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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 <jaewon02.kim@samsung.com> | |
7 | // Author: Beomho Seo <beomho.seo@samsung.com> | |
c7f585fe JK |
8 | |
9 | #include <linux/err.h> | |
10 | #include <linux/i2c.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
c7f585fe | 13 | #include <linux/mfd/core.h> |
bc1aadc1 | 14 | #include <linux/mfd/max77693-common.h> |
c7f585fe JK |
15 | #include <linux/mfd/max77843-private.h> |
16 | #include <linux/of_device.h> | |
17 | #include <linux/platform_device.h> | |
18 | ||
19 | static const struct mfd_cell max77843_devs[] = { | |
20 | { | |
21 | .name = "max77843-muic", | |
22 | .of_compatible = "maxim,max77843-muic", | |
23 | }, { | |
24 | .name = "max77843-regulator", | |
25 | .of_compatible = "maxim,max77843-regulator", | |
26 | }, { | |
27 | .name = "max77843-charger", | |
28 | .of_compatible = "maxim,max77843-charger" | |
29 | }, { | |
30 | .name = "max77843-fuelgauge", | |
31 | .of_compatible = "maxim,max77843-fuelgauge", | |
32 | }, { | |
33 | .name = "max77843-haptic", | |
34 | .of_compatible = "maxim,max77843-haptic", | |
35 | }, | |
36 | }; | |
37 | ||
38 | static const struct regmap_config max77843_charger_regmap_config = { | |
39 | .reg_bits = 8, | |
40 | .val_bits = 8, | |
41 | .max_register = MAX77843_CHG_REG_END, | |
42 | }; | |
43 | ||
44 | static const struct regmap_config max77843_regmap_config = { | |
45 | .reg_bits = 8, | |
46 | .val_bits = 8, | |
47 | .max_register = MAX77843_SYS_REG_END, | |
48 | }; | |
49 | ||
50 | static const struct regmap_irq max77843_irqs[] = { | |
51 | /* TOPSYS interrupts */ | |
52 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, }, | |
53 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, }, | |
54 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, }, | |
55 | { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, }, | |
56 | }; | |
57 | ||
58 | static const struct regmap_irq_chip max77843_irq_chip = { | |
59 | .name = "max77843", | |
60 | .status_base = MAX77843_SYS_REG_SYSINTSRC, | |
61 | .mask_base = MAX77843_SYS_REG_SYSINTMASK, | |
62 | .mask_invert = false, | |
63 | .num_regs = 1, | |
64 | .irqs = max77843_irqs, | |
65 | .num_irqs = ARRAY_SIZE(max77843_irqs), | |
66 | }; | |
67 | ||
68 | /* Charger and Charger regulator use same regmap. */ | |
bc1aadc1 | 69 | static int max77843_chg_init(struct max77693_dev *max77843) |
c7f585fe JK |
70 | { |
71 | int ret; | |
72 | ||
0005a9e1 WS |
73 | max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG); |
74 | if (IS_ERR(max77843->i2c_chg)) { | |
c7f585fe JK |
75 | dev_err(&max77843->i2c->dev, |
76 | "Cannot allocate I2C device for Charger\n"); | |
0005a9e1 | 77 | return PTR_ERR(max77843->i2c_chg); |
c7f585fe JK |
78 | } |
79 | i2c_set_clientdata(max77843->i2c_chg, max77843); | |
80 | ||
81 | max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg, | |
82 | &max77843_charger_regmap_config); | |
83 | if (IS_ERR(max77843->regmap_chg)) { | |
84 | ret = PTR_ERR(max77843->regmap_chg); | |
85 | goto err_chg_i2c; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | ||
90 | err_chg_i2c: | |
91 | i2c_unregister_device(max77843->i2c_chg); | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
96 | static int max77843_probe(struct i2c_client *i2c, | |
97 | const struct i2c_device_id *id) | |
98 | { | |
bc1aadc1 | 99 | struct max77693_dev *max77843; |
c7f585fe JK |
100 | unsigned int reg_data; |
101 | int ret; | |
102 | ||
103 | max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL); | |
104 | if (!max77843) | |
105 | return -ENOMEM; | |
106 | ||
107 | i2c_set_clientdata(i2c, max77843); | |
108 | max77843->dev = &i2c->dev; | |
109 | max77843->i2c = i2c; | |
110 | max77843->irq = i2c->irq; | |
bc1aadc1 | 111 | max77843->type = id->driver_data; |
c7f585fe JK |
112 | |
113 | max77843->regmap = devm_regmap_init_i2c(i2c, | |
114 | &max77843_regmap_config); | |
115 | if (IS_ERR(max77843->regmap)) { | |
116 | dev_err(&i2c->dev, "Failed to allocate topsys register map\n"); | |
117 | return PTR_ERR(max77843->regmap); | |
118 | } | |
119 | ||
120 | ret = regmap_add_irq_chip(max77843->regmap, max77843->irq, | |
121 | IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, | |
bc1aadc1 | 122 | 0, &max77843_irq_chip, &max77843->irq_data_topsys); |
c7f585fe JK |
123 | if (ret) { |
124 | dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n"); | |
125 | return ret; | |
126 | } | |
127 | ||
128 | ret = regmap_read(max77843->regmap, | |
129 | MAX77843_SYS_REG_PMICID, ®_data); | |
130 | if (ret < 0) { | |
131 | dev_err(&i2c->dev, "Failed to read PMIC ID\n"); | |
132 | goto err_pmic_id; | |
133 | } | |
134 | dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data); | |
135 | ||
136 | ret = max77843_chg_init(max77843); | |
137 | if (ret) { | |
138 | dev_err(&i2c->dev, "Failed to init Charger\n"); | |
139 | goto err_pmic_id; | |
140 | } | |
141 | ||
142 | ret = regmap_update_bits(max77843->regmap, | |
143 | MAX77843_SYS_REG_INTSRCMASK, | |
144 | MAX77843_INTSRC_MASK_MASK, | |
145 | (unsigned int)~MAX77843_INTSRC_MASK_MASK); | |
146 | if (ret < 0) { | |
147 | dev_err(&i2c->dev, "Failed to unmask interrupt source\n"); | |
148 | goto err_pmic_id; | |
149 | } | |
150 | ||
151 | ret = mfd_add_devices(max77843->dev, -1, max77843_devs, | |
152 | ARRAY_SIZE(max77843_devs), NULL, 0, NULL); | |
153 | if (ret < 0) { | |
154 | dev_err(&i2c->dev, "Failed to add mfd device\n"); | |
155 | goto err_pmic_id; | |
156 | } | |
157 | ||
158 | device_init_wakeup(max77843->dev, true); | |
159 | ||
160 | return 0; | |
161 | ||
162 | err_pmic_id: | |
bc1aadc1 | 163 | regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys); |
c7f585fe JK |
164 | |
165 | return ret; | |
166 | } | |
167 | ||
c7f585fe JK |
168 | static const struct of_device_id max77843_dt_match[] = { |
169 | { .compatible = "maxim,max77843", }, | |
170 | { }, | |
171 | }; | |
172 | ||
173 | static const struct i2c_device_id max77843_id[] = { | |
bc1aadc1 | 174 | { "max77843", TYPE_MAX77843, }, |
c7f585fe JK |
175 | { }, |
176 | }; | |
c7f585fe JK |
177 | |
178 | static int __maybe_unused max77843_suspend(struct device *dev) | |
179 | { | |
1b5420e1 | 180 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 181 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
182 | |
183 | disable_irq(max77843->irq); | |
184 | if (device_may_wakeup(dev)) | |
185 | enable_irq_wake(max77843->irq); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static int __maybe_unused max77843_resume(struct device *dev) | |
191 | { | |
1b5420e1 | 192 | struct i2c_client *i2c = to_i2c_client(dev); |
bc1aadc1 | 193 | struct max77693_dev *max77843 = i2c_get_clientdata(i2c); |
c7f585fe JK |
194 | |
195 | if (device_may_wakeup(dev)) | |
196 | disable_irq_wake(max77843->irq); | |
197 | enable_irq(max77843->irq); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume); | |
203 | ||
204 | static struct i2c_driver max77843_i2c_driver = { | |
205 | .driver = { | |
206 | .name = "max77843", | |
207 | .pm = &max77843_pm, | |
208 | .of_match_table = max77843_dt_match, | |
38f70da3 | 209 | .suppress_bind_attrs = true, |
c7f585fe JK |
210 | }, |
211 | .probe = max77843_probe, | |
c7f585fe JK |
212 | .id_table = max77843_id, |
213 | }; | |
214 | ||
215 | static int __init max77843_i2c_init(void) | |
216 | { | |
217 | return i2c_add_driver(&max77843_i2c_driver); | |
218 | } | |
219 | subsys_initcall(max77843_i2c_init); |