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.h> 21 #include <linux/of_irq.h> 22 #include <linux/interrupt.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/mutex.h> 25 #include <linux/mfd/core.h> 26 #include <linux/mfd/samsung/core.h> 27 #include <linux/mfd/samsung/irq.h> 28 #include <linux/mfd/samsung/rtc.h> 29 #include <linux/mfd/samsung/s2mps11.h> 30 #include <linux/mfd/samsung/s5m8763.h> 31 #include <linux/mfd/samsung/s5m8767.h> 32 #include <linux/regmap.h> 33 34 static struct mfd_cell s5m8751_devs[] = { 35 { 36 .name = "s5m8751-pmic", 37 }, { 38 .name = "s5m-charger", 39 }, { 40 .name = "s5m8751-codec", 41 }, 42 }; 43 44 static struct mfd_cell s5m8763_devs[] = { 45 { 46 .name = "s5m8763-pmic", 47 }, { 48 .name = "s5m-rtc", 49 }, { 50 .name = "s5m-charger", 51 }, 52 }; 53 54 static struct mfd_cell s5m8767_devs[] = { 55 { 56 .name = "s5m8767-pmic", 57 }, { 58 .name = "s5m-rtc", 59 }, 60 }; 61 62 static struct mfd_cell s2mps11_devs[] = { 63 { 64 .name = "s2mps11-pmic", 65 }, { 66 .name = "s2mps11-clk", 67 } 68 }; 69 70 #ifdef CONFIG_OF 71 static struct of_device_id sec_dt_match[] = { 72 { .compatible = "samsung,s5m8767-pmic", 73 .data = (void *)S5M8767X, 74 }, 75 { .compatible = "samsung,s2mps11-pmic", 76 .data = (void *)S2MPS11X, 77 }, 78 {}, 79 }; 80 #endif 81 82 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest) 83 { 84 return regmap_read(sec_pmic->regmap, reg, dest); 85 } 86 EXPORT_SYMBOL_GPL(sec_reg_read); 87 88 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 89 { 90 return regmap_bulk_read(sec_pmic->regmap, reg, buf, count); 91 } 92 EXPORT_SYMBOL_GPL(sec_bulk_read); 93 94 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value) 95 { 96 return regmap_write(sec_pmic->regmap, reg, value); 97 } 98 EXPORT_SYMBOL_GPL(sec_reg_write); 99 100 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 101 { 102 return regmap_raw_write(sec_pmic->regmap, reg, buf, count); 103 } 104 EXPORT_SYMBOL_GPL(sec_bulk_write); 105 106 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask) 107 { 108 return regmap_update_bits(sec_pmic->regmap, reg, mask, val); 109 } 110 EXPORT_SYMBOL_GPL(sec_reg_update); 111 112 static bool s2mps11_volatile(struct device *dev, unsigned int reg) 113 { 114 switch (reg) { 115 case S2MPS11_REG_INT1M: 116 case S2MPS11_REG_INT2M: 117 case S2MPS11_REG_INT3M: 118 return false; 119 default: 120 return true; 121 } 122 } 123 124 static bool s5m8763_volatile(struct device *dev, unsigned int reg) 125 { 126 switch (reg) { 127 case S5M8763_REG_IRQM1: 128 case S5M8763_REG_IRQM2: 129 case S5M8763_REG_IRQM3: 130 case S5M8763_REG_IRQM4: 131 return false; 132 default: 133 return true; 134 } 135 } 136 137 static struct regmap_config sec_regmap_config = { 138 .reg_bits = 8, 139 .val_bits = 8, 140 }; 141 142 static struct regmap_config s2mps11_regmap_config = { 143 .reg_bits = 8, 144 .val_bits = 8, 145 146 .max_register = S2MPS11_REG_L38CTRL, 147 .volatile_reg = s2mps11_volatile, 148 .cache_type = REGCACHE_FLAT, 149 }; 150 151 static struct regmap_config s5m8763_regmap_config = { 152 .reg_bits = 8, 153 .val_bits = 8, 154 155 .max_register = S5M8763_REG_LBCNFG2, 156 .volatile_reg = s5m8763_volatile, 157 .cache_type = REGCACHE_FLAT, 158 }; 159 160 static struct regmap_config s5m8767_regmap_config = { 161 .reg_bits = 8, 162 .val_bits = 8, 163 164 .max_register = S5M8767_REG_LDO28CTRL, 165 .volatile_reg = s2mps11_volatile, 166 .cache_type = REGCACHE_FLAT, 167 }; 168 169 #ifdef CONFIG_OF 170 /* 171 * Only the common platform data elements for s5m8767 are parsed here from the 172 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and 173 * others have to parse their own platform data elements from device tree. 174 * 175 * The s5m8767 platform data structure is instantiated here and the drivers for 176 * the sub-modules need not instantiate another instance while parsing their 177 * platform data. 178 */ 179 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 180 struct device *dev) 181 { 182 struct sec_platform_data *pd; 183 184 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 185 if (!pd) { 186 dev_err(dev, "could not allocate memory for pdata\n"); 187 return ERR_PTR(-ENOMEM); 188 } 189 190 /* 191 * ToDo: the 'wakeup' member in the platform data is more of a linux 192 * specfic information. Hence, there is no binding for that yet and 193 * not parsed here. 194 */ 195 196 return pd; 197 } 198 #else 199 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 200 struct device *dev) 201 { 202 return 0; 203 } 204 #endif 205 206 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c, 207 const struct i2c_device_id *id) 208 { 209 #ifdef CONFIG_OF 210 if (i2c->dev.of_node) { 211 const struct of_device_id *match; 212 match = of_match_node(sec_dt_match, i2c->dev.of_node); 213 return (int)match->data; 214 } 215 #endif 216 return (int)id->driver_data; 217 } 218 219 static int sec_pmic_probe(struct i2c_client *i2c, 220 const struct i2c_device_id *id) 221 { 222 struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev); 223 const struct regmap_config *regmap; 224 struct sec_pmic_dev *sec_pmic; 225 int ret; 226 227 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), 228 GFP_KERNEL); 229 if (sec_pmic == NULL) 230 return -ENOMEM; 231 232 i2c_set_clientdata(i2c, sec_pmic); 233 sec_pmic->dev = &i2c->dev; 234 sec_pmic->i2c = i2c; 235 sec_pmic->irq = i2c->irq; 236 sec_pmic->type = sec_i2c_get_driver_data(i2c, id); 237 238 if (sec_pmic->dev->of_node) { 239 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); 240 if (IS_ERR(pdata)) { 241 ret = PTR_ERR(pdata); 242 return ret; 243 } 244 pdata->device_type = sec_pmic->type; 245 } 246 if (pdata) { 247 sec_pmic->device_type = pdata->device_type; 248 sec_pmic->ono = pdata->ono; 249 sec_pmic->irq_base = pdata->irq_base; 250 sec_pmic->wakeup = pdata->wakeup; 251 sec_pmic->pdata = pdata; 252 } 253 254 switch (sec_pmic->device_type) { 255 case S2MPS11X: 256 regmap = &s2mps11_regmap_config; 257 break; 258 case S5M8763X: 259 regmap = &s5m8763_regmap_config; 260 break; 261 case S5M8767X: 262 regmap = &s5m8767_regmap_config; 263 break; 264 default: 265 regmap = &sec_regmap_config; 266 break; 267 } 268 269 sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap); 270 if (IS_ERR(sec_pmic->regmap)) { 271 ret = PTR_ERR(sec_pmic->regmap); 272 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 273 ret); 274 return ret; 275 } 276 277 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); 278 i2c_set_clientdata(sec_pmic->rtc, sec_pmic); 279 280 if (pdata && pdata->cfg_pmic_irq) 281 pdata->cfg_pmic_irq(); 282 283 sec_irq_init(sec_pmic); 284 285 pm_runtime_set_active(sec_pmic->dev); 286 287 switch (sec_pmic->device_type) { 288 case S5M8751X: 289 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, 290 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); 291 break; 292 case S5M8763X: 293 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, 294 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); 295 break; 296 case S5M8767X: 297 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, 298 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); 299 break; 300 case S2MPS11X: 301 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, 302 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); 303 break; 304 default: 305 /* If this happens the probe function is problem */ 306 BUG(); 307 } 308 309 if (ret) 310 goto err; 311 312 return ret; 313 314 err: 315 sec_irq_exit(sec_pmic); 316 i2c_unregister_device(sec_pmic->rtc); 317 return ret; 318 } 319 320 static int sec_pmic_remove(struct i2c_client *i2c) 321 { 322 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 323 324 mfd_remove_devices(sec_pmic->dev); 325 sec_irq_exit(sec_pmic); 326 i2c_unregister_device(sec_pmic->rtc); 327 return 0; 328 } 329 330 static const struct i2c_device_id sec_pmic_id[] = { 331 { "sec_pmic", 0 }, 332 { } 333 }; 334 MODULE_DEVICE_TABLE(i2c, sec_pmic_id); 335 336 static struct i2c_driver sec_pmic_driver = { 337 .driver = { 338 .name = "sec_pmic", 339 .owner = THIS_MODULE, 340 .of_match_table = of_match_ptr(sec_dt_match), 341 }, 342 .probe = sec_pmic_probe, 343 .remove = sec_pmic_remove, 344 .id_table = sec_pmic_id, 345 }; 346 347 static int __init sec_pmic_init(void) 348 { 349 return i2c_add_driver(&sec_pmic_driver); 350 } 351 352 subsys_initcall(sec_pmic_init); 353 354 static void __exit sec_pmic_exit(void) 355 { 356 i2c_del_driver(&sec_pmic_driver); 357 } 358 module_exit(sec_pmic_exit); 359 360 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 361 MODULE_DESCRIPTION("Core support for the S5M MFD"); 362 MODULE_LICENSE("GPL"); 363