LXR linux/drivers/mfd/mc13xxx-i2c.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright 2009-2010 Creative Product Design
   4 * Marc Reilly marc@cpdesign.com.au
   5 */
   6
   7#include <linux/slab.h>
   8#include <linux/module.h>
   9#include <linux/platform_device.h>
  10#include <linux/mfd/core.h>
  11#include <linux/mfd/mc13xxx.h>
  12#include <linux/of.h>
  13#include <linux/of_device.h>
  14#include <linux/of_gpio.h>
  15#include <linux/i2c.h>
  16#include <linux/err.h>
  17
  18#include "mc13xxx.h"
  19
  20static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
  21        {
  22                .name = "mc13892",
  23                .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
  24        }, {
  25                .name = "mc34708",
  26                .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
  27        }, {
  28                /* sentinel */
  29        }
  30};
  31MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
  32
  33static const struct of_device_id mc13xxx_dt_ids[] = {
  34        {
  35                .compatible = "fsl,mc13892",
  36                .data = &mc13xxx_variant_mc13892,
  37        }, {
  38                .compatible = "fsl,mc34708",
  39                .data = &mc13xxx_variant_mc34708,
  40        }, {
  41                /* sentinel */
  42        }
  43};
  44MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
  45
  46static const struct regmap_config mc13xxx_regmap_i2c_config = {
  47        .reg_bits = 8,
  48        .val_bits = 24,
  49
  50        .max_register = MC13XXX_NUMREGS,
  51
  52        .cache_type = REGCACHE_NONE,
  53};
  54
  55static int mc13xxx_i2c_probe(struct i2c_client *client,
  56                const struct i2c_device_id *id)
  57{
  58        struct mc13xxx *mc13xxx;
  59        int ret;
  60
  61        mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
  62        if (!mc13xxx)
  63                return -ENOMEM;
  64
  65        dev_set_drvdata(&client->dev, mc13xxx);
  66
  67        mc13xxx->irq = client->irq;
  68
  69        mc13xxx->regmap = devm_regmap_init_i2c(client,
  70                                               &mc13xxx_regmap_i2c_config);
  71        if (IS_ERR(mc13xxx->regmap)) {
  72                ret = PTR_ERR(mc13xxx->regmap);
  73                dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
  74                return ret;
  75        }
  76
  77        if (client->dev.of_node) {
  78                const struct of_device_id *of_id =
  79                        of_match_device(mc13xxx_dt_ids, &client->dev);
  80                mc13xxx->variant = of_id->data;
  81        } else {
  82                mc13xxx->variant = (void *)id->driver_data;
  83        }
  84
  85        return mc13xxx_common_init(&client->dev);
  86}
  87
  88static int mc13xxx_i2c_remove(struct i2c_client *client)
  89{
  90        return mc13xxx_common_exit(&client->dev);
  91}
  92
  93static struct i2c_driver mc13xxx_i2c_driver = {
  94        .id_table = mc13xxx_i2c_device_id,
  95        .driver = {
  96                .name = "mc13xxx",
  97                .of_match_table = mc13xxx_dt_ids,
  98        },
  99        .probe = mc13xxx_i2c_probe,
 100        .remove = mc13xxx_i2c_remove,
 101};
 102
 103static int __init mc13xxx_i2c_init(void)
 104{
 105        return i2c_add_driver(&mc13xxx_i2c_driver);
 106}
 107subsys_initcall(mc13xxx_i2c_init);
 108
 109static void __exit mc13xxx_i2c_exit(void)
 110{
 111        i2c_del_driver(&mc13xxx_i2c_driver);
 112}
 113module_exit(mc13xxx_i2c_exit);
 114
 115MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
 116MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
 117MODULE_LICENSE("GPL v2");
 118