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Linux/drivers/mfd/max77693.c

  1 /*
  2  * max77693.c - mfd core driver for the MAX 77693
  3  *
  4  * Copyright (C) 2012 Samsung Electronics
  5  * SangYoung Son <hello.son@smasung.com>
  6  *
  7  * This program is not provided / owned by Maxim Integrated Products.
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation; either version 2 of the License, or
 12  * (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 22  *
 23  * This driver is based on max8997.c
 24  */
 25 
 26 #include <linux/module.h>
 27 #include <linux/slab.h>
 28 #include <linux/i2c.h>
 29 #include <linux/err.h>
 30 #include <linux/interrupt.h>
 31 #include <linux/of.h>
 32 #include <linux/pm_runtime.h>
 33 #include <linux/mutex.h>
 34 #include <linux/mfd/core.h>
 35 #include <linux/mfd/max77693.h>
 36 #include <linux/mfd/max77693-common.h>
 37 #include <linux/mfd/max77693-private.h>
 38 #include <linux/regulator/machine.h>
 39 #include <linux/regmap.h>
 40 
 41 #define I2C_ADDR_PMIC   (0xCC >> 1)     /* Charger, Flash LED */
 42 #define I2C_ADDR_MUIC   (0x4A >> 1)
 43 #define I2C_ADDR_HAPTIC (0x90 >> 1)
 44 
 45 static const struct mfd_cell max77693_devs[] = {
 46         { .name = "max77693-pmic", },
 47         {
 48                 .name = "max77693-charger",
 49                 .of_compatible = "maxim,max77693-charger",
 50         },
 51         { .name = "max77693-muic", },
 52         {
 53                 .name = "max77693-haptic",
 54                 .of_compatible = "maxim,max77693-haptic",
 55         },
 56         {
 57                 .name = "max77693-led",
 58                 .of_compatible = "maxim,max77693-led",
 59         },
 60 };
 61 
 62 static const struct regmap_config max77693_regmap_config = {
 63         .reg_bits = 8,
 64         .val_bits = 8,
 65         .max_register = MAX77693_PMIC_REG_END,
 66 };
 67 
 68 static const struct regmap_irq max77693_led_irqs[] = {
 69         { .mask = LED_IRQ_FLED2_OPEN,  },
 70         { .mask = LED_IRQ_FLED2_SHORT, },
 71         { .mask = LED_IRQ_FLED1_OPEN,  },
 72         { .mask = LED_IRQ_FLED1_SHORT, },
 73         { .mask = LED_IRQ_MAX_FLASH,   },
 74 };
 75 
 76 static const struct regmap_irq_chip max77693_led_irq_chip = {
 77         .name                   = "max77693-led",
 78         .status_base            = MAX77693_LED_REG_FLASH_INT,
 79         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
 80         .mask_invert            = false,
 81         .num_regs               = 1,
 82         .irqs                   = max77693_led_irqs,
 83         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
 84 };
 85 
 86 static const struct regmap_irq max77693_topsys_irqs[] = {
 87         { .mask = TOPSYS_IRQ_T120C_INT,  },
 88         { .mask = TOPSYS_IRQ_T140C_INT,  },
 89         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
 90 };
 91 
 92 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
 93         .name                   = "max77693-topsys",
 94         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
 95         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
 96         .mask_invert            = false,
 97         .num_regs               = 1,
 98         .irqs                   = max77693_topsys_irqs,
 99         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
100 };
101 
102 static const struct regmap_irq max77693_charger_irqs[] = {
103         { .mask = CHG_IRQ_BYP_I,   },
104         { .mask = CHG_IRQ_THM_I,   },
105         { .mask = CHG_IRQ_BAT_I,   },
106         { .mask = CHG_IRQ_CHG_I,   },
107         { .mask = CHG_IRQ_CHGIN_I, },
108 };
109 
110 static const struct regmap_irq_chip max77693_charger_irq_chip = {
111         .name                   = "max77693-charger",
112         .status_base            = MAX77693_CHG_REG_CHG_INT,
113         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
114         .mask_invert            = false,
115         .num_regs               = 1,
116         .irqs                   = max77693_charger_irqs,
117         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
118 };
119 
120 static const struct regmap_config max77693_regmap_muic_config = {
121         .reg_bits = 8,
122         .val_bits = 8,
123         .max_register = MAX77693_MUIC_REG_END,
124 };
125 
126 static const struct regmap_irq max77693_muic_irqs[] = {
127         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
128         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
129         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
130         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
131 
132         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
133         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
134         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
135         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
136         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
137         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
138 
139         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
140         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
141         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
142         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
143         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
144         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
145 };
146 
147 static const struct regmap_irq_chip max77693_muic_irq_chip = {
148         .name                   = "max77693-muic",
149         .status_base            = MAX77693_MUIC_REG_INT1,
150         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
151         .mask_invert            = true,
152         .num_regs               = 3,
153         .irqs                   = max77693_muic_irqs,
154         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
155 };
156 
157 static const struct regmap_config max77693_regmap_haptic_config = {
158         .reg_bits = 8,
159         .val_bits = 8,
160         .max_register = MAX77693_HAPTIC_REG_END,
161 };
162 
163 static int max77693_i2c_probe(struct i2c_client *i2c,
164                               const struct i2c_device_id *id)
165 {
166         struct max77693_dev *max77693;
167         unsigned int reg_data;
168         int ret = 0;
169 
170         max77693 = devm_kzalloc(&i2c->dev,
171                         sizeof(struct max77693_dev), GFP_KERNEL);
172         if (max77693 == NULL)
173                 return -ENOMEM;
174 
175         i2c_set_clientdata(i2c, max77693);
176         max77693->dev = &i2c->dev;
177         max77693->i2c = i2c;
178         max77693->irq = i2c->irq;
179         max77693->type = id->driver_data;
180 
181         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
182         if (IS_ERR(max77693->regmap)) {
183                 ret = PTR_ERR(max77693->regmap);
184                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
185                                 ret);
186                 return ret;
187         }
188 
189         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
190                                 &reg_data);
191         if (ret < 0) {
192                 dev_err(max77693->dev, "device not found on this channel\n");
193                 return ret;
194         } else
195                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
196 
197         max77693->i2c_muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
198         if (!max77693->i2c_muic) {
199                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
200                 return -ENODEV;
201         }
202         i2c_set_clientdata(max77693->i2c_muic, max77693);
203 
204         max77693->i2c_haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
205         if (!max77693->i2c_haptic) {
206                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
207                 ret = -ENODEV;
208                 goto err_i2c_haptic;
209         }
210         i2c_set_clientdata(max77693->i2c_haptic, max77693);
211 
212         max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
213                                         &max77693_regmap_haptic_config);
214         if (IS_ERR(max77693->regmap_haptic)) {
215                 ret = PTR_ERR(max77693->regmap_haptic);
216                 dev_err(max77693->dev,
217                         "failed to initialize haptic register map: %d\n", ret);
218                 goto err_regmap;
219         }
220 
221         /*
222          * Initialize register map for MUIC device because use regmap-muic
223          * instance of MUIC device when irq of max77693 is initialized
224          * before call max77693-muic probe() function.
225          */
226         max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
227                                          &max77693_regmap_muic_config);
228         if (IS_ERR(max77693->regmap_muic)) {
229                 ret = PTR_ERR(max77693->regmap_muic);
230                 dev_err(max77693->dev,
231                         "failed to allocate register map: %d\n", ret);
232                 goto err_regmap;
233         }
234 
235         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
236                                 IRQF_ONESHOT | IRQF_SHARED |
237                                 IRQF_TRIGGER_FALLING, 0,
238                                 &max77693_led_irq_chip,
239                                 &max77693->irq_data_led);
240         if (ret) {
241                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
242                 goto err_regmap;
243         }
244 
245         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
246                                 IRQF_ONESHOT | IRQF_SHARED |
247                                 IRQF_TRIGGER_FALLING, 0,
248                                 &max77693_topsys_irq_chip,
249                                 &max77693->irq_data_topsys);
250         if (ret) {
251                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
252                 goto err_irq_topsys;
253         }
254 
255         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
256                                 IRQF_ONESHOT | IRQF_SHARED |
257                                 IRQF_TRIGGER_FALLING, 0,
258                                 &max77693_charger_irq_chip,
259                                 &max77693->irq_data_chg);
260         if (ret) {
261                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
262                 goto err_irq_charger;
263         }
264 
265         ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
266                                 IRQF_ONESHOT | IRQF_SHARED |
267                                 IRQF_TRIGGER_FALLING, 0,
268                                 &max77693_muic_irq_chip,
269                                 &max77693->irq_data_muic);
270         if (ret) {
271                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
272                 goto err_irq_muic;
273         }
274 
275         /* Unmask interrupts from all blocks in interrupt source register */
276         ret = regmap_update_bits(max77693->regmap,
277                                 MAX77693_PMIC_REG_INTSRC_MASK,
278                                 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
279         if (ret < 0) {
280                 dev_err(max77693->dev,
281                         "Could not unmask interrupts in INTSRC: %d\n",
282                         ret);
283                 goto err_intsrc;
284         }
285 
286         pm_runtime_set_active(max77693->dev);
287 
288         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
289                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
290         if (ret < 0)
291                 goto err_mfd;
292 
293         return ret;
294 
295 err_mfd:
296         mfd_remove_devices(max77693->dev);
297 err_intsrc:
298         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
299 err_irq_muic:
300         regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
301 err_irq_charger:
302         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
303 err_irq_topsys:
304         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
305 err_regmap:
306         i2c_unregister_device(max77693->i2c_haptic);
307 err_i2c_haptic:
308         i2c_unregister_device(max77693->i2c_muic);
309         return ret;
310 }
311 
312 static int max77693_i2c_remove(struct i2c_client *i2c)
313 {
314         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
315 
316         mfd_remove_devices(max77693->dev);
317 
318         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
319         regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
320         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
321         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
322 
323         i2c_unregister_device(max77693->i2c_muic);
324         i2c_unregister_device(max77693->i2c_haptic);
325 
326         return 0;
327 }
328 
329 static const struct i2c_device_id max77693_i2c_id[] = {
330         { "max77693", TYPE_MAX77693 },
331         { }
332 };
333 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
334 
335 static int max77693_suspend(struct device *dev)
336 {
337         struct i2c_client *i2c = to_i2c_client(dev);
338         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
339 
340         if (device_may_wakeup(dev)) {
341                 enable_irq_wake(max77693->irq);
342                 disable_irq(max77693->irq);
343         }
344 
345         return 0;
346 }
347 
348 static int max77693_resume(struct device *dev)
349 {
350         struct i2c_client *i2c = to_i2c_client(dev);
351         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
352 
353         if (device_may_wakeup(dev)) {
354                 disable_irq_wake(max77693->irq);
355                 enable_irq(max77693->irq);
356         }
357 
358         return 0;
359 }
360 
361 static const struct dev_pm_ops max77693_pm = {
362         .suspend = max77693_suspend,
363         .resume = max77693_resume,
364 };
365 
366 #ifdef CONFIG_OF
367 static const struct of_device_id max77693_dt_match[] = {
368         { .compatible = "maxim,max77693" },
369         {},
370 };
371 #endif
372 
373 static struct i2c_driver max77693_i2c_driver = {
374         .driver = {
375                    .name = "max77693",
376                    .pm = &max77693_pm,
377                    .of_match_table = of_match_ptr(max77693_dt_match),
378         },
379         .probe = max77693_i2c_probe,
380         .remove = max77693_i2c_remove,
381         .id_table = max77693_i2c_id,
382 };
383 
384 static int __init max77693_i2c_init(void)
385 {
386         return i2c_add_driver(&max77693_i2c_driver);
387 }
388 /* init early so consumer devices can complete system boot */
389 subsys_initcall(max77693_i2c_init);
390 
391 static void __exit max77693_i2c_exit(void)
392 {
393         i2c_del_driver(&max77693_i2c_driver);
394 }
395 module_exit(max77693_i2c_exit);
396 
397 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
398 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
399 MODULE_LICENSE("GPL");
400 

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