1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * SPI bus interface to Cirrus Logic Madera codecs
  4 *
  5 * Copyright (C) 2015-2018 Cirrus Logic
  6 */
  7
  8#include <linux/device.h>
  9#include <linux/err.h>
 10#include <linux/module.h>
 11#include <linux/of.h>
 12#include <linux/regmap.h>
 13#include <linux/spi/spi.h>
 14
 15#include <linux/mfd/madera/core.h>
 16
 17#include "madera.h"
 18
 19static int madera_spi_probe(struct spi_device *spi)
 20{
 21	const struct spi_device_id *id = spi_get_device_id(spi);
 22	struct madera *madera;
 23	const struct regmap_config *regmap_16bit_config = NULL;
 24	const struct regmap_config *regmap_32bit_config = NULL;
 25	const void *of_data;
 26	unsigned long type;
 27	const char *name;
 28	int ret;
 29
 30	of_data = of_device_get_match_data(&spi->dev);
 31	if (of_data)
 32		type = (unsigned long)of_data;
 33	else
 34		type = id->driver_data;
 35
 36	switch (type) {
 37	case CS47L15:
 38		if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
 39			regmap_16bit_config = &cs47l15_16bit_spi_regmap;
 40			regmap_32bit_config = &cs47l15_32bit_spi_regmap;
 41		}
 42		break;
 43	case CS47L35:
 44		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
 45			regmap_16bit_config = &cs47l35_16bit_spi_regmap;
 46			regmap_32bit_config = &cs47l35_32bit_spi_regmap;
 47		}
 48		break;
 49	case CS47L85:
 50	case WM1840:
 51		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
 52			regmap_16bit_config = &cs47l85_16bit_spi_regmap;
 53			regmap_32bit_config = &cs47l85_32bit_spi_regmap;
 54		}
 55		break;
 56	case CS47L90:
 57	case CS47L91:
 58		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
 59			regmap_16bit_config = &cs47l90_16bit_spi_regmap;
 60			regmap_32bit_config = &cs47l90_32bit_spi_regmap;
 61		}
 62		break;
 63	case CS42L92:
 64	case CS47L92:
 65	case CS47L93:
 66		if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
 67			regmap_16bit_config = &cs47l92_16bit_spi_regmap;
 68			regmap_32bit_config = &cs47l92_32bit_spi_regmap;
 69		}
 70		break;
 71	default:
 72		dev_err(&spi->dev,
 73			"Unknown Madera SPI device type %ld\n", type);
 74		return -EINVAL;
 75	}
 76
 77	name = madera_name_from_type(type);
 78
 79	if (!regmap_16bit_config) {
 80		/* it's polite to say which codec isn't built into the kernel */
 81		dev_err(&spi->dev,
 82			"Kernel does not include support for %s\n", name);
 83		return -EINVAL;
 84	}
 85
 86	madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
 87	if (!madera)
 88		return -ENOMEM;
 89
 90	madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
 91	if (IS_ERR(madera->regmap)) {
 92		ret = PTR_ERR(madera->regmap);
 93		dev_err(&spi->dev,
 94			"Failed to allocate 16-bit register map: %d\n",	ret);
 95		return ret;
 96	}
 97
 98	madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
 99	if (IS_ERR(madera->regmap_32bit)) {
100		ret = PTR_ERR(madera->regmap_32bit);
101		dev_err(&spi->dev,
102			"Failed to allocate 32-bit register map: %d\n",	ret);
103		return ret;
104	}
105
106	madera->type = type;
107	madera->type_name = name;
108	madera->dev = &spi->dev;
109	madera->irq = spi->irq;
110
111	return madera_dev_init(madera);
112}
113
114static void madera_spi_remove(struct spi_device *spi)
115{
116	struct madera *madera = spi_get_drvdata(spi);
117
118	madera_dev_exit(madera);
119}
120
121static const struct spi_device_id madera_spi_ids[] = {
122	{ "cs47l15", CS47L15 },
123	{ "cs47l35", CS47L35 },
124	{ "cs47l85", CS47L85 },
125	{ "cs47l90", CS47L90 },
126	{ "cs47l91", CS47L91 },
127	{ "cs42l92", CS42L92 },
128	{ "cs47l92", CS47L92 },
129	{ "cs47l93", CS47L93 },
130	{ "wm1840", WM1840 },
131	{ }
132};
133MODULE_DEVICE_TABLE(spi, madera_spi_ids);
134
135static struct spi_driver madera_spi_driver = {
136	.driver = {
137		.name	= "madera",
138		.pm	= &madera_pm_ops,
139		.of_match_table	= of_match_ptr(madera_of_match),
140	},
141	.probe		= madera_spi_probe,
142	.remove		= madera_spi_remove,
143	.id_table	= madera_spi_ids,
144};
145
146module_spi_driver(madera_spi_driver);
147
148MODULE_DESCRIPTION("Madera SPI bus interface");
149MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
150MODULE_LICENSE("GPL v2");