Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 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> |
Sachin Kamat | 71c7f93 | 2013-10-18 16:11:57 +0530 | [diff] [blame] | 31 | #include <linux/of.h> |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 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 | |
Geert Uytterhoeven | 7c0517b | 2013-11-18 14:33:00 +0100 | [diff] [blame] | 44 | static const struct mfd_cell max77693_devs[] = { |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 45 | { .name = "max77693-pmic", }, |
| 46 | { .name = "max77693-charger", }, |
| 47 | { .name = "max77693-flash", }, |
| 48 | { .name = "max77693-muic", }, |
| 49 | { .name = "max77693-haptic", }, |
| 50 | }; |
| 51 | |
| 52 | int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest) |
| 53 | { |
| 54 | unsigned int val; |
| 55 | int ret; |
| 56 | |
| 57 | ret = regmap_read(map, reg, &val); |
| 58 | *dest = val; |
| 59 | |
| 60 | return ret; |
| 61 | } |
| 62 | EXPORT_SYMBOL_GPL(max77693_read_reg); |
| 63 | |
| 64 | int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf) |
| 65 | { |
| 66 | int ret; |
| 67 | |
| 68 | ret = regmap_bulk_read(map, reg, buf, count); |
| 69 | |
| 70 | return ret; |
| 71 | } |
| 72 | EXPORT_SYMBOL_GPL(max77693_bulk_read); |
| 73 | |
| 74 | int max77693_write_reg(struct regmap *map, u8 reg, u8 value) |
| 75 | { |
| 76 | int ret; |
| 77 | |
| 78 | ret = regmap_write(map, reg, value); |
| 79 | |
| 80 | return ret; |
| 81 | } |
| 82 | EXPORT_SYMBOL_GPL(max77693_write_reg); |
| 83 | |
| 84 | int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf) |
| 85 | { |
| 86 | int ret; |
| 87 | |
| 88 | ret = regmap_bulk_write(map, reg, buf, count); |
| 89 | |
| 90 | return ret; |
| 91 | } |
| 92 | EXPORT_SYMBOL_GPL(max77693_bulk_write); |
| 93 | |
| 94 | int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask) |
| 95 | { |
| 96 | int ret; |
| 97 | |
| 98 | ret = regmap_update_bits(map, reg, mask, val); |
| 99 | |
| 100 | return ret; |
| 101 | } |
| 102 | EXPORT_SYMBOL_GPL(max77693_update_reg); |
| 103 | |
| 104 | static const struct regmap_config max77693_regmap_config = { |
| 105 | .reg_bits = 8, |
| 106 | .val_bits = 8, |
| 107 | .max_register = MAX77693_PMIC_REG_END, |
| 108 | }; |
| 109 | |
| 110 | static int max77693_i2c_probe(struct i2c_client *i2c, |
| 111 | const struct i2c_device_id *id) |
| 112 | { |
| 113 | struct max77693_dev *max77693; |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 114 | u8 reg_data; |
| 115 | int ret = 0; |
| 116 | |
| 117 | max77693 = devm_kzalloc(&i2c->dev, |
| 118 | sizeof(struct max77693_dev), GFP_KERNEL); |
| 119 | if (max77693 == NULL) |
| 120 | return -ENOMEM; |
| 121 | |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 122 | i2c_set_clientdata(i2c, max77693); |
| 123 | max77693->dev = &i2c->dev; |
| 124 | max77693->i2c = i2c; |
| 125 | max77693->irq = i2c->irq; |
| 126 | max77693->type = id->driver_data; |
| 127 | |
Axel Lin | 2429d86 | 2012-12-25 00:28:36 +0800 | [diff] [blame] | 128 | max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); |
| 129 | if (IS_ERR(max77693->regmap)) { |
| 130 | ret = PTR_ERR(max77693->regmap); |
| 131 | dev_err(max77693->dev, "failed to allocate register map: %d\n", |
| 132 | ret); |
| 133 | return ret; |
| 134 | } |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 135 | |
Axel Lin | 2429d86 | 2012-12-25 00:28:36 +0800 | [diff] [blame] | 136 | ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, |
| 137 | ®_data); |
| 138 | if (ret < 0) { |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 139 | dev_err(max77693->dev, "device not found on this channel\n"); |
Axel Lin | 2429d86 | 2012-12-25 00:28:36 +0800 | [diff] [blame] | 140 | return ret; |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 141 | } else |
| 142 | dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); |
| 143 | |
| 144 | max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); |
| 145 | i2c_set_clientdata(max77693->muic, max77693); |
| 146 | |
| 147 | max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); |
| 148 | i2c_set_clientdata(max77693->haptic, max77693); |
| 149 | |
Chanwoo Choi | b186b12 | 2012-08-21 15:16:23 +0900 | [diff] [blame] | 150 | /* |
| 151 | * Initialize register map for MUIC device because use regmap-muic |
| 152 | * instance of MUIC device when irq of max77693 is initialized |
| 153 | * before call max77693-muic probe() function. |
| 154 | */ |
| 155 | max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, |
| 156 | &max77693_regmap_config); |
| 157 | if (IS_ERR(max77693->regmap_muic)) { |
| 158 | ret = PTR_ERR(max77693->regmap_muic); |
| 159 | dev_err(max77693->dev, |
| 160 | "failed to allocate register map: %d\n", ret); |
Axel Lin | 2429d86 | 2012-12-25 00:28:36 +0800 | [diff] [blame] | 161 | goto err_regmap_muic; |
Chanwoo Choi | b186b12 | 2012-08-21 15:16:23 +0900 | [diff] [blame] | 162 | } |
| 163 | |
Chanwoo Choi | 6592ebb | 2012-05-14 22:54:20 +0200 | [diff] [blame] | 164 | ret = max77693_irq_init(max77693); |
| 165 | if (ret < 0) |
Axel Lin | ff2b7ac | 2012-06-08 08:35:37 +0800 | [diff] [blame] | 166 | goto err_irq; |
Chanwoo Choi | 6592ebb | 2012-05-14 22:54:20 +0200 | [diff] [blame] | 167 | |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 168 | pm_runtime_set_active(max77693->dev); |
| 169 | |
| 170 | ret = mfd_add_devices(max77693->dev, -1, max77693_devs, |
Mark Brown | 0848c94 | 2012-09-11 15:16:36 +0800 | [diff] [blame] | 171 | ARRAY_SIZE(max77693_devs), NULL, 0, NULL); |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 172 | if (ret < 0) |
| 173 | goto err_mfd; |
| 174 | |
| 175 | return ret; |
| 176 | |
| 177 | err_mfd: |
Axel Lin | ff2b7ac | 2012-06-08 08:35:37 +0800 | [diff] [blame] | 178 | max77693_irq_exit(max77693); |
| 179 | err_irq: |
Axel Lin | 2429d86 | 2012-12-25 00:28:36 +0800 | [diff] [blame] | 180 | err_regmap_muic: |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 181 | i2c_unregister_device(max77693->muic); |
| 182 | i2c_unregister_device(max77693->haptic); |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 183 | return ret; |
| 184 | } |
| 185 | |
| 186 | static int max77693_i2c_remove(struct i2c_client *i2c) |
| 187 | { |
| 188 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); |
| 189 | |
| 190 | mfd_remove_devices(max77693->dev); |
Axel Lin | ff2b7ac | 2012-06-08 08:35:37 +0800 | [diff] [blame] | 191 | max77693_irq_exit(max77693); |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 192 | i2c_unregister_device(max77693->muic); |
| 193 | i2c_unregister_device(max77693->haptic); |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | static const struct i2c_device_id max77693_i2c_id[] = { |
| 199 | { "max77693", TYPE_MAX77693 }, |
| 200 | { } |
| 201 | }; |
| 202 | MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); |
| 203 | |
Chanwoo Choi | 6592ebb | 2012-05-14 22:54:20 +0200 | [diff] [blame] | 204 | static int max77693_suspend(struct device *dev) |
| 205 | { |
| 206 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); |
| 207 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); |
| 208 | |
| 209 | if (device_may_wakeup(dev)) |
| 210 | irq_set_irq_wake(max77693->irq, 1); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int max77693_resume(struct device *dev) |
| 215 | { |
| 216 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); |
| 217 | struct max77693_dev *max77693 = i2c_get_clientdata(i2c); |
| 218 | |
| 219 | if (device_may_wakeup(dev)) |
| 220 | irq_set_irq_wake(max77693->irq, 0); |
| 221 | return max77693_irq_resume(max77693); |
| 222 | } |
| 223 | |
Mark Brown | 12477a3 | 2012-06-05 16:15:59 +0100 | [diff] [blame] | 224 | static const struct dev_pm_ops max77693_pm = { |
Chanwoo Choi | 6592ebb | 2012-05-14 22:54:20 +0200 | [diff] [blame] | 225 | .suspend = max77693_suspend, |
| 226 | .resume = max77693_resume, |
| 227 | }; |
| 228 | |
Andrzej Hajda | 4657185 | 2013-09-27 09:27:46 +0200 | [diff] [blame] | 229 | #ifdef CONFIG_OF |
| 230 | static struct of_device_id max77693_dt_match[] = { |
| 231 | { .compatible = "maxim,max77693" }, |
| 232 | {}, |
| 233 | }; |
| 234 | #endif |
| 235 | |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 236 | static struct i2c_driver max77693_i2c_driver = { |
| 237 | .driver = { |
| 238 | .name = "max77693", |
| 239 | .owner = THIS_MODULE, |
Chanwoo Choi | 6592ebb | 2012-05-14 22:54:20 +0200 | [diff] [blame] | 240 | .pm = &max77693_pm, |
Andrzej Hajda | 4657185 | 2013-09-27 09:27:46 +0200 | [diff] [blame] | 241 | .of_match_table = of_match_ptr(max77693_dt_match), |
Chanwoo Choi | 83871c0 | 2012-05-14 22:50:39 +0200 | [diff] [blame] | 242 | }, |
| 243 | .probe = max77693_i2c_probe, |
| 244 | .remove = max77693_i2c_remove, |
| 245 | .id_table = max77693_i2c_id, |
| 246 | }; |
| 247 | |
| 248 | static int __init max77693_i2c_init(void) |
| 249 | { |
| 250 | return i2c_add_driver(&max77693_i2c_driver); |
| 251 | } |
| 252 | /* init early so consumer devices can complete system boot */ |
| 253 | subsys_initcall(max77693_i2c_init); |
| 254 | |
| 255 | static void __exit max77693_i2c_exit(void) |
| 256 | { |
| 257 | i2c_del_driver(&max77693_i2c_driver); |
| 258 | } |
| 259 | module_exit(max77693_i2c_exit); |
| 260 | |
| 261 | MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); |
| 262 | MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); |
| 263 | MODULE_LICENSE("GPL"); |