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 <hello.son@samsung.com>
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
31 static 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
51 static const struct regmap_config max77693_regmap_config = {
52 .reg_bits = 8,
53 .val_bits = 8,
54 .max_register = MAX77693_PMIC_REG_END,
55 };
56
57 static 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
65 static 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 .mask_invert = false,
70 .num_regs = 1,
71 .irqs = max77693_led_irqs,
72 .num_irqs = ARRAY_SIZE(max77693_led_irqs),
73 };
74
75 static const struct regmap_irq max77693_topsys_irqs[] = {
76 { .mask = TOPSYS_IRQ_T120C_INT, },
77 { .mask = TOPSYS_IRQ_T140C_INT, },
78 { .mask = TOPSYS_IRQ_LOWSYS_INT, },
79 };
80
81 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
82 .name = "max77693-topsys",
83 .status_base = MAX77693_PMIC_REG_TOPSYS_INT,
84 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
85 .mask_invert = false,
86 .num_regs = 1,
87 .irqs = max77693_topsys_irqs,
88 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
89 };
90
91 static const struct regmap_irq max77693_charger_irqs[] = {
92 { .mask = CHG_IRQ_BYP_I, },
93 { .mask = CHG_IRQ_THM_I, },
94 { .mask = CHG_IRQ_BAT_I, },
95 { .mask = CHG_IRQ_CHG_I, },
96 { .mask = CHG_IRQ_CHGIN_I, },
97 };
98
99 static const struct regmap_irq_chip max77693_charger_irq_chip = {
100 .name = "max77693-charger",
101 .status_base = MAX77693_CHG_REG_CHG_INT,
102 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
103 .mask_invert = false,
104 .num_regs = 1,
105 .irqs = max77693_charger_irqs,
106 .num_irqs = ARRAY_SIZE(max77693_charger_irqs),
107 };
108
109 static const struct regmap_config max77693_regmap_muic_config = {
110 .reg_bits = 8,
111 .val_bits = 8,
112 .max_register = MAX77693_MUIC_REG_END,
113 };
114
115 static const struct regmap_irq max77693_muic_irqs[] = {
116 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
117 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
118 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
119 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
120
121 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
122 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
123 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
124 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
125 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
126 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
127
128 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
129 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
130 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
131 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
132 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
133 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
134 };
135
136 static const struct regmap_irq_chip max77693_muic_irq_chip = {
137 .name = "max77693-muic",
138 .status_base = MAX77693_MUIC_REG_INT1,
139 .mask_base = MAX77693_MUIC_REG_INTMASK1,
140 .mask_invert = true,
141 .num_regs = 3,
142 .irqs = max77693_muic_irqs,
143 .num_irqs = ARRAY_SIZE(max77693_muic_irqs),
144 };
145
146 static const struct regmap_config max77693_regmap_haptic_config = {
147 .reg_bits = 8,
148 .val_bits = 8,
149 .max_register = MAX77693_HAPTIC_REG_END,
150 };
151
max77693_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)152 static int max77693_i2c_probe(struct i2c_client *i2c,
153 const struct i2c_device_id *id)
154 {
155 struct max77693_dev *max77693;
156 unsigned int reg_data;
157 int ret = 0;
158
159 max77693 = devm_kzalloc(&i2c->dev,
160 sizeof(struct max77693_dev), GFP_KERNEL);
161 if (max77693 == NULL)
162 return -ENOMEM;
163
164 i2c_set_clientdata(i2c, max77693);
165 max77693->dev = &i2c->dev;
166 max77693->i2c = i2c;
167 max77693->irq = i2c->irq;
168 max77693->type = id->driver_data;
169
170 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
171 if (IS_ERR(max77693->regmap)) {
172 ret = PTR_ERR(max77693->regmap);
173 dev_err(max77693->dev, "failed to allocate register map: %d\n",
174 ret);
175 return ret;
176 }
177
178 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
179 ®_data);
180 if (ret < 0) {
181 dev_err(max77693->dev, "device not found on this channel\n");
182 return ret;
183 } else
184 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
185
186 max77693->i2c_muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
187 if (IS_ERR(max77693->i2c_muic)) {
188 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
189 return PTR_ERR(max77693->i2c_muic);
190 }
191 i2c_set_clientdata(max77693->i2c_muic, max77693);
192
193 max77693->i2c_haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
194 if (IS_ERR(max77693->i2c_haptic)) {
195 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
196 ret = PTR_ERR(max77693->i2c_haptic);
197 goto err_i2c_haptic;
198 }
199 i2c_set_clientdata(max77693->i2c_haptic, max77693);
200
201 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
202 &max77693_regmap_haptic_config);
203 if (IS_ERR(max77693->regmap_haptic)) {
204 ret = PTR_ERR(max77693->regmap_haptic);
205 dev_err(max77693->dev,
206 "failed to initialize haptic register map: %d\n", ret);
207 goto err_regmap;
208 }
209
210 /*
211 * Initialize register map for MUIC device because use regmap-muic
212 * instance of MUIC device when irq of max77693 is initialized
213 * before call max77693-muic probe() function.
214 */
215 max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
216 &max77693_regmap_muic_config);
217 if (IS_ERR(max77693->regmap_muic)) {
218 ret = PTR_ERR(max77693->regmap_muic);
219 dev_err(max77693->dev,
220 "failed to allocate register map: %d\n", ret);
221 goto err_regmap;
222 }
223
224 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
225 IRQF_ONESHOT | IRQF_SHARED |
226 IRQF_TRIGGER_FALLING, 0,
227 &max77693_led_irq_chip,
228 &max77693->irq_data_led);
229 if (ret) {
230 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
231 goto err_regmap;
232 }
233
234 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
235 IRQF_ONESHOT | IRQF_SHARED |
236 IRQF_TRIGGER_FALLING, 0,
237 &max77693_topsys_irq_chip,
238 &max77693->irq_data_topsys);
239 if (ret) {
240 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
241 goto err_irq_topsys;
242 }
243
244 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
245 IRQF_ONESHOT | IRQF_SHARED |
246 IRQF_TRIGGER_FALLING, 0,
247 &max77693_charger_irq_chip,
248 &max77693->irq_data_chg);
249 if (ret) {
250 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
251 goto err_irq_charger;
252 }
253
254 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
255 IRQF_ONESHOT | IRQF_SHARED |
256 IRQF_TRIGGER_FALLING, 0,
257 &max77693_muic_irq_chip,
258 &max77693->irq_data_muic);
259 if (ret) {
260 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
261 goto err_irq_muic;
262 }
263
264 /* Unmask interrupts from all blocks in interrupt source register */
265 ret = regmap_update_bits(max77693->regmap,
266 MAX77693_PMIC_REG_INTSRC_MASK,
267 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
268 if (ret < 0) {
269 dev_err(max77693->dev,
270 "Could not unmask interrupts in INTSRC: %d\n",
271 ret);
272 goto err_intsrc;
273 }
274
275 pm_runtime_set_active(max77693->dev);
276
277 ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
278 ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
279 if (ret < 0)
280 goto err_mfd;
281
282 return ret;
283
284 err_mfd:
285 mfd_remove_devices(max77693->dev);
286 err_intsrc:
287 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
288 err_irq_muic:
289 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
290 err_irq_charger:
291 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
292 err_irq_topsys:
293 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
294 err_regmap:
295 i2c_unregister_device(max77693->i2c_haptic);
296 err_i2c_haptic:
297 i2c_unregister_device(max77693->i2c_muic);
298 return ret;
299 }
300
max77693_i2c_remove(struct i2c_client * i2c)301 static int max77693_i2c_remove(struct i2c_client *i2c)
302 {
303 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
304
305 mfd_remove_devices(max77693->dev);
306
307 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
308 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
309 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
310 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
311
312 i2c_unregister_device(max77693->i2c_muic);
313 i2c_unregister_device(max77693->i2c_haptic);
314
315 return 0;
316 }
317
318 static const struct i2c_device_id max77693_i2c_id[] = {
319 { "max77693", TYPE_MAX77693 },
320 { }
321 };
322 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
323
max77693_suspend(struct device * dev)324 static int max77693_suspend(struct device *dev)
325 {
326 struct i2c_client *i2c = to_i2c_client(dev);
327 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
328
329 if (device_may_wakeup(dev)) {
330 enable_irq_wake(max77693->irq);
331 disable_irq(max77693->irq);
332 }
333
334 return 0;
335 }
336
max77693_resume(struct device * dev)337 static int max77693_resume(struct device *dev)
338 {
339 struct i2c_client *i2c = to_i2c_client(dev);
340 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
341
342 if (device_may_wakeup(dev)) {
343 disable_irq_wake(max77693->irq);
344 enable_irq(max77693->irq);
345 }
346
347 return 0;
348 }
349
350 static const struct dev_pm_ops max77693_pm = {
351 .suspend = max77693_suspend,
352 .resume = max77693_resume,
353 };
354
355 #ifdef CONFIG_OF
356 static const struct of_device_id max77693_dt_match[] = {
357 { .compatible = "maxim,max77693" },
358 {},
359 };
360 MODULE_DEVICE_TABLE(of, max77693_dt_match);
361 #endif
362
363 static struct i2c_driver max77693_i2c_driver = {
364 .driver = {
365 .name = "max77693",
366 .pm = &max77693_pm,
367 .of_match_table = of_match_ptr(max77693_dt_match),
368 },
369 .probe = max77693_i2c_probe,
370 .remove = max77693_i2c_remove,
371 .id_table = max77693_i2c_id,
372 };
373
374 module_i2c_driver(max77693_i2c_driver);
375
376 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
377 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
378 MODULE_LICENSE("GPL");
379
