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