2 * max77693.c - mfd core driver for the MAX 77693
4 * Copyright (C) 2012 Samsung Electronics
5 * SangYoung Son <hello.son@smasung.com>
7 * This program is not provided / owned by Maxim Integrated Products.
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.
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.
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
23 * This driver is based on max8997.c
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/pm_runtime.h>
32 #include <linux/mutex.h>
33 #include <linux/mfd/core.h>
34 #include <linux/mfd/max77693.h>
35 #include <linux/mfd/max77693-private.h>
36 #include <linux/regulator/machine.h>
37 #include <linux/regmap.h>
39 #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
40 #define I2C_ADDR_MUIC (0x4A >> 1)
41 #define I2C_ADDR_HAPTIC (0x90 >> 1)
43 static struct mfd_cell max77693_devs[] = {
44 { .name = "max77693-pmic", },
45 { .name = "max77693-charger", },
46 { .name = "max77693-flash", },
47 { .name = "max77693-muic", },
48 { .name = "max77693-haptic", },
51 int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
56 ret = regmap_read(map, reg, &val);
61 EXPORT_SYMBOL_GPL(max77693_read_reg);
63 int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
67 ret = regmap_bulk_read(map, reg, buf, count);
71 EXPORT_SYMBOL_GPL(max77693_bulk_read);
73 int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
77 ret = regmap_write(map, reg, value);
81 EXPORT_SYMBOL_GPL(max77693_write_reg);
83 int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
87 ret = regmap_bulk_write(map, reg, buf, count);
91 EXPORT_SYMBOL_GPL(max77693_bulk_write);
93 int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
97 ret = regmap_update_bits(map, reg, mask, val);
101 EXPORT_SYMBOL_GPL(max77693_update_reg);
103 static const struct regmap_config max77693_regmap_config = {
106 .max_register = MAX77693_PMIC_REG_END,
109 static int max77693_i2c_probe(struct i2c_client *i2c,
110 const struct i2c_device_id *id)
112 struct max77693_dev *max77693;
113 struct max77693_platform_data *pdata = i2c->dev.platform_data;
117 max77693 = devm_kzalloc(&i2c->dev,
118 sizeof(struct max77693_dev), GFP_KERNEL);
119 if (max77693 == NULL)
122 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
123 if (IS_ERR(max77693->regmap)) {
124 ret = PTR_ERR(max77693->regmap);
125 dev_err(max77693->dev,"failed to allocate register map: %d\n",
130 i2c_set_clientdata(i2c, max77693);
131 max77693->dev = &i2c->dev;
133 max77693->irq = i2c->irq;
134 max77693->type = id->driver_data;
139 max77693->wakeup = pdata->wakeup;
141 if (max77693_read_reg(max77693->regmap,
142 MAX77693_PMIC_REG_PMIC_ID2, ®_data) < 0) {
143 dev_err(max77693->dev, "device not found on this channel\n");
147 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
149 max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
150 i2c_set_clientdata(max77693->muic, max77693);
152 max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
153 i2c_set_clientdata(max77693->haptic, max77693);
156 * Initialize register map for MUIC device because use regmap-muic
157 * instance of MUIC device when irq of max77693 is initialized
158 * before call max77693-muic probe() function.
160 max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
161 &max77693_regmap_config);
162 if (IS_ERR(max77693->regmap_muic)) {
163 ret = PTR_ERR(max77693->regmap_muic);
164 dev_err(max77693->dev,
165 "failed to allocate register map: %d\n", ret);
169 ret = max77693_irq_init(max77693);
173 pm_runtime_set_active(max77693->dev);
175 ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
176 ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
180 device_init_wakeup(max77693->dev, pdata->wakeup);
185 max77693_irq_exit(max77693);
187 i2c_unregister_device(max77693->muic);
188 i2c_unregister_device(max77693->haptic);
193 static int max77693_i2c_remove(struct i2c_client *i2c)
195 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
197 mfd_remove_devices(max77693->dev);
198 max77693_irq_exit(max77693);
199 i2c_unregister_device(max77693->muic);
200 i2c_unregister_device(max77693->haptic);
205 static const struct i2c_device_id max77693_i2c_id[] = {
206 { "max77693", TYPE_MAX77693 },
209 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
211 static int max77693_suspend(struct device *dev)
213 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
214 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
216 if (device_may_wakeup(dev))
217 irq_set_irq_wake(max77693->irq, 1);
221 static int max77693_resume(struct device *dev)
223 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
224 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
226 if (device_may_wakeup(dev))
227 irq_set_irq_wake(max77693->irq, 0);
228 return max77693_irq_resume(max77693);
231 static const struct dev_pm_ops max77693_pm = {
232 .suspend = max77693_suspend,
233 .resume = max77693_resume,
236 static struct i2c_driver max77693_i2c_driver = {
239 .owner = THIS_MODULE,
242 .probe = max77693_i2c_probe,
243 .remove = max77693_i2c_remove,
244 .id_table = max77693_i2c_id,
247 static int __init max77693_i2c_init(void)
249 return i2c_add_driver(&max77693_i2c_driver);
251 /* init early so consumer devices can complete system boot */
252 subsys_initcall(max77693_i2c_init);
254 static void __exit max77693_i2c_exit(void)
256 i2c_del_driver(&max77693_i2c_driver);
258 module_exit(max77693_i2c_exit);
260 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
261 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
262 MODULE_LICENSE("GPL");