1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
// SPDX-License-Identifier: GPL-2.0
/*
* BQ257XX Core Driver
* Copyright (C) 2025 Chris Morgan <macromorgan@hotmail.com>
*/
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/mfd/bq257xx.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
static const struct regmap_range bq25703_readonly_reg_ranges[] = {
regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_MANUFACT_DEV_ID),
};
static const struct regmap_access_table bq25703_writeable_regs = {
.no_ranges = bq25703_readonly_reg_ranges,
.n_no_ranges = ARRAY_SIZE(bq25703_readonly_reg_ranges),
};
static const struct regmap_range bq25703_volatile_reg_ranges[] = {
regmap_reg_range(BQ25703_CHARGE_OPTION_0, BQ25703_IIN_HOST),
regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_ADC_OPTION),
};
static const struct regmap_access_table bq25703_volatile_regs = {
.yes_ranges = bq25703_volatile_reg_ranges,
.n_yes_ranges = ARRAY_SIZE(bq25703_volatile_reg_ranges),
};
static const struct regmap_config bq25703_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = BQ25703_ADC_OPTION,
.cache_type = REGCACHE_MAPLE,
.wr_table = &bq25703_writeable_regs,
.volatile_table = &bq25703_volatile_regs,
.val_format_endian = REGMAP_ENDIAN_LITTLE,
};
static const struct mfd_cell cells[] = {
MFD_CELL_NAME("bq257xx-regulator"),
MFD_CELL_NAME("bq257xx-charger"),
};
static int bq257xx_probe(struct i2c_client *client)
{
struct bq257xx_device *ddata;
int ret;
ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->client = client;
ddata->regmap = devm_regmap_init_i2c(client, &bq25703_regmap_config);
if (IS_ERR(ddata->regmap)) {
return dev_err_probe(&client->dev, PTR_ERR(ddata->regmap),
"Failed to allocate register map\n");
}
i2c_set_clientdata(client, ddata);
ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
cells, ARRAY_SIZE(cells), NULL, 0, NULL);
if (ret)
return dev_err_probe(&client->dev, ret,
"Failed to register child devices\n");
return ret;
}
static const struct i2c_device_id bq257xx_i2c_ids[] = {
{ "bq25703a" },
{}
};
MODULE_DEVICE_TABLE(i2c, bq257xx_i2c_ids);
static const struct of_device_id bq257xx_of_match[] = {
{ .compatible = "ti,bq25703a" },
{}
};
MODULE_DEVICE_TABLE(of, bq257xx_of_match);
static struct i2c_driver bq257xx_driver = {
.driver = {
.name = "bq257xx",
.of_match_table = bq257xx_of_match,
},
.probe = bq257xx_probe,
.id_table = bq257xx_i2c_ids,
};
module_i2c_driver(bq257xx_driver);
MODULE_DESCRIPTION("bq257xx buck/boost/charger driver");
MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>");
MODULE_LICENSE("GPL");
|
