mfd: max77686: Use of_device_get_match_data() helper
[linux-block.git] / drivers / mfd / max77686.c
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dae8a969 1/*
a259f389 2 * max77686.c - mfd core driver for the Maxim 77686/802
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3 *
4 * Copyright (C) 2012 Samsung Electronics
630fd98c 5 * Chiwoong Byun <woong.byun@samsung.com>
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6 * Jonghwa Lee <jonghwa3.lee@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 * This driver is based on max8997.c
23 */
24
25#include <linux/export.h>
26#include <linux/slab.h>
27#include <linux/i2c.h>
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28#include <linux/irq.h>
29#include <linux/interrupt.h>
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30#include <linux/pm_runtime.h>
31#include <linux/module.h>
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32#include <linux/mfd/core.h>
33#include <linux/mfd/max77686.h>
34#include <linux/mfd/max77686-private.h>
35#include <linux/err.h>
2a048d3b 36#include <linux/of.h>
68e61f75 37#include <linux/of_device.h>
dae8a969 38
7c0517b1 39static const struct mfd_cell max77686_devs[] = {
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40 { .name = "max77686-pmic", },
41 { .name = "max77686-rtc", },
c0fa7e10 42 { .name = "max77686-clk", },
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43};
44
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45static const struct mfd_cell max77802_devs[] = {
46 { .name = "max77802-pmic", },
47 { .name = "max77802-clk", },
48 { .name = "max77802-rtc", },
49};
50
51static bool max77802_pmic_is_accessible_reg(struct device *dev,
52 unsigned int reg)
53{
b87d9a0f 54 return reg < MAX77802_REG_PMIC_END;
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55}
56
57static bool max77802_rtc_is_accessible_reg(struct device *dev,
58 unsigned int reg)
59{
60 return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
61}
62
63static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
64{
65 return (max77802_pmic_is_accessible_reg(dev, reg) ||
66 max77802_rtc_is_accessible_reg(dev, reg));
67}
68
69static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
70{
71 return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 ||
72 reg == MAX77802_REG_INT2);
73}
74
75static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
76{
77 return (reg == MAX77802_RTC_INT ||
78 reg == MAX77802_RTC_UPDATE0 ||
79 reg == MAX77802_RTC_UPDATE1);
80}
81
82static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
83{
84 return (max77802_pmic_is_precious_reg(dev, reg) ||
85 max77802_rtc_is_precious_reg(dev, reg));
86}
87
88static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
89{
90 return (max77802_is_precious_reg(dev, reg) ||
91 reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 ||
92 reg == MAX77802_REG_PWRON);
93}
94
95static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
96{
97 return (max77802_rtc_is_precious_reg(dev, reg) ||
98 reg == MAX77802_RTC_SEC ||
99 reg == MAX77802_RTC_MIN ||
100 reg == MAX77802_RTC_HOUR ||
101 reg == MAX77802_RTC_WEEKDAY ||
102 reg == MAX77802_RTC_MONTH ||
103 reg == MAX77802_RTC_YEAR ||
104 reg == MAX77802_RTC_DATE);
105}
106
107static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
108{
109 return (max77802_pmic_is_volatile_reg(dev, reg) ||
110 max77802_rtc_is_volatile_reg(dev, reg));
111}
112
68be231c 113static const struct regmap_config max77686_regmap_config = {
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114 .reg_bits = 8,
115 .val_bits = 8,
116};
117
68be231c 118static const struct regmap_config max77802_regmap_config = {
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119 .reg_bits = 8,
120 .val_bits = 8,
121 .writeable_reg = max77802_is_accessible_reg,
122 .readable_reg = max77802_is_accessible_reg,
123 .precious_reg = max77802_is_precious_reg,
124 .volatile_reg = max77802_is_volatile_reg,
125 .name = "max77802-pmic",
126 .cache_type = REGCACHE_RBTREE,
127};
128
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129static const struct regmap_irq max77686_irqs[] = {
130 /* INT1 interrupts */
131 { .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
132 { .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
133 { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
134 { .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
135 { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
136 { .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
137 { .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
138 { .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
139 /* INT2 interrupts */
140 { .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
141 { .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
142};
143
144static const struct regmap_irq_chip max77686_irq_chip = {
145 .name = "max77686-pmic",
146 .status_base = MAX77686_REG_INT1,
147 .mask_base = MAX77686_REG_INT1MSK,
148 .num_regs = 2,
149 .irqs = max77686_irqs,
150 .num_irqs = ARRAY_SIZE(max77686_irqs),
151};
152
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153static const struct regmap_irq_chip max77802_irq_chip = {
154 .name = "max77802-pmic",
155 .status_base = MAX77802_REG_INT1,
156 .mask_base = MAX77802_REG_INT1MSK,
157 .num_regs = 2,
158 .irqs = max77686_irqs, /* same masks as 77686 */
159 .num_irqs = ARRAY_SIZE(max77686_irqs),
160};
161
b68ece3d 162static const struct of_device_id max77686_pmic_dt_match[] = {
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163 {
164 .compatible = "maxim,max77686",
165 .data = (void *)TYPE_MAX77686,
166 },
167 {
168 .compatible = "maxim,max77802",
169 .data = (void *)TYPE_MAX77802,
170 },
171 { },
2984fc00 172};
7f8ada1a 173MODULE_DEVICE_TABLE(of, max77686_pmic_dt_match);
2984fc00 174
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175static int max77686_i2c_probe(struct i2c_client *i2c,
176 const struct i2c_device_id *id)
177{
c1516f84 178 struct max77686_dev *max77686 = NULL;
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179 unsigned int data;
180 int ret = 0;
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181 const struct regmap_config *config;
182 const struct regmap_irq_chip *irq_chip;
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183 const struct mfd_cell *cells;
184 int n_devs;
dae8a969 185
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186 max77686 = devm_kzalloc(&i2c->dev,
187 sizeof(struct max77686_dev), GFP_KERNEL);
c0e0fcda 188 if (!max77686)
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189 return -ENOMEM;
190
dae8a969 191 i2c_set_clientdata(i2c, max77686);
68e61f75 192 max77686->type = (unsigned long)of_device_get_match_data(&i2c->dev);
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193 max77686->dev = &i2c->dev;
194 max77686->i2c = i2c;
dae8a969 195
2b40459b 196 max77686->irq = i2c->irq;
dae8a969 197
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198 if (max77686->type == TYPE_MAX77686) {
199 config = &max77686_regmap_config;
200 irq_chip = &max77686_irq_chip;
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201 cells = max77686_devs;
202 n_devs = ARRAY_SIZE(max77686_devs);
203 } else {
204 config = &max77802_regmap_config;
205 irq_chip = &max77802_irq_chip;
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206 cells = max77802_devs;
207 n_devs = ARRAY_SIZE(max77802_devs);
208 }
209
210 max77686->regmap = devm_regmap_init_i2c(i2c, config);
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211 if (IS_ERR(max77686->regmap)) {
212 ret = PTR_ERR(max77686->regmap);
213 dev_err(max77686->dev, "Failed to allocate register map: %d\n",
214 ret);
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215 return ret;
216 }
217
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218 ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
219 if (ret < 0) {
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220 dev_err(max77686->dev,
221 "device not found on this channel (this is not an error)\n");
742413a4 222 return -ENODEV;
6f1c1e71 223 }
dae8a969 224
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225 ret = devm_regmap_add_irq_chip(&i2c->dev, max77686->regmap,
226 max77686->irq,
227 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
228 IRQF_SHARED, 0, irq_chip,
229 &max77686->irq_data);
f3937549 230 if (ret < 0) {
6f1c1e71 231 dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
f3937549 232 return ret;
6f1c1e71 233 }
dae8a969 234
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235 ret = devm_mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL,
236 0, NULL);
742413a4 237 if (ret < 0) {
6f1c1e71 238 dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
1a5422c9 239 return ret;
742413a4 240 }
dae8a969 241
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242 return 0;
243}
244
245static const struct i2c_device_id max77686_i2c_id[] = {
246 { "max77686", TYPE_MAX77686 },
95a6f715 247 { "max77802", TYPE_MAX77802 },
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248 { }
249};
250MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
251
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252#ifdef CONFIG_PM_SLEEP
253static int max77686_suspend(struct device *dev)
254{
1b5420e1 255 struct i2c_client *i2c = to_i2c_client(dev);
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256 struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
257
258 if (device_may_wakeup(dev))
259 enable_irq_wake(max77686->irq);
260
261 /*
262 * IRQ must be disabled during suspend because if it happens
263 * while suspended it will be handled before resuming I2C.
264 *
265 * When device is woken up from suspend (e.g. by RTC wake alarm),
266 * an interrupt occurs before resuming I2C bus controller.
267 * Interrupt handler tries to read registers but this read
268 * will fail because I2C is still suspended.
269 */
270 disable_irq(max77686->irq);
271
272 return 0;
273}
274
275static int max77686_resume(struct device *dev)
276{
1b5420e1 277 struct i2c_client *i2c = to_i2c_client(dev);
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278 struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
279
280 if (device_may_wakeup(dev))
281 disable_irq_wake(max77686->irq);
282
283 enable_irq(max77686->irq);
284
285 return 0;
286}
287#endif /* CONFIG_PM_SLEEP */
288
289static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
290
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291static struct i2c_driver max77686_i2c_driver = {
292 .driver = {
293 .name = "max77686",
2b52b5d5 294 .pm = &max77686_pm,
c1516f84 295 .of_match_table = of_match_ptr(max77686_pmic_dt_match),
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296 },
297 .probe = max77686_i2c_probe,
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298 .id_table = max77686_i2c_id,
299};
300
8a0aee4a 301module_i2c_driver(max77686_i2c_driver);
dae8a969 302
a259f389 303MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
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304MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
305MODULE_LICENSE("GPL");