LXR linux/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
  23static 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
  81static 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
  90static 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};
  98MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
  99
 100static 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
 111module_spi_driver(arizona_spi_driver);
 112
 113MODULE_DESCRIPTION("Arizona SPI bus interface");
 114MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 115MODULE_LICENSE("GPL");
 116