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83871c00 CC |
1 | /* |
2 | * max77693.c - mfd core driver for the MAX 77693 | |
3 | * | |
4 | * Copyright (C) 2012 Samsung Electronics | |
5 | * SangYoung Son <hello.son@smasung.com> | |
6 | * | |
7 | * This program is not provided / owned by Maxim Integrated Products. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | * This driver is based on max8997.c | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/i2c.h> | |
29 | #include <linux/err.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/pm_runtime.h> | |
32 | #include <linux/mutex.h> | |
33 | #include <linux/mfd/core.h> | |
34 | #include <linux/mfd/max77693.h> | |
35 | #include <linux/mfd/max77693-private.h> | |
36 | #include <linux/regulator/machine.h> | |
37 | #include <linux/regmap.h> | |
38 | ||
39 | #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ | |
40 | #define I2C_ADDR_MUIC (0x4A >> 1) | |
41 | #define I2C_ADDR_HAPTIC (0x90 >> 1) | |
42 | ||
43 | static struct mfd_cell max77693_devs[] = { | |
44 | { .name = "max77693-pmic", }, | |
45 | { .name = "max77693-charger", }, | |
46 | { .name = "max77693-flash", }, | |
47 | { .name = "max77693-muic", }, | |
48 | { .name = "max77693-haptic", }, | |
49 | }; | |
50 | ||
51 | int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest) | |
52 | { | |
53 | unsigned int val; | |
54 | int ret; | |
55 | ||
56 | ret = regmap_read(map, reg, &val); | |
57 | *dest = val; | |
58 | ||
59 | return ret; | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(max77693_read_reg); | |
62 | ||
63 | int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf) | |
64 | { | |
65 | int ret; | |
66 | ||
67 | ret = regmap_bulk_read(map, reg, buf, count); | |
68 | ||
69 | return ret; | |
70 | } | |
71 | EXPORT_SYMBOL_GPL(max77693_bulk_read); | |
72 | ||
73 | int max77693_write_reg(struct regmap *map, u8 reg, u8 value) | |
74 | { | |
75 | int ret; | |
76 | ||
77 | ret = regmap_write(map, reg, value); | |
78 | ||
79 | return ret; | |
80 | } | |
81 | EXPORT_SYMBOL_GPL(max77693_write_reg); | |
82 | ||
83 | int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf) | |
84 | { | |
85 | int ret; | |
86 | ||
87 | ret = regmap_bulk_write(map, reg, buf, count); | |
88 | ||
89 | return ret; | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(max77693_bulk_write); | |
92 | ||
93 | int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask) | |
94 | { | |
95 | int ret; | |
96 | ||
97 | ret = regmap_update_bits(map, reg, mask, val); | |
98 | ||
99 | return ret; | |
100 | } | |
101 | EXPORT_SYMBOL_GPL(max77693_update_reg); | |
102 | ||
103 | static const struct regmap_config max77693_regmap_config = { | |
104 | .reg_bits = 8, | |
105 | .val_bits = 8, | |
106 | .max_register = MAX77693_PMIC_REG_END, | |
107 | }; | |
108 | ||
109 | static int max77693_i2c_probe(struct i2c_client *i2c, | |
110 | const struct i2c_device_id *id) | |
111 | { | |
112 | struct max77693_dev *max77693; | |
113 | struct max77693_platform_data *pdata = i2c->dev.platform_data; | |
114 | u8 reg_data; | |
115 | int ret = 0; | |
116 | ||
2429d863 AL |
117 | if (!pdata) { |
118 | dev_err(&i2c->dev, "No platform data found.\n"); | |
119 | return -EINVAL; | |
120 | } | |
121 | ||
83871c00 CC |
122 | max77693 = devm_kzalloc(&i2c->dev, |
123 | sizeof(struct max77693_dev), GFP_KERNEL); | |
124 | if (max77693 == NULL) | |
125 | return -ENOMEM; | |
126 | ||
83871c00 CC |
127 | i2c_set_clientdata(i2c, max77693); |
128 | max77693->dev = &i2c->dev; | |
129 | max77693->i2c = i2c; | |
130 | max77693->irq = i2c->irq; | |
131 | max77693->type = id->driver_data; | |
132 | ||
2429d863 AL |
133 | max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); |
134 | if (IS_ERR(max77693->regmap)) { | |
135 | ret = PTR_ERR(max77693->regmap); | |
136 | dev_err(max77693->dev, "failed to allocate register map: %d\n", | |
137 | ret); | |
138 | return ret; | |
139 | } | |
83871c00 CC |
140 | |
141 | max77693->wakeup = pdata->wakeup; | |
142 | ||
2429d863 AL |
143 | ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, |
144 | ®_data); | |
145 | if (ret < 0) { | |
83871c00 | 146 | dev_err(max77693->dev, "device not found on this channel\n"); |
2429d863 | 147 | return ret; |
83871c00 CC |
148 | } else |
149 | dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); | |
150 | ||
151 | max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); | |
152 | i2c_set_clientdata(max77693->muic, max77693); | |
153 | ||
154 | max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); | |
155 | i2c_set_clientdata(max77693->haptic, max77693); | |
156 | ||
b186b124 CC |
157 | /* |
158 | * Initialize register map for MUIC device because use regmap-muic | |
159 | * instance of MUIC device when irq of max77693 is initialized | |
160 | * before call max77693-muic probe() function. | |
161 | */ | |
162 | max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, | |
163 | &max77693_regmap_config); | |
164 | if (IS_ERR(max77693->regmap_muic)) { | |
165 | ret = PTR_ERR(max77693->regmap_muic); | |
166 | dev_err(max77693->dev, | |
167 | "failed to allocate register map: %d\n", ret); | |
2429d863 | 168 | goto err_regmap_muic; |
b186b124 CC |
169 | } |
170 | ||
6592ebb3 CC |
171 | ret = max77693_irq_init(max77693); |
172 | if (ret < 0) | |
ff2b7ac6 | 173 | goto err_irq; |
6592ebb3 | 174 | |
83871c00 CC |
175 | pm_runtime_set_active(max77693->dev); |
176 | ||
177 | ret = mfd_add_devices(max77693->dev, -1, max77693_devs, | |
0848c94f | 178 | ARRAY_SIZE(max77693_devs), NULL, 0, NULL); |
83871c00 CC |
179 | if (ret < 0) |
180 | goto err_mfd; | |
181 | ||
6592ebb3 CC |
182 | device_init_wakeup(max77693->dev, pdata->wakeup); |
183 | ||
83871c00 CC |
184 | return ret; |
185 | ||
186 | err_mfd: | |
ff2b7ac6 AL |
187 | max77693_irq_exit(max77693); |
188 | err_irq: | |
2429d863 | 189 | err_regmap_muic: |
83871c00 CC |
190 | i2c_unregister_device(max77693->muic); |
191 | i2c_unregister_device(max77693->haptic); | |
83871c00 CC |
192 | return ret; |
193 | } | |
194 | ||
195 | static int max77693_i2c_remove(struct i2c_client *i2c) | |
196 | { | |
197 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); | |
198 | ||
199 | mfd_remove_devices(max77693->dev); | |
ff2b7ac6 | 200 | max77693_irq_exit(max77693); |
83871c00 CC |
201 | i2c_unregister_device(max77693->muic); |
202 | i2c_unregister_device(max77693->haptic); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static const struct i2c_device_id max77693_i2c_id[] = { | |
208 | { "max77693", TYPE_MAX77693 }, | |
209 | { } | |
210 | }; | |
211 | MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); | |
212 | ||
6592ebb3 CC |
213 | static int max77693_suspend(struct device *dev) |
214 | { | |
215 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
216 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); | |
217 | ||
218 | if (device_may_wakeup(dev)) | |
219 | irq_set_irq_wake(max77693->irq, 1); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static int max77693_resume(struct device *dev) | |
224 | { | |
225 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
226 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); | |
227 | ||
228 | if (device_may_wakeup(dev)) | |
229 | irq_set_irq_wake(max77693->irq, 0); | |
230 | return max77693_irq_resume(max77693); | |
231 | } | |
232 | ||
12477a32 | 233 | static const struct dev_pm_ops max77693_pm = { |
6592ebb3 CC |
234 | .suspend = max77693_suspend, |
235 | .resume = max77693_resume, | |
236 | }; | |
237 | ||
83871c00 CC |
238 | static struct i2c_driver max77693_i2c_driver = { |
239 | .driver = { | |
240 | .name = "max77693", | |
241 | .owner = THIS_MODULE, | |
6592ebb3 | 242 | .pm = &max77693_pm, |
83871c00 CC |
243 | }, |
244 | .probe = max77693_i2c_probe, | |
245 | .remove = max77693_i2c_remove, | |
246 | .id_table = max77693_i2c_id, | |
247 | }; | |
248 | ||
249 | static int __init max77693_i2c_init(void) | |
250 | { | |
251 | return i2c_add_driver(&max77693_i2c_driver); | |
252 | } | |
253 | /* init early so consumer devices can complete system boot */ | |
254 | subsys_initcall(max77693_i2c_init); | |
255 | ||
256 | static void __exit max77693_i2c_exit(void) | |
257 | { | |
258 | i2c_del_driver(&max77693_i2c_driver); | |
259 | } | |
260 | module_exit(max77693_i2c_exit); | |
261 | ||
262 | MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); | |
263 | MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); | |
264 | MODULE_LICENSE("GPL"); |