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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Fuel gauge driver for Richtek RT5033
*
* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
* Author: Beomho Seo <beomho.seo@samsung.com>
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/rt5033-private.h>
#include <linux/mfd/rt5033.h>
static int rt5033_battery_get_capacity(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
u32 msb;
regmap_read(battery->regmap, RT5033_FUEL_REG_SOC_H, &msb);
return msb;
}
static int rt5033_battery_get_present(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
u32 val;
regmap_read(battery->regmap, RT5033_FUEL_REG_CONFIG_L, &val);
return (val & RT5033_FUEL_BAT_PRESENT) ? true : false;
}
static int rt5033_battery_get_watt_prop(struct i2c_client *client,
enum power_supply_property psp)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
unsigned int regh, regl;
int ret;
u32 msb, lsb;
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
regh = RT5033_FUEL_REG_VBAT_H;
regl = RT5033_FUEL_REG_VBAT_L;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
regh = RT5033_FUEL_REG_AVG_VOLT_H;
regl = RT5033_FUEL_REG_AVG_VOLT_L;
break;
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
regh = RT5033_FUEL_REG_OCV_H;
regl = RT5033_FUEL_REG_OCV_L;
break;
default:
return -EINVAL;
}
regmap_read(battery->regmap, regh, &msb);
regmap_read(battery->regmap, regl, &lsb);
ret = ((msb << 4) + (lsb >> 4)) * 1250;
return ret;
}
static int rt5033_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct rt5033_battery *battery = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
val->intval = rt5033_battery_get_watt_prop(battery->client,
psp);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = rt5033_battery_get_present(battery->client);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = rt5033_battery_get_capacity(battery->client);
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property rt5033_battery_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CAPACITY,
};
static const struct regmap_config rt5033_battery_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RT5033_FUEL_REG_END,
};
static const struct power_supply_desc rt5033_battery_desc = {
.name = "rt5033-battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = rt5033_battery_get_property,
.properties = rt5033_battery_props,
.num_properties = ARRAY_SIZE(rt5033_battery_props),
};
static int rt5033_battery_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct power_supply_config psy_cfg = {};
struct rt5033_battery *battery;
u32 ret;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
battery = devm_kzalloc(&client->dev, sizeof(*battery), GFP_KERNEL);
if (!battery)
return -ENOMEM;
battery->client = client;
battery->regmap = devm_regmap_init_i2c(client,
&rt5033_battery_regmap_config);
if (IS_ERR(battery->regmap)) {
dev_err(&client->dev, "Failed to initialize regmap\n");
return -EINVAL;
}
i2c_set_clientdata(client, battery);
psy_cfg.drv_data = battery;
battery->psy = power_supply_register(&client->dev,
&rt5033_battery_desc, &psy_cfg);
if (IS_ERR(battery->psy)) {
dev_err(&client->dev, "Failed to register power supply\n");
ret = PTR_ERR(battery->psy);
return ret;
}
return 0;
}
static int rt5033_battery_remove(struct i2c_client *client)
{
struct rt5033_battery *battery = i2c_get_clientdata(client);
power_supply_unregister(battery->psy);
return 0;
}
static const struct i2c_device_id rt5033_battery_id[] = {
{ "rt5033-battery", },
{ }
};
MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);
static const struct of_device_id rt5033_battery_of_match[] = {
{ .compatible = "richtek,rt5033-battery", },
{ }
};
MODULE_DEVICE_TABLE(of, rt5033_battery_of_match);
static struct i2c_driver rt5033_battery_driver = {
.driver = {
.name = "rt5033-battery",
.of_match_table = rt5033_battery_of_match,
},
.probe = rt5033_battery_probe,
.remove = rt5033_battery_remove,
.id_table = rt5033_battery_id,
};
module_i2c_driver(rt5033_battery_driver);
MODULE_DESCRIPTION("Richtek RT5033 fuel gauge driver");
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
MODULE_LICENSE("GPL");
|
