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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> | |
38f70da3 | 18 | #include <linux/init.h> |
c7f585fe | 19 | #include <linux/mfd/core.h> |
bc1aadc1 | 20 | #include <linux/mfd/max77693-common.h> |
c7f585fe JK |
21 | #include <linux/mfd/max77843-private.h> |
22 | #include <linux/of_device.h> | |
23 | #include <linux/platform_device.h> | |
24 | ||
25 | static const struct mfd_cell max77843_devs[] = { | |
26 | { | |
27 | .name = "max77843-muic", | |
28 | .of_compatible = "maxim,max77843-muic", | |
29 | }, { | |
30 | .name = "max77843-regulator", | |
31 | .of_compatible = "maxim,max77843-regulator", | |
32 | }, { | |
33 | .name = "max77843-charger", | |
34 | .of_compatible = "maxim,max77843-charger" | |
35 | }, { | |
36 | .name = "max77843-fuelgauge", | |
37 | .of_compatible = "maxim,max77843-fuelgauge", | |
38 | }, { | |
39 | .name = "max77843-haptic", | |
40 | .of_compatible = "maxim,max77843-haptic", | |
41 | }, | |
42 | }; | |
43 | ||
44 | static const struct regmap_config max77843_charger_regmap_config = { | |
45 | .reg_bits = 8, | |
46 | .val_bits = 8, | |
47 | .max_register = MAX77843_CHG_REG_END, | |
48 | }; | |
49 | ||
50 | static const struct regmap_config max77843_regmap_config = { | |
51 | .reg_bits = 8, | |
52 | .val_bits = 8, | |
53 | .max_register = MAX77843_SYS_REG_END, | |
54 | }; | |
55 | ||
56 | static const struct regmap_irq max77843_irqs[] = { | |
57 | /* TOPSYS interrupts */ | |
58 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, }, | |
59 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, }, | |
60 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, }, | |
61 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, }, | |
62 | }; | |
63 | ||
64 | static const struct regmap_irq_chip max77843_irq_chip = { | |
65 | .name = "max77843", | |
66 | .status_base = MAX77843_SYS_REG_SYSINTSRC, | |
67 | .mask_base = MAX77843_SYS_REG_SYSINTMASK, | |
68 | .mask_invert = false, | |
69 | .num_regs = 1, | |
70 | .irqs = max77843_irqs, | |
71 | .num_irqs = ARRAY_SIZE(max77843_irqs), | |
72 | }; | |
73 | ||
74 | /* Charger and Charger regulator use same regmap. */ | |
bc1aadc1 | 75 | static int max77843_chg_init(struct max77693_dev *max77843) |
c7f585fe JK |
76 | { |
77 | int ret; | |
78 | ||
79 | max77843->i2c_chg = i2c_new_dummy(max77843->i2c->adapter, I2C_ADDR_CHG); | |
80 | if (!max77843->i2c_chg) { | |
81 | dev_err(&max77843->i2c->dev, | |
82 | "Cannot allocate I2C device for Charger\n"); | |
1b52e50f | 83 | return -ENODEV; |
c7f585fe JK |
84 | } |
85 | i2c_set_clientdata(max77843->i2c_chg, max77843); | |
86 | ||
87 | max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg, | |
88 | &max77843_charger_regmap_config); | |
89 | if (IS_ERR(max77843->regmap_chg)) { | |
90 | ret = PTR_ERR(max77843->regmap_chg); | |
91 | goto err_chg_i2c; | |
92 | } | |
93 | ||
94 | return 0; | |
95 | ||
96 | err_chg_i2c: | |
97 | i2c_unregister_device(max77843->i2c_chg); | |
98 | ||
99 | return ret; | |
100 | } | |
101 | ||
102 | static int max77843_probe(struct i2c_client *i2c, | |
103 | const struct i2c_device_id *id) | |
104 | { | |
bc1aadc1 | 105 | struct max77693_dev *max77843; |
c7f585fe JK |
106 | unsigned int reg_data; |
107 | int ret; | |
108 | ||
109 | max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL); | |
110 | if (!max77843) | |
111 | return -ENOMEM; | |
112 | ||
113 | i2c_set_clientdata(i2c, max77843); | |
114 | max77843->dev = &i2c->dev; | |
115 | max77843->i2c = i2c; | |
116 | max77843->irq = i2c->irq; | |
bc1aadc1 | 117 | max77843->type = id->driver_data; |
c7f585fe JK |
118 | |
119 | max77843->regmap = devm_regmap_init_i2c(i2c, | |
120 | &max77843_regmap_config); | |
121 | if (IS_ERR(max77843->regmap)) { | |
122 | dev_err(&i2c->dev, "Failed to allocate topsys register map\n"); | |
123 | return PTR_ERR(max77843->regmap); | |
124 | } | |
125 | ||
126 | ret = regmap_add_irq_chip(max77843->regmap, max77843->irq, | |
127 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
bc1aadc1 | 128 | 0, &max77843_irq_chip, &max77843->irq_data_topsys); |
c7f585fe JK |
129 | if (ret) { |
130 | dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n"); | |
131 | return ret; | |
132 | } | |
133 | ||
134 | ret = regmap_read(max77843->regmap, | |
135 | MAX77843_SYS_REG_PMICID, ®_data); | |
136 | if (ret < 0) { | |
137 | dev_err(&i2c->dev, "Failed to read PMIC ID\n"); | |
138 | goto err_pmic_id; | |
139 | } | |
140 | dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data); | |
141 | ||
142 | ret = max77843_chg_init(max77843); | |
143 | if (ret) { | |
144 | dev_err(&i2c->dev, "Failed to init Charger\n"); | |
145 | goto err_pmic_id; | |
146 | } | |
147 | ||
148 | ret = regmap_update_bits(max77843->regmap, | |
149 | MAX77843_SYS_REG_INTSRCMASK, | |
150 | MAX77843_INTSRC_MASK_MASK, | |
151 | (unsigned int)~MAX77843_INTSRC_MASK_MASK); | |
152 | if (ret < 0) { | |
153 | dev_err(&i2c->dev, "Failed to unmask interrupt source\n"); | |
154 | goto err_pmic_id; | |
155 | } | |
156 | ||
157 | ret = mfd_add_devices(max77843->dev, -1, max77843_devs, | |
158 | ARRAY_SIZE(max77843_devs), NULL, 0, NULL); | |
159 | if (ret < 0) { | |
160 | dev_err(&i2c->dev, "Failed to add mfd device\n"); | |
161 | goto err_pmic_id; | |
162 | } | |
163 | ||
164 | device_init_wakeup(max77843->dev, true); | |
165 | ||
166 | return 0; | |
167 | ||
168 | err_pmic_id: | |
bc1aadc1 | 169 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys); |
c7f585fe JK |
170 | |
171 | return ret; | |
172 | } | |
173 | ||
c7f585fe JK |
174 | static const struct of_device_id max77843_dt_match[] = { |
175 | { .compatible = "maxim,max77843", }, | |
176 | { }, | |
177 | }; | |
178 | ||
179 | static const struct i2c_device_id max77843_id[] = { | |
bc1aadc1 | 180 | { "max77843", TYPE_MAX77843, }, |
c7f585fe JK |
181 | { }, |
182 | }; | |
c7f585fe JK |
183 | |
184 | static int __maybe_unused max77843_suspend(struct device *dev) | |
185 | { | |
1b5420e1 | 186 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 187 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
188 | |
189 | disable_irq(max77843->irq); | |
190 | if (device_may_wakeup(dev)) | |
191 | enable_irq_wake(max77843->irq); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static int __maybe_unused max77843_resume(struct device *dev) | |
197 | { | |
1b5420e1 | 198 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 199 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
200 | |
201 | if (device_may_wakeup(dev)) | |
202 | disable_irq_wake(max77843->irq); | |
203 | enable_irq(max77843->irq); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume); | |
209 | ||
210 | static struct i2c_driver max77843_i2c_driver = { | |
211 | .driver = { | |
212 | .name = "max77843", | |
213 | .pm = &max77843_pm, | |
214 | .of_match_table = max77843_dt_match, | |
38f70da3 | 215 | .suppress_bind_attrs = true, |
c7f585fe JK |
216 | }, |
217 | .probe = max77843_probe, | |
c7f585fe JK |
218 | .id_table = max77843_id, |
219 | }; | |
220 | ||
221 | static int __init max77843_i2c_init(void) | |
222 | { | |
223 | return i2c_add_driver(&max77843_i2c_driver); | |
224 | } | |
225 | subsys_initcall(max77843_i2c_init); |