GNU Linux-libre 5.19-rc6-gnu
[releases.git] / 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
20 static 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 };
31 MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
32
33 static 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 };
44 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
45
46 static 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
55 static 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
88 static int mc13xxx_i2c_remove(struct i2c_client *client)
89 {
90         mc13xxx_common_exit(&client->dev);
91         return 0;
92 }
93
94 static struct i2c_driver mc13xxx_i2c_driver = {
95         .id_table = mc13xxx_i2c_device_id,
96         .driver = {
97                 .name = "mc13xxx",
98                 .of_match_table = mc13xxx_dt_ids,
99         },
100         .probe = mc13xxx_i2c_probe,
101         .remove = mc13xxx_i2c_remove,
102 };
103
104 static int __init mc13xxx_i2c_init(void)
105 {
106         return i2c_add_driver(&mc13xxx_i2c_driver);
107 }
108 subsys_initcall(mc13xxx_i2c_init);
109
110 static void __exit mc13xxx_i2c_exit(void)
111 {
112         i2c_del_driver(&mc13xxx_i2c_driver);
113 }
114 module_exit(mc13xxx_i2c_exit);
115
116 MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
117 MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
118 MODULE_LICENSE("GPL v2");