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
220
221
222
223
224
225
226
227
228
229
230
231
232
|
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
//
// Core MFD driver for MAXIM 77650/77651 charger/power-supply.
// Programming manual: https://pdfserv.maximintegrated.com/en/an/AN6428.pdf
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#define MAX77650_INT_GPI_F_MSK BIT(0)
#define MAX77650_INT_GPI_R_MSK BIT(1)
#define MAX77650_INT_GPI_MSK \
(MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK)
#define MAX77650_INT_nEN_F_MSK BIT(2)
#define MAX77650_INT_nEN_R_MSK BIT(3)
#define MAX77650_INT_TJAL1_R_MSK BIT(4)
#define MAX77650_INT_TJAL2_R_MSK BIT(5)
#define MAX77650_INT_DOD_R_MSK BIT(6)
#define MAX77650_INT_THM_MSK BIT(0)
#define MAX77650_INT_CHG_MSK BIT(1)
#define MAX77650_INT_CHGIN_MSK BIT(2)
#define MAX77650_INT_TJ_REG_MSK BIT(3)
#define MAX77650_INT_CHGIN_CTRL_MSK BIT(4)
#define MAX77650_INT_SYS_CTRL_MSK BIT(5)
#define MAX77650_INT_SYS_CNFG_MSK BIT(6)
#define MAX77650_INT_GLBL_OFFSET 0
#define MAX77650_INT_CHG_OFFSET 1
#define MAX77650_SBIA_LPM_MASK BIT(5)
#define MAX77650_SBIA_LPM_DISABLED 0x00
enum {
MAX77650_INT_GPI,
MAX77650_INT_nEN_F,
MAX77650_INT_nEN_R,
MAX77650_INT_TJAL1_R,
MAX77650_INT_TJAL2_R,
MAX77650_INT_DOD_R,
MAX77650_INT_THM,
MAX77650_INT_CHG,
MAX77650_INT_CHGIN,
MAX77650_INT_TJ_REG,
MAX77650_INT_CHGIN_CTRL,
MAX77650_INT_SYS_CTRL,
MAX77650_INT_SYS_CNFG,
};
static const struct resource max77650_charger_resources[] = {
DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHG, "CHG"),
DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHGIN, "CHGIN"),
};
static const struct resource max77650_gpio_resources[] = {
DEFINE_RES_IRQ_NAMED(MAX77650_INT_GPI, "GPI"),
};
static const struct resource max77650_onkey_resources[] = {
DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_F, "nEN_F"),
DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_R, "nEN_R"),
};
static const struct mfd_cell max77650_cells[] = {
{
.name = "max77650-regulator",
.of_compatible = "maxim,max77650-regulator",
}, {
.name = "max77650-charger",
.of_compatible = "maxim,max77650-charger",
.resources = max77650_charger_resources,
.num_resources = ARRAY_SIZE(max77650_charger_resources),
}, {
.name = "max77650-gpio",
.of_compatible = "maxim,max77650-gpio",
.resources = max77650_gpio_resources,
.num_resources = ARRAY_SIZE(max77650_gpio_resources),
}, {
.name = "max77650-led",
.of_compatible = "maxim,max77650-led",
}, {
.name = "max77650-onkey",
.of_compatible = "maxim,max77650-onkey",
.resources = max77650_onkey_resources,
.num_resources = ARRAY_SIZE(max77650_onkey_resources),
},
};
static const struct regmap_irq max77650_irqs[] = {
[MAX77650_INT_GPI] = {
.reg_offset = MAX77650_INT_GLBL_OFFSET,
.mask = MAX77650_INT_GPI_MSK,
.type = {
.type_falling_val = MAX77650_INT_GPI_F_MSK,
.type_rising_val = MAX77650_INT_GPI_R_MSK,
.types_supported = IRQ_TYPE_EDGE_BOTH,
},
},
REGMAP_IRQ_REG(MAX77650_INT_nEN_F,
MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_F_MSK),
REGMAP_IRQ_REG(MAX77650_INT_nEN_R,
MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_R_MSK),
REGMAP_IRQ_REG(MAX77650_INT_TJAL1_R,
MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL1_R_MSK),
REGMAP_IRQ_REG(MAX77650_INT_TJAL2_R,
MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL2_R_MSK),
REGMAP_IRQ_REG(MAX77650_INT_DOD_R,
MAX77650_INT_GLBL_OFFSET, MAX77650_INT_DOD_R_MSK),
REGMAP_IRQ_REG(MAX77650_INT_THM,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_THM_MSK),
REGMAP_IRQ_REG(MAX77650_INT_CHG,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHG_MSK),
REGMAP_IRQ_REG(MAX77650_INT_CHGIN,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_MSK),
REGMAP_IRQ_REG(MAX77650_INT_TJ_REG,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_TJ_REG_MSK),
REGMAP_IRQ_REG(MAX77650_INT_CHGIN_CTRL,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_CTRL_MSK),
REGMAP_IRQ_REG(MAX77650_INT_SYS_CTRL,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CTRL_MSK),
REGMAP_IRQ_REG(MAX77650_INT_SYS_CNFG,
MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CNFG_MSK),
};
static const struct regmap_irq_chip max77650_irq_chip = {
.name = "max77650-irq",
.irqs = max77650_irqs,
.num_irqs = ARRAY_SIZE(max77650_irqs),
.num_regs = 2,
.status_base = MAX77650_REG_INT_GLBL,
.mask_base = MAX77650_REG_INTM_GLBL,
.type_in_mask = true,
.type_invert = true,
.init_ack_masked = true,
.clear_on_unmask = true,
};
static const struct regmap_config max77650_regmap_config = {
.name = "max77650",
.reg_bits = 8,
.val_bits = 8,
};
static int max77650_i2c_probe(struct i2c_client *i2c)
{
struct regmap_irq_chip_data *irq_data;
struct device *dev = &i2c->dev;
struct irq_domain *domain;
struct regmap *map;
unsigned int val;
int rv, id;
map = devm_regmap_init_i2c(i2c, &max77650_regmap_config);
if (IS_ERR(map)) {
dev_err(dev, "Unable to initialise I2C Regmap\n");
return PTR_ERR(map);
}
rv = regmap_read(map, MAX77650_REG_CID, &val);
if (rv) {
dev_err(dev, "Unable to read Chip ID\n");
return rv;
}
id = MAX77650_CID_BITS(val);
switch (id) {
case MAX77650_CID_77650A:
case MAX77650_CID_77650C:
case MAX77650_CID_77651A:
case MAX77650_CID_77651B:
break;
default:
dev_err(dev, "Chip not supported - ID: 0x%02x\n", id);
return -ENODEV;
}
/*
* This IC has a low-power mode which reduces the quiescent current
* consumption to ~5.6uA but is only suitable for systems consuming
* less than ~2mA. Since this is not likely the case even on
* linux-based wearables - keep the chip in normal power mode.
*/
rv = regmap_update_bits(map,
MAX77650_REG_CNFG_GLBL,
MAX77650_SBIA_LPM_MASK,
MAX77650_SBIA_LPM_DISABLED);
if (rv) {
dev_err(dev, "Unable to change the power mode\n");
return rv;
}
rv = devm_regmap_add_irq_chip(dev, map, i2c->irq,
IRQF_ONESHOT | IRQF_SHARED, 0,
&max77650_irq_chip, &irq_data);
if (rv) {
dev_err(dev, "Unable to add Regmap IRQ chip\n");
return rv;
}
domain = regmap_irq_get_domain(irq_data);
return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
max77650_cells, ARRAY_SIZE(max77650_cells),
NULL, 0, domain);
}
static const struct of_device_id max77650_of_match[] = {
{ .compatible = "maxim,max77650" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_of_match);
static struct i2c_driver max77650_i2c_driver = {
.driver = {
.name = "max77650",
.of_match_table = max77650_of_match,
},
.probe_new = max77650_i2c_probe,
};
module_i2c_driver(max77650_i2c_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver");
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
MODULE_LICENSE("GPL v2");
|
