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c7f585fe JK |
1 | /* |
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> | |
c7f585fe | 18 | #include <linux/mfd/core.h> |
bc1aadc1 | 19 | #include <linux/mfd/max77693-common.h> |
c7f585fe JK |
20 | #include <linux/mfd/max77843-private.h> |
21 | #include <linux/of_device.h> | |
22 | #include <linux/platform_device.h> | |
23 | ||
24 | static 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 | ||
43 | static 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 | ||
49 | static const struct regmap_config max77843_regmap_config = { | |
50 | .reg_bits = 8, | |
51 | .val_bits = 8, | |
52 | .max_register = MAX77843_SYS_REG_END, | |
53 | }; | |
54 | ||
55 | static 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 | ||
63 | static 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. */ | |
bc1aadc1 | 74 | static int max77843_chg_init(struct max77693_dev *max77843) |
c7f585fe JK |
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"); | |
1b52e50f | 82 | return -ENODEV; |
c7f585fe JK |
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 | ||
95 | err_chg_i2c: | |
96 | i2c_unregister_device(max77843->i2c_chg); | |
97 | ||
98 | return ret; | |
99 | } | |
100 | ||
101 | static int max77843_probe(struct i2c_client *i2c, | |
102 | const struct i2c_device_id *id) | |
103 | { | |
bc1aadc1 | 104 | struct max77693_dev *max77843; |
c7f585fe JK |
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; | |
bc1aadc1 | 116 | max77843->type = id->driver_data; |
c7f585fe JK |
117 | |
118 | max77843->regmap = devm_regmap_init_i2c(i2c, | |
119 | &max77843_regmap_config); | |
120 | if (IS_ERR(max77843->regmap)) { | |
121 | dev_err(&i2c->dev, "Failed to allocate topsys register map\n"); | |
122 | return PTR_ERR(max77843->regmap); | |
123 | } | |
124 | ||
125 | ret = regmap_add_irq_chip(max77843->regmap, max77843->irq, | |
126 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
bc1aadc1 | 127 | 0, &max77843_irq_chip, &max77843->irq_data_topsys); |
c7f585fe JK |
128 | if (ret) { |
129 | dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n"); | |
130 | return ret; | |
131 | } | |
132 | ||
133 | ret = regmap_read(max77843->regmap, | |
134 | MAX77843_SYS_REG_PMICID, ®_data); | |
135 | if (ret < 0) { | |
136 | dev_err(&i2c->dev, "Failed to read PMIC ID\n"); | |
137 | goto err_pmic_id; | |
138 | } | |
139 | dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data); | |
140 | ||
141 | ret = max77843_chg_init(max77843); | |
142 | if (ret) { | |
143 | dev_err(&i2c->dev, "Failed to init Charger\n"); | |
144 | goto err_pmic_id; | |
145 | } | |
146 | ||
147 | ret = regmap_update_bits(max77843->regmap, | |
148 | MAX77843_SYS_REG_INTSRCMASK, | |
149 | MAX77843_INTSRC_MASK_MASK, | |
150 | (unsigned int)~MAX77843_INTSRC_MASK_MASK); | |
151 | if (ret < 0) { | |
152 | dev_err(&i2c->dev, "Failed to unmask interrupt source\n"); | |
153 | goto err_pmic_id; | |
154 | } | |
155 | ||
156 | ret = mfd_add_devices(max77843->dev, -1, max77843_devs, | |
157 | ARRAY_SIZE(max77843_devs), NULL, 0, NULL); | |
158 | if (ret < 0) { | |
159 | dev_err(&i2c->dev, "Failed to add mfd device\n"); | |
160 | goto err_pmic_id; | |
161 | } | |
162 | ||
163 | device_init_wakeup(max77843->dev, true); | |
164 | ||
165 | return 0; | |
166 | ||
167 | err_pmic_id: | |
bc1aadc1 | 168 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys); |
c7f585fe JK |
169 | |
170 | return ret; | |
171 | } | |
172 | ||
c7f585fe JK |
173 | static const struct of_device_id max77843_dt_match[] = { |
174 | { .compatible = "maxim,max77843", }, | |
175 | { }, | |
176 | }; | |
177 | ||
178 | static const struct i2c_device_id max77843_id[] = { | |
bc1aadc1 | 179 | { "max77843", TYPE_MAX77843, }, |
c7f585fe JK |
180 | { }, |
181 | }; | |
c7f585fe JK |
182 | |
183 | static int __maybe_unused max77843_suspend(struct device *dev) | |
184 | { | |
1b5420e1 | 185 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 186 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
187 | |
188 | disable_irq(max77843->irq); | |
189 | if (device_may_wakeup(dev)) | |
190 | enable_irq_wake(max77843->irq); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static int __maybe_unused max77843_resume(struct device *dev) | |
196 | { | |
1b5420e1 | 197 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 198 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
199 | |
200 | if (device_may_wakeup(dev)) | |
201 | disable_irq_wake(max77843->irq); | |
202 | enable_irq(max77843->irq); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume); | |
208 | ||
209 | static struct i2c_driver max77843_i2c_driver = { | |
210 | .driver = { | |
211 | .name = "max77843", | |
212 | .pm = &max77843_pm, | |
213 | .of_match_table = max77843_dt_match, | |
38f70da3 | 214 | .suppress_bind_attrs = true, |
c7f585fe JK |
215 | }, |
216 | .probe = max77843_probe, | |
c7f585fe JK |
217 | .id_table = max77843_id, |
218 | }; | |
219 | ||
220 | static int __init max77843_i2c_init(void) | |
221 | { | |
222 | return i2c_add_driver(&max77843_i2c_driver); | |
223 | } | |
224 | subsys_initcall(max77843_i2c_init); |