linux/drivers/mfd/arizona-spi.c
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   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
  25static 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, type;
  31
  32        if (spi->dev.of_node)
  33                type = arizona_of_get_type(&spi->dev);
  34        else
  35                type = id->driver_data;
  36
  37        switch (type) {
  38#ifdef CONFIG_MFD_WM5102
  39        case WM5102:
  40                regmap_config = &wm5102_spi_regmap;
  41                break;
  42#endif
  43#ifdef CONFIG_MFD_WM5110
  44        case WM5110:
  45                regmap_config = &wm5110_spi_regmap;
  46                break;
  47#endif
  48        default:
  49                dev_err(&spi->dev, "Unknown device type %ld\n",
  50                        id->driver_data);
  51                return -EINVAL;
  52        }
  53
  54        arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
  55        if (arizona == NULL)
  56                return -ENOMEM;
  57
  58        arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
  59        if (IS_ERR(arizona->regmap)) {
  60                ret = PTR_ERR(arizona->regmap);
  61                dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  62                        ret);
  63                return ret;
  64        }
  65
  66        arizona->type = id->driver_data;
  67        arizona->dev = &spi->dev;
  68        arizona->irq = spi->irq;
  69
  70        return arizona_dev_init(arizona);
  71}
  72
  73static int arizona_spi_remove(struct spi_device *spi)
  74{
  75        struct arizona *arizona = spi_get_drvdata(spi);
  76        arizona_dev_exit(arizona);
  77        return 0;
  78}
  79
  80static const struct spi_device_id arizona_spi_ids[] = {
  81        { "wm5102", WM5102 },
  82        { "wm5110", WM5110 },
  83        { },
  84};
  85MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
  86
  87static struct spi_driver arizona_spi_driver = {
  88        .driver = {
  89                .name   = "arizona",
  90                .owner  = THIS_MODULE,
  91                .pm     = &arizona_pm_ops,
  92                .of_match_table = of_match_ptr(arizona_of_match),
  93        },
  94        .probe          = arizona_spi_probe,
  95        .remove         = arizona_spi_remove,
  96        .id_table       = arizona_spi_ids,
  97};
  98
  99module_spi_driver(arizona_spi_driver);
 100
 101MODULE_DESCRIPTION("Arizona SPI bus interface");
 102MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 103MODULE_LICENSE("GPL");
 104
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