drivers/mfd/mc13xxx-i2c.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright 2009-2010 Creative Product Design
0004  * Marc Reilly marc@cpdesign.com.au
0005  */
0006
0007 #include <linux/slab.h>
0008 #include <linux/module.h>
0009 #include <linux/platform_device.h>
0010 #include <linux/mfd/core.h>
0011 #include <linux/mfd/mc13xxx.h>
0012 #include <linux/of.h>
0013 #include <linux/of_device.h>
0014 #include <linux/of_gpio.h>
0015 #include <linux/i2c.h>
0016 #include <linux/err.h>
0017
0018 #include "mc13xxx.h"
0019
0020 static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
0021     {
0022         .name = "mc13892",
0023         .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
0024     }, {
0025         .name = "mc34708",
0026         .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
0027     }, {
0028         /* sentinel */
0029     }
0030 };
0031 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
0032
0033 static const struct of_device_id mc13xxx_dt_ids[] = {
0034     {
0035         .compatible = "fsl,mc13892",
0036         .data = &mc13xxx_variant_mc13892,
0037     }, {
0038         .compatible = "fsl,mc34708",
0039         .data = &mc13xxx_variant_mc34708,
0040     }, {
0041         /* sentinel */
0042     }
0043 };
0044 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
0045
0046 static const struct regmap_config mc13xxx_regmap_i2c_config = {
0047     .reg_bits = 8,
0048     .val_bits = 24,
0049
0050     .max_register = MC13XXX_NUMREGS,
0051
0052     .cache_type = REGCACHE_NONE,
0053 };
0054
0055 static int mc13xxx_i2c_probe(struct i2c_client *client,
0056         const struct i2c_device_id *id)
0057 {
0058     struct mc13xxx *mc13xxx;
0059     int ret;
0060
0061     mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
0062     if (!mc13xxx)
0063         return -ENOMEM;
0064
0065     dev_set_drvdata(&client->dev, mc13xxx);
0066
0067     mc13xxx->irq = client->irq;
0068
0069     mc13xxx->regmap = devm_regmap_init_i2c(client,
0070                            &mc13xxx_regmap_i2c_config);
0071     if (IS_ERR(mc13xxx->regmap)) {
0072         ret = PTR_ERR(mc13xxx->regmap);
0073         dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
0074         return ret;
0075     }
0076
0077     if (client->dev.of_node) {
0078         const struct of_device_id *of_id =
0079             of_match_device(mc13xxx_dt_ids, &client->dev);
0080         mc13xxx->variant = of_id->data;
0081     } else {
0082         mc13xxx->variant = (void *)id->driver_data;
0083     }
0084
0085     return mc13xxx_common_init(&client->dev);
0086 }
0087
0088 static int mc13xxx_i2c_remove(struct i2c_client *client)
0089 {
0090     mc13xxx_common_exit(&client->dev);
0091     return 0;
0092 }
0093
0094 static struct i2c_driver mc13xxx_i2c_driver = {
0095     .id_table = mc13xxx_i2c_device_id,
0096     .driver = {
0097         .name = "mc13xxx",
0098         .of_match_table = mc13xxx_dt_ids,
0099     },
0100     .probe = mc13xxx_i2c_probe,
0101     .remove = mc13xxx_i2c_remove,
0102 };
0103
0104 static int __init mc13xxx_i2c_init(void)
0105 {
0106     return i2c_add_driver(&mc13xxx_i2c_driver);
0107 }
0108 subsys_initcall(mc13xxx_i2c_init);
0109
0110 static void __exit mc13xxx_i2c_exit(void)
0111 {
0112     i2c_del_driver(&mc13xxx_i2c_driver);
0113 }
0114 module_exit(mc13xxx_i2c_exit);
0115
0116 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
0117 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
0118 MODULE_LICENSE("GPL v2");