = {
	SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
};
EXPORT_SYMBOL_GPL(pcm512x_pm_ops);

MODULE_DESCRIPTION("ASoC PCM512x codec driver");
MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
5a3af129 MB	1	/*
	2	* Driver for the PCM512x CODECs
	3	*
	4	* Author: Mark Brown <broonie@linaro.org>
	5	* Copyright 2014 Linaro Ltd
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* version 2 as published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*/
	16
	17
	18	#include <linux/init.h>
	19	#include <linux/module.h>
	20	#include <linux/clk.h>
5a3af129 MB	21	#include <linux/pm_runtime.h>
	22	#include <linux/regmap.h>
	23	#include <linux/regulator/consumer.h>
5a3af129 MB	24	#include <sound/soc.h>
	25	#include <sound/soc-dapm.h>
	26	#include <sound/tlv.h>
	27
	28	#include "pcm512x.h"
	29
	30	#define PCM512x_NUM_SUPPLIES 3
06d0ffcc	31	static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
5a3af129 MB	32	"AVDD",
	33	"DVDD",
	34	"CPVDD",
	35	};
	36
	37	struct pcm512x_priv {
	38	struct regmap *regmap;
	39	struct clk *sclk;
	40	struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
	41	struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
	42	};
	43
	44	/*
	45	* We can't use the same notifier block for more than one supply and
	46	* there's no way I can see to get from a callback to the caller
	47	* except container_of().
	48	*/
	49	#define PCM512x_REGULATOR_EVENT(n) \
	50	static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
	51	unsigned long event, void *data) \
	52	{ \
	53	struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
	54	supply_nb[n]); \
	55	if (event & REGULATOR_EVENT_DISABLE) { \
	56	regcache_mark_dirty(pcm512x->regmap); \
	57	regcache_cache_only(pcm512x->regmap, true); \
	58	} \
	59	return 0; \
	60	}
	61
	62	PCM512x_REGULATOR_EVENT(0)
	63	PCM512x_REGULATOR_EVENT(1)
	64	PCM512x_REGULATOR_EVENT(2)
	65
	66	static const struct reg_default pcm512x_reg_defaults[] = {
806d6466 MB	67	{ PCM512x_RESET, 0x00 },
	68	{ PCM512x_POWER, 0x00 },
	69	{ PCM512x_MUTE, 0x00 },
	70	{ PCM512x_DSP, 0x00 },
	71	{ PCM512x_PLL_REF, 0x00 },
	72	{ PCM512x_DAC_ROUTING, 0x11 },
	73	{ PCM512x_DSP_PROGRAM, 0x01 },
	74	{ PCM512x_CLKDET, 0x00 },
	75	{ PCM512x_AUTO_MUTE, 0x00 },
	76	{ PCM512x_ERROR_DETECT, 0x00 },
	77	{ PCM512x_DIGITAL_VOLUME_1, 0x00 },
	78	{ PCM512x_DIGITAL_VOLUME_2, 0x30 },
	79	{ PCM512x_DIGITAL_VOLUME_3, 0x30 },
	80	{ PCM512x_DIGITAL_MUTE_1, 0x22 },
	81	{ PCM512x_DIGITAL_MUTE_2, 0x00 },
	82	{ PCM512x_DIGITAL_MUTE_3, 0x07 },
	83	{ PCM512x_OUTPUT_AMPLITUDE, 0x00 },
	84	{ PCM512x_ANALOG_GAIN_CTRL, 0x00 },
	85	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
	86	{ PCM512x_ANALOG_MUTE_CTRL, 0x00 },
	87	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
	88	{ PCM512x_VCOM_CTRL_1, 0x00 },
	89	{ PCM512x_VCOM_CTRL_2, 0x01 },
5a3af129 MB	90	};
	91
	92	static bool pcm512x_readable(struct device *dev, unsigned int reg)
	93	{
	94	switch (reg) {
	95	case PCM512x_RESET:
	96	case PCM512x_POWER:
	97	case PCM512x_MUTE:
	98	case PCM512x_PLL_EN:
	99	case PCM512x_SPI_MISO_FUNCTION:
	100	case PCM512x_DSP:
	101	case PCM512x_GPIO_EN:
	102	case PCM512x_BCLK_LRCLK_CFG:
	103	case PCM512x_DSP_GPIO_INPUT:
	104	case PCM512x_MASTER_MODE:
	105	case PCM512x_PLL_REF:
	106	case PCM512x_PLL_COEFF_0:
	107	case PCM512x_PLL_COEFF_1:
	108	case PCM512x_PLL_COEFF_2:
	109	case PCM512x_PLL_COEFF_3:
	110	case PCM512x_PLL_COEFF_4:
	111	case PCM512x_DSP_CLKDIV:
	112	case PCM512x_DAC_CLKDIV:
	113	case PCM512x_NCP_CLKDIV:
	114	case PCM512x_OSR_CLKDIV:
	115	case PCM512x_MASTER_CLKDIV_1:
	116	case PCM512x_MASTER_CLKDIV_2:
	117	case PCM512x_FS_SPEED_MODE:
	118	case PCM512x_IDAC_1:
	119	case PCM512x_IDAC_2:
	120	case PCM512x_ERROR_DETECT:
	121	case PCM512x_I2S_1:
	122	case PCM512x_I2S_2:
	123	case PCM512x_DAC_ROUTING:
	124	case PCM512x_DSP_PROGRAM:
	125	case PCM512x_CLKDET:
	126	case PCM512x_AUTO_MUTE:
	127	case PCM512x_DIGITAL_VOLUME_1:
	128	case PCM512x_DIGITAL_VOLUME_2:
	129	case PCM512x_DIGITAL_VOLUME_3:
	130	case PCM512x_DIGITAL_MUTE_1:
	131	case PCM512x_DIGITAL_MUTE_2:
	132	case PCM512x_DIGITAL_MUTE_3:
	133	case PCM512x_GPIO_OUTPUT_1:
	134	case PCM512x_GPIO_OUTPUT_2:
	135	case PCM512x_GPIO_OUTPUT_3:
	136	case PCM512x_GPIO_OUTPUT_4:
	137	case PCM512x_GPIO_OUTPUT_5:
	138	case PCM512x_GPIO_OUTPUT_6:
	139	case PCM512x_GPIO_CONTROL_1:
	140	case PCM512x_GPIO_CONTROL_2:
	141	case PCM512x_OVERFLOW:
	142	case PCM512x_RATE_DET_1:
	143	case PCM512x_RATE_DET_2:
	144	case PCM512x_RATE_DET_3:
	145	case PCM512x_RATE_DET_4:
	146	case PCM512x_ANALOG_MUTE_DET:
	147	case PCM512x_GPIN:
	148	case PCM512x_DIGITAL_MUTE_DET:
806d6466 MB	149	case PCM512x_OUTPUT_AMPLITUDE:
	150	case PCM512x_ANALOG_GAIN_CTRL:
	151	case PCM512x_UNDERVOLTAGE_PROT:
	152	case PCM512x_ANALOG_MUTE_CTRL:
	153	case PCM512x_ANALOG_GAIN_BOOST:
	154	case PCM512x_VCOM_CTRL_1:
	155	case PCM512x_VCOM_CTRL_2:
	156	case PCM512x_CRAM_CTRL:
5a3af129 MB	157	return true;
5a3af129 MB	158	default:
806d6466 MB	159	/* There are 256 raw register addresses */
806d6466 MB	160	return reg < 0xff;
5a3af129 MB	161	}
	162	}
	163
	164	static bool pcm512x_volatile(struct device *dev, unsigned int reg)
	165	{
	166	switch (reg) {
	167	case PCM512x_PLL_EN:
	168	case PCM512x_OVERFLOW:
	169	case PCM512x_RATE_DET_1:
	170	case PCM512x_RATE_DET_2:
	171	case PCM512x_RATE_DET_3:
	172	case PCM512x_RATE_DET_4:
	173	case PCM512x_ANALOG_MUTE_DET:
	174	case PCM512x_GPIN:
	175	case PCM512x_DIGITAL_MUTE_DET:
806d6466	176	case PCM512x_CRAM_CTRL:
5a3af129 MB	177	return true;
5a3af129 MB	178	default:
806d6466 MB	179	/* There are 256 raw register addresses */
806d6466 MB	180	return reg < 0xff;
5a3af129 MB	181	}
	182	}
	183
	184	static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
5be2fc20 MB	185	static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0);
5be2fc20 MB	186	static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0);
5a3af129	187
06d0ffcc	188	static const char * const pcm512x_dsp_program_texts[] = {
5a3af129 MB	189	"FIR interpolation with de-emphasis",
	190	"Low latency IIR with de-emphasis",
	191	"Fixed process flow",
	192	"High attenuation with de-emphasis",
	193	"Ringing-less low latency FIR",
	194	};
	195
	196	static const unsigned int pcm512x_dsp_program_values[] = {
	197	1,
	198	2,
	199	3,
	200	5,
	201	7,
	202	};
	203
e97db9ab MB	204	static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
	205	PCM512x_DSP_PROGRAM, 0, 0x1f,
	206	pcm512x_dsp_program_texts,
	207	pcm512x_dsp_program_values);
5a3af129	208
06d0ffcc	209	static const char * const pcm512x_clk_missing_text[] = {
5a3af129 MB	210	"1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
	211	};
	212
	213	static const struct soc_enum pcm512x_clk_missing =
	214	SOC_ENUM_SINGLE(PCM512x_CLKDET, 0, 8, pcm512x_clk_missing_text);
	215
06d0ffcc	216	static const char * const pcm512x_autom_text[] = {
5a3af129 MB	217	"21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
	218	};
	219
	220	static const struct soc_enum pcm512x_autom_l =
	221	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8,
	222	pcm512x_autom_text);
	223
	224	static const struct soc_enum pcm512x_autom_r =
	225	SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8,
	226	pcm512x_autom_text);
	227
06d0ffcc	228	static const char * const pcm512x_ramp_rate_text[] = {
5a3af129 MB	229	"1 sample/update", "2 samples/update", "4 samples/update",
	230	"Immediate"
	231	};
	232
	233	static const struct soc_enum pcm512x_vndf =
	234	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
	235	pcm512x_ramp_rate_text);
	236
	237	static const struct soc_enum pcm512x_vnuf =
	238	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
	239	pcm512x_ramp_rate_text);
	240
	241	static const struct soc_enum pcm512x_vedf =
	242	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
	243	pcm512x_ramp_rate_text);
	244
06d0ffcc	245	static const char * const pcm512x_ramp_step_text[] = {
5a3af129 MB	246	"4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
	247	};
	248
	249	static const struct soc_enum pcm512x_vnds =
	250	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
	251	pcm512x_ramp_step_text);
	252
	253	static const struct soc_enum pcm512x_vnus =
	254	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
	255	pcm512x_ramp_step_text);
	256
	257	static const struct soc_enum pcm512x_veds =
	258	SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
	259	pcm512x_ramp_step_text);
	260
	261	static const struct snd_kcontrol_new pcm512x_controls[] = {
1c6d3680	262	SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2,
5a3af129	263	PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
5be2fc20 MB	264	SOC_DOUBLE_TLV("Playback Volume", PCM512x_ANALOG_GAIN_CTRL,
	265	PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
	266	SOC_DOUBLE_TLV("Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
	267	PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
1c6d3680	268	SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
5a3af129 MB	269	PCM512x_RQMR_SHIFT, 1, 1),
	270
	271	SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
54581be7	272	SOC_ENUM("DSP Program", pcm512x_dsp_program),
5a3af129 MB	273
	274	SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
	275	SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
	276	SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
	277	SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
	278	PCM512x_ACTL_SHIFT, 1, 0),
	279	SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
376dc490	280	PCM512x_AMRE_SHIFT, 1, 0),
5a3af129 MB	281
	282	SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
	283	SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
	284	SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
	285	SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
	286	SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
	287	SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
	288	};
	289
	290	static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
	291	SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
	292	SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
	293
	294	SND_SOC_DAPM_OUTPUT("OUTL"),
	295	SND_SOC_DAPM_OUTPUT("OUTR"),
	296	};
	297
	298	static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
	299	{ "DACL", NULL, "Playback" },
	300	{ "DACR", NULL, "Playback" },
	301
	302	{ "OUTL", NULL, "DACL" },
	303	{ "OUTR", NULL, "DACR" },
	304	};
	305
	306	static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
	307	enum snd_soc_bias_level level)
	308	{
	309	struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
	310	int ret;
	311
	312	switch (level) {
	313	case SND_SOC_BIAS_ON:
	314	case SND_SOC_BIAS_PREPARE:
	315	break;
	316
	317	case SND_SOC_BIAS_STANDBY:
	318	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
	319	PCM512x_RQST, 0);
	320	if (ret != 0) {
	321	dev_err(codec->dev, "Failed to remove standby: %d\n",
	322	ret);
	323	return ret;
	324	}
	325	break;
	326
	327	case SND_SOC_BIAS_OFF:
	328	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
	329	PCM512x_RQST, PCM512x_RQST);
	330	if (ret != 0) {
	331	dev_err(codec->dev, "Failed to request standby: %d\n",
	332	ret);
	333	return ret;
	334	}
	335	break;
	336	}
	337
	338	codec->dapm.bias_level = level;
	339
	340	return 0;
	341	}
	342
	343	static struct snd_soc_dai_driver pcm512x_dai = {
	344	.name = "pcm512x-hifi",
345	.playback = {
346	.stream_name = "Playback",
347	.channels_min = 2,
348	.channels_max = 2,
349	.rates = SNDRV_PCM_RATE_8000_192000,
350	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
351	SNDRV_PCM_FMTBIT_S24_LE \|
352	SNDRV_PCM_FMTBIT_S32_LE
353	},
354	};
355
356	static struct snd_soc_codec_driver pcm512x_codec_driver = {
357	.set_bias_level = pcm512x_set_bias_level,
358	.idle_bias_off = true,
359
360	.controls = pcm512x_controls,
361	.num_controls = ARRAY_SIZE(pcm512x_controls),
362	.dapm_widgets = pcm512x_dapm_widgets,
363	.num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
364	.dapm_routes = pcm512x_dapm_routes,
365	.num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
366	};
367
806d6466 MB	368	static const struct regmap_range_cfg pcm512x_range = {
	369	.name = "Pages", .range_min = PCM512x_VIRT_BASE,
	370	.range_max = PCM512x_MAX_REGISTER,
	371	.selector_reg = PCM512x_PAGE,
	372	.selector_mask = 0xff,
	373	.window_start = 0, .window_len = 0x100,
	374	};
	375
22066226	376	const struct regmap_config pcm512x_regmap = {
5a3af129 MB	377	.reg_bits = 8,
	378	.val_bits = 8,
	379
	380	.readable_reg = pcm512x_readable,
	381	.volatile_reg = pcm512x_volatile,
	382
806d6466 MB	383	.ranges = &pcm512x_range,
	384	.num_ranges = 1,
	385
5a3af129 MB	386	.max_register = PCM512x_MAX_REGISTER,
	387	.reg_defaults = pcm512x_reg_defaults,
	388	.num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
	389	.cache_type = REGCACHE_RBTREE,
	390	};
22066226	391	EXPORT_SYMBOL_GPL(pcm512x_regmap);
5a3af129	392
22066226	393	int pcm512x_probe(struct device dev, struct regmap regmap)
5a3af129 MB	394	{
	395	struct pcm512x_priv *pcm512x;
	396	int i, ret;
	397
	398	pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
	399	if (!pcm512x)
	400	return -ENOMEM;
	401
	402	dev_set_drvdata(dev, pcm512x);
	403	pcm512x->regmap = regmap;
	404
	405	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
	406	pcm512x->supplies[i].supply = pcm512x_supply_names[i];
	407
	408	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
	409	pcm512x->supplies);
	410	if (ret != 0) {
	411	dev_err(dev, "Failed to get supplies: %d\n", ret);
	412	return ret;
	413	}
	414
	415	pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
	416	pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
	417	pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;
	418
	419	for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
	420	ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
	421	&pcm512x->supply_nb[i]);
	422	if (ret != 0) {
	423	dev_err(dev,
	424	"Failed to register regulator notifier: %d\n",
	425	ret);
	426	}
	427	}
	428
	429	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
	430	pcm512x->supplies);
	431	if (ret != 0) {
	432	dev_err(dev, "Failed to enable supplies: %d\n", ret);
	433	return ret;
	434	}
	435
	436	/* Reset the device, verifying I/O in the process for I2C */
	437	ret = regmap_write(regmap, PCM512x_RESET,
	438	PCM512x_RSTM \| PCM512x_RSTR);
	439	if (ret != 0) {
	440	dev_err(dev, "Failed to reset device: %d\n", ret);
	441	goto err;
	442	}
	443
	444	ret = regmap_write(regmap, PCM512x_RESET, 0);
	445	if (ret != 0) {
	446	dev_err(dev, "Failed to reset device: %d\n", ret);
	447	goto err;
	448	}
	449
	450	pcm512x->sclk = devm_clk_get(dev, NULL);
	451	if (IS_ERR(pcm512x->sclk)) {
	452	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
	453	return -EPROBE_DEFER;
	454
	455	dev_info(dev, "No SCLK, using BCLK: %ld\n",
	456	PTR_ERR(pcm512x->sclk));
	457
458	/* Disable reporting of missing SCLK as an error */
459	regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
460	PCM512x_IDCH, PCM512x_IDCH);
461
462	/* Switch PLL input to BCLK */
463	regmap_update_bits(regmap, PCM512x_PLL_REF,
464	PCM512x_SREF, PCM512x_SREF);
465	} else {
466	ret = clk_prepare_enable(pcm512x->sclk);
467	if (ret != 0) {
468	dev_err(dev, "Failed to enable SCLK: %d\n", ret);
469	return ret;
470	}
471	}
472
473	/* Default to standby mode */
474	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
475	PCM512x_RQST, PCM512x_RQST);
476	if (ret != 0) {
477	dev_err(dev, "Failed to request standby: %d\n",
478	ret);
479	goto err_clk;
480	}
481
482	pm_runtime_set_active(dev);
483	pm_runtime_enable(dev);
484	pm_runtime_idle(dev);
485
486	ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
487	&pcm512x_dai, 1);
488	if (ret != 0) {
489	dev_err(dev, "Failed to register CODEC: %d\n", ret);
490	goto err_pm;
491	}
492
493	return 0;
494
495	err_pm:
496	pm_runtime_disable(dev);
497	err_clk:
498	if (!IS_ERR(pcm512x->sclk))
499	clk_disable_unprepare(pcm512x->sclk);
500	err:
501	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
502	pcm512x->supplies);
503	return ret;
504	}
22066226	505	EXPORT_SYMBOL_GPL(pcm512x_probe);
5a3af129	506
22066226	507	void pcm512x_remove(struct device *dev)
5a3af129 MB	508	{
	509	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
	510
	511	snd_soc_unregister_codec(dev);
	512	pm_runtime_disable(dev);
	513	if (!IS_ERR(pcm512x->sclk))
	514	clk_disable_unprepare(pcm512x->sclk);
	515	regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
	516	pcm512x->supplies);
	517	}
22066226	518	EXPORT_SYMBOL_GPL(pcm512x_remove);
5a3af129	519
641d334b	520	#ifdef CONFIG_PM
5a3af129 MB	521	static int pcm512x_suspend(struct device *dev)
	522	{
	523	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
	524	int ret;
	525
	526	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
	527	PCM512x_RQPD, PCM512x_RQPD);
	528	if (ret != 0) {
	529	dev_err(dev, "Failed to request power down: %d\n", ret);
	530	return ret;
	531	}
	532
	533	ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
	534	pcm512x->supplies);
	535	if (ret != 0) {
	536	dev_err(dev, "Failed to disable supplies: %d\n", ret);
	537	return ret;
	538	}
	539
	540	if (!IS_ERR(pcm512x->sclk))
	541	clk_disable_unprepare(pcm512x->sclk);
	542
	543	return 0;
	544	}
	545
	546	static int pcm512x_resume(struct device *dev)
	547	{
	548	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
	549	int ret;
	550
	551	if (!IS_ERR(pcm512x->sclk)) {
	552	ret = clk_prepare_enable(pcm512x->sclk);
	553	if (ret != 0) {
	554	dev_err(dev, "Failed to enable SCLK: %d\n", ret);
	555	return ret;
	556	}
	557	}
	558
	559	ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
	560	pcm512x->supplies);
	561	if (ret != 0) {
	562	dev_err(dev, "Failed to enable supplies: %d\n", ret);
	563	return ret;
	564	}
	565
	566	regcache_cache_only(pcm512x->regmap, false);
	567	ret = regcache_sync(pcm512x->regmap);
	568	if (ret != 0) {
	569	dev_err(dev, "Failed to sync cache: %d\n", ret);
	570	return ret;
	571	}
	572
	573	ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
	574	PCM512x_RQPD, 0);
	575	if (ret != 0) {
	576	dev_err(dev, "Failed to remove power down: %d\n", ret);
	577	return ret;
	578	}
	579
	580	return 0;
	581	}
ccffbd27	582	#endif
5a3af129	583
22066226	584	const struct dev_pm_ops pcm512x_pm_ops = {
5a3af129 MB	585	SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
5a3af129 MB	586	};
22066226	587	EXPORT_SYMBOL_GPL(pcm512x_pm_ops);
5a3af129 MB	588
	589	MODULE_DESCRIPTION("ASoC PCM512x codec driver");
	590	MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
	591	MODULE_LICENSE("GPL v2");