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 { .compatible = "samsung,s2mps11-pmic", 73 .data = (void *)S2MPS11X, 74 }, 75 {}, 76 }; 77 #endif 78 79 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest) 80 { 81 return regmap_read(sec_pmic->regmap, reg, dest); 82 } 83 EXPORT_SYMBOL_GPL(sec_reg_read); 84 85 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 86 { 87 return regmap_bulk_read(sec_pmic->regmap, reg, buf, count); 88 } 89 EXPORT_SYMBOL_GPL(sec_bulk_read); 90 91 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value) 92 { 93 return regmap_write(sec_pmic->regmap, reg, value); 94 } 95 EXPORT_SYMBOL_GPL(sec_reg_write); 96 97 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 98 { 99 return regmap_raw_write(sec_pmic->regmap, reg, buf, count); 100 } 101 EXPORT_SYMBOL_GPL(sec_bulk_write); 102 103 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask) 104 { 105 return regmap_update_bits(sec_pmic->regmap, reg, mask, val); 106 } 107 EXPORT_SYMBOL_GPL(sec_reg_update); 108 109 static bool s2mps11_volatile(struct device *dev, unsigned int reg) 110 { 111 switch (reg) { 112 case S2MPS11_REG_INT1M: 113 case S2MPS11_REG_INT2M: 114 case S2MPS11_REG_INT3M: 115 return false; 116 default: 117 return true; 118 } 119 } 120 121 static bool s5m8763_volatile(struct device *dev, unsigned int reg) 122 { 123 switch (reg) { 124 case S5M8763_REG_IRQM1: 125 case S5M8763_REG_IRQM2: 126 case S5M8763_REG_IRQM3: 127 case S5M8763_REG_IRQM4: 128 return false; 129 default: 130 return true; 131 } 132 } 133 134 static struct regmap_config sec_regmap_config = { 135 .reg_bits = 8, 136 .val_bits = 8, 137 }; 138 139 static struct regmap_config s2mps11_regmap_config = { 140 .reg_bits = 8, 141 .val_bits = 8, 142 143 .max_register = S2MPS11_REG_L38CTRL, 144 .volatile_reg = s2mps11_volatile, 145 .cache_type = REGCACHE_FLAT, 146 }; 147 148 static struct regmap_config s5m8763_regmap_config = { 149 .reg_bits = 8, 150 .val_bits = 8, 151 152 .max_register = S5M8763_REG_LBCNFG2, 153 .volatile_reg = s5m8763_volatile, 154 .cache_type = REGCACHE_FLAT, 155 }; 156 157 static struct regmap_config s5m8767_regmap_config = { 158 .reg_bits = 8, 159 .val_bits = 8, 160 161 .max_register = S5M8767_REG_LDO28CTRL, 162 .volatile_reg = s2mps11_volatile, 163 .cache_type = REGCACHE_FLAT, 164 }; 165 166 #ifdef CONFIG_OF 167 /* 168 * Only the common platform data elements for s5m8767 are parsed here from the 169 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and 170 * others have to parse their own platform data elements from device tree. 171 * 172 * The s5m8767 platform data structure is instantiated here and the drivers for 173 * the sub-modules need not instantiate another instance while parsing their 174 * platform data. 175 */ 176 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 177 struct device *dev) 178 { 179 struct sec_platform_data *pd; 180 181 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 182 if (!pd) { 183 dev_err(dev, "could not allocate memory for pdata\n"); 184 return ERR_PTR(-ENOMEM); 185 } 186 187 /* 188 * ToDo: the 'wakeup' member in the platform data is more of a linux 189 * specfic information. Hence, there is no binding for that yet and 190 * not parsed here. 191 */ 192 193 return pd; 194 } 195 #else 196 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 197 struct device *dev) 198 { 199 return 0; 200 } 201 #endif 202 203 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c, 204 const struct i2c_device_id *id) 205 { 206 #ifdef CONFIG_OF 207 if (i2c->dev.of_node) { 208 const struct of_device_id *match; 209 match = of_match_node(sec_dt_match, i2c->dev.of_node); 210 return (int)match->data; 211 } 212 #endif 213 return (int)id->driver_data; 214 } 215 216 static int sec_pmic_probe(struct i2c_client *i2c, 217 const struct i2c_device_id *id) 218 { 219 struct sec_platform_data *pdata = i2c->dev.platform_data; 220 const struct regmap_config *regmap; 221 struct sec_pmic_dev *sec_pmic; 222 int ret; 223 224 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), 225 GFP_KERNEL); 226 if (sec_pmic == NULL) 227 return -ENOMEM; 228 229 i2c_set_clientdata(i2c, sec_pmic); 230 sec_pmic->dev = &i2c->dev; 231 sec_pmic->i2c = i2c; 232 sec_pmic->irq = i2c->irq; 233 sec_pmic->type = sec_i2c_get_driver_data(i2c, id); 234 235 if (sec_pmic->dev->of_node) { 236 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); 237 if (IS_ERR(pdata)) { 238 ret = PTR_ERR(pdata); 239 return ret; 240 } 241 pdata->device_type = sec_pmic->type; 242 } 243 if (pdata) { 244 sec_pmic->device_type = pdata->device_type; 245 sec_pmic->ono = pdata->ono; 246 sec_pmic->irq_base = pdata->irq_base; 247 sec_pmic->wakeup = pdata->wakeup; 248 sec_pmic->pdata = pdata; 249 } 250 251 switch (sec_pmic->device_type) { 252 case S2MPS11X: 253 regmap = &s2mps11_regmap_config; 254 break; 255 case S5M8763X: 256 regmap = &s5m8763_regmap_config; 257 break; 258 case S5M8767X: 259 regmap = &s5m8767_regmap_config; 260 break; 261 default: 262 regmap = &sec_regmap_config; 263 break; 264 } 265 266 sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap); 267 if (IS_ERR(sec_pmic->regmap)) { 268 ret = PTR_ERR(sec_pmic->regmap); 269 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 270 ret); 271 return ret; 272 } 273 274 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); 275 i2c_set_clientdata(sec_pmic->rtc, sec_pmic); 276 277 if (pdata && pdata->cfg_pmic_irq) 278 pdata->cfg_pmic_irq(); 279 280 sec_irq_init(sec_pmic); 281 282 pm_runtime_set_active(sec_pmic->dev); 283 284 switch (sec_pmic->device_type) { 285 case S5M8751X: 286 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, 287 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); 288 break; 289 case S5M8763X: 290 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, 291 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); 292 break; 293 case S5M8767X: 294 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, 295 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); 296 break; 297 case S2MPS11X: 298 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, 299 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); 300 break; 301 default: 302 /* If this happens the probe function is problem */ 303 BUG(); 304 } 305 306 if (ret) 307 goto err; 308 309 return ret; 310 311 err: 312 sec_irq_exit(sec_pmic); 313 i2c_unregister_device(sec_pmic->rtc); 314 return ret; 315 } 316 317 static int sec_pmic_remove(struct i2c_client *i2c) 318 { 319 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 320 321 mfd_remove_devices(sec_pmic->dev); 322 sec_irq_exit(sec_pmic); 323 i2c_unregister_device(sec_pmic->rtc); 324 return 0; 325 } 326 327 static const struct i2c_device_id sec_pmic_id[] = { 328 { "sec_pmic", 0 }, 329 { } 330 }; 331 MODULE_DEVICE_TABLE(i2c, sec_pmic_id); 332 333 static struct i2c_driver sec_pmic_driver = { 334 .driver = { 335 .name = "sec_pmic", 336 .owner = THIS_MODULE, 337 .of_match_table = of_match_ptr(sec_dt_match), 338 }, 339 .probe = sec_pmic_probe, 340 .remove = sec_pmic_remove, 341 .id_table = sec_pmic_id, 342 }; 343 344 static int __init sec_pmic_init(void) 345 { 346 return i2c_add_driver(&sec_pmic_driver); 347 } 348 349 subsys_initcall(sec_pmic_init); 350 351 static void __exit sec_pmic_exit(void) 352 { 353 i2c_del_driver(&sec_pmic_driver); 354 } 355 module_exit(sec_pmic_exit); 356 357 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 358 MODULE_DESCRIPTION("Core support for the S5M MFD"); 359 MODULE_LICENSE("GPL"); 360