[mirror_ubuntu-bionic-kernel.git] / sound / soc / codecs / tpa6130a2.c

/*
 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
 *
 * Copyright (C) Nokia Corporation
 *
 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/tpa6130a2-plat.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>

#include "tpa6130a2.h"

enum tpa_model {
	TPA6130A2,
	TPA6140A2,
};

/* This struct is used to save the context */
struct tpa6130a2_data {
	struct device *dev;
	struct regmap *regmap;
	struct regulator *supply;
	int power_gpio;
	enum tpa_model id;
};

static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable)
{
	int ret = 0, ret2;

	if (enable) {
		ret = regulator_enable(data->supply);
		if (ret != 0) {
			dev_err(data->dev,
				"Failed to enable supply: %d\n", ret);
			return ret;
		}
		/* Power on */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 1);

		/* Sync registers */
		regcache_cache_only(data->regmap, false);
		ret = regcache_sync(data->regmap);
		if (ret != 0) {
			dev_err(data->dev,
				"Failed to sync registers: %d\n", ret);
			regcache_cache_only(data->regmap, true);
			if (data->power_gpio >= 0)
				gpio_set_value(data->power_gpio, 0);
			ret2 = regulator_disable(data->supply);
			if (ret2 != 0)
				dev_err(data->dev,
					"Failed to disable supply: %d\n", ret2);
			return ret;
		}
	} else {
		/* Powered off device does not retain registers. While device
		 * is off, any register updates (i.e. volume changes) should
		 * happen in cache only.
		 */
		regcache_mark_dirty(data->regmap);
		regcache_cache_only(data->regmap, true);

		/* Power off */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 0);

		ret = regulator_disable(data->supply);
		if (ret != 0) {
			dev_err(data->dev,
				"Failed to disable supply: %d\n", ret);
			return ret;
		}
	}

	return ret;
}

static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w,
				 struct snd_kcontrol *kctrl, int event)
{
	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
	struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c);

	if (SND_SOC_DAPM_EVENT_ON(event)) {
		/* Before widget power up: turn chip on, sync registers */
		return tpa6130a2_power(data, true);
	} else {
		/* After widget power down: turn chip off */
		return tpa6130a2_power(data, false);
	}
}

/*
 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
 * down in gain.
 */
static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)
);

static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	SOC_SINGLE_TLV("Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
		       tpa6130_tlv),
};

static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)
);

static const struct snd_kcontrol_new tpa6140a2_controls[] = {
	SOC_SINGLE_TLV("Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
		       tpa6140_tlv),
};

static int tpa6130a2_component_probe(struct snd_soc_component *component)
{
	struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);

	if (data->id == TPA6140A2)
		return snd_soc_add_component_controls(component,
			tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));
	else
		return snd_soc_add_component_controls(component,
			tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));
}

static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("LEFTIN"),
	SND_SOC_DAPM_INPUT("RIGHTIN"),
	SND_SOC_DAPM_OUTPUT("HPLEFT"),
	SND_SOC_DAPM_OUTPUT("HPRIGHT"),

	SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE,
			 TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE,
			 TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL,
			 TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL,
			 TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0),

	SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL,
			    TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event,
			    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = {
	{ "Left PGA", NULL, "LEFTIN" },
	{ "Right PGA", NULL, "RIGHTIN" },

	{ "Left Mute", NULL, "Left PGA" },
	{ "Right Mute", NULL, "Right PGA" },

	{ "HPLEFT", NULL, "Left Mute" },
	{ "HPRIGHT", NULL, "Right Mute" },

	{ "Left PGA", NULL, "Power" },
	{ "Right PGA", NULL, "Power" },
};

static const struct snd_soc_component_driver tpa6130a2_component_driver = {
	.name = "tpa6130a2",
	.probe = tpa6130a2_component_probe,
	.dapm_widgets = tpa6130a2_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets),
	.dapm_routes = tpa6130a2_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes),
};

static const struct reg_default tpa6130a2_reg_defaults[] = {
	{ TPA6130A2_REG_CONTROL, TPA6130A2_SWS },
	{ TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L },
};

static const struct regmap_config tpa6130a2_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TPA6130A2_REG_VERSION,
	.reg_defaults = tpa6130a2_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
};

static int tpa6130a2_probe(struct i2c_client *client,
			   const struct i2c_device_id *id)
{
	struct device *dev;
	struct tpa6130a2_data *data;
	struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
	struct device_node *np = client->dev.of_node;
	const char *regulator;
	unsigned int version;
	int ret;

	dev = &client->dev;

	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->dev = dev;

	data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);
	if (IS_ERR(data->regmap))
		return PTR_ERR(data->regmap);

	if (pdata) {
		data->power_gpio = pdata->power_gpio;
	} else if (np) {
		data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
	} else {
		dev_err(dev, "Platform data not set\n");
		dump_stack();
		return -ENODEV;
	}

	i2c_set_clientdata(client, data);

	data->id = id->driver_data;

	if (data->power_gpio >= 0) {
		ret = devm_gpio_request(dev, data->power_gpio,
					"tpa6130a2 enable");
		if (ret < 0) {
			dev_err(dev, "Failed to request power GPIO (%d)\n",
				data->power_gpio);
			return ret;
		}
		gpio_direction_output(data->power_gpio, 0);
	}

	switch (data->id) {
	default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
			 data->id);
	case TPA6130A2:
		regulator = "Vdd";
		break;
	case TPA6140A2:
		regulator = "AVdd";
		break;
	}

	data->supply = devm_regulator_get(dev, regulator);
	if (IS_ERR(data->supply)) {
		ret = PTR_ERR(data->supply);
		dev_err(dev, "Failed to request supply: %d\n", ret);
		return ret;
	}

	ret = tpa6130a2_power(data, true);
	if (ret != 0)
		return ret;


	/* Read version */
	regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);
	version &= TPA6130A2_VERSION_MASK;
	if ((version != 1) && (version != 2))
		dev_warn(dev, "UNTESTED version detected (%d)\n", version);

	/* Disable the chip */
	ret = tpa6130a2_power(data, false);
	if (ret != 0)
		return ret;

	return devm_snd_soc_register_component(&client->dev,
			&tpa6130a2_component_driver, NULL, 0);
}

static const struct i2c_device_id tpa6130a2_id[] = {
	{ "tpa6130a2", TPA6130A2 },
	{ "tpa6140a2", TPA6140A2 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tpa6130a2_of_match[] = {
	{ .compatible = "ti,tpa6130a2", },
	{ .compatible = "ti,tpa6140a2" },
	{},
};
MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
#endif

static struct i2c_driver tpa6130a2_i2c_driver = {
	.driver = {
		.name = "tpa6130a2",
		.of_match_table = of_match_ptr(tpa6130a2_of_match),
	},
	.probe = tpa6130a2_probe,
	.id_table = tpa6130a2_id,
};

module_i2c_driver(tpa6130a2_i2c_driver);

MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
493b67ef PU	1	/*
	2	* ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
	3	*
	4	* Copyright (C) Nokia Corporation
	5	*
b4079ef4	6	* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
493b67ef PU	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/errno.h>
	25	#include <linux/device.h>
	26	#include <linux/i2c.h>
	27	#include <linux/gpio.h>
7c4e6492	28	#include <linux/regulator/consumer.h>
5a0e3ad6	29	#include <linux/slab.h>
493b67ef PU	30	#include <sound/tpa6130a2-plat.h>
493b67ef PU	31	#include <sound/soc.h>
493b67ef	32	#include <sound/tlv.h>
ee5e4534	33	#include <linux/of.h>
f95a4883	34	#include <linux/of_gpio.h>
a0d5ff44	35	#include <linux/regmap.h>
493b67ef PU	36
	37	#include "tpa6130a2.h"
	38
0722d055 PU	39	enum tpa_model {
	40	TPA6130A2,
	41	TPA6140A2,
	42	};
	43
493b67ef PU	44	/* This struct is used to save the context */
493b67ef PU	45	struct tpa6130a2_data {
6d2de5ab	46	struct device *dev;
a0d5ff44	47	struct regmap *regmap;
ad8332c1	48	struct regulator *supply;
493b67ef	49	int power_gpio;
e5e5b31e	50	enum tpa_model id;
493b67ef PU	51	};
493b67ef PU	52
6d2de5ab	53	static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable)
493b67ef	54	{
a114580f	55	int ret = 0, ret2;
7c4e6492	56
6d2de5ab	57	if (enable) {
ad8332c1	58	ret = regulator_enable(data->supply);
7c4e6492	59	if (ret != 0) {
6d2de5ab	60	dev_err(data->dev,
ad8332c1	61	"Failed to enable supply: %d\n", ret);
6d2de5ab	62	return ret;
493b67ef	63	}
0656f6cf JN	64	/* Power on */
	65	if (data->power_gpio >= 0)
	66	gpio_set_value(data->power_gpio, 1);
a114580f NY	67
	68	/* Sync registers */
	69	regcache_cache_only(data->regmap, false);
	70	ret = regcache_sync(data->regmap);
	71	if (ret != 0) {
	72	dev_err(data->dev,
	73	"Failed to sync registers: %d\n", ret);
020eab35 NY	74	regcache_cache_only(data->regmap, true);
	75	if (data->power_gpio >= 0)
	76	gpio_set_value(data->power_gpio, 0);
	77	ret2 = regulator_disable(data->supply);
	78	if (ret2 != 0)
	79	dev_err(data->dev,
	80	"Failed to disable supply: %d\n", ret2);
	81	return ret;
a114580f	82	}
d5876ce1	83	} else {
a114580f NY	84	/* Powered off device does not retain registers. While device
	85	* is off, any register updates (i.e. volume changes) should
	86	* happen in cache only.
	87	*/
	88	regcache_mark_dirty(data->regmap);
a114580f NY	89	regcache_cache_only(data->regmap, true);
a114580f NY	90
493b67ef	91	/* Power off */
7c4e6492	92	if (data->power_gpio >= 0)
493b67ef	93	gpio_set_value(data->power_gpio, 0);
7c4e6492	94
020eab35 NY	95	ret = regulator_disable(data->supply);
020eab35 NY	96	if (ret != 0) {
6d2de5ab	97	dev_err(data->dev,
020eab35 NY	98	"Failed to disable supply: %d\n", ret);
020eab35 NY	99	return ret;
493b67ef PU	100	}
493b67ef PU	101	}
7c4e6492	102
7c4e6492	103	return ret;
493b67ef PU	104	}
493b67ef PU	105
6d2de5ab HK	106	static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w,
	107	struct snd_kcontrol *kctrl, int event)
	108	{
	109	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
	110	struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c);
6d2de5ab	111
6d2de5ab	112	if (SND_SOC_DAPM_EVENT_ON(event)) {
a114580f NY	113	/* Before widget power up: turn chip on, sync registers */
a114580f NY	114	return tpa6130a2_power(data, true);
6d2de5ab	115	} else {
a114580f NY	116	/* After widget power down: turn chip off */
a114580f NY	117	return tpa6130a2_power(data, false);
6d2de5ab	118	}
6d2de5ab HK	119	}
6d2de5ab HK	120
493b67ef PU	121	/*
	122	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	123	* down in gain.
	124	*/
4e0e5f80	125	static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
493b67ef PU	126	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	127	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	128	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	129	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	130	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	131	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	132	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	133	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	134	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
4e0e5f80 LPC	135	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)
4e0e5f80 LPC	136	);
493b67ef PU	137
493b67ef PU	138	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
e01d700c	139	SOC_SINGLE_TLV("Headphone Playback Volume",
493b67ef	140	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
493b67ef PU	141	tpa6130_tlv),
	142	};
	143
4e0e5f80	144	static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
e5e5b31e PU	145	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
e5e5b31e PU	146	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
4e0e5f80 LPC	147	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)
4e0e5f80 LPC	148	);
e5e5b31e PU	149
e5e5b31e PU	150	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
e01d700c	151	SOC_SINGLE_TLV("Headphone Playback Volume",
826e962c	152	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
826e962c	153	tpa6140_tlv),
e5e5b31e PU	154	};
e5e5b31e PU	155
cb7e6225	156	static int tpa6130a2_component_probe(struct snd_soc_component *component)
493b67ef	157	{
cb7e6225	158	struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);
e5e5b31e	159
e5e5b31e	160	if (data->id == TPA6140A2)
cb7e6225 HK	161	return snd_soc_add_component_controls(component,
cb7e6225 HK	162	tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));
e5e5b31e	163	else
cb7e6225 HK	164	return snd_soc_add_component_controls(component,
cb7e6225 HK	165	tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));
493b67ef	166	}
cb7e6225	167
6d2de5ab HK	168	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	169	SND_SOC_DAPM_INPUT("LEFTIN"),
	170	SND_SOC_DAPM_INPUT("RIGHTIN"),
	171	SND_SOC_DAPM_OUTPUT("HPLEFT"),
	172	SND_SOC_DAPM_OUTPUT("HPRIGHT"),
	173
	174	SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE,
	175	TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0),
	176	SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE,
	177	TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0),
	178	SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL,
	179	TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0),
	180	SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL,
	181	TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0),
	182
	183	SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL,
	184	TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event,
	185	SND_SOC_DAPM_PRE_PMU \| SND_SOC_DAPM_POST_PMD),
	186	};
	187
	188	static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = {
	189	{ "Left PGA", NULL, "LEFTIN" },
	190	{ "Right PGA", NULL, "RIGHTIN" },
	191
	192	{ "Left Mute", NULL, "Left PGA" },
	193	{ "Right Mute", NULL, "Right PGA" },
	194
	195	{ "HPLEFT", NULL, "Left Mute" },
	196	{ "HPRIGHT", NULL, "Right Mute" },
	197
	198	{ "Left PGA", NULL, "Power" },
	199	{ "Right PGA", NULL, "Power" },
	200	};
	201
3cadd224	202	static const struct snd_soc_component_driver tpa6130a2_component_driver = {
cb7e6225 HK	203	.name = "tpa6130a2",
cb7e6225 HK	204	.probe = tpa6130a2_component_probe,
6d2de5ab HK	205	.dapm_widgets = tpa6130a2_dapm_widgets,
	206	.num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets),
	207	.dapm_routes = tpa6130a2_dapm_routes,
	208	.num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes),
cb7e6225	209	};
493b67ef	210
a0d5ff44 HK	211	static const struct reg_default tpa6130a2_reg_defaults[] = {
	212	{ TPA6130A2_REG_CONTROL, TPA6130A2_SWS },
	213	{ TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R \| TPA6130A2_MUTE_L },
	214	};
	215
	216	static const struct regmap_config tpa6130a2_regmap_config = {
	217	.reg_bits = 8,
	218	.val_bits = 8,
	219	.max_register = TPA6130A2_REG_VERSION,
	220	.reg_defaults = tpa6130a2_reg_defaults,
	221	.num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),
	222	.cache_type = REGCACHE_RBTREE,
	223	};
	224
7a79e94e BP	225	static int tpa6130a2_probe(struct i2c_client *client,
7a79e94e BP	226	const struct i2c_device_id *id)
493b67ef PU	227	{
	228	struct device *dev;
	229	struct tpa6130a2_data *data;
f95a4883 SR	230	struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
f95a4883 SR	231	struct device_node *np = client->dev.of_node;
ad8332c1	232	const char *regulator;
a0d5ff44	233	unsigned int version;
ad8332c1	234	int ret;
493b67ef PU	235
	236	dev = &client->dev;
	237
6945e9f9	238	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
656e3435	239	if (!data)
493b67ef	240	return -ENOMEM;
493b67ef	241
6d2de5ab HK	242	data->dev = dev;
6d2de5ab HK	243
a0d5ff44 HK	244	data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);
	245	if (IS_ERR(data->regmap))
	246	return PTR_ERR(data->regmap);
	247
f95a4883 SR	248	if (pdata) {
	249	data->power_gpio = pdata->power_gpio;
	250	} else if (np) {
	251	data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
	252	} else {
	253	dev_err(dev, "Platform data not set\n");
	254	dump_stack();
	255	return -ENODEV;
	256	}
	257
6d2de5ab	258	i2c_set_clientdata(client, data);
493b67ef	259
07441006	260	data->id = id->driver_data;
493b67ef	261
493b67ef	262	if (data->power_gpio >= 0) {
d06080cf SK	263	ret = devm_gpio_request(dev, data->power_gpio,
d06080cf SK	264	"tpa6130a2 enable");
493b67ef PU	265	if (ret < 0) {
	266	dev_err(dev, "Failed to request power GPIO (%d)\n",
	267	data->power_gpio);
39088c25	268	return ret;
493b67ef PU	269	}
493b67ef PU	270	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	271	}
493b67ef PU	272
e5e5b31e	273	switch (data->id) {
ad8332c1 JN	274	default:
ad8332c1 JN	275	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
07441006	276	data->id);
2138301e	277	case TPA6130A2:
ad8332c1	278	regulator = "Vdd";
2138301e IK	279	break;
2138301e IK	280	case TPA6140A2:
ad8332c1	281	regulator = "AVdd";
2138301e	282	break;
2138301e	283	}
7c4e6492	284
d06080cf	285	data->supply = devm_regulator_get(dev, regulator);
ad8332c1 JN	286	if (IS_ERR(data->supply)) {
	287	ret = PTR_ERR(data->supply);
	288	dev_err(dev, "Failed to request supply: %d\n", ret);
39088c25	289	return ret;
7c4e6492 IK	290	}
7c4e6492 IK	291
6d2de5ab	292	ret = tpa6130a2_power(data, true);
7c4e6492	293	if (ret != 0)
39088c25	294	return ret;
7c4e6492	295
493b67ef PU	296
493b67ef PU	297	/* Read version */
a0d5ff44 HK	298	regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);
	299	version &= TPA6130A2_VERSION_MASK;
	300	if ((version != 1) && (version != 2))
	301	dev_warn(dev, "UNTESTED version detected (%d)\n", version);
493b67ef PU	302
493b67ef PU	303	/* Disable the chip */
6d2de5ab	304	ret = tpa6130a2_power(data, false);
7c4e6492	305	if (ret != 0)
39088c25	306	return ret;
493b67ef	307
cb7e6225 HK	308	return devm_snd_soc_register_component(&client->dev,
cb7e6225 HK	309	&tpa6130a2_component_driver, NULL, 0);
493b67ef PU	310	}
493b67ef PU	311
493b67ef	312	static const struct i2c_device_id tpa6130a2_id[] = {
07441006 PU	313	{ "tpa6130a2", TPA6130A2 },
07441006 PU	314	{ "tpa6140a2", TPA6140A2 },
493b67ef PU	315	{ }
	316	};
	317	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	318
f95a4883 SR	319	#if IS_ENABLED(CONFIG_OF)
	320	static const struct of_device_id tpa6130a2_of_match[] = {
	321	{ .compatible = "ti,tpa6130a2", },
	322	{ .compatible = "ti,tpa6140a2" },
	323	{},
	324	};
	325	MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
	326	#endif
	327
493b67ef PU	328	static struct i2c_driver tpa6130a2_i2c_driver = {
	329	.driver = {
	330	.name = "tpa6130a2",
f95a4883	331	.of_match_table = of_match_ptr(tpa6130a2_of_match),
493b67ef PU	332	},
493b67ef PU	333	.probe = tpa6130a2_probe,
493b67ef PU	334	.id_table = tpa6130a2_id,
	335	};
	336
f062e2b6	337	module_i2c_driver(tpa6130a2_i2c_driver);
493b67ef	338
b4079ef4	339	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
493b67ef PU	340	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
493b67ef PU	341	MODULE_LICENSE("GPL");