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1// SPDX-License-Identifier: GPL-2.0+
2//
3// MFD core driver for the Maxim MAX77843
4//
5// Copyright (C) 2015 Samsung Electronics
6// Author: Jaewon Kim <[email protected]>
7// Author: Beomho Seo <[email protected]>
8
9#include <linux/err.h>
10#include <linux/i2c.h>
11#include <linux/init.h>
12#include <linux/interrupt.h>
13#include <linux/mfd/core.h>
14#include <linux/mfd/max77693-common.h>
15#include <linux/mfd/max77843-private.h>
16#include <linux/platform_device.h>
17
18static const struct mfd_cell max77843_devs[] = {
19 {
20 .name = "max77843-muic",
21 .of_compatible = "maxim,max77843-muic",
22 }, {
23 .name = "max77843-regulator",
24 .of_compatible = "maxim,max77843-regulator",
25 }, {
26 .name = "max77843-charger",
27 .of_compatible = "maxim,max77843-charger"
28 }, {
29 .name = "max77843-fuelgauge",
30 .of_compatible = "maxim,max77843-fuelgauge",
31 }, {
32 .name = "max77843-haptic",
33 .of_compatible = "maxim,max77843-haptic",
34 },
35};
36
37static const struct regmap_config max77843_charger_regmap_config = {
38 .reg_bits = 8,
39 .val_bits = 8,
40 .max_register = MAX77843_CHG_REG_END,
41};
42
43static const struct regmap_config max77843_regmap_config = {
44 .reg_bits = 8,
45 .val_bits = 8,
46 .max_register = MAX77843_SYS_REG_END,
47};
48
49static const struct regmap_irq max77843_irqs[] = {
50 /* TOPSYS interrupts */
51 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
52 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
53 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
54 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
55};
56
57static const struct regmap_irq_chip max77843_irq_chip = {
58 .name = "max77843",
59 .status_base = MAX77843_SYS_REG_SYSINTSRC,
60 .mask_base = MAX77843_SYS_REG_SYSINTMASK,
61 .num_regs = 1,
62 .irqs = max77843_irqs,
63 .num_irqs = ARRAY_SIZE(max77843_irqs),
64};
65
66/* Charger and Charger regulator use same regmap. */
67static int max77843_chg_init(struct max77693_dev *max77843)
68{
69 int ret;
70
71 max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
72 if (IS_ERR(max77843->i2c_chg)) {
73 dev_err(&max77843->i2c->dev,
74 "Cannot allocate I2C device for Charger\n");
75 return PTR_ERR(max77843->i2c_chg);
76 }
77 i2c_set_clientdata(max77843->i2c_chg, max77843);
78
79 max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
80 &max77843_charger_regmap_config);
81 if (IS_ERR(max77843->regmap_chg)) {
82 ret = PTR_ERR(max77843->regmap_chg);
83 goto err_chg_i2c;
84 }
85
86 return 0;
87
88err_chg_i2c:
89 i2c_unregister_device(max77843->i2c_chg);
90
91 return ret;
92}
93
94static int max77843_probe(struct i2c_client *i2c)
95{
96 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
97 struct max77693_dev *max77843;
98 unsigned int reg_data;
99 int ret;
100
101 max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
102 if (!max77843)
103 return -ENOMEM;
104
105 i2c_set_clientdata(i2c, max77843);
106 max77843->dev = &i2c->dev;
107 max77843->i2c = i2c;
108 max77843->irq = i2c->irq;
109 max77843->type = id->driver_data;
110
111 max77843->regmap = devm_regmap_init_i2c(i2c,
112 &max77843_regmap_config);
113 if (IS_ERR(max77843->regmap)) {
114 dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
115 return PTR_ERR(max77843->regmap);
116 }
117
118 ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
119 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
120 0, &max77843_irq_chip, &max77843->irq_data_topsys);
121 if (ret) {
122 dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
123 return ret;
124 }
125
126 ret = regmap_read(max77843->regmap,
127 MAX77843_SYS_REG_PMICID, &reg_data);
128 if (ret < 0) {
129 dev_err(&i2c->dev, "Failed to read PMIC ID\n");
130 goto err_pmic_id;
131 }
132 dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
133
134 ret = max77843_chg_init(max77843);
135 if (ret) {
136 dev_err(&i2c->dev, "Failed to init Charger\n");
137 goto err_pmic_id;
138 }
139
140 ret = regmap_update_bits(max77843->regmap,
141 MAX77843_SYS_REG_INTSRCMASK,
142 MAX77843_INTSRC_MASK_MASK,
143 (unsigned int)~MAX77843_INTSRC_MASK_MASK);
144 if (ret < 0) {
145 dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
146 goto err_pmic_id;
147 }
148
149 ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
150 ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
151 if (ret < 0) {
152 dev_err(&i2c->dev, "Failed to add mfd device\n");
153 goto err_pmic_id;
154 }
155
156 device_init_wakeup(max77843->dev, true);
157
158 return 0;
159
160err_pmic_id:
161 regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
162
163 return ret;
164}
165
166static const struct of_device_id max77843_dt_match[] = {
167 { .compatible = "maxim,max77843", },
168 { },
169};
170
171static const struct i2c_device_id max77843_id[] = {
172 { "max77843", TYPE_MAX77843, },
173 { },
174};
175
176static int __maybe_unused max77843_suspend(struct device *dev)
177{
178 struct i2c_client *i2c = to_i2c_client(dev);
179 struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
180
181 disable_irq(max77843->irq);
182 if (device_may_wakeup(dev))
183 enable_irq_wake(max77843->irq);
184
185 return 0;
186}
187
188static int __maybe_unused max77843_resume(struct device *dev)
189{
190 struct i2c_client *i2c = to_i2c_client(dev);
191 struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
192
193 if (device_may_wakeup(dev))
194 disable_irq_wake(max77843->irq);
195 enable_irq(max77843->irq);
196
197 return 0;
198}
199
200static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
201
202static struct i2c_driver max77843_i2c_driver = {
203 .driver = {
204 .name = "max77843",
205 .pm = &max77843_pm,
206 .of_match_table = max77843_dt_match,
207 .suppress_bind_attrs = true,
208 },
209 .probe = max77843_probe,
210 .id_table = max77843_id,
211};
212
213static int __init max77843_i2c_init(void)
214{
215 return i2c_add_driver(&max77843_i2c_driver);
216}
217subsys_initcall(max77843_i2c_init);