[thirdparty/kernel/stable.git] / drivers / mfd / madera-spi.c

// SPDX-License-Identifier: GPL-2.0
/*
 * SPI bus interface to Cirrus Logic Madera codecs
 *
 * Copyright (C) 2015-2018 Cirrus Logic
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by the
 * Free Software Foundation; version 2.
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>

#include <linux/mfd/madera/core.h>

#include "madera.h"

static int madera_spi_probe(struct spi_device *spi)
{
	const struct spi_device_id *id = spi_get_device_id(spi);
	struct madera *madera;
	const struct regmap_config *regmap_16bit_config = NULL;
	const struct regmap_config *regmap_32bit_config = NULL;
	const void *of_data;
	unsigned long type;
	const char *name;
	int ret;

	of_data = of_device_get_match_data(&spi->dev);
	if (of_data)
		type = (unsigned long)of_data;
	else
		type = id->driver_data;

	switch (type) {
	case CS47L35:
		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
			regmap_16bit_config = &cs47l35_16bit_spi_regmap;
			regmap_32bit_config = &cs47l35_32bit_spi_regmap;
		}
		break;
	case CS47L85:
	case WM1840:
		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
			regmap_16bit_config = &cs47l85_16bit_spi_regmap;
			regmap_32bit_config = &cs47l85_32bit_spi_regmap;
		}
		break;
	case CS47L90:
	case CS47L91:
		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
			regmap_16bit_config = &cs47l90_16bit_spi_regmap;
			regmap_32bit_config = &cs47l90_32bit_spi_regmap;
		}
		break;
	default:
		dev_err(&spi->dev,
			"Unknown Madera SPI device type %ld\n", type);
		return -EINVAL;
	}

	name = madera_name_from_type(type);

	if (!regmap_16bit_config) {
		/* it's polite to say which codec isn't built into the kernel */
		dev_err(&spi->dev,
			"Kernel does not include support for %s\n", name);
		return -EINVAL;
	}

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

	madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
	if (IS_ERR(madera->regmap)) {
		ret = PTR_ERR(madera->regmap);
		dev_err(&spi->dev,
			"Failed to allocate 16-bit register map: %d\n",	ret);
		return ret;
	}

	madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
	if (IS_ERR(madera->regmap_32bit)) {
		ret = PTR_ERR(madera->regmap_32bit);
		dev_err(&spi->dev,
			"Failed to allocate 32-bit register map: %d\n",	ret);
		return ret;
	}

	madera->type = type;
	madera->type_name = name;
	madera->dev = &spi->dev;
	madera->irq = spi->irq;

	return madera_dev_init(madera);
}

static int madera_spi_remove(struct spi_device *spi)
{
	struct madera *madera = spi_get_drvdata(spi);

	madera_dev_exit(madera);

	return 0;
}

static const struct spi_device_id madera_spi_ids[] = {
	{ "cs47l35", CS47L35 },
	{ "cs47l85", CS47L85 },
	{ "cs47l90", CS47L90 },
	{ "cs47l91", CS47L91 },
	{ "wm1840", WM1840 },
	{ }
};
MODULE_DEVICE_TABLE(spi, madera_spi_ids);

static struct spi_driver madera_spi_driver = {
	.driver = {
		.name	= "madera",
		.pm	= &madera_pm_ops,
		.of_match_table	= of_match_ptr(madera_of_match),
	},
	.probe		= madera_spi_probe,
	.remove		= madera_spi_remove,
	.id_table	= madera_spi_ids,
};

module_spi_driver(madera_spi_driver);

MODULE_DESCRIPTION("Madera SPI bus interface");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
16b27467 RF	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* SPI bus interface to Cirrus Logic Madera codecs
	4	*
	5	* Copyright (C) 2015-2018 Cirrus Logic
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; version 2.
	10	*/
	11
	12	#include <linux/device.h>
	13	#include <linux/err.h>
	14	#include <linux/module.h>
	15	#include <linux/of.h>
	16	#include <linux/of_device.h>
	17	#include <linux/regmap.h>
	18	#include <linux/spi/spi.h>
	19
	20	#include <linux/mfd/madera/core.h>
	21
	22	#include "madera.h"
	23
	24	static int madera_spi_probe(struct spi_device *spi)
	25	{
	26	const struct spi_device_id *id = spi_get_device_id(spi);
	27	struct madera *madera;
	28	const struct regmap_config *regmap_16bit_config = NULL;
	29	const struct regmap_config *regmap_32bit_config = NULL;
	30	const void *of_data;
	31	unsigned long type;
	32	const char *name;
	33	int ret;
	34
	35	of_data = of_device_get_match_data(&spi->dev);
	36	if (of_data)
	37	type = (unsigned long)of_data;
	38	else
	39	type = id->driver_data;
	40
	41	switch (type) {
	42	case CS47L35:
	43	if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
	44	regmap_16bit_config = &cs47l35_16bit_spi_regmap;
	45	regmap_32bit_config = &cs47l35_32bit_spi_regmap;
	46	}
	47	break;
	48	case CS47L85:
	49	case WM1840:
	50	if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
	51	regmap_16bit_config = &cs47l85_16bit_spi_regmap;
	52	regmap_32bit_config = &cs47l85_32bit_spi_regmap;
	53	}
	54	break;
	55	case CS47L90:
	56	case CS47L91:
	57	if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
	58	regmap_16bit_config = &cs47l90_16bit_spi_regmap;
	59	regmap_32bit_config = &cs47l90_32bit_spi_regmap;
	60	}
	61	break;
	62	default:
	63	dev_err(&spi->dev,
	64	"Unknown Madera SPI device type %ld\n", type);
65	return -EINVAL;
66	}
67
68	name = madera_name_from_type(type);
69
70	if (!regmap_16bit_config) {
71	/* it's polite to say which codec isn't built into the kernel */
72	dev_err(&spi->dev,
73	"Kernel does not include support for %s\n", name);
74	return -EINVAL;
75	}
76
77	madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
78	if (!madera)
79	return -ENOMEM;
80
81	madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
82	if (IS_ERR(madera->regmap)) {
83	ret = PTR_ERR(madera->regmap);
84	dev_err(&spi->dev,
85	"Failed to allocate 16-bit register map: %d\n", ret);
86	return ret;
87	}
88
89	madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
90	if (IS_ERR(madera->regmap_32bit)) {
91	ret = PTR_ERR(madera->regmap_32bit);
92	dev_err(&spi->dev,
93	"Failed to allocate 32-bit register map: %d\n", ret);
94	return ret;
95	}
96
97	madera->type = type;
98	madera->type_name = name;
99	madera->dev = &spi->dev;
100	madera->irq = spi->irq;
101
102	return madera_dev_init(madera);
103	}
104
105	static int madera_spi_remove(struct spi_device *spi)
106	{
107	struct madera *madera = spi_get_drvdata(spi);
108
109	madera_dev_exit(madera);
110
111	return 0;
112	}
113
114	static const struct spi_device_id madera_spi_ids[] = {
115	{ "cs47l35", CS47L35 },
116	{ "cs47l85", CS47L85 },
117	{ "cs47l90", CS47L90 },
118	{ "cs47l91", CS47L91 },
119	{ "wm1840", WM1840 },
120	{ }
121	};
122	MODULE_DEVICE_TABLE(spi, madera_spi_ids);
123
124	static struct spi_driver madera_spi_driver = {
125	.driver = {
126	.name = "madera",
127	.pm = &madera_pm_ops,
128	.of_match_table = of_match_ptr(madera_of_match),
129	},
130	.probe = madera_spi_probe,
131	.remove = madera_spi_remove,
132	.id_table = madera_spi_ids,
133	};
134
135	module_spi_driver(madera_spi_driver);
136
137	MODULE_DESCRIPTION("Madera SPI bus interface");
138	MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
139	MODULE_LICENSE("GPL v2");