Loading...
1// SPDX-License-Identifier: GPL-2.0+
2//
3// max8998.c - mfd core driver for the Maxim 8998
4//
5// Copyright (C) 2009-2010 Samsung Electronics
6// Kyungmin Park <kyungmin.park@samsung.com>
7// Marek Szyprowski <m.szyprowski@samsung.com>
8
9#include <linux/err.h>
10#include <linux/init.h>
11#include <linux/slab.h>
12#include <linux/i2c.h>
13#include <linux/interrupt.h>
14#include <linux/of.h>
15#include <linux/of_device.h>
16#include <linux/of_irq.h>
17#include <linux/pm_runtime.h>
18#include <linux/mutex.h>
19#include <linux/mfd/core.h>
20#include <linux/mfd/max8998.h>
21#include <linux/mfd/max8998-private.h>
22
23#define RTC_I2C_ADDR (0x0c >> 1)
24
25static const struct mfd_cell max8998_devs[] = {
26 {
27 .name = "max8998-pmic",
28 }, {
29 .name = "max8998-rtc",
30 }, {
31 .name = "max8998-battery",
32 },
33};
34
35static const struct mfd_cell lp3974_devs[] = {
36 {
37 .name = "lp3974-pmic",
38 }, {
39 .name = "lp3974-rtc",
40 },
41};
42
43int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
44{
45 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
46 int ret;
47
48 mutex_lock(&max8998->iolock);
49 ret = i2c_smbus_read_byte_data(i2c, reg);
50 mutex_unlock(&max8998->iolock);
51 if (ret < 0)
52 return ret;
53
54 ret &= 0xff;
55 *dest = ret;
56 return 0;
57}
58EXPORT_SYMBOL(max8998_read_reg);
59
60int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
61{
62 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
63 int ret;
64
65 mutex_lock(&max8998->iolock);
66 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
67 mutex_unlock(&max8998->iolock);
68 if (ret < 0)
69 return ret;
70
71 return 0;
72}
73EXPORT_SYMBOL(max8998_bulk_read);
74
75int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
76{
77 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
78 int ret;
79
80 mutex_lock(&max8998->iolock);
81 ret = i2c_smbus_write_byte_data(i2c, reg, value);
82 mutex_unlock(&max8998->iolock);
83 return ret;
84}
85EXPORT_SYMBOL(max8998_write_reg);
86
87int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
88{
89 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
90 int ret;
91
92 mutex_lock(&max8998->iolock);
93 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
94 mutex_unlock(&max8998->iolock);
95 if (ret < 0)
96 return ret;
97
98 return 0;
99}
100EXPORT_SYMBOL(max8998_bulk_write);
101
102int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
103{
104 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
105 int ret;
106
107 mutex_lock(&max8998->iolock);
108 ret = i2c_smbus_read_byte_data(i2c, reg);
109 if (ret >= 0) {
110 u8 old_val = ret & 0xff;
111 u8 new_val = (val & mask) | (old_val & (~mask));
112 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
113 }
114 mutex_unlock(&max8998->iolock);
115 return ret;
116}
117EXPORT_SYMBOL(max8998_update_reg);
118
119#ifdef CONFIG_OF
120static const struct of_device_id max8998_dt_match[] = {
121 { .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
122 { .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
123 { .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
124 {},
125};
126#endif
127
128/*
129 * Only the common platform data elements for max8998 are parsed here from the
130 * device tree. Other sub-modules of max8998 such as pmic, rtc and others have
131 * to parse their own platform data elements from device tree.
132 *
133 * The max8998 platform data structure is instantiated here and the drivers for
134 * the sub-modules need not instantiate another instance while parsing their
135 * platform data.
136 */
137static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
138 struct device *dev)
139{
140 struct max8998_platform_data *pd;
141
142 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
143 if (!pd)
144 return ERR_PTR(-ENOMEM);
145
146 pd->ono = irq_of_parse_and_map(dev->of_node, 1);
147
148 /*
149 * ToDo: the 'wakeup' member in the platform data is more of a linux
150 * specfic information. Hence, there is no binding for that yet and
151 * not parsed here.
152 */
153 return pd;
154}
155
156static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
157 const struct i2c_device_id *id)
158{
159 if (i2c->dev.of_node)
160 return (unsigned long)of_device_get_match_data(&i2c->dev);
161
162 return id->driver_data;
163}
164
165static int max8998_i2c_probe(struct i2c_client *i2c)
166{
167 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
168 struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
169 struct max8998_dev *max8998;
170 int ret = 0;
171
172 max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
173 GFP_KERNEL);
174 if (max8998 == NULL)
175 return -ENOMEM;
176
177 if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
178 pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
179 if (IS_ERR(pdata))
180 return PTR_ERR(pdata);
181 }
182
183 i2c_set_clientdata(i2c, max8998);
184 max8998->dev = &i2c->dev;
185 max8998->i2c = i2c;
186 max8998->irq = i2c->irq;
187 max8998->type = max8998_i2c_get_driver_data(i2c, id);
188 max8998->pdata = pdata;
189 if (pdata) {
190 max8998->ono = pdata->ono;
191 max8998->irq_base = pdata->irq_base;
192 max8998->wakeup = pdata->wakeup;
193 }
194 mutex_init(&max8998->iolock);
195
196 max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);
197 if (IS_ERR(max8998->rtc)) {
198 dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
199 return PTR_ERR(max8998->rtc);
200 }
201 i2c_set_clientdata(max8998->rtc, max8998);
202
203 max8998_irq_init(max8998);
204
205 pm_runtime_set_active(max8998->dev);
206
207 switch (max8998->type) {
208 case TYPE_LP3974:
209 ret = mfd_add_devices(max8998->dev, -1,
210 lp3974_devs, ARRAY_SIZE(lp3974_devs),
211 NULL, 0, NULL);
212 break;
213 case TYPE_MAX8998:
214 ret = mfd_add_devices(max8998->dev, -1,
215 max8998_devs, ARRAY_SIZE(max8998_devs),
216 NULL, 0, NULL);
217 break;
218 default:
219 ret = -EINVAL;
220 }
221
222 if (ret < 0)
223 goto err;
224
225 device_init_wakeup(max8998->dev, max8998->wakeup);
226
227 return ret;
228
229err:
230 mfd_remove_devices(max8998->dev);
231 max8998_irq_exit(max8998);
232 i2c_unregister_device(max8998->rtc);
233 return ret;
234}
235
236static const struct i2c_device_id max8998_i2c_id[] = {
237 { "max8998", TYPE_MAX8998 },
238 { "lp3974", TYPE_LP3974},
239 { }
240};
241
242static int max8998_suspend(struct device *dev)
243{
244 struct i2c_client *i2c = to_i2c_client(dev);
245 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
246
247 if (device_may_wakeup(dev))
248 irq_set_irq_wake(max8998->irq, 1);
249 return 0;
250}
251
252static int max8998_resume(struct device *dev)
253{
254 struct i2c_client *i2c = to_i2c_client(dev);
255 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
256
257 if (device_may_wakeup(dev))
258 irq_set_irq_wake(max8998->irq, 0);
259 /*
260 * In LP3974, if IRQ registers are not "read & clear"
261 * when it's set during sleep, the interrupt becomes
262 * disabled.
263 */
264 return max8998_irq_resume(i2c_get_clientdata(i2c));
265}
266
267struct max8998_reg_dump {
268 u8 addr;
269 u8 val;
270};
271#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
272static struct max8998_reg_dump max8998_dump[] = {
273 SAVE_ITEM(MAX8998_REG_IRQM1),
274 SAVE_ITEM(MAX8998_REG_IRQM2),
275 SAVE_ITEM(MAX8998_REG_IRQM3),
276 SAVE_ITEM(MAX8998_REG_IRQM4),
277 SAVE_ITEM(MAX8998_REG_STATUSM1),
278 SAVE_ITEM(MAX8998_REG_STATUSM2),
279 SAVE_ITEM(MAX8998_REG_CHGR1),
280 SAVE_ITEM(MAX8998_REG_CHGR2),
281 SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
282 SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
283 SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
284 SAVE_ITEM(MAX8998_REG_ONOFF1),
285 SAVE_ITEM(MAX8998_REG_ONOFF2),
286 SAVE_ITEM(MAX8998_REG_ONOFF3),
287 SAVE_ITEM(MAX8998_REG_ONOFF4),
288 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
289 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
290 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
291 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
292 SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
293 SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
294 SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
295 SAVE_ITEM(MAX8998_REG_LDO4),
296 SAVE_ITEM(MAX8998_REG_LDO5),
297 SAVE_ITEM(MAX8998_REG_LDO6),
298 SAVE_ITEM(MAX8998_REG_LDO7),
299 SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
300 SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
301 SAVE_ITEM(MAX8998_REG_LDO12),
302 SAVE_ITEM(MAX8998_REG_LDO13),
303 SAVE_ITEM(MAX8998_REG_LDO14),
304 SAVE_ITEM(MAX8998_REG_LDO15),
305 SAVE_ITEM(MAX8998_REG_LDO16),
306 SAVE_ITEM(MAX8998_REG_LDO17),
307 SAVE_ITEM(MAX8998_REG_BKCHR),
308 SAVE_ITEM(MAX8998_REG_LBCNFG1),
309 SAVE_ITEM(MAX8998_REG_LBCNFG2),
310};
311/* Save registers before hibernation */
312static int max8998_freeze(struct device *dev)
313{
314 struct i2c_client *i2c = to_i2c_client(dev);
315 int i;
316
317 for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
318 max8998_read_reg(i2c, max8998_dump[i].addr,
319 &max8998_dump[i].val);
320
321 return 0;
322}
323
324/* Restore registers after hibernation */
325static int max8998_restore(struct device *dev)
326{
327 struct i2c_client *i2c = to_i2c_client(dev);
328 int i;
329
330 for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
331 max8998_write_reg(i2c, max8998_dump[i].addr,
332 max8998_dump[i].val);
333
334 return 0;
335}
336
337static const struct dev_pm_ops max8998_pm = {
338 .suspend = max8998_suspend,
339 .resume = max8998_resume,
340 .freeze = max8998_freeze,
341 .restore = max8998_restore,
342};
343
344static struct i2c_driver max8998_i2c_driver = {
345 .driver = {
346 .name = "max8998",
347 .pm = &max8998_pm,
348 .suppress_bind_attrs = true,
349 .of_match_table = of_match_ptr(max8998_dt_match),
350 },
351 .probe_new = max8998_i2c_probe,
352 .id_table = max8998_i2c_id,
353};
354
355static int __init max8998_i2c_init(void)
356{
357 return i2c_add_driver(&max8998_i2c_driver);
358}
359/* init early so consumer devices can complete system boot */
360subsys_initcall(max8998_i2c_init);
1/*
2 * max8998.c - mfd core driver for the Maxim 8998
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/err.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/i2c.h>
27#include <linux/interrupt.h>
28#include <linux/of.h>
29#include <linux/of_irq.h>
30#include <linux/pm_runtime.h>
31#include <linux/mutex.h>
32#include <linux/mfd/core.h>
33#include <linux/mfd/max8998.h>
34#include <linux/mfd/max8998-private.h>
35
36#define RTC_I2C_ADDR (0x0c >> 1)
37
38static const struct mfd_cell max8998_devs[] = {
39 {
40 .name = "max8998-pmic",
41 }, {
42 .name = "max8998-rtc",
43 }, {
44 .name = "max8998-battery",
45 },
46};
47
48static const struct mfd_cell lp3974_devs[] = {
49 {
50 .name = "lp3974-pmic",
51 }, {
52 .name = "lp3974-rtc",
53 },
54};
55
56int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
57{
58 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
59 int ret;
60
61 mutex_lock(&max8998->iolock);
62 ret = i2c_smbus_read_byte_data(i2c, reg);
63 mutex_unlock(&max8998->iolock);
64 if (ret < 0)
65 return ret;
66
67 ret &= 0xff;
68 *dest = ret;
69 return 0;
70}
71EXPORT_SYMBOL(max8998_read_reg);
72
73int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
74{
75 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
76 int ret;
77
78 mutex_lock(&max8998->iolock);
79 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
80 mutex_unlock(&max8998->iolock);
81 if (ret < 0)
82 return ret;
83
84 return 0;
85}
86EXPORT_SYMBOL(max8998_bulk_read);
87
88int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
89{
90 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
91 int ret;
92
93 mutex_lock(&max8998->iolock);
94 ret = i2c_smbus_write_byte_data(i2c, reg, value);
95 mutex_unlock(&max8998->iolock);
96 return ret;
97}
98EXPORT_SYMBOL(max8998_write_reg);
99
100int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
101{
102 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
103 int ret;
104
105 mutex_lock(&max8998->iolock);
106 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
107 mutex_unlock(&max8998->iolock);
108 if (ret < 0)
109 return ret;
110
111 return 0;
112}
113EXPORT_SYMBOL(max8998_bulk_write);
114
115int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
116{
117 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
118 int ret;
119
120 mutex_lock(&max8998->iolock);
121 ret = i2c_smbus_read_byte_data(i2c, reg);
122 if (ret >= 0) {
123 u8 old_val = ret & 0xff;
124 u8 new_val = (val & mask) | (old_val & (~mask));
125 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
126 }
127 mutex_unlock(&max8998->iolock);
128 return ret;
129}
130EXPORT_SYMBOL(max8998_update_reg);
131
132#ifdef CONFIG_OF
133static const struct of_device_id max8998_dt_match[] = {
134 { .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
135 { .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
136 { .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
137 {},
138};
139#endif
140
141/*
142 * Only the common platform data elements for max8998 are parsed here from the
143 * device tree. Other sub-modules of max8998 such as pmic, rtc and others have
144 * to parse their own platform data elements from device tree.
145 *
146 * The max8998 platform data structure is instantiated here and the drivers for
147 * the sub-modules need not instantiate another instance while parsing their
148 * platform data.
149 */
150static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
151 struct device *dev)
152{
153 struct max8998_platform_data *pd;
154
155 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
156 if (!pd)
157 return ERR_PTR(-ENOMEM);
158
159 pd->ono = irq_of_parse_and_map(dev->of_node, 1);
160
161 /*
162 * ToDo: the 'wakeup' member in the platform data is more of a linux
163 * specfic information. Hence, there is no binding for that yet and
164 * not parsed here.
165 */
166 return pd;
167}
168
169static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
170 const struct i2c_device_id *id)
171{
172 if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
173 const struct of_device_id *match;
174 match = of_match_node(max8998_dt_match, i2c->dev.of_node);
175 return (unsigned long)match->data;
176 }
177
178 return id->driver_data;
179}
180
181static int max8998_i2c_probe(struct i2c_client *i2c,
182 const struct i2c_device_id *id)
183{
184 struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
185 struct max8998_dev *max8998;
186 int ret = 0;
187
188 max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
189 GFP_KERNEL);
190 if (max8998 == NULL)
191 return -ENOMEM;
192
193 if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
194 pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
195 if (IS_ERR(pdata)) {
196 ret = PTR_ERR(pdata);
197 goto err;
198 }
199 }
200
201 i2c_set_clientdata(i2c, max8998);
202 max8998->dev = &i2c->dev;
203 max8998->i2c = i2c;
204 max8998->irq = i2c->irq;
205 max8998->type = max8998_i2c_get_driver_data(i2c, id);
206 max8998->pdata = pdata;
207 if (pdata) {
208 max8998->ono = pdata->ono;
209 max8998->irq_base = pdata->irq_base;
210 max8998->wakeup = pdata->wakeup;
211 }
212 mutex_init(&max8998->iolock);
213
214 max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
215 if (!max8998->rtc) {
216 dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
217 return -ENODEV;
218 }
219 i2c_set_clientdata(max8998->rtc, max8998);
220
221 max8998_irq_init(max8998);
222
223 pm_runtime_set_active(max8998->dev);
224
225 switch (max8998->type) {
226 case TYPE_LP3974:
227 ret = mfd_add_devices(max8998->dev, -1,
228 lp3974_devs, ARRAY_SIZE(lp3974_devs),
229 NULL, 0, NULL);
230 break;
231 case TYPE_MAX8998:
232 ret = mfd_add_devices(max8998->dev, -1,
233 max8998_devs, ARRAY_SIZE(max8998_devs),
234 NULL, 0, NULL);
235 break;
236 default:
237 ret = -EINVAL;
238 }
239
240 if (ret < 0)
241 goto err;
242
243 device_init_wakeup(max8998->dev, max8998->wakeup);
244
245 return ret;
246
247err:
248 mfd_remove_devices(max8998->dev);
249 max8998_irq_exit(max8998);
250 i2c_unregister_device(max8998->rtc);
251 return ret;
252}
253
254static const struct i2c_device_id max8998_i2c_id[] = {
255 { "max8998", TYPE_MAX8998 },
256 { "lp3974", TYPE_LP3974},
257 { }
258};
259
260static int max8998_suspend(struct device *dev)
261{
262 struct i2c_client *i2c = to_i2c_client(dev);
263 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
264
265 if (device_may_wakeup(dev))
266 irq_set_irq_wake(max8998->irq, 1);
267 return 0;
268}
269
270static int max8998_resume(struct device *dev)
271{
272 struct i2c_client *i2c = to_i2c_client(dev);
273 struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
274
275 if (device_may_wakeup(dev))
276 irq_set_irq_wake(max8998->irq, 0);
277 /*
278 * In LP3974, if IRQ registers are not "read & clear"
279 * when it's set during sleep, the interrupt becomes
280 * disabled.
281 */
282 return max8998_irq_resume(i2c_get_clientdata(i2c));
283}
284
285struct max8998_reg_dump {
286 u8 addr;
287 u8 val;
288};
289#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
290static struct max8998_reg_dump max8998_dump[] = {
291 SAVE_ITEM(MAX8998_REG_IRQM1),
292 SAVE_ITEM(MAX8998_REG_IRQM2),
293 SAVE_ITEM(MAX8998_REG_IRQM3),
294 SAVE_ITEM(MAX8998_REG_IRQM4),
295 SAVE_ITEM(MAX8998_REG_STATUSM1),
296 SAVE_ITEM(MAX8998_REG_STATUSM2),
297 SAVE_ITEM(MAX8998_REG_CHGR1),
298 SAVE_ITEM(MAX8998_REG_CHGR2),
299 SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
300 SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
301 SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
302 SAVE_ITEM(MAX8998_REG_ONOFF1),
303 SAVE_ITEM(MAX8998_REG_ONOFF2),
304 SAVE_ITEM(MAX8998_REG_ONOFF3),
305 SAVE_ITEM(MAX8998_REG_ONOFF4),
306 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
307 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
308 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
309 SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
310 SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
311 SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
312 SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
313 SAVE_ITEM(MAX8998_REG_LDO4),
314 SAVE_ITEM(MAX8998_REG_LDO5),
315 SAVE_ITEM(MAX8998_REG_LDO6),
316 SAVE_ITEM(MAX8998_REG_LDO7),
317 SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
318 SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
319 SAVE_ITEM(MAX8998_REG_LDO12),
320 SAVE_ITEM(MAX8998_REG_LDO13),
321 SAVE_ITEM(MAX8998_REG_LDO14),
322 SAVE_ITEM(MAX8998_REG_LDO15),
323 SAVE_ITEM(MAX8998_REG_LDO16),
324 SAVE_ITEM(MAX8998_REG_LDO17),
325 SAVE_ITEM(MAX8998_REG_BKCHR),
326 SAVE_ITEM(MAX8998_REG_LBCNFG1),
327 SAVE_ITEM(MAX8998_REG_LBCNFG2),
328};
329/* Save registers before hibernation */
330static int max8998_freeze(struct device *dev)
331{
332 struct i2c_client *i2c = to_i2c_client(dev);
333 int i;
334
335 for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
336 max8998_read_reg(i2c, max8998_dump[i].addr,
337 &max8998_dump[i].val);
338
339 return 0;
340}
341
342/* Restore registers after hibernation */
343static int max8998_restore(struct device *dev)
344{
345 struct i2c_client *i2c = to_i2c_client(dev);
346 int i;
347
348 for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
349 max8998_write_reg(i2c, max8998_dump[i].addr,
350 max8998_dump[i].val);
351
352 return 0;
353}
354
355static const struct dev_pm_ops max8998_pm = {
356 .suspend = max8998_suspend,
357 .resume = max8998_resume,
358 .freeze = max8998_freeze,
359 .restore = max8998_restore,
360};
361
362static struct i2c_driver max8998_i2c_driver = {
363 .driver = {
364 .name = "max8998",
365 .pm = &max8998_pm,
366 .suppress_bind_attrs = true,
367 .of_match_table = of_match_ptr(max8998_dt_match),
368 },
369 .probe = max8998_i2c_probe,
370 .id_table = max8998_i2c_id,
371};
372
373static int __init max8998_i2c_init(void)
374{
375 return i2c_add_driver(&max8998_i2c_driver);
376}
377/* init early so consumer devices can complete system boot */
378subsys_initcall(max8998_i2c_init);