drivers/mfd/arizona-spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arizona-spi.c  --  Arizona SPI bus interface
   4  *
   5  * Copyright 2012 Wolfson Microelectronics plc
   6  *
   7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   8  */
   9
  10 #include <linux/err.h>
  11 #include <linux/module.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/regmap.h>
  14 #include <linux/regulator/consumer.h>
  15 #include <linux/slab.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/of.h>
  18
  19 #include <linux/mfd/arizona/core.h>
  20
  21 #include "arizona.h"
  22
  23 static int arizona_spi_probe(struct spi_device *spi)
  24 {
  25         const struct spi_device_id *id = spi_get_device_id(spi);
  26         struct arizona *arizona;
  27         const struct regmap_config *regmap_config = NULL;
  28         unsigned long type;
  29         int ret;
  30
  31         if (spi->dev.of_node)
  32                 type = arizona_of_get_type(&spi->dev);
  33         else
  34                 type = id->driver_data;
  35
  36         switch (type) {
  37         case WM5102:
  38                 if (IS_ENABLED(CONFIG_MFD_WM5102))
  39                         regmap_config = &wm5102_spi_regmap;
  40                 break;
  41         case WM5110:
  42         case WM8280:
  43                 if (IS_ENABLED(CONFIG_MFD_WM5110))
  44                         regmap_config = &wm5110_spi_regmap;
  45                 break;
  46         case WM1831:
  47         case CS47L24:
  48                 if (IS_ENABLED(CONFIG_MFD_CS47L24))
  49                         regmap_config = &cs47l24_spi_regmap;
  50                 break;
  51         default:
  52                 dev_err(&spi->dev, "Unknown device type %ld\n", type);
  53                 return -EINVAL;
  54         }
  55
  56         if (!regmap_config) {
  57                 dev_err(&spi->dev,
  58                         "No kernel support for device type %ld\n", type);
  59                 return -EINVAL;
  60         }
  61
  62         arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
  63         if (arizona == NULL)
  64                 return -ENOMEM;
  65
  66         arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
  67         if (IS_ERR(arizona->regmap)) {
  68                 ret = PTR_ERR(arizona->regmap);
  69                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  70                         ret);
  71                 return ret;
  72         }
  73
  74         arizona->type = type;
  75         arizona->dev = &spi->dev;
  76         arizona->irq = spi->irq;
  77
  78         return arizona_dev_init(arizona);
  79 }
  80
  81 static int arizona_spi_remove(struct spi_device *spi)
  82 {
  83         struct arizona *arizona = spi_get_drvdata(spi);
  84
  85         arizona_dev_exit(arizona);
  86
  87         return 0;
  88 }
  89
  90 static const struct spi_device_id arizona_spi_ids[] = {
  91         { "wm5102", WM5102 },
  92         { "wm5110", WM5110 },
  93         { "wm8280", WM8280 },
  94         { "wm1831", WM1831 },
  95         { "cs47l24", CS47L24 },
  96         { },
  97 };
  98 MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
  99
 100 static struct spi_driver arizona_spi_driver = {
 101         .driver = {
 102                 .name   = "arizona",
 103                 .pm     = &arizona_pm_ops,
 104                 .of_match_table = of_match_ptr(arizona_of_match),
 105         },
 106         .probe          = arizona_spi_probe,
 107         .remove         = arizona_spi_remove,
 108         .id_table       = arizona_spi_ids,
 109 };
 110
 111 module_spi_driver(arizona_spi_driver);
 112
 113 MODULE_DESCRIPTION("Arizona SPI bus interface");
 114 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 115 MODULE_LICENSE("GPL");