madera-spi.c 3.6 KB

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  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. #include <linux/device.h>
  8. #include <linux/err.h>
  9. #include <linux/module.h>
  10. #include <linux/of.h>
  11. #include <linux/of_device.h>
  12. #include <linux/regmap.h>
  13. #include <linux/spi/spi.h>
  14. #include <linux/mfd/madera/core.h>
  15. #include "madera.h"
  16. static int madera_spi_probe(struct spi_device *spi)
  17. {
  18. const struct spi_device_id *id = spi_get_device_id(spi);
  19. struct madera *madera;
  20. const struct regmap_config *regmap_16bit_config = NULL;
  21. const struct regmap_config *regmap_32bit_config = NULL;
  22. const void *of_data;
  23. unsigned long type;
  24. const char *name;
  25. int ret;
  26. of_data = of_device_get_match_data(&spi->dev);
  27. if (of_data)
  28. type = (unsigned long)of_data;
  29. else
  30. type = id->driver_data;
  31. switch (type) {
  32. case CS47L15:
  33. if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
  34. regmap_16bit_config = &cs47l15_16bit_spi_regmap;
  35. regmap_32bit_config = &cs47l15_32bit_spi_regmap;
  36. }
  37. break;
  38. case CS47L35:
  39. if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
  40. regmap_16bit_config = &cs47l35_16bit_spi_regmap;
  41. regmap_32bit_config = &cs47l35_32bit_spi_regmap;
  42. }
  43. break;
  44. case CS47L85:
  45. case WM1840:
  46. if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
  47. regmap_16bit_config = &cs47l85_16bit_spi_regmap;
  48. regmap_32bit_config = &cs47l85_32bit_spi_regmap;
  49. }
  50. break;
  51. case CS47L90:
  52. case CS47L91:
  53. if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
  54. regmap_16bit_config = &cs47l90_16bit_spi_regmap;
  55. regmap_32bit_config = &cs47l90_32bit_spi_regmap;
  56. }
  57. break;
  58. case CS42L92:
  59. case CS47L92:
  60. case CS47L93:
  61. if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
  62. regmap_16bit_config = &cs47l92_16bit_spi_regmap;
  63. regmap_32bit_config = &cs47l92_32bit_spi_regmap;
  64. }
  65. break;
  66. default:
  67. dev_err(&spi->dev,
  68. "Unknown Madera SPI device type %ld\n", type);
  69. return -EINVAL;
  70. }
  71. name = madera_name_from_type(type);
  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. madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
  79. if (!madera)
  80. return -ENOMEM;
  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. madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
  89. if (IS_ERR(madera->regmap_32bit)) {
  90. ret = PTR_ERR(madera->regmap_32bit);
  91. dev_err(&spi->dev,
  92. "Failed to allocate 32-bit register map: %d\n", ret);
  93. return ret;
  94. }
  95. madera->type = type;
  96. madera->type_name = name;
  97. madera->dev = &spi->dev;
  98. madera->irq = spi->irq;
  99. return madera_dev_init(madera);
  100. }
  101. static int madera_spi_remove(struct spi_device *spi)
  102. {
  103. struct madera *madera = spi_get_drvdata(spi);
  104. madera_dev_exit(madera);
  105. return 0;
  106. }
  107. static const struct spi_device_id madera_spi_ids[] = {
  108. { "cs47l15", CS47L15 },
  109. { "cs47l35", CS47L35 },
  110. { "cs47l85", CS47L85 },
  111. { "cs47l90", CS47L90 },
  112. { "cs47l91", CS47L91 },
  113. { "cs42l92", CS42L92 },
  114. { "cs47l92", CS47L92 },
  115. { "cs47l93", CS47L93 },
  116. { "wm1840", WM1840 },
  117. { }
  118. };
  119. MODULE_DEVICE_TABLE(spi, madera_spi_ids);
  120. static struct spi_driver madera_spi_driver = {
  121. .driver = {
  122. .name = "madera",
  123. .pm = &madera_pm_ops,
  124. .of_match_table = of_match_ptr(madera_of_match),
  125. },
  126. .probe = madera_spi_probe,
  127. .remove = madera_spi_remove,
  128. .id_table = madera_spi_ids,
  129. };
  130. module_spi_driver(madera_spi_driver);
  131. MODULE_DESCRIPTION("Madera SPI bus interface");
  132. MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
  133. MODULE_LICENSE("GPL v2");