drivers/mfd/arizona-spi.c

   1 /*
   2  * arizona-spi.c  --  Arizona SPI bus interface
   3  *
   4  * Copyright 2012 Wolfson Microelectronics plc
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/module.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/regmap.h>
  17 #include <linux/regulator/consumer.h>
  18 #include <linux/slab.h>
  19 #include <linux/spi/spi.h>
  20
  21 #include <linux/mfd/arizona/core.h>
  22
  23 #include "arizona.h"
  24
  25 static int arizona_spi_probe(struct spi_device *spi)
  26 {
  27         const struct spi_device_id *id = spi_get_device_id(spi);
  28         struct arizona *arizona;
  29         const struct regmap_config *regmap_config;
  30         int ret;
  31
  32         switch (id->driver_data) {
  33 #ifdef CONFIG_MFD_WM5102
  34         case WM5102:
  35                 regmap_config = &wm5102_spi_regmap;
  36                 break;
  37 #endif
  38 #ifdef CONFIG_MFD_WM5110
  39         case WM5110:
  40                 regmap_config = &wm5110_spi_regmap;
  41                 break;
  42 #endif
  43         default:
  44                 dev_err(&spi->dev, "Unknown device type %ld\n",
  45                         id->driver_data);
  46                 return -EINVAL;
  47         }
  48
  49         arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
  50         if (arizona == NULL)
  51                 return -ENOMEM;
  52
  53         arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
  54         if (IS_ERR(arizona->regmap)) {
  55                 ret = PTR_ERR(arizona->regmap);
  56                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  57                         ret);
  58                 return ret;
  59         }
  60
  61         arizona->type = id->driver_data;
  62         arizona->dev = &spi->dev;
  63         arizona->irq = spi->irq;
  64
  65         return arizona_dev_init(arizona);
  66 }
  67
  68 static int arizona_spi_remove(struct spi_device *spi)
  69 {
  70         struct arizona *arizona = spi_get_drvdata(spi);
  71         arizona_dev_exit(arizona);
  72         return 0;
  73 }
  74
  75 static const struct spi_device_id arizona_spi_ids[] = {
  76         { "wm5102", WM5102 },
  77         { "wm5110", WM5110 },
  78         { },
  79 };
  80 MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
  81
  82 static struct spi_driver arizona_spi_driver = {
  83         .driver = {
  84                 .name   = "arizona",
  85                 .owner  = THIS_MODULE,
  86                 .pm     = &arizona_pm_ops,
  87         },
  88         .probe          = arizona_spi_probe,
  89         .remove         = arizona_spi_remove,
  90         .id_table       = arizona_spi_ids,
  91 };
  92
  93 module_spi_driver(arizona_spi_driver);
  94
  95 MODULE_DESCRIPTION("Arizona SPI bus interface");
  96 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  97 MODULE_LICENSE("GPL");