1 /* 2 * sec-core.c 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd 5 * http://www.samsung.com 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/err.h> 18 #include <linux/slab.h> 19 #include <linux/i2c.h> 20 #include <linux/of_irq.h> 21 #include <linux/interrupt.h> 22 #include <linux/pm_runtime.h> 23 #include <linux/mutex.h> 24 #include <linux/mfd/core.h> 25 #include <linux/mfd/samsung/core.h> 26 #include <linux/mfd/samsung/irq.h> 27 #include <linux/mfd/samsung/rtc.h> 28 #include <linux/mfd/samsung/s2mps11.h> 29 #include <linux/mfd/samsung/s5m8763.h> 30 #include <linux/mfd/samsung/s5m8767.h> 31 #include <linux/regmap.h> 32 33 static struct mfd_cell s5m8751_devs[] = { 34 { 35 .name = "s5m8751-pmic", 36 }, { 37 .name = "s5m-charger", 38 }, { 39 .name = "s5m8751-codec", 40 }, 41 }; 42 43 static struct mfd_cell s5m8763_devs[] = { 44 { 45 .name = "s5m8763-pmic", 46 }, { 47 .name = "s5m-rtc", 48 }, { 49 .name = "s5m-charger", 50 }, 51 }; 52 53 static struct mfd_cell s5m8767_devs[] = { 54 { 55 .name = "s5m8767-pmic", 56 }, { 57 .name = "s5m-rtc", 58 }, 59 }; 60 61 static struct mfd_cell s2mps11_devs[] = { 62 { 63 .name = "s2mps11-pmic", 64 }, 65 }; 66 67 #ifdef CONFIG_OF 68 static struct of_device_id sec_dt_match[] = { 69 { .compatible = "samsung,s5m8767-pmic", 70 .data = (void *)S5M8767X, 71 }, 72 {}, 73 }; 74 #endif 75 76 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest) 77 { 78 return regmap_read(sec_pmic->regmap, reg, dest); 79 } 80 EXPORT_SYMBOL_GPL(sec_reg_read); 81 82 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 83 { 84 return regmap_bulk_read(sec_pmic->regmap, reg, buf, count); 85 } 86 EXPORT_SYMBOL_GPL(sec_bulk_read); 87 88 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value) 89 { 90 return regmap_write(sec_pmic->regmap, reg, value); 91 } 92 EXPORT_SYMBOL_GPL(sec_reg_write); 93 94 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 95 { 96 return regmap_raw_write(sec_pmic->regmap, reg, buf, count); 97 } 98 EXPORT_SYMBOL_GPL(sec_bulk_write); 99 100 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask) 101 { 102 return regmap_update_bits(sec_pmic->regmap, reg, mask, val); 103 } 104 EXPORT_SYMBOL_GPL(sec_reg_update); 105 106 static struct regmap_config sec_regmap_config = { 107 .reg_bits = 8, 108 .val_bits = 8, 109 }; 110 111 static struct regmap_config s2mps11_regmap_config = { 112 .reg_bits = 8, 113 .val_bits = 8, 114 115 .max_register = S2MPS11_REG_L38CTRL, 116 }; 117 118 static struct regmap_config s5m8763_regmap_config = { 119 .reg_bits = 8, 120 .val_bits = 8, 121 122 .max_register = S5M8763_REG_LBCNFG2, 123 }; 124 125 static struct regmap_config s5m8767_regmap_config = { 126 .reg_bits = 8, 127 .val_bits = 8, 128 129 .max_register = S5M8767_REG_LDO28CTRL, 130 }; 131 132 #ifdef CONFIG_OF 133 /* 134 * Only the common platform data elements for s5m8767 are parsed here from the 135 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and 136 * others have to parse their own platform data elements from device tree. 137 * 138 * The s5m8767 platform data structure is instantiated here and the drivers for 139 * the sub-modules need not instantiate another instance while parsing their 140 * platform data. 141 */ 142 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 143 struct device *dev) 144 { 145 struct sec_platform_data *pd; 146 147 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 148 if (!pd) { 149 dev_err(dev, "could not allocate memory for pdata\n"); 150 return ERR_PTR(-ENOMEM); 151 } 152 153 /* 154 * ToDo: the 'wakeup' member in the platform data is more of a linux 155 * specfic information. Hence, there is no binding for that yet and 156 * not parsed here. 157 */ 158 159 return pd; 160 } 161 #else 162 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 163 struct device *dev) 164 { 165 return 0; 166 } 167 #endif 168 169 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c, 170 const struct i2c_device_id *id) 171 { 172 #ifdef CONFIG_OF 173 if (i2c->dev.of_node) { 174 const struct of_device_id *match; 175 match = of_match_node(sec_dt_match, i2c->dev.of_node); 176 return (int)match->data; 177 } 178 #endif 179 return (int)id->driver_data; 180 } 181 182 static int sec_pmic_probe(struct i2c_client *i2c, 183 const struct i2c_device_id *id) 184 { 185 struct sec_platform_data *pdata = i2c->dev.platform_data; 186 const struct regmap_config *regmap; 187 struct sec_pmic_dev *sec_pmic; 188 int ret; 189 190 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), 191 GFP_KERNEL); 192 if (sec_pmic == NULL) 193 return -ENOMEM; 194 195 i2c_set_clientdata(i2c, sec_pmic); 196 sec_pmic->dev = &i2c->dev; 197 sec_pmic->i2c = i2c; 198 sec_pmic->irq = i2c->irq; 199 sec_pmic->type = sec_i2c_get_driver_data(i2c, id); 200 201 if (sec_pmic->dev->of_node) { 202 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); 203 if (IS_ERR(pdata)) { 204 ret = PTR_ERR(pdata); 205 return ret; 206 } 207 pdata->device_type = sec_pmic->type; 208 } 209 if (pdata) { 210 sec_pmic->device_type = pdata->device_type; 211 sec_pmic->ono = pdata->ono; 212 sec_pmic->irq_base = pdata->irq_base; 213 sec_pmic->wakeup = pdata->wakeup; 214 sec_pmic->pdata = pdata; 215 } 216 217 switch (sec_pmic->device_type) { 218 case S2MPS11X: 219 regmap = &s2mps11_regmap_config; 220 break; 221 case S5M8763X: 222 regmap = &s5m8763_regmap_config; 223 break; 224 case S5M8767X: 225 regmap = &s5m8767_regmap_config; 226 break; 227 default: 228 regmap = &sec_regmap_config; 229 break; 230 } 231 232 sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap); 233 if (IS_ERR(sec_pmic->regmap)) { 234 ret = PTR_ERR(sec_pmic->regmap); 235 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 236 ret); 237 return ret; 238 } 239 240 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); 241 i2c_set_clientdata(sec_pmic->rtc, sec_pmic); 242 243 if (pdata && pdata->cfg_pmic_irq) 244 pdata->cfg_pmic_irq(); 245 246 sec_irq_init(sec_pmic); 247 248 pm_runtime_set_active(sec_pmic->dev); 249 250 switch (sec_pmic->device_type) { 251 case S5M8751X: 252 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, 253 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); 254 break; 255 case S5M8763X: 256 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, 257 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); 258 break; 259 case S5M8767X: 260 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, 261 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); 262 break; 263 case S2MPS11X: 264 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, 265 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); 266 break; 267 default: 268 /* If this happens the probe function is problem */ 269 BUG(); 270 } 271 272 if (ret) 273 goto err; 274 275 return ret; 276 277 err: 278 sec_irq_exit(sec_pmic); 279 i2c_unregister_device(sec_pmic->rtc); 280 return ret; 281 } 282 283 static int sec_pmic_remove(struct i2c_client *i2c) 284 { 285 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 286 287 mfd_remove_devices(sec_pmic->dev); 288 sec_irq_exit(sec_pmic); 289 i2c_unregister_device(sec_pmic->rtc); 290 return 0; 291 } 292 293 static const struct i2c_device_id sec_pmic_id[] = { 294 { "sec_pmic", 0 }, 295 { } 296 }; 297 MODULE_DEVICE_TABLE(i2c, sec_pmic_id); 298 299 static struct i2c_driver sec_pmic_driver = { 300 .driver = { 301 .name = "sec_pmic", 302 .owner = THIS_MODULE, 303 .of_match_table = of_match_ptr(sec_dt_match), 304 }, 305 .probe = sec_pmic_probe, 306 .remove = sec_pmic_remove, 307 .id_table = sec_pmic_id, 308 }; 309 310 static int __init sec_pmic_init(void) 311 { 312 return i2c_add_driver(&sec_pmic_driver); 313 } 314 315 subsys_initcall(sec_pmic_init); 316 317 static void __exit sec_pmic_exit(void) 318 { 319 i2c_del_driver(&sec_pmic_driver); 320 } 321 module_exit(sec_pmic_exit); 322 323 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 324 MODULE_DESCRIPTION("Core support for the S5M MFD"); 325 MODULE_LICENSE("GPL"); 326