Commit | Line | Data |
---|---|---|
156f2528 | 1 | /* |
2c7e6f57 | 2 | * max8998.c - mfd core driver for the Maxim 8998 |
156f2528 KP |
3 | * |
4 | * Copyright (C) 2009-2010 Samsung Electronics | |
5 | * Kyungmin Park <kyungmin.park@samsung.com> | |
6 | * Marek Szyprowski <m.szyprowski@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 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/i2c.h> | |
cdd137c9 MH |
28 | #include <linux/interrupt.h> |
29 | #include <linux/pm_runtime.h> | |
156f2528 KP |
30 | #include <linux/mutex.h> |
31 | #include <linux/mfd/core.h> | |
32 | #include <linux/mfd/max8998.h> | |
33 | #include <linux/mfd/max8998-private.h> | |
34 | ||
9b16c0a4 JS |
35 | #define RTC_I2C_ADDR (0x0c >> 1) |
36 | ||
156f2528 KP |
37 | static struct mfd_cell max8998_devs[] = { |
38 | { | |
39 | .name = "max8998-pmic", | |
9b16c0a4 JS |
40 | }, { |
41 | .name = "max8998-rtc", | |
bb4ce970 DK |
42 | }, { |
43 | .name = "max8998-battery", | |
9b16c0a4 | 44 | }, |
156f2528 KP |
45 | }; |
46 | ||
337ce5d1 MH |
47 | static struct mfd_cell lp3974_devs[] = { |
48 | { | |
49 | .name = "lp3974-pmic", | |
50 | }, { | |
51 | .name = "lp3974-rtc", | |
52 | }, | |
53 | }; | |
54 | ||
676e02d7 | 55 | int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) |
156f2528 | 56 | { |
676e02d7 | 57 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
58 | int ret; |
59 | ||
60 | mutex_lock(&max8998->iolock); | |
676e02d7 | 61 | ret = i2c_smbus_read_byte_data(i2c, reg); |
156f2528 KP |
62 | mutex_unlock(&max8998->iolock); |
63 | if (ret < 0) | |
64 | return ret; | |
65 | ||
66 | ret &= 0xff; | |
67 | *dest = ret; | |
68 | return 0; | |
69 | } | |
676e02d7 | 70 | EXPORT_SYMBOL(max8998_read_reg); |
156f2528 | 71 | |
2c7e6f57 JS |
72 | int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) |
73 | { | |
74 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
75 | int ret; | |
76 | ||
77 | mutex_lock(&max8998->iolock); | |
78 | ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); | |
79 | mutex_unlock(&max8998->iolock); | |
80 | if (ret < 0) | |
81 | return ret; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | EXPORT_SYMBOL(max8998_bulk_read); | |
86 | ||
676e02d7 | 87 | int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value) |
156f2528 | 88 | { |
676e02d7 | 89 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
90 | int ret; |
91 | ||
92 | mutex_lock(&max8998->iolock); | |
676e02d7 | 93 | ret = i2c_smbus_write_byte_data(i2c, reg, value); |
156f2528 KP |
94 | mutex_unlock(&max8998->iolock); |
95 | return ret; | |
96 | } | |
676e02d7 | 97 | EXPORT_SYMBOL(max8998_write_reg); |
156f2528 | 98 | |
9b16c0a4 JS |
99 | int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) |
100 | { | |
101 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
102 | int ret; | |
103 | ||
104 | mutex_lock(&max8998->iolock); | |
105 | ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); | |
106 | mutex_unlock(&max8998->iolock); | |
107 | if (ret < 0) | |
108 | return ret; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | EXPORT_SYMBOL(max8998_bulk_write); | |
113 | ||
676e02d7 | 114 | int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) |
156f2528 | 115 | { |
676e02d7 | 116 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); |
156f2528 KP |
117 | int ret; |
118 | ||
119 | mutex_lock(&max8998->iolock); | |
676e02d7 | 120 | ret = i2c_smbus_read_byte_data(i2c, reg); |
156f2528 KP |
121 | if (ret >= 0) { |
122 | u8 old_val = ret & 0xff; | |
123 | u8 new_val = (val & mask) | (old_val & (~mask)); | |
676e02d7 | 124 | ret = i2c_smbus_write_byte_data(i2c, reg, new_val); |
156f2528 KP |
125 | } |
126 | mutex_unlock(&max8998->iolock); | |
127 | return ret; | |
128 | } | |
676e02d7 | 129 | EXPORT_SYMBOL(max8998_update_reg); |
156f2528 KP |
130 | |
131 | static int max8998_i2c_probe(struct i2c_client *i2c, | |
132 | const struct i2c_device_id *id) | |
133 | { | |
2c7e6f57 | 134 | struct max8998_platform_data *pdata = i2c->dev.platform_data; |
156f2528 KP |
135 | struct max8998_dev *max8998; |
136 | int ret = 0; | |
137 | ||
138 | max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL); | |
8f1f151e | 139 | if (max8998 == NULL) |
156f2528 | 140 | return -ENOMEM; |
156f2528 KP |
141 | |
142 | i2c_set_clientdata(i2c, max8998); | |
143 | max8998->dev = &i2c->dev; | |
676e02d7 | 144 | max8998->i2c = i2c; |
2c7e6f57 | 145 | max8998->irq = i2c->irq; |
509bd476 | 146 | max8998->type = id->driver_data; |
2c7e6f57 JS |
147 | if (pdata) { |
148 | max8998->ono = pdata->ono; | |
149 | max8998->irq_base = pdata->irq_base; | |
cdd137c9 | 150 | max8998->wakeup = pdata->wakeup; |
2c7e6f57 | 151 | } |
156f2528 KP |
152 | mutex_init(&max8998->iolock); |
153 | ||
9b16c0a4 JS |
154 | max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); |
155 | i2c_set_clientdata(max8998->rtc, max8998); | |
156 | ||
2c7e6f57 JS |
157 | max8998_irq_init(max8998); |
158 | ||
cdd137c9 MH |
159 | pm_runtime_set_active(max8998->dev); |
160 | ||
337ce5d1 MH |
161 | switch (id->driver_data) { |
162 | case TYPE_LP3974: | |
163 | ret = mfd_add_devices(max8998->dev, -1, | |
164 | lp3974_devs, ARRAY_SIZE(lp3974_devs), | |
165 | NULL, 0); | |
166 | break; | |
167 | case TYPE_MAX8998: | |
168 | ret = mfd_add_devices(max8998->dev, -1, | |
169 | max8998_devs, ARRAY_SIZE(max8998_devs), | |
170 | NULL, 0); | |
171 | break; | |
172 | default: | |
173 | ret = -EINVAL; | |
174 | } | |
175 | ||
156f2528 KP |
176 | if (ret < 0) |
177 | goto err; | |
178 | ||
7ef73598 JC |
179 | device_init_wakeup(max8998->dev, max8998->wakeup); |
180 | ||
156f2528 KP |
181 | return ret; |
182 | ||
183 | err: | |
184 | mfd_remove_devices(max8998->dev); | |
7484552e AL |
185 | max8998_irq_exit(max8998); |
186 | i2c_unregister_device(max8998->rtc); | |
156f2528 KP |
187 | kfree(max8998); |
188 | return ret; | |
189 | } | |
190 | ||
191 | static int max8998_i2c_remove(struct i2c_client *i2c) | |
192 | { | |
193 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
194 | ||
195 | mfd_remove_devices(max8998->dev); | |
7484552e AL |
196 | max8998_irq_exit(max8998); |
197 | i2c_unregister_device(max8998->rtc); | |
156f2528 KP |
198 | kfree(max8998); |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static const struct i2c_device_id max8998_i2c_id[] = { | |
509bd476 LM |
204 | { "max8998", TYPE_MAX8998 }, |
205 | { "lp3974", TYPE_LP3974}, | |
f8539ddc | 206 | { } |
156f2528 KP |
207 | }; |
208 | MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); | |
209 | ||
cdd137c9 MH |
210 | static int max8998_suspend(struct device *dev) |
211 | { | |
212 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
213 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
214 | ||
7ef73598 | 215 | if (device_may_wakeup(dev)) |
d5bb1221 | 216 | irq_set_irq_wake(max8998->irq, 1); |
cdd137c9 MH |
217 | return 0; |
218 | } | |
219 | ||
220 | static int max8998_resume(struct device *dev) | |
221 | { | |
222 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
223 | struct max8998_dev *max8998 = i2c_get_clientdata(i2c); | |
224 | ||
7ef73598 | 225 | if (device_may_wakeup(dev)) |
d5bb1221 | 226 | irq_set_irq_wake(max8998->irq, 0); |
cdd137c9 MH |
227 | /* |
228 | * In LP3974, if IRQ registers are not "read & clear" | |
229 | * when it's set during sleep, the interrupt becomes | |
230 | * disabled. | |
231 | */ | |
232 | return max8998_irq_resume(i2c_get_clientdata(i2c)); | |
233 | } | |
234 | ||
235 | struct max8998_reg_dump { | |
236 | u8 addr; | |
237 | u8 val; | |
238 | }; | |
239 | #define SAVE_ITEM(x) { .addr = (x), .val = 0x0, } | |
44be0a40 | 240 | static struct max8998_reg_dump max8998_dump[] = { |
cdd137c9 MH |
241 | SAVE_ITEM(MAX8998_REG_IRQM1), |
242 | SAVE_ITEM(MAX8998_REG_IRQM2), | |
243 | SAVE_ITEM(MAX8998_REG_IRQM3), | |
244 | SAVE_ITEM(MAX8998_REG_IRQM4), | |
245 | SAVE_ITEM(MAX8998_REG_STATUSM1), | |
246 | SAVE_ITEM(MAX8998_REG_STATUSM2), | |
247 | SAVE_ITEM(MAX8998_REG_CHGR1), | |
248 | SAVE_ITEM(MAX8998_REG_CHGR2), | |
249 | SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1), | |
250 | SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1), | |
251 | SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3), | |
252 | SAVE_ITEM(MAX8998_REG_ONOFF1), | |
253 | SAVE_ITEM(MAX8998_REG_ONOFF2), | |
254 | SAVE_ITEM(MAX8998_REG_ONOFF3), | |
255 | SAVE_ITEM(MAX8998_REG_ONOFF4), | |
256 | SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1), | |
257 | SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2), | |
258 | SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3), | |
259 | SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4), | |
260 | SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1), | |
261 | SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2), | |
262 | SAVE_ITEM(MAX8998_REG_LDO2_LDO3), | |
263 | SAVE_ITEM(MAX8998_REG_LDO4), | |
264 | SAVE_ITEM(MAX8998_REG_LDO5), | |
265 | SAVE_ITEM(MAX8998_REG_LDO6), | |
266 | SAVE_ITEM(MAX8998_REG_LDO7), | |
267 | SAVE_ITEM(MAX8998_REG_LDO8_LDO9), | |
268 | SAVE_ITEM(MAX8998_REG_LDO10_LDO11), | |
269 | SAVE_ITEM(MAX8998_REG_LDO12), | |
270 | SAVE_ITEM(MAX8998_REG_LDO13), | |
271 | SAVE_ITEM(MAX8998_REG_LDO14), | |
272 | SAVE_ITEM(MAX8998_REG_LDO15), | |
273 | SAVE_ITEM(MAX8998_REG_LDO16), | |
274 | SAVE_ITEM(MAX8998_REG_LDO17), | |
275 | SAVE_ITEM(MAX8998_REG_BKCHR), | |
276 | SAVE_ITEM(MAX8998_REG_LBCNFG1), | |
277 | SAVE_ITEM(MAX8998_REG_LBCNFG2), | |
278 | }; | |
279 | /* Save registers before hibernation */ | |
280 | static int max8998_freeze(struct device *dev) | |
281 | { | |
282 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
283 | int i; | |
284 | ||
285 | for (i = 0; i < ARRAY_SIZE(max8998_dump); i++) | |
286 | max8998_read_reg(i2c, max8998_dump[i].addr, | |
287 | &max8998_dump[i].val); | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | /* Restore registers after hibernation */ | |
293 | static int max8998_restore(struct device *dev) | |
294 | { | |
295 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
296 | int i; | |
297 | ||
298 | for (i = 0; i < ARRAY_SIZE(max8998_dump); i++) | |
299 | max8998_write_reg(i2c, max8998_dump[i].addr, | |
300 | max8998_dump[i].val); | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
44be0a40 | 305 | static const struct dev_pm_ops max8998_pm = { |
cdd137c9 MH |
306 | .suspend = max8998_suspend, |
307 | .resume = max8998_resume, | |
308 | .freeze = max8998_freeze, | |
309 | .restore = max8998_restore, | |
310 | }; | |
311 | ||
156f2528 KP |
312 | static struct i2c_driver max8998_i2c_driver = { |
313 | .driver = { | |
314 | .name = "max8998", | |
315 | .owner = THIS_MODULE, | |
cdd137c9 | 316 | .pm = &max8998_pm, |
156f2528 KP |
317 | }, |
318 | .probe = max8998_i2c_probe, | |
319 | .remove = max8998_i2c_remove, | |
320 | .id_table = max8998_i2c_id, | |
321 | }; | |
322 | ||
323 | static int __init max8998_i2c_init(void) | |
324 | { | |
325 | return i2c_add_driver(&max8998_i2c_driver); | |
326 | } | |
327 | /* init early so consumer devices can complete system boot */ | |
328 | subsys_initcall(max8998_i2c_init); | |
329 | ||
330 | static void __exit max8998_i2c_exit(void) | |
331 | { | |
332 | i2c_del_driver(&max8998_i2c_driver); | |
333 | } | |
334 | module_exit(max8998_i2c_exit); | |
335 | ||
336 | MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver"); | |
337 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
338 | MODULE_LICENSE("GPL"); |