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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-private.h>
 37 #include <linux/regulator/machine.h>
 38 #include <linux/regmap.h>
 39 
 40 #define I2C_ADDR_PMIC   (0xCC >> 1)     /* Charger, Flash LED */
 41 #define I2C_ADDR_MUIC   (0x4A >> 1)
 42 #define I2C_ADDR_HAPTIC (0x90 >> 1)
 43 
 44 static const struct mfd_cell max77693_devs[] = {
 45         { .name = "max77693-pmic", },
 46         {
 47                 .name = "max77693-charger",
 48                 .of_compatible = "maxim,max77693-charger",
 49         },
 50         { .name = "max77693-muic", },
 51         {
 52                 .name = "max77693-haptic",
 53                 .of_compatible = "maxim,max77693-haptic",
 54         },
 55         {
 56                 .name = "max77693-led",
 57                 .of_compatible = "maxim,max77693-led",
 58         },
 59 };
 60 
 61 static const struct regmap_config max77693_regmap_config = {
 62         .reg_bits = 8,
 63         .val_bits = 8,
 64         .max_register = MAX77693_PMIC_REG_END,
 65 };
 66 
 67 static const struct regmap_irq max77693_led_irqs[] = {
 68         { .mask = LED_IRQ_FLED2_OPEN,  },
 69         { .mask = LED_IRQ_FLED2_SHORT, },
 70         { .mask = LED_IRQ_FLED1_OPEN,  },
 71         { .mask = LED_IRQ_FLED1_SHORT, },
 72         { .mask = LED_IRQ_MAX_FLASH,   },
 73 };
 74 
 75 static const struct regmap_irq_chip max77693_led_irq_chip = {
 76         .name                   = "max77693-led",
 77         .status_base            = MAX77693_LED_REG_FLASH_INT,
 78         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
 79         .mask_invert            = false,
 80         .num_regs               = 1,
 81         .irqs                   = max77693_led_irqs,
 82         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
 83 };
 84 
 85 static const struct regmap_irq max77693_topsys_irqs[] = {
 86         { .mask = TOPSYS_IRQ_T120C_INT,  },
 87         { .mask = TOPSYS_IRQ_T140C_INT,  },
 88         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
 89 };
 90 
 91 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
 92         .name                   = "max77693-topsys",
 93         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
 94         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
 95         .mask_invert            = false,
 96         .num_regs               = 1,
 97         .irqs                   = max77693_topsys_irqs,
 98         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
 99 };
100 
101 static const struct regmap_irq max77693_charger_irqs[] = {
102         { .mask = CHG_IRQ_BYP_I,   },
103         { .mask = CHG_IRQ_THM_I,   },
104         { .mask = CHG_IRQ_BAT_I,   },
105         { .mask = CHG_IRQ_CHG_I,   },
106         { .mask = CHG_IRQ_CHGIN_I, },
107 };
108 
109 static const struct regmap_irq_chip max77693_charger_irq_chip = {
110         .name                   = "max77693-charger",
111         .status_base            = MAX77693_CHG_REG_CHG_INT,
112         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
113         .mask_invert            = false,
114         .num_regs               = 1,
115         .irqs                   = max77693_charger_irqs,
116         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
117 };
118 
119 static const struct regmap_config max77693_regmap_muic_config = {
120         .reg_bits = 8,
121         .val_bits = 8,
122         .max_register = MAX77693_MUIC_REG_END,
123 };
124 
125 static const struct regmap_irq max77693_muic_irqs[] = {
126         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
127         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
128         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
129         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
130 
131         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
132         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
133         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
134         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
135         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
136         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
137 
138         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
139         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
140         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
141         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
142         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
143         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
144 };
145 
146 static const struct regmap_irq_chip max77693_muic_irq_chip = {
147         .name                   = "max77693-muic",
148         .status_base            = MAX77693_MUIC_REG_INT1,
149         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
150         .mask_invert            = true,
151         .num_regs               = 3,
152         .irqs                   = max77693_muic_irqs,
153         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
154 };
155 
156 static const struct regmap_config max77693_regmap_haptic_config = {
157         .reg_bits = 8,
158         .val_bits = 8,
159         .max_register = MAX77693_HAPTIC_REG_END,
160 };
161 
162 static int max77693_i2c_probe(struct i2c_client *i2c,
163                               const struct i2c_device_id *id)
164 {
165         struct max77693_dev *max77693;
166         unsigned int reg_data;
167         int ret = 0;
168 
169         max77693 = devm_kzalloc(&i2c->dev,
170                         sizeof(struct max77693_dev), GFP_KERNEL);
171         if (max77693 == NULL)
172                 return -ENOMEM;
173 
174         i2c_set_clientdata(i2c, max77693);
175         max77693->dev = &i2c->dev;
176         max77693->i2c = i2c;
177         max77693->irq = i2c->irq;
178         max77693->type = id->driver_data;
179 
180         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
181         if (IS_ERR(max77693->regmap)) {
182                 ret = PTR_ERR(max77693->regmap);
183                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
184                                 ret);
185                 return ret;
186         }
187 
188         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
189                                 &reg_data);
190         if (ret < 0) {
191                 dev_err(max77693->dev, "device not found on this channel\n");
192                 return ret;
193         } else
194                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
195 
196         max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
197         if (!max77693->muic) {
198                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
199                 return -ENODEV;
200         }
201         i2c_set_clientdata(max77693->muic, max77693);
202 
203         max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
204         if (!max77693->haptic) {
205                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
206                 ret = -ENODEV;
207                 goto err_i2c_haptic;
208         }
209         i2c_set_clientdata(max77693->haptic, max77693);
210 
211         max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic,
212                                         &max77693_regmap_haptic_config);
213         if (IS_ERR(max77693->regmap_haptic)) {
214                 ret = PTR_ERR(max77693->regmap_haptic);
215                 dev_err(max77693->dev,
216                         "failed to initialize haptic register map: %d\n", ret);
217                 goto err_regmap;
218         }
219 
220         /*
221          * Initialize register map for MUIC device because use regmap-muic
222          * instance of MUIC device when irq of max77693 is initialized
223          * before call max77693-muic probe() function.
224          */
225         max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
226                                          &max77693_regmap_muic_config);
227         if (IS_ERR(max77693->regmap_muic)) {
228                 ret = PTR_ERR(max77693->regmap_muic);
229                 dev_err(max77693->dev,
230                         "failed to allocate register map: %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_led_irq_chip,
238                                 &max77693->irq_data_led);
239         if (ret) {
240                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
241                 goto err_regmap;
242         }
243 
244         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
245                                 IRQF_ONESHOT | IRQF_SHARED |
246                                 IRQF_TRIGGER_FALLING, 0,
247                                 &max77693_topsys_irq_chip,
248                                 &max77693->irq_data_topsys);
249         if (ret) {
250                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
251                 goto err_irq_topsys;
252         }
253 
254         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
255                                 IRQF_ONESHOT | IRQF_SHARED |
256                                 IRQF_TRIGGER_FALLING, 0,
257                                 &max77693_charger_irq_chip,
258                                 &max77693->irq_data_charger);
259         if (ret) {
260                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
261                 goto err_irq_charger;
262         }
263 
264         ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
265                                 IRQF_ONESHOT | IRQF_SHARED |
266                                 IRQF_TRIGGER_FALLING, 0,
267                                 &max77693_muic_irq_chip,
268                                 &max77693->irq_data_muic);
269         if (ret) {
270                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
271                 goto err_irq_muic;
272         }
273 
274         /* Unmask interrupts from all blocks in interrupt source register */
275         ret = regmap_update_bits(max77693->regmap,
276                                 MAX77693_PMIC_REG_INTSRC_MASK,
277                                 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
278         if (ret < 0) {
279                 dev_err(max77693->dev,
280                         "Could not unmask interrupts in INTSRC: %d\n",
281                         ret);
282                 goto err_intsrc;
283         }
284 
285         pm_runtime_set_active(max77693->dev);
286 
287         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
288                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
289         if (ret < 0)
290                 goto err_mfd;
291 
292         return ret;
293 
294 err_mfd:
295         mfd_remove_devices(max77693->dev);
296 err_intsrc:
297         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
298 err_irq_muic:
299         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
300 err_irq_charger:
301         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
302 err_irq_topsys:
303         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
304 err_regmap:
305         i2c_unregister_device(max77693->haptic);
306 err_i2c_haptic:
307         i2c_unregister_device(max77693->muic);
308         return ret;
309 }
310 
311 static int max77693_i2c_remove(struct i2c_client *i2c)
312 {
313         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
314 
315         mfd_remove_devices(max77693->dev);
316 
317         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
318         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
319         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
320         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
321 
322         i2c_unregister_device(max77693->muic);
323         i2c_unregister_device(max77693->haptic);
324 
325         return 0;
326 }
327 
328 static const struct i2c_device_id max77693_i2c_id[] = {
329         { "max77693", TYPE_MAX77693 },
330         { }
331 };
332 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
333 
334 static int max77693_suspend(struct device *dev)
335 {
336         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
337         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
338 
339         if (device_may_wakeup(dev)) {
340                 enable_irq_wake(max77693->irq);
341                 disable_irq(max77693->irq);
342         }
343 
344         return 0;
345 }
346 
347 static int max77693_resume(struct device *dev)
348 {
349         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
350         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
351 
352         if (device_may_wakeup(dev)) {
353                 disable_irq_wake(max77693->irq);
354                 enable_irq(max77693->irq);
355         }
356 
357         return 0;
358 }
359 
360 static const struct dev_pm_ops max77693_pm = {
361         .suspend = max77693_suspend,
362         .resume = max77693_resume,
363 };
364 
365 #ifdef CONFIG_OF
366 static const struct of_device_id max77693_dt_match[] = {
367         { .compatible = "maxim,max77693" },
368         {},
369 };
370 #endif
371 
372 static struct i2c_driver max77693_i2c_driver = {
373         .driver = {
374                    .name = "max77693",
375                    .owner = THIS_MODULE,
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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