tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/i2c.h>
15#include <linux/err.h>
16
17#include "mc13xxx.h"
18
19static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
20 {
21 .name = "mc13892",
22 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
23 }, {
24 .name = "mc34708",
25 .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc34708,
26 }, {
27 /* sentinel */
28 }
29};
30MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
31
32static const struct of_device_id mc13xxx_dt_ids[] = {
33 {
34 .compatible = "fsl,mc13892",
35 .data = &mc13xxx_variant_mc13892,
36 }, {
37 .compatible = "fsl,mc34708",
38 .data = &mc13xxx_variant_mc34708,
39 }, {
40 /* sentinel */
41 }
42};
43MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
44
45static const struct regmap_config mc13xxx_regmap_i2c_config = {
46 .reg_bits = 8,
47 .val_bits = 24,
48
49 .max_register = MC13XXX_NUMREGS,
50
51 .cache_type = REGCACHE_NONE,
52};
53
54static int mc13xxx_i2c_probe(struct i2c_client *client)
55{
56 const struct i2c_device_id *id = i2c_client_get_device_id(client);
57 struct mc13xxx *mc13xxx;
58 int ret;
59
60 mc13xxx = devm_kzalloc(&client->dev, sizeof(*mc13xxx), GFP_KERNEL);
61 if (!mc13xxx)
62 return -ENOMEM;
63
64 dev_set_drvdata(&client->dev, mc13xxx);
65
66 mc13xxx->irq = client->irq;
67
68 mc13xxx->regmap = devm_regmap_init_i2c(client,
69 &mc13xxx_regmap_i2c_config);
70 if (IS_ERR(mc13xxx->regmap)) {
71 ret = PTR_ERR(mc13xxx->regmap);
72 dev_err(&client->dev, "Failed to initialize regmap: %d\n", ret);
73 return ret;
74 }
75
76 if (client->dev.of_node) {
77 const struct of_device_id *of_id =
78 of_match_device(mc13xxx_dt_ids, &client->dev);
79 mc13xxx->variant = of_id->data;
80 } else {
81 mc13xxx->variant = (void *)id->driver_data;
82 }
83
84 return mc13xxx_common_init(&client->dev);
85}
86
87static void mc13xxx_i2c_remove(struct i2c_client *client)
88{
89 mc13xxx_common_exit(&client->dev);
90}
91
92static struct i2c_driver mc13xxx_i2c_driver = {
93 .id_table = mc13xxx_i2c_device_id,
94 .driver = {
95 .name = "mc13xxx",
96 .of_match_table = mc13xxx_dt_ids,
97 },
98 .probe_new = mc13xxx_i2c_probe,
99 .remove = mc13xxx_i2c_remove,
100};
101
102static int __init mc13xxx_i2c_init(void)
103{
104 return i2c_add_driver(&mc13xxx_i2c_driver);
105}
106subsys_initcall(mc13xxx_i2c_init);
107
108static void __exit mc13xxx_i2c_exit(void)
109{
110 i2c_del_driver(&mc13xxx_i2c_driver);
111}
112module_exit(mc13xxx_i2c_exit);
113
114MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
115MODULE_AUTHOR("Marc Reilly <marc@cpdesign.com.au");
116MODULE_LICENSE("GPL v2");