1 /* 2 * tps65910.c -- TI TPS6591x 3 * 4 * Copyright 2010 Texas Instruments Inc. 5 * 6 * Author: Graeme Gregory <gg@slimlogic.co.uk> 7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <linux/init.h> 19 #include <linux/err.h> 20 #include <linux/slab.h> 21 #include <linux/i2c.h> 22 #include <linux/mfd/core.h> 23 #include <linux/regmap.h> 24 #include <linux/mfd/tps65910.h> 25 #include <linux/of_device.h> 26 27 static struct mfd_cell tps65910s[] = { 28 { 29 .name = "tps65910-gpio", 30 }, 31 { 32 .name = "tps65910-pmic", 33 }, 34 { 35 .name = "tps65910-rtc", 36 }, 37 { 38 .name = "tps65910-power", 39 }, 40 }; 41 42 43 static bool is_volatile_reg(struct device *dev, unsigned int reg) 44 { 45 struct tps65910 *tps65910 = dev_get_drvdata(dev); 46 47 /* 48 * Caching all regulator registers. 49 * All regualator register address range is same for 50 * TPS65910 and TPS65911 51 */ 52 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { 53 /* Check for non-existing register */ 54 if (tps65910_chip_id(tps65910) == TPS65910) 55 if ((reg == TPS65911_VDDCTRL_OP) || 56 (reg == TPS65911_VDDCTRL_SR)) 57 return true; 58 return false; 59 } 60 return true; 61 } 62 63 static const struct regmap_config tps65910_regmap_config = { 64 .reg_bits = 8, 65 .val_bits = 8, 66 .volatile_reg = is_volatile_reg, 67 .max_register = TPS65910_MAX_REGISTER - 1, 68 .cache_type = REGCACHE_RBTREE, 69 }; 70 71 static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910, 72 struct tps65910_board *pmic_pdata) 73 { 74 int ret; 75 76 if (!pmic_pdata->en_ck32k_xtal) 77 return 0; 78 79 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, 80 DEVCTRL_CK32K_CTRL_MASK); 81 if (ret < 0) { 82 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret); 83 return ret; 84 } 85 86 return 0; 87 } 88 89 static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, 90 struct tps65910_board *pmic_pdata) 91 { 92 struct device *dev = NULL; 93 int ret = 0; 94 95 dev = tps65910->dev; 96 97 if (!pmic_pdata->en_dev_slp) 98 return 0; 99 100 /* enabling SLEEP device state */ 101 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, 102 DEVCTRL_DEV_SLP_MASK); 103 if (ret < 0) { 104 dev_err(dev, "set dev_slp failed: %d\n", ret); 105 goto err_sleep_init; 106 } 107 108 /* Return if there is no sleep keepon data. */ 109 if (!pmic_pdata->slp_keepon) 110 return 0; 111 112 if (pmic_pdata->slp_keepon->therm_keepon) { 113 ret = tps65910_reg_set_bits(tps65910, 114 TPS65910_SLEEP_KEEP_RES_ON, 115 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); 116 if (ret < 0) { 117 dev_err(dev, "set therm_keepon failed: %d\n", ret); 118 goto disable_dev_slp; 119 } 120 } 121 122 if (pmic_pdata->slp_keepon->clkout32k_keepon) { 123 ret = tps65910_reg_set_bits(tps65910, 124 TPS65910_SLEEP_KEEP_RES_ON, 125 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); 126 if (ret < 0) { 127 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); 128 goto disable_dev_slp; 129 } 130 } 131 132 if (pmic_pdata->slp_keepon->i2chs_keepon) { 133 ret = tps65910_reg_set_bits(tps65910, 134 TPS65910_SLEEP_KEEP_RES_ON, 135 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); 136 if (ret < 0) { 137 dev_err(dev, "set i2chs_keepon failed: %d\n", ret); 138 goto disable_dev_slp; 139 } 140 } 141 142 return 0; 143 144 disable_dev_slp: 145 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, 146 DEVCTRL_DEV_SLP_MASK); 147 148 err_sleep_init: 149 return ret; 150 } 151 152 #ifdef CONFIG_OF 153 static struct of_device_id tps65910_of_match[] = { 154 { .compatible = "ti,tps65910", .data = (void *)TPS65910}, 155 { .compatible = "ti,tps65911", .data = (void *)TPS65911}, 156 { }, 157 }; 158 MODULE_DEVICE_TABLE(of, tps65910_of_match); 159 160 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 161 int *chip_id) 162 { 163 struct device_node *np = client->dev.of_node; 164 struct tps65910_board *board_info; 165 unsigned int prop; 166 const struct of_device_id *match; 167 int ret = 0; 168 169 match = of_match_device(tps65910_of_match, &client->dev); 170 if (!match) { 171 dev_err(&client->dev, "Failed to find matching dt id\n"); 172 return NULL; 173 } 174 175 *chip_id = (int)match->data; 176 177 board_info = devm_kzalloc(&client->dev, sizeof(*board_info), 178 GFP_KERNEL); 179 if (!board_info) { 180 dev_err(&client->dev, "Failed to allocate pdata\n"); 181 return NULL; 182 } 183 184 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); 185 if (!ret) 186 board_info->vmbch_threshold = prop; 187 else if (*chip_id == TPS65911) 188 dev_warn(&client->dev, "VMBCH-Threshold not specified"); 189 190 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); 191 if (!ret) 192 board_info->vmbch2_threshold = prop; 193 else if (*chip_id == TPS65911) 194 dev_warn(&client->dev, "VMBCH2-Threshold not specified"); 195 196 prop = of_property_read_bool(np, "ti,en-ck32k-xtal"); 197 board_info->en_ck32k_xtal = prop; 198 199 board_info->irq = client->irq; 200 board_info->irq_base = -1; 201 202 return board_info; 203 } 204 #else 205 static inline 206 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 207 int *chip_id) 208 { 209 return NULL; 210 } 211 #endif 212 213 static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, 214 const struct i2c_device_id *id) 215 { 216 struct tps65910 *tps65910; 217 struct tps65910_board *pmic_plat_data; 218 struct tps65910_board *of_pmic_plat_data = NULL; 219 struct tps65910_platform_data *init_data; 220 int ret = 0; 221 int chip_id = id->driver_data; 222 223 pmic_plat_data = dev_get_platdata(&i2c->dev); 224 225 if (!pmic_plat_data && i2c->dev.of_node) { 226 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); 227 of_pmic_plat_data = pmic_plat_data; 228 } 229 230 if (!pmic_plat_data) 231 return -EINVAL; 232 233 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); 234 if (init_data == NULL) 235 return -ENOMEM; 236 237 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); 238 if (tps65910 == NULL) 239 return -ENOMEM; 240 241 tps65910->of_plat_data = of_pmic_plat_data; 242 i2c_set_clientdata(i2c, tps65910); 243 tps65910->dev = &i2c->dev; 244 tps65910->i2c_client = i2c; 245 tps65910->id = chip_id; 246 mutex_init(&tps65910->io_mutex); 247 248 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); 249 if (IS_ERR(tps65910->regmap)) { 250 ret = PTR_ERR(tps65910->regmap); 251 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); 252 return ret; 253 } 254 255 ret = mfd_add_devices(tps65910->dev, -1, 256 tps65910s, ARRAY_SIZE(tps65910s), 257 NULL, 0); 258 if (ret < 0) { 259 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); 260 return ret; 261 } 262 263 init_data->irq = pmic_plat_data->irq; 264 init_data->irq_base = pmic_plat_data->irq_base; 265 266 tps65910_irq_init(tps65910, init_data->irq, init_data); 267 tps65910_ck32k_init(tps65910, pmic_plat_data); 268 tps65910_sleepinit(tps65910, pmic_plat_data); 269 270 return ret; 271 } 272 273 static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) 274 { 275 struct tps65910 *tps65910 = i2c_get_clientdata(i2c); 276 277 tps65910_irq_exit(tps65910); 278 mfd_remove_devices(tps65910->dev); 279 280 return 0; 281 } 282 283 static const struct i2c_device_id tps65910_i2c_id[] = { 284 { "tps65910", TPS65910 }, 285 { "tps65911", TPS65911 }, 286 { } 287 }; 288 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); 289 290 291 static struct i2c_driver tps65910_i2c_driver = { 292 .driver = { 293 .name = "tps65910", 294 .owner = THIS_MODULE, 295 .of_match_table = of_match_ptr(tps65910_of_match), 296 }, 297 .probe = tps65910_i2c_probe, 298 .remove = __devexit_p(tps65910_i2c_remove), 299 .id_table = tps65910_i2c_id, 300 }; 301 302 static int __init tps65910_i2c_init(void) 303 { 304 return i2c_add_driver(&tps65910_i2c_driver); 305 } 306 /* init early so consumer devices can complete system boot */ 307 subsys_initcall(tps65910_i2c_init); 308 309 static void __exit tps65910_i2c_exit(void) 310 { 311 i2c_del_driver(&tps65910_i2c_driver); 312 } 313 module_exit(tps65910_i2c_exit); 314 315 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); 316 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); 317 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); 318 MODULE_LICENSE("GPL"); 319