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