Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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-muic", },
 48         { .name = "max77693-haptic", },
 49         {
 50                 .name = "max77693-flash",
 51                 .of_compatible = "maxim,max77693-flash",
 52         },
 53 };
 54 
 55 static const struct regmap_config max77693_regmap_config = {
 56         .reg_bits = 8,
 57         .val_bits = 8,
 58         .max_register = MAX77693_PMIC_REG_END,
 59 };
 60 
 61 static const struct regmap_irq max77693_led_irqs[] = {
 62         { .mask = LED_IRQ_FLED2_OPEN,  },
 63         { .mask = LED_IRQ_FLED2_SHORT, },
 64         { .mask = LED_IRQ_FLED1_OPEN,  },
 65         { .mask = LED_IRQ_FLED1_SHORT, },
 66         { .mask = LED_IRQ_MAX_FLASH,   },
 67 };
 68 
 69 static const struct regmap_irq_chip max77693_led_irq_chip = {
 70         .name                   = "max77693-led",
 71         .status_base            = MAX77693_LED_REG_FLASH_INT,
 72         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
 73         .mask_invert            = false,
 74         .num_regs               = 1,
 75         .irqs                   = max77693_led_irqs,
 76         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
 77 };
 78 
 79 static const struct regmap_irq max77693_topsys_irqs[] = {
 80         { .mask = TOPSYS_IRQ_T120C_INT,  },
 81         { .mask = TOPSYS_IRQ_T140C_INT,  },
 82         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
 83 };
 84 
 85 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
 86         .name                   = "max77693-topsys",
 87         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
 88         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
 89         .mask_invert            = false,
 90         .num_regs               = 1,
 91         .irqs                   = max77693_topsys_irqs,
 92         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
 93 };
 94 
 95 static const struct regmap_irq max77693_charger_irqs[] = {
 96         { .mask = CHG_IRQ_BYP_I,   },
 97         { .mask = CHG_IRQ_THM_I,   },
 98         { .mask = CHG_IRQ_BAT_I,   },
 99         { .mask = CHG_IRQ_CHG_I,   },
100         { .mask = CHG_IRQ_CHGIN_I, },
101 };
102 
103 static const struct regmap_irq_chip max77693_charger_irq_chip = {
104         .name                   = "max77693-charger",
105         .status_base            = MAX77693_CHG_REG_CHG_INT,
106         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
107         .mask_invert            = false,
108         .num_regs               = 1,
109         .irqs                   = max77693_charger_irqs,
110         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
111 };
112 
113 static const struct regmap_config max77693_regmap_muic_config = {
114         .reg_bits = 8,
115         .val_bits = 8,
116         .max_register = MAX77693_MUIC_REG_END,
117 };
118 
119 static const struct regmap_irq max77693_muic_irqs[] = {
120         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
121         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
122         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
123         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
124 
125         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
126         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
127         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
128         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
129         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
130         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
131 
132         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
133         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
134         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
135         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
136         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
137         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
138 };
139 
140 static const struct regmap_irq_chip max77693_muic_irq_chip = {
141         .name                   = "max77693-muic",
142         .status_base            = MAX77693_MUIC_REG_INT1,
143         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
144         .mask_invert            = true,
145         .num_regs               = 3,
146         .irqs                   = max77693_muic_irqs,
147         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
148 };
149 
150 static int max77693_i2c_probe(struct i2c_client *i2c,
151                               const struct i2c_device_id *id)
152 {
153         struct max77693_dev *max77693;
154         unsigned int reg_data;
155         int ret = 0;
156 
157         max77693 = devm_kzalloc(&i2c->dev,
158                         sizeof(struct max77693_dev), GFP_KERNEL);
159         if (max77693 == NULL)
160                 return -ENOMEM;
161 
162         i2c_set_clientdata(i2c, max77693);
163         max77693->dev = &i2c->dev;
164         max77693->i2c = i2c;
165         max77693->irq = i2c->irq;
166         max77693->type = id->driver_data;
167 
168         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
169         if (IS_ERR(max77693->regmap)) {
170                 ret = PTR_ERR(max77693->regmap);
171                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
172                                 ret);
173                 return ret;
174         }
175 
176         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
177                                 &reg_data);
178         if (ret < 0) {
179                 dev_err(max77693->dev, "device not found on this channel\n");
180                 return ret;
181         } else
182                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
183 
184         max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
185         if (!max77693->muic) {
186                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
187                 return -ENODEV;
188         }
189         i2c_set_clientdata(max77693->muic, max77693);
190 
191         max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
192         if (!max77693->haptic) {
193                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
194                 ret = -ENODEV;
195                 goto err_i2c_haptic;
196         }
197         i2c_set_clientdata(max77693->haptic, max77693);
198 
199         /*
200          * Initialize register map for MUIC device because use regmap-muic
201          * instance of MUIC device when irq of max77693 is initialized
202          * before call max77693-muic probe() function.
203          */
204         max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
205                                          &max77693_regmap_muic_config);
206         if (IS_ERR(max77693->regmap_muic)) {
207                 ret = PTR_ERR(max77693->regmap_muic);
208                 dev_err(max77693->dev,
209                         "failed to allocate register map: %d\n", ret);
210                 goto err_regmap_muic;
211         }
212 
213         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
214                                 IRQF_ONESHOT | IRQF_SHARED |
215                                 IRQF_TRIGGER_FALLING, 0,
216                                 &max77693_led_irq_chip,
217                                 &max77693->irq_data_led);
218         if (ret) {
219                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
220                 goto err_regmap_muic;
221         }
222 
223         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
224                                 IRQF_ONESHOT | IRQF_SHARED |
225                                 IRQF_TRIGGER_FALLING, 0,
226                                 &max77693_topsys_irq_chip,
227                                 &max77693->irq_data_topsys);
228         if (ret) {
229                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
230                 goto err_irq_topsys;
231         }
232 
233         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
234                                 IRQF_ONESHOT | IRQF_SHARED |
235                                 IRQF_TRIGGER_FALLING, 0,
236                                 &max77693_charger_irq_chip,
237                                 &max77693->irq_data_charger);
238         if (ret) {
239                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
240                 goto err_irq_charger;
241         }
242 
243         ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
244                                 IRQF_ONESHOT | IRQF_SHARED |
245                                 IRQF_TRIGGER_FALLING, 0,
246                                 &max77693_muic_irq_chip,
247                                 &max77693->irq_data_muic);
248         if (ret) {
249                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
250                 goto err_irq_muic;
251         }
252 
253         /* Unmask interrupts from all blocks in interrupt source register */
254         ret = regmap_update_bits(max77693->regmap,
255                                 MAX77693_PMIC_REG_INTSRC_MASK,
256                                 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
257         if (ret < 0) {
258                 dev_err(max77693->dev,
259                         "Could not unmask interrupts in INTSRC: %d\n",
260                         ret);
261                 goto err_intsrc;
262         }
263 
264         pm_runtime_set_active(max77693->dev);
265 
266         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
267                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
268         if (ret < 0)
269                 goto err_mfd;
270 
271         return ret;
272 
273 err_mfd:
274         mfd_remove_devices(max77693->dev);
275 err_intsrc:
276         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
277 err_irq_muic:
278         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
279 err_irq_charger:
280         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
281 err_irq_topsys:
282         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
283 err_regmap_muic:
284         i2c_unregister_device(max77693->haptic);
285 err_i2c_haptic:
286         i2c_unregister_device(max77693->muic);
287         return ret;
288 }
289 
290 static int max77693_i2c_remove(struct i2c_client *i2c)
291 {
292         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
293 
294         mfd_remove_devices(max77693->dev);
295 
296         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
297         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
298         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
299         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
300 
301         i2c_unregister_device(max77693->muic);
302         i2c_unregister_device(max77693->haptic);
303 
304         return 0;
305 }
306 
307 static const struct i2c_device_id max77693_i2c_id[] = {
308         { "max77693", TYPE_MAX77693 },
309         { }
310 };
311 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
312 
313 static int max77693_suspend(struct device *dev)
314 {
315         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
316         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
317 
318         if (device_may_wakeup(dev)) {
319                 enable_irq_wake(max77693->irq);
320                 disable_irq(max77693->irq);
321         }
322 
323         return 0;
324 }
325 
326 static int max77693_resume(struct device *dev)
327 {
328         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
329         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
330 
331         if (device_may_wakeup(dev)) {
332                 disable_irq_wake(max77693->irq);
333                 enable_irq(max77693->irq);
334         }
335 
336         return 0;
337 }
338 
339 static const struct dev_pm_ops max77693_pm = {
340         .suspend = max77693_suspend,
341         .resume = max77693_resume,
342 };
343 
344 #ifdef CONFIG_OF
345 static const struct of_device_id max77693_dt_match[] = {
346         { .compatible = "maxim,max77693" },
347         {},
348 };
349 #endif
350 
351 static struct i2c_driver max77693_i2c_driver = {
352         .driver = {
353                    .name = "max77693",
354                    .owner = THIS_MODULE,
355                    .pm = &max77693_pm,
356                    .of_match_table = of_match_ptr(max77693_dt_match),
357         },
358         .probe = max77693_i2c_probe,
359         .remove = max77693_i2c_remove,
360         .id_table = max77693_i2c_id,
361 };
362 
363 static int __init max77693_i2c_init(void)
364 {
365         return i2c_add_driver(&max77693_i2c_driver);
366 }
367 /* init early so consumer devices can complete system boot */
368 subsys_initcall(max77693_i2c_init);
369 
370 static void __exit max77693_i2c_exit(void)
371 {
372         i2c_del_driver(&max77693_i2c_driver);
373 }
374 module_exit(max77693_i2c_exit);
375 
376 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
377 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
378 MODULE_LICENSE("GPL");
379 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us