Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 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> |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 19 | #include <linux/err.h> |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 20 | #include <linux/slab.h> |
| 21 | #include <linux/i2c.h> |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 22 | #include <linux/mfd/core.h> |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 23 | #include <linux/regmap.h> |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 24 | #include <linux/mfd/tps65910.h> |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 25 | #include <linux/of_device.h> |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 26 | |
| 27 | static struct mfd_cell tps65910s[] = { |
| 28 | { |
Laxman Dewangan | 32df986 | 2012-05-11 15:07:44 +0200 | [diff] [blame] | 29 | .name = "tps65910-gpio", |
| 30 | }, |
| 31 | { |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 32 | .name = "tps65910-pmic", |
| 33 | }, |
| 34 | { |
| 35 | .name = "tps65910-rtc", |
| 36 | }, |
| 37 | { |
| 38 | .name = "tps65910-power", |
| 39 | }, |
| 40 | }; |
| 41 | |
| 42 | |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 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 | |
Laxman Dewangan | 39ecb03 | 2012-03-07 18:46:05 +0530 | [diff] [blame] | 63 | static const struct regmap_config tps65910_regmap_config = { |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 64 | .reg_bits = 8, |
| 65 | .val_bits = 8, |
| 66 | .volatile_reg = is_volatile_reg, |
Laxman Dewangan | 3bf6bf9 | 2012-05-09 18:40:54 +0530 | [diff] [blame] | 67 | .max_register = TPS65910_MAX_REGISTER - 1, |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 68 | .cache_type = REGCACHE_RBTREE, |
| 69 | }; |
| 70 | |
Johan Hovold | 712db99 | 2012-06-28 12:20:21 +0200 | [diff] [blame^] | 71 | static int __devinit tps65910_misc_init(struct tps65910 *tps65910, |
| 72 | struct tps65910_board *pmic_pdata) |
| 73 | { |
| 74 | struct device *dev = tps65910->dev; |
| 75 | int ret; |
| 76 | |
| 77 | if (pmic_pdata->en_ck32k_xtal) { |
| 78 | ret = tps65910_reg_clear_bits(tps65910, |
| 79 | TPS65910_DEVCTRL, |
| 80 | DEVCTRL_CK32K_CTRL_MASK); |
| 81 | if (ret < 0) { |
| 82 | dev_err(dev, "clear ck32k_ctrl failed: %d\n", ret); |
| 83 | return ret; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 90 | static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 91 | struct tps65910_board *pmic_pdata) |
| 92 | { |
| 93 | struct device *dev = NULL; |
| 94 | int ret = 0; |
| 95 | |
| 96 | dev = tps65910->dev; |
| 97 | |
| 98 | if (!pmic_pdata->en_dev_slp) |
| 99 | return 0; |
| 100 | |
| 101 | /* enabling SLEEP device state */ |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 102 | ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 103 | DEVCTRL_DEV_SLP_MASK); |
| 104 | if (ret < 0) { |
| 105 | dev_err(dev, "set dev_slp failed: %d\n", ret); |
| 106 | goto err_sleep_init; |
| 107 | } |
| 108 | |
| 109 | /* Return if there is no sleep keepon data. */ |
| 110 | if (!pmic_pdata->slp_keepon) |
| 111 | return 0; |
| 112 | |
| 113 | if (pmic_pdata->slp_keepon->therm_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 114 | ret = tps65910_reg_set_bits(tps65910, |
| 115 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 116 | SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); |
| 117 | if (ret < 0) { |
| 118 | dev_err(dev, "set therm_keepon failed: %d\n", ret); |
| 119 | goto disable_dev_slp; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | if (pmic_pdata->slp_keepon->clkout32k_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 124 | ret = tps65910_reg_set_bits(tps65910, |
| 125 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 126 | SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); |
| 127 | if (ret < 0) { |
| 128 | dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); |
| 129 | goto disable_dev_slp; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | if (pmic_pdata->slp_keepon->i2chs_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 134 | ret = tps65910_reg_set_bits(tps65910, |
| 135 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 136 | SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); |
| 137 | if (ret < 0) { |
| 138 | dev_err(dev, "set i2chs_keepon failed: %d\n", ret); |
| 139 | goto disable_dev_slp; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | return 0; |
| 144 | |
| 145 | disable_dev_slp: |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 146 | tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, |
| 147 | DEVCTRL_DEV_SLP_MASK); |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 148 | |
| 149 | err_sleep_init: |
| 150 | return ret; |
| 151 | } |
| 152 | |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 153 | #ifdef CONFIG_OF |
| 154 | static struct of_device_id tps65910_of_match[] = { |
| 155 | { .compatible = "ti,tps65910", .data = (void *)TPS65910}, |
| 156 | { .compatible = "ti,tps65911", .data = (void *)TPS65911}, |
| 157 | { }, |
| 158 | }; |
| 159 | MODULE_DEVICE_TABLE(of, tps65910_of_match); |
| 160 | |
| 161 | static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, |
| 162 | int *chip_id) |
| 163 | { |
| 164 | struct device_node *np = client->dev.of_node; |
| 165 | struct tps65910_board *board_info; |
| 166 | unsigned int prop; |
| 167 | const struct of_device_id *match; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 168 | int ret = 0; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 169 | |
| 170 | match = of_match_device(tps65910_of_match, &client->dev); |
| 171 | if (!match) { |
| 172 | dev_err(&client->dev, "Failed to find matching dt id\n"); |
| 173 | return NULL; |
| 174 | } |
| 175 | |
| 176 | *chip_id = (int)match->data; |
| 177 | |
| 178 | board_info = devm_kzalloc(&client->dev, sizeof(*board_info), |
| 179 | GFP_KERNEL); |
| 180 | if (!board_info) { |
| 181 | dev_err(&client->dev, "Failed to allocate pdata\n"); |
| 182 | return NULL; |
| 183 | } |
| 184 | |
| 185 | ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); |
| 186 | if (!ret) |
| 187 | board_info->vmbch_threshold = prop; |
| 188 | else if (*chip_id == TPS65911) |
| 189 | dev_warn(&client->dev, "VMBCH-Threshold not specified"); |
| 190 | |
| 191 | ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); |
| 192 | if (!ret) |
| 193 | board_info->vmbch2_threshold = prop; |
| 194 | else if (*chip_id == TPS65911) |
| 195 | dev_warn(&client->dev, "VMBCH2-Threshold not specified"); |
| 196 | |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 197 | board_info->irq = client->irq; |
| 198 | board_info->irq_base = -1; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 199 | |
| 200 | return board_info; |
| 201 | } |
| 202 | #else |
Samuel Ortiz | 7f65f74 | 2012-05-11 15:10:28 +0200 | [diff] [blame] | 203 | static inline |
| 204 | struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, |
| 205 | int *chip_id) |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 206 | { |
| 207 | return NULL; |
| 208 | } |
| 209 | #endif |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 210 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 211 | static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, |
| 212 | const struct i2c_device_id *id) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 213 | { |
| 214 | struct tps65910 *tps65910; |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 215 | struct tps65910_board *pmic_plat_data; |
Laxman Dewangan | cb8d865 | 2012-05-19 02:01:41 +0530 | [diff] [blame] | 216 | struct tps65910_board *of_pmic_plat_data = NULL; |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 217 | struct tps65910_platform_data *init_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 218 | int ret = 0; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 219 | int chip_id = id->driver_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 220 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 221 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 222 | |
Laxman Dewangan | cb8d865 | 2012-05-19 02:01:41 +0530 | [diff] [blame] | 223 | if (!pmic_plat_data && i2c->dev.of_node) { |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 224 | pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); |
Laxman Dewangan | cb8d865 | 2012-05-19 02:01:41 +0530 | [diff] [blame] | 225 | of_pmic_plat_data = pmic_plat_data; |
| 226 | } |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 227 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 228 | if (!pmic_plat_data) |
| 229 | return -EINVAL; |
| 230 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 231 | init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 232 | if (init_data == NULL) |
| 233 | return -ENOMEM; |
| 234 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 235 | tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); |
| 236 | if (tps65910 == NULL) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 237 | return -ENOMEM; |
| 238 | |
Laxman Dewangan | cb8d865 | 2012-05-19 02:01:41 +0530 | [diff] [blame] | 239 | tps65910->of_plat_data = of_pmic_plat_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 240 | i2c_set_clientdata(i2c, tps65910); |
| 241 | tps65910->dev = &i2c->dev; |
| 242 | tps65910->i2c_client = i2c; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 243 | tps65910->id = chip_id; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 244 | mutex_init(&tps65910->io_mutex); |
| 245 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 246 | tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 247 | if (IS_ERR(tps65910->regmap)) { |
| 248 | ret = PTR_ERR(tps65910->regmap); |
| 249 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 250 | return ret; |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 251 | } |
| 252 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 253 | ret = mfd_add_devices(tps65910->dev, -1, |
| 254 | tps65910s, ARRAY_SIZE(tps65910s), |
| 255 | NULL, 0); |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 256 | if (ret < 0) { |
| 257 | dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); |
| 258 | return ret; |
| 259 | } |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 260 | |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 261 | init_data->irq = pmic_plat_data->irq; |
Laxman Dewangan | 1773140 | 2012-01-18 20:19:16 +0530 | [diff] [blame] | 262 | init_data->irq_base = pmic_plat_data->irq_base; |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 263 | |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 264 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
Johan Hovold | 712db99 | 2012-06-28 12:20:21 +0200 | [diff] [blame^] | 265 | tps65910_misc_init(tps65910, pmic_plat_data); |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 266 | tps65910_sleepinit(tps65910, pmic_plat_data); |
| 267 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 268 | return ret; |
| 269 | } |
| 270 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 271 | static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 272 | { |
| 273 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); |
| 274 | |
Mark Brown | ec2328c | 2011-06-20 11:47:55 +0100 | [diff] [blame] | 275 | tps65910_irq_exit(tps65910); |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 276 | mfd_remove_devices(tps65910->dev); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | static const struct i2c_device_id tps65910_i2c_id[] = { |
Jorge Eduardo Candelaria | 7955705 | 2011-05-16 18:34:59 -0500 | [diff] [blame] | 282 | { "tps65910", TPS65910 }, |
| 283 | { "tps65911", TPS65911 }, |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 284 | { } |
| 285 | }; |
| 286 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); |
| 287 | |
| 288 | |
| 289 | static struct i2c_driver tps65910_i2c_driver = { |
| 290 | .driver = { |
| 291 | .name = "tps65910", |
| 292 | .owner = THIS_MODULE, |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 293 | .of_match_table = of_match_ptr(tps65910_of_match), |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 294 | }, |
| 295 | .probe = tps65910_i2c_probe, |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 296 | .remove = __devexit_p(tps65910_i2c_remove), |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 297 | .id_table = tps65910_i2c_id, |
| 298 | }; |
| 299 | |
| 300 | static int __init tps65910_i2c_init(void) |
| 301 | { |
| 302 | return i2c_add_driver(&tps65910_i2c_driver); |
| 303 | } |
| 304 | /* init early so consumer devices can complete system boot */ |
| 305 | subsys_initcall(tps65910_i2c_init); |
| 306 | |
| 307 | static void __exit tps65910_i2c_exit(void) |
| 308 | { |
| 309 | i2c_del_driver(&tps65910_i2c_driver); |
| 310 | } |
| 311 | module_exit(tps65910_i2c_exit); |
| 312 | |
| 313 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); |
| 314 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); |
| 315 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); |
| 316 | MODULE_LICENSE("GPL"); |