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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         { .name = "max77693-charger", },
 47         { .name = "max77693-flash", },
 48         { .name = "max77693-muic", },
 49         { .name = "max77693-haptic", },
 50 };
 51 
 52 static const struct regmap_config max77693_regmap_config = {
 53         .reg_bits = 8,
 54         .val_bits = 8,
 55         .max_register = MAX77693_PMIC_REG_END,
 56 };
 57 
 58 static const struct regmap_irq max77693_led_irqs[] = {
 59         { .mask = LED_IRQ_FLED2_OPEN,  },
 60         { .mask = LED_IRQ_FLED2_SHORT, },
 61         { .mask = LED_IRQ_FLED1_OPEN,  },
 62         { .mask = LED_IRQ_FLED1_SHORT, },
 63         { .mask = LED_IRQ_MAX_FLASH,   },
 64 };
 65 
 66 static const struct regmap_irq_chip max77693_led_irq_chip = {
 67         .name                   = "max77693-led",
 68         .status_base            = MAX77693_LED_REG_FLASH_INT,
 69         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
 70         .mask_invert            = false,
 71         .num_regs               = 1,
 72         .irqs                   = max77693_led_irqs,
 73         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
 74 };
 75 
 76 static const struct regmap_irq max77693_topsys_irqs[] = {
 77         { .mask = TOPSYS_IRQ_T120C_INT,  },
 78         { .mask = TOPSYS_IRQ_T140C_INT,  },
 79         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
 80 };
 81 
 82 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
 83         .name                   = "max77693-topsys",
 84         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
 85         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
 86         .mask_invert            = false,
 87         .num_regs               = 1,
 88         .irqs                   = max77693_topsys_irqs,
 89         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
 90 };
 91 
 92 static const struct regmap_irq max77693_charger_irqs[] = {
 93         { .mask = CHG_IRQ_BYP_I,   },
 94         { .mask = CHG_IRQ_THM_I,   },
 95         { .mask = CHG_IRQ_BAT_I,   },
 96         { .mask = CHG_IRQ_CHG_I,   },
 97         { .mask = CHG_IRQ_CHGIN_I, },
 98 };
 99 
100 static const struct regmap_irq_chip max77693_charger_irq_chip = {
101         .name                   = "max77693-charger",
102         .status_base            = MAX77693_CHG_REG_CHG_INT,
103         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
104         .mask_invert            = false,
105         .num_regs               = 1,
106         .irqs                   = max77693_charger_irqs,
107         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
108 };
109 
110 static const struct regmap_config max77693_regmap_muic_config = {
111         .reg_bits = 8,
112         .val_bits = 8,
113         .max_register = MAX77693_MUIC_REG_END,
114 };
115 
116 static const struct regmap_irq max77693_muic_irqs[] = {
117         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
118         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
119         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
120         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
121 
122         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
123         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
124         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
125         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
126         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
127         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
128 
129         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
130         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
131         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
132         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
133         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
134         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
135 };
136 
137 static const struct regmap_irq_chip max77693_muic_irq_chip = {
138         .name                   = "max77693-muic",
139         .status_base            = MAX77693_MUIC_REG_INT1,
140         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
141         .mask_invert            = true,
142         .num_regs               = 3,
143         .irqs                   = max77693_muic_irqs,
144         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
145 };
146 
147 static int max77693_i2c_probe(struct i2c_client *i2c,
148                               const struct i2c_device_id *id)
149 {
150         struct max77693_dev *max77693;
151         unsigned int reg_data;
152         int ret = 0;
153 
154         max77693 = devm_kzalloc(&i2c->dev,
155                         sizeof(struct max77693_dev), GFP_KERNEL);
156         if (max77693 == NULL)
157                 return -ENOMEM;
158 
159         i2c_set_clientdata(i2c, max77693);
160         max77693->dev = &i2c->dev;
161         max77693->i2c = i2c;
162         max77693->irq = i2c->irq;
163         max77693->type = id->driver_data;
164 
165         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
166         if (IS_ERR(max77693->regmap)) {
167                 ret = PTR_ERR(max77693->regmap);
168                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
169                                 ret);
170                 return ret;
171         }
172 
173         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
174                                 &reg_data);
175         if (ret < 0) {
176                 dev_err(max77693->dev, "device not found on this channel\n");
177                 return ret;
178         } else
179                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
180 
181         max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
182         if (!max77693->muic) {
183                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
184                 return -ENODEV;
185         }
186         i2c_set_clientdata(max77693->muic, max77693);
187 
188         max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
189         if (!max77693->haptic) {
190                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
191                 ret = -ENODEV;
192                 goto err_i2c_haptic;
193         }
194         i2c_set_clientdata(max77693->haptic, max77693);
195 
196         /*
197          * Initialize register map for MUIC device because use regmap-muic
198          * instance of MUIC device when irq of max77693 is initialized
199          * before call max77693-muic probe() function.
200          */
201         max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
202                                          &max77693_regmap_muic_config);
203         if (IS_ERR(max77693->regmap_muic)) {
204                 ret = PTR_ERR(max77693->regmap_muic);
205                 dev_err(max77693->dev,
206                         "failed to allocate register map: %d\n", ret);
207                 goto err_regmap_muic;
208         }
209 
210         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
211                                 IRQF_ONESHOT | IRQF_SHARED |
212                                 IRQF_TRIGGER_FALLING, 0,
213                                 &max77693_led_irq_chip,
214                                 &max77693->irq_data_led);
215         if (ret) {
216                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
217                 goto err_regmap_muic;
218         }
219 
220         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
221                                 IRQF_ONESHOT | IRQF_SHARED |
222                                 IRQF_TRIGGER_FALLING, 0,
223                                 &max77693_topsys_irq_chip,
224                                 &max77693->irq_data_topsys);
225         if (ret) {
226                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
227                 goto err_irq_topsys;
228         }
229 
230         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
231                                 IRQF_ONESHOT | IRQF_SHARED |
232                                 IRQF_TRIGGER_FALLING, 0,
233                                 &max77693_charger_irq_chip,
234                                 &max77693->irq_data_charger);
235         if (ret) {
236                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
237                 goto err_irq_charger;
238         }
239 
240         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
241                                 IRQF_ONESHOT | IRQF_SHARED |
242                                 IRQF_TRIGGER_FALLING, 0,
243                                 &max77693_muic_irq_chip,
244                                 &max77693->irq_data_muic);
245         if (ret) {
246                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
247                 goto err_irq_muic;
248         }
249 
250         pm_runtime_set_active(max77693->dev);
251 
252         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
253                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
254         if (ret < 0)
255                 goto err_mfd;
256 
257         return ret;
258 
259 err_mfd:
260         mfd_remove_devices(max77693->dev);
261         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
262 err_irq_muic:
263         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
264 err_irq_charger:
265         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
266 err_irq_topsys:
267         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
268 err_regmap_muic:
269         i2c_unregister_device(max77693->haptic);
270 err_i2c_haptic:
271         i2c_unregister_device(max77693->muic);
272         return ret;
273 }
274 
275 static int max77693_i2c_remove(struct i2c_client *i2c)
276 {
277         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
278 
279         mfd_remove_devices(max77693->dev);
280 
281         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
282         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
283         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
284         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
285 
286         i2c_unregister_device(max77693->muic);
287         i2c_unregister_device(max77693->haptic);
288 
289         return 0;
290 }
291 
292 static const struct i2c_device_id max77693_i2c_id[] = {
293         { "max77693", TYPE_MAX77693 },
294         { }
295 };
296 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
297 
298 static int max77693_suspend(struct device *dev)
299 {
300         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
301         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
302 
303         if (device_may_wakeup(dev)) {
304                 enable_irq_wake(max77693->irq);
305                 disable_irq(max77693->irq);
306         }
307 
308         return 0;
309 }
310 
311 static int max77693_resume(struct device *dev)
312 {
313         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
314         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
315 
316         if (device_may_wakeup(dev)) {
317                 disable_irq_wake(max77693->irq);
318                 enable_irq(max77693->irq);
319         }
320 
321         return 0;
322 }
323 
324 static const struct dev_pm_ops max77693_pm = {
325         .suspend = max77693_suspend,
326         .resume = max77693_resume,
327 };
328 
329 #ifdef CONFIG_OF
330 static const struct of_device_id max77693_dt_match[] = {
331         { .compatible = "maxim,max77693" },
332         {},
333 };
334 #endif
335 
336 static struct i2c_driver max77693_i2c_driver = {
337         .driver = {
338                    .name = "max77693",
339                    .owner = THIS_MODULE,
340                    .pm = &max77693_pm,
341                    .of_match_table = of_match_ptr(max77693_dt_match),
342         },
343         .probe = max77693_i2c_probe,
344         .remove = max77693_i2c_remove,
345         .id_table = max77693_i2c_id,
346 };
347 
348 static int __init max77693_i2c_init(void)
349 {
350         return i2c_add_driver(&max77693_i2c_driver);
351 }
352 /* init early so consumer devices can complete system boot */
353 subsys_initcall(max77693_i2c_init);
354 
355 static void __exit max77693_i2c_exit(void)
356 {
357         i2c_del_driver(&max77693_i2c_driver);
358 }
359 module_exit(max77693_i2c_exit);
360 
361 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
362 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
363 MODULE_LICENSE("GPL");
364 

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