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1// SPDX-License-Identifier: GPL-2.0+
2//
3// max77693.c - mfd core driver for the MAX 77693
4//
5// Copyright (C) 2012 Samsung Electronics
6// SangYoung Son <[email protected]>
7//
8// This program is not provided / owned by Maxim Integrated Products.
9//
10// This driver is based on max8997.c
11
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/i2c.h>
15#include <linux/err.h>
16#include <linux/interrupt.h>
17#include <linux/of.h>
18#include <linux/pm_runtime.h>
19#include <linux/mutex.h>
20#include <linux/mfd/core.h>
21#include <linux/mfd/max77693.h>
22#include <linux/mfd/max77693-common.h>
23#include <linux/mfd/max77693-private.h>
24#include <linux/regulator/machine.h>
25#include <linux/regmap.h>
26
27#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
28#define I2C_ADDR_MUIC (0x4A >> 1)
29#define I2C_ADDR_HAPTIC (0x90 >> 1)
30
31static const struct mfd_cell max77693_devs[] = {
32 { .name = "max77693-pmic", },
33 {
34 .name = "max77693-charger",
35 .of_compatible = "maxim,max77693-charger",
36 },
37 {
38 .name = "max77693-muic",
39 .of_compatible = "maxim,max77693-muic",
40 },
41 {
42 .name = "max77693-haptic",
43 .of_compatible = "maxim,max77693-haptic",
44 },
45 {
46 .name = "max77693-led",
47 .of_compatible = "maxim,max77693-led",
48 },
49};
50
51static const struct regmap_config max77693_regmap_config = {
52 .reg_bits = 8,
53 .val_bits = 8,
54 .max_register = MAX77693_PMIC_REG_END,
55};
56
57static const struct regmap_irq max77693_led_irqs[] = {
58 { .mask = LED_IRQ_FLED2_OPEN, },
59 { .mask = LED_IRQ_FLED2_SHORT, },
60 { .mask = LED_IRQ_FLED1_OPEN, },
61 { .mask = LED_IRQ_FLED1_SHORT, },
62 { .mask = LED_IRQ_MAX_FLASH, },
63};
64
65static const struct regmap_irq_chip max77693_led_irq_chip = {
66 .name = "max77693-led",
67 .status_base = MAX77693_LED_REG_FLASH_INT,
68 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK,
69 .num_regs = 1,
70 .irqs = max77693_led_irqs,
71 .num_irqs = ARRAY_SIZE(max77693_led_irqs),
72};
73
74static const struct regmap_irq max77693_topsys_irqs[] = {
75 { .mask = TOPSYS_IRQ_T120C_INT, },
76 { .mask = TOPSYS_IRQ_T140C_INT, },
77 { .mask = TOPSYS_IRQ_LOWSYS_INT, },
78};
79
80static const struct regmap_irq_chip max77693_topsys_irq_chip = {
81 .name = "max77693-topsys",
82 .status_base = MAX77693_PMIC_REG_TOPSYS_INT,
83 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
84 .num_regs = 1,
85 .irqs = max77693_topsys_irqs,
86 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
87};
88
89static const struct regmap_irq max77693_charger_irqs[] = {
90 { .mask = CHG_IRQ_BYP_I, },
91 { .mask = CHG_IRQ_THM_I, },
92 { .mask = CHG_IRQ_BAT_I, },
93 { .mask = CHG_IRQ_CHG_I, },
94 { .mask = CHG_IRQ_CHGIN_I, },
95};
96
97static const struct regmap_irq_chip max77693_charger_irq_chip = {
98 .name = "max77693-charger",
99 .status_base = MAX77693_CHG_REG_CHG_INT,
100 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
101 .num_regs = 1,
102 .irqs = max77693_charger_irqs,
103 .num_irqs = ARRAY_SIZE(max77693_charger_irqs),
104};
105
106static const struct regmap_config max77693_regmap_muic_config = {
107 .reg_bits = 8,
108 .val_bits = 8,
109 .max_register = MAX77693_MUIC_REG_END,
110};
111
112static const struct regmap_irq max77693_muic_irqs[] = {
113 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
114 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
115 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
116 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
117
118 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
119 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
120 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
121 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
122 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
123 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
124
125 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
126 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
127 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
128 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
129 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
130 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
131};
132
133static const struct regmap_irq_chip max77693_muic_irq_chip = {
134 .name = "max77693-muic",
135 .status_base = MAX77693_MUIC_REG_INT1,
136 .unmask_base = MAX77693_MUIC_REG_INTMASK1,
137 .num_regs = 3,
138 .irqs = max77693_muic_irqs,
139 .num_irqs = ARRAY_SIZE(max77693_muic_irqs),
140};
141
142static const struct regmap_config max77693_regmap_haptic_config = {
143 .reg_bits = 8,
144 .val_bits = 8,
145 .max_register = MAX77693_HAPTIC_REG_END,
146};
147
148static int max77693_i2c_probe(struct i2c_client *i2c)
149{
150 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
151 struct max77693_dev *max77693;
152 unsigned int reg_data;
153 int ret = 0;
154
155 max77693 = devm_kzalloc(&i2c->dev,
156 sizeof(struct max77693_dev), GFP_KERNEL);
157 if (max77693 == NULL)
158 return -ENOMEM;
159
160 i2c_set_clientdata(i2c, max77693);
161 max77693->dev = &i2c->dev;
162 max77693->i2c = i2c;
163 max77693->irq = i2c->irq;
164 max77693->type = id->driver_data;
165
166 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
167 if (IS_ERR(max77693->regmap)) {
168 ret = PTR_ERR(max77693->regmap);
169 dev_err(max77693->dev, "failed to allocate register map: %d\n",
170 ret);
171 return ret;
172 }
173
174 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
175 &reg_data);
176 if (ret < 0) {
177 dev_err(max77693->dev, "device not found on this channel\n");
178 return ret;
179 } else
180 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
181
182 max77693->i2c_muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
183 if (IS_ERR(max77693->i2c_muic)) {
184 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
185 return PTR_ERR(max77693->i2c_muic);
186 }
187 i2c_set_clientdata(max77693->i2c_muic, max77693);
188
189 max77693->i2c_haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
190 if (IS_ERR(max77693->i2c_haptic)) {
191 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
192 ret = PTR_ERR(max77693->i2c_haptic);
193 goto err_i2c_haptic;
194 }
195 i2c_set_clientdata(max77693->i2c_haptic, max77693);
196
197 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
198 &max77693_regmap_haptic_config);
199 if (IS_ERR(max77693->regmap_haptic)) {
200 ret = PTR_ERR(max77693->regmap_haptic);
201 dev_err(max77693->dev,
202 "failed to initialize haptic register map: %d\n", ret);
203 goto err_regmap;
204 }
205
206 /*
207 * Initialize register map for MUIC device because use regmap-muic
208 * instance of MUIC device when irq of max77693 is initialized
209 * before call max77693-muic probe() function.
210 */
211 max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
212 &max77693_regmap_muic_config);
213 if (IS_ERR(max77693->regmap_muic)) {
214 ret = PTR_ERR(max77693->regmap_muic);
215 dev_err(max77693->dev,
216 "failed to allocate register map: %d\n", ret);
217 goto err_regmap;
218 }
219
220 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
221 IRQF_ONESHOT | IRQF_SHARED, 0,
222 &max77693_led_irq_chip,
223 &max77693->irq_data_led);
224 if (ret) {
225 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
226 goto err_regmap;
227 }
228
229 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
230 IRQF_ONESHOT | IRQF_SHARED, 0,
231 &max77693_topsys_irq_chip,
232 &max77693->irq_data_topsys);
233 if (ret) {
234 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
235 goto err_irq_topsys;
236 }
237
238 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
239 IRQF_ONESHOT | IRQF_SHARED, 0,
240 &max77693_charger_irq_chip,
241 &max77693->irq_data_chg);
242 if (ret) {
243 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
244 goto err_irq_charger;
245 }
246
247 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
248 IRQF_ONESHOT | IRQF_SHARED, 0,
249 &max77693_muic_irq_chip,
250 &max77693->irq_data_muic);
251 if (ret) {
252 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
253 goto err_irq_muic;
254 }
255
256 /* Unmask interrupts from all blocks in interrupt source register */
257 ret = regmap_update_bits(max77693->regmap,
258 MAX77693_PMIC_REG_INTSRC_MASK,
259 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
260 if (ret < 0) {
261 dev_err(max77693->dev,
262 "Could not unmask interrupts in INTSRC: %d\n",
263 ret);
264 goto err_intsrc;
265 }
266
267 pm_runtime_set_active(max77693->dev);
268
269 ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
270 ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
271 if (ret < 0)
272 goto err_mfd;
273
274 return ret;
275
276err_mfd:
277 mfd_remove_devices(max77693->dev);
278err_intsrc:
279 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
280err_irq_muic:
281 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
282err_irq_charger:
283 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
284err_irq_topsys:
285 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
286err_regmap:
287 i2c_unregister_device(max77693->i2c_haptic);
288err_i2c_haptic:
289 i2c_unregister_device(max77693->i2c_muic);
290 return ret;
291}
292
293static void max77693_i2c_remove(struct i2c_client *i2c)
294{
295 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
296
297 mfd_remove_devices(max77693->dev);
298
299 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
300 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
301 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
302 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
303
304 i2c_unregister_device(max77693->i2c_muic);
305 i2c_unregister_device(max77693->i2c_haptic);
306}
307
308static const struct i2c_device_id max77693_i2c_id[] = {
309 { "max77693", TYPE_MAX77693 },
310 { }
311};
312MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
313
314static int max77693_suspend(struct device *dev)
315{
316 struct i2c_client *i2c = to_i2c_client(dev);
317 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
318
319 if (device_may_wakeup(dev)) {
320 enable_irq_wake(max77693->irq);
321 disable_irq(max77693->irq);
322 }
323
324 return 0;
325}
326
327static int max77693_resume(struct device *dev)
328{
329 struct i2c_client *i2c = to_i2c_client(dev);
330 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
331
332 if (device_may_wakeup(dev)) {
333 disable_irq_wake(max77693->irq);
334 enable_irq(max77693->irq);
335 }
336
337 return 0;
338}
339
340static const struct dev_pm_ops max77693_pm = {
341 .suspend = max77693_suspend,
342 .resume = max77693_resume,
343};
344
345#ifdef CONFIG_OF
346static const struct of_device_id max77693_dt_match[] = {
347 { .compatible = "maxim,max77693" },
348 {},
349};
350MODULE_DEVICE_TABLE(of, max77693_dt_match);
351#endif
352
353static struct i2c_driver max77693_i2c_driver = {
354 .driver = {
355 .name = "max77693",
356 .pm = &max77693_pm,
357 .of_match_table = of_match_ptr(max77693_dt_match),
358 },
359 .probe = max77693_i2c_probe,
360 .remove = max77693_i2c_remove,
361 .id_table = max77693_i2c_id,
362};
363
364module_i2c_driver(max77693_i2c_driver);
365
366MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
367MODULE_AUTHOR("SangYoung, Son <[email protected]>");
368MODULE_LICENSE("GPL");