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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
// SPDX-License-Identifier: GPL-2.0+
//
// MFD core driver for the Maxim MAX77843
//
// Copyright (C) 2015 Samsung Electronics
// Author: Jaewon Kim <jaewon02.kim@samsung.com>
// Author: Beomho Seo <beomho.seo@samsung.com>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77693-common.h>
#include <linux/mfd/max77843-private.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
static const struct mfd_cell max77843_devs[] = {
{
.name = "max77843-muic",
.of_compatible = "maxim,max77843-muic",
}, {
.name = "max77843-regulator",
.of_compatible = "maxim,max77843-regulator",
}, {
.name = "max77843-charger",
.of_compatible = "maxim,max77843-charger"
}, {
.name = "max77843-fuelgauge",
.of_compatible = "maxim,max77843-fuelgauge",
}, {
.name = "max77843-haptic",
.of_compatible = "maxim,max77843-haptic",
},
};
static const struct regmap_config max77843_charger_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77843_CHG_REG_END,
};
static const struct regmap_config max77843_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77843_SYS_REG_END,
};
static const struct regmap_irq max77843_irqs[] = {
/* TOPSYS interrupts */
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
};
static const struct regmap_irq_chip max77843_irq_chip = {
.name = "max77843",
.status_base = MAX77843_SYS_REG_SYSINTSRC,
.mask_base = MAX77843_SYS_REG_SYSINTMASK,
.mask_invert = false,
.num_regs = 1,
.irqs = max77843_irqs,
.num_irqs = ARRAY_SIZE(max77843_irqs),
};
/* Charger and Charger regulator use same regmap. */
static int max77843_chg_init(struct max77693_dev *max77843)
{
int ret;
max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
if (IS_ERR(max77843->i2c_chg)) {
dev_err(&max77843->i2c->dev,
"Cannot allocate I2C device for Charger\n");
return PTR_ERR(max77843->i2c_chg);
}
i2c_set_clientdata(max77843->i2c_chg, max77843);
max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
&max77843_charger_regmap_config);
if (IS_ERR(max77843->regmap_chg)) {
ret = PTR_ERR(max77843->regmap_chg);
goto err_chg_i2c;
}
return 0;
err_chg_i2c:
i2c_unregister_device(max77843->i2c_chg);
return ret;
}
static int max77843_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max77693_dev *max77843;
unsigned int reg_data;
int ret;
max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
if (!max77843)
return -ENOMEM;
i2c_set_clientdata(i2c, max77843);
max77843->dev = &i2c->dev;
max77843->i2c = i2c;
max77843->irq = i2c->irq;
max77843->type = id->driver_data;
max77843->regmap = devm_regmap_init_i2c(i2c,
&max77843_regmap_config);
if (IS_ERR(max77843->regmap)) {
dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
return PTR_ERR(max77843->regmap);
}
ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
0, &max77843_irq_chip, &max77843->irq_data_topsys);
if (ret) {
dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
return ret;
}
ret = regmap_read(max77843->regmap,
MAX77843_SYS_REG_PMICID, ®_data);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read PMIC ID\n");
goto err_pmic_id;
}
dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
ret = max77843_chg_init(max77843);
if (ret) {
dev_err(&i2c->dev, "Failed to init Charger\n");
goto err_pmic_id;
}
ret = regmap_update_bits(max77843->regmap,
MAX77843_SYS_REG_INTSRCMASK,
MAX77843_INTSRC_MASK_MASK,
(unsigned int)~MAX77843_INTSRC_MASK_MASK);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
goto err_pmic_id;
}
ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to add mfd device\n");
goto err_pmic_id;
}
device_init_wakeup(max77843->dev, true);
return 0;
err_pmic_id:
regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
return ret;
}
static const struct of_device_id max77843_dt_match[] = {
{ .compatible = "maxim,max77843", },
{ },
};
static const struct i2c_device_id max77843_id[] = {
{ "max77843", TYPE_MAX77843, },
{ },
};
static int __maybe_unused max77843_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
disable_irq(max77843->irq);
if (device_may_wakeup(dev))
enable_irq_wake(max77843->irq);
return 0;
}
static int __maybe_unused max77843_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
disable_irq_wake(max77843->irq);
enable_irq(max77843->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
static struct i2c_driver max77843_i2c_driver = {
.driver = {
.name = "max77843",
.pm = &max77843_pm,
.of_match_table = max77843_dt_match,
.suppress_bind_attrs = true,
},
.probe = max77843_probe,
.id_table = max77843_id,
};
static int __init max77843_i2c_init(void)
{
return i2c_add_driver(&max77843_i2c_driver);
}
subsys_initcall(max77843_i2c_init);
|
