blob: a354ac677ec7027fa427ce40dd034899b4204866 [file] [log] [blame]
Jaewon Kimc7f585f2015-03-02 19:10:34 +09001/*
2 * MFD core driver for the Maxim MAX77843
3 *
4 * Copyright (C) 2015 Samsung Electronics
5 * Author: Jaewon Kim <jaewon02.kim@samsung.com>
6 * Author: Beomho Seo <beomho.seo@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/err.h>
15#include <linux/i2c.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
18#include <linux/module.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/max77843-private.h>
21#include <linux/of_device.h>
22#include <linux/platform_device.h>
23
24static const struct mfd_cell max77843_devs[] = {
25 {
26 .name = "max77843-muic",
27 .of_compatible = "maxim,max77843-muic",
28 }, {
29 .name = "max77843-regulator",
30 .of_compatible = "maxim,max77843-regulator",
31 }, {
32 .name = "max77843-charger",
33 .of_compatible = "maxim,max77843-charger"
34 }, {
35 .name = "max77843-fuelgauge",
36 .of_compatible = "maxim,max77843-fuelgauge",
37 }, {
38 .name = "max77843-haptic",
39 .of_compatible = "maxim,max77843-haptic",
40 },
41};
42
43static const struct regmap_config max77843_charger_regmap_config = {
44 .reg_bits = 8,
45 .val_bits = 8,
46 .max_register = MAX77843_CHG_REG_END,
47};
48
49static const struct regmap_config max77843_regmap_config = {
50 .reg_bits = 8,
51 .val_bits = 8,
52 .max_register = MAX77843_SYS_REG_END,
53};
54
55static const struct regmap_irq max77843_irqs[] = {
56 /* TOPSYS interrupts */
57 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
58 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
59 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
60 { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
61};
62
63static const struct regmap_irq_chip max77843_irq_chip = {
64 .name = "max77843",
65 .status_base = MAX77843_SYS_REG_SYSINTSRC,
66 .mask_base = MAX77843_SYS_REG_SYSINTMASK,
67 .mask_invert = false,
68 .num_regs = 1,
69 .irqs = max77843_irqs,
70 .num_irqs = ARRAY_SIZE(max77843_irqs),
71};
72
73/* Charger and Charger regulator use same regmap. */
74static int max77843_chg_init(struct max77843 *max77843)
75{
76 int ret;
77
78 max77843->i2c_chg = i2c_new_dummy(max77843->i2c->adapter, I2C_ADDR_CHG);
79 if (!max77843->i2c_chg) {
80 dev_err(&max77843->i2c->dev,
81 "Cannot allocate I2C device for Charger\n");
82 return PTR_ERR(max77843->i2c_chg);
83 }
84 i2c_set_clientdata(max77843->i2c_chg, max77843);
85
86 max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
87 &max77843_charger_regmap_config);
88 if (IS_ERR(max77843->regmap_chg)) {
89 ret = PTR_ERR(max77843->regmap_chg);
90 goto err_chg_i2c;
91 }
92
93 return 0;
94
95err_chg_i2c:
96 i2c_unregister_device(max77843->i2c_chg);
97
98 return ret;
99}
100
101static int max77843_probe(struct i2c_client *i2c,
102 const struct i2c_device_id *id)
103{
104 struct max77843 *max77843;
105 unsigned int reg_data;
106 int ret;
107
108 max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
109 if (!max77843)
110 return -ENOMEM;
111
112 i2c_set_clientdata(i2c, max77843);
113 max77843->dev = &i2c->dev;
114 max77843->i2c = i2c;
115 max77843->irq = i2c->irq;
116
117 max77843->regmap = devm_regmap_init_i2c(i2c,
118 &max77843_regmap_config);
119 if (IS_ERR(max77843->regmap)) {
120 dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
121 return PTR_ERR(max77843->regmap);
122 }
123
124 ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
125 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
126 0, &max77843_irq_chip, &max77843->irq_data);
127 if (ret) {
128 dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
129 return ret;
130 }
131
132 ret = regmap_read(max77843->regmap,
133 MAX77843_SYS_REG_PMICID, &reg_data);
134 if (ret < 0) {
135 dev_err(&i2c->dev, "Failed to read PMIC ID\n");
136 goto err_pmic_id;
137 }
138 dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
139
140 ret = max77843_chg_init(max77843);
141 if (ret) {
142 dev_err(&i2c->dev, "Failed to init Charger\n");
143 goto err_pmic_id;
144 }
145
146 ret = regmap_update_bits(max77843->regmap,
147 MAX77843_SYS_REG_INTSRCMASK,
148 MAX77843_INTSRC_MASK_MASK,
149 (unsigned int)~MAX77843_INTSRC_MASK_MASK);
150 if (ret < 0) {
151 dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
152 goto err_pmic_id;
153 }
154
155 ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
156 ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
157 if (ret < 0) {
158 dev_err(&i2c->dev, "Failed to add mfd device\n");
159 goto err_pmic_id;
160 }
161
162 device_init_wakeup(max77843->dev, true);
163
164 return 0;
165
166err_pmic_id:
167 regmap_del_irq_chip(max77843->irq, max77843->irq_data);
168
169 return ret;
170}
171
172static int max77843_remove(struct i2c_client *i2c)
173{
174 struct max77843 *max77843 = i2c_get_clientdata(i2c);
175
176 mfd_remove_devices(max77843->dev);
177
178 regmap_del_irq_chip(max77843->irq, max77843->irq_data);
179
180 i2c_unregister_device(max77843->i2c_chg);
181
182 return 0;
183}
184
185static const struct of_device_id max77843_dt_match[] = {
186 { .compatible = "maxim,max77843", },
187 { },
188};
189
190static const struct i2c_device_id max77843_id[] = {
191 { "max77843", },
192 { },
193};
194MODULE_DEVICE_TABLE(i2c, max77843_id);
195
196static int __maybe_unused max77843_suspend(struct device *dev)
197{
198 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
199 struct max77843 *max77843 = i2c_get_clientdata(i2c);
200
201 disable_irq(max77843->irq);
202 if (device_may_wakeup(dev))
203 enable_irq_wake(max77843->irq);
204
205 return 0;
206}
207
208static int __maybe_unused max77843_resume(struct device *dev)
209{
210 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
211 struct max77843 *max77843 = i2c_get_clientdata(i2c);
212
213 if (device_may_wakeup(dev))
214 disable_irq_wake(max77843->irq);
215 enable_irq(max77843->irq);
216
217 return 0;
218}
219
220static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
221
222static struct i2c_driver max77843_i2c_driver = {
223 .driver = {
224 .name = "max77843",
225 .pm = &max77843_pm,
226 .of_match_table = max77843_dt_match,
227 },
228 .probe = max77843_probe,
229 .remove = max77843_remove,
230 .id_table = max77843_id,
231};
232
233static int __init max77843_i2c_init(void)
234{
235 return i2c_add_driver(&max77843_i2c_driver);
236}
237subsys_initcall(max77843_i2c_init);
238
239static void __exit max77843_i2c_exit(void)
240{
241 i2c_del_driver(&max77843_i2c_driver);
242}
243module_exit(max77843_i2c_exit);