Merge branch 'printk-rework' into for-linus
[linux-2.6-microblaze.git] / drivers / mfd / max77693.c
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
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                                 &reg_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
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
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
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");