LXR linux/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#include <linux/of.h>
  21
  22#include <linux/mfd/arizona/core.h>
  23
  24#include "arizona.h"
  25
  26static int arizona_spi_probe(struct spi_device *spi)
  27{
  28        const struct spi_device_id *id = spi_get_device_id(spi);
  29        struct arizona *arizona;
  30        const struct regmap_config *regmap_config;
  31        unsigned long type;
  32        int ret;
  33
  34        if (spi->dev.of_node)
  35                type = arizona_of_get_type(&spi->dev);
  36        else
  37                type = id->driver_data;
  38
  39        switch (type) {
  40#ifdef CONFIG_MFD_WM5102
  41        case WM5102:
  42                regmap_config = &wm5102_spi_regmap;
  43                break;
  44#endif
  45#ifdef CONFIG_MFD_WM5110
  46        case WM5110:
  47        case WM8280:
  48                regmap_config = &wm5110_spi_regmap;
  49                break;
  50#endif
  51        default:
  52                dev_err(&spi->dev, "Unknown device type %ld\n",
  53                        id->driver_data);
  54                return -EINVAL;
  55        }
  56
  57        arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
  58        if (arizona == NULL)
  59                return -ENOMEM;
  60
  61        arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
  62        if (IS_ERR(arizona->regmap)) {
  63                ret = PTR_ERR(arizona->regmap);
  64                dev_err(&spi->dev, "Failed to allocate register map: %d\n",
  65                        ret);
  66                return ret;
  67        }
  68
  69        arizona->type = id->driver_data;
  70        arizona->dev = &spi->dev;
  71        arizona->irq = spi->irq;
  72
  73        return arizona_dev_init(arizona);
  74}
  75
  76static int arizona_spi_remove(struct spi_device *spi)
  77{
  78        struct arizona *arizona = spi_get_drvdata(spi);
  79
  80        arizona_dev_exit(arizona);
  81
  82        return 0;
  83}
  84
  85static const struct spi_device_id arizona_spi_ids[] = {
  86        { "wm5102", WM5102 },
  87        { "wm5110", WM5110 },
  88        { "wm8280", WM8280 },
  89        { },
  90};
  91MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
  92
  93static struct spi_driver arizona_spi_driver = {
  94        .driver = {
  95                .name   = "arizona",
  96                .owner  = THIS_MODULE,
  97                .pm     = &arizona_pm_ops,
  98                .of_match_table = of_match_ptr(arizona_of_match),
  99        },
 100        .probe          = arizona_spi_probe,
 101        .remove         = arizona_spi_remove,
 102        .id_table       = arizona_spi_ids,
 103};
 104
 105module_spi_driver(arizona_spi_driver);
 106
 107MODULE_DESCRIPTION("Arizona SPI bus interface");
 108MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 109MODULE_LICENSE("GPL");
 110