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 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 71 | static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 72 | struct tps65910_board *pmic_pdata) |
| 73 | { |
| 74 | struct device *dev = NULL; |
| 75 | int ret = 0; |
| 76 | |
| 77 | dev = tps65910->dev; |
| 78 | |
| 79 | if (!pmic_pdata->en_dev_slp) |
| 80 | return 0; |
| 81 | |
| 82 | /* enabling SLEEP device state */ |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 83 | ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 84 | DEVCTRL_DEV_SLP_MASK); |
| 85 | if (ret < 0) { |
| 86 | dev_err(dev, "set dev_slp failed: %d\n", ret); |
| 87 | goto err_sleep_init; |
| 88 | } |
| 89 | |
| 90 | /* Return if there is no sleep keepon data. */ |
| 91 | if (!pmic_pdata->slp_keepon) |
| 92 | return 0; |
| 93 | |
| 94 | if (pmic_pdata->slp_keepon->therm_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 95 | ret = tps65910_reg_set_bits(tps65910, |
| 96 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 97 | SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); |
| 98 | if (ret < 0) { |
| 99 | dev_err(dev, "set therm_keepon failed: %d\n", ret); |
| 100 | goto disable_dev_slp; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | if (pmic_pdata->slp_keepon->clkout32k_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 105 | ret = tps65910_reg_set_bits(tps65910, |
| 106 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 107 | SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); |
| 108 | if (ret < 0) { |
| 109 | dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); |
| 110 | goto disable_dev_slp; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | if (pmic_pdata->slp_keepon->i2chs_keepon) { |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 115 | ret = tps65910_reg_set_bits(tps65910, |
| 116 | TPS65910_SLEEP_KEEP_RES_ON, |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 117 | SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); |
| 118 | if (ret < 0) { |
| 119 | dev_err(dev, "set i2chs_keepon failed: %d\n", ret); |
| 120 | goto disable_dev_slp; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | return 0; |
| 125 | |
| 126 | disable_dev_slp: |
Rhyland Klein | 3f7e827 | 2012-05-08 11:42:38 -0700 | [diff] [blame] | 127 | tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, |
| 128 | DEVCTRL_DEV_SLP_MASK); |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 129 | |
| 130 | err_sleep_init: |
| 131 | return ret; |
| 132 | } |
| 133 | |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 134 | #ifdef CONFIG_OF |
| 135 | static struct of_device_id tps65910_of_match[] = { |
| 136 | { .compatible = "ti,tps65910", .data = (void *)TPS65910}, |
| 137 | { .compatible = "ti,tps65911", .data = (void *)TPS65911}, |
| 138 | { }, |
| 139 | }; |
| 140 | MODULE_DEVICE_TABLE(of, tps65910_of_match); |
| 141 | |
| 142 | static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, |
| 143 | int *chip_id) |
| 144 | { |
| 145 | struct device_node *np = client->dev.of_node; |
| 146 | struct tps65910_board *board_info; |
| 147 | unsigned int prop; |
| 148 | const struct of_device_id *match; |
| 149 | unsigned int prop_array[TPS6591X_MAX_NUM_GPIO]; |
| 150 | int ret = 0; |
| 151 | int idx; |
| 152 | |
| 153 | match = of_match_device(tps65910_of_match, &client->dev); |
| 154 | if (!match) { |
| 155 | dev_err(&client->dev, "Failed to find matching dt id\n"); |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | *chip_id = (int)match->data; |
| 160 | |
| 161 | board_info = devm_kzalloc(&client->dev, sizeof(*board_info), |
| 162 | GFP_KERNEL); |
| 163 | if (!board_info) { |
| 164 | dev_err(&client->dev, "Failed to allocate pdata\n"); |
| 165 | return NULL; |
| 166 | } |
| 167 | |
| 168 | ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); |
| 169 | if (!ret) |
| 170 | board_info->vmbch_threshold = prop; |
| 171 | else if (*chip_id == TPS65911) |
| 172 | dev_warn(&client->dev, "VMBCH-Threshold not specified"); |
| 173 | |
| 174 | ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); |
| 175 | if (!ret) |
| 176 | board_info->vmbch2_threshold = prop; |
| 177 | else if (*chip_id == TPS65911) |
| 178 | dev_warn(&client->dev, "VMBCH2-Threshold not specified"); |
| 179 | |
| 180 | ret = of_property_read_u32_array(np, "ti,en-gpio-sleep", |
| 181 | prop_array, TPS6591X_MAX_NUM_GPIO); |
| 182 | if (!ret) |
| 183 | for (idx = 0; idx < ARRAY_SIZE(prop_array); idx++) |
| 184 | board_info->en_gpio_sleep[idx] = (prop_array[idx] != 0); |
| 185 | else if (ret != -EINVAL) { |
| 186 | dev_err(&client->dev, |
| 187 | "error reading property ti,en-gpio-sleep: %d\n.", ret); |
| 188 | return NULL; |
| 189 | } |
| 190 | |
| 191 | |
| 192 | board_info->irq = client->irq; |
| 193 | board_info->irq_base = -1; |
| 194 | board_info->gpio_base = -1; |
| 195 | |
| 196 | return board_info; |
| 197 | } |
| 198 | #else |
Samuel Ortiz | 7f65f74 | 2012-05-11 15:10:28 +0200 | [diff] [blame^] | 199 | static inline |
| 200 | struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, |
| 201 | int *chip_id) |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 202 | { |
| 203 | return NULL; |
| 204 | } |
| 205 | #endif |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 206 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 207 | static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, |
| 208 | const struct i2c_device_id *id) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 209 | { |
| 210 | struct tps65910 *tps65910; |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 211 | struct tps65910_board *pmic_plat_data; |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 212 | struct tps65910_platform_data *init_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 213 | int ret = 0; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 214 | int chip_id = id->driver_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 215 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 216 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 217 | |
| 218 | if (!pmic_plat_data && i2c->dev.of_node) |
| 219 | pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); |
| 220 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 221 | if (!pmic_plat_data) |
| 222 | return -EINVAL; |
| 223 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 224 | init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 225 | if (init_data == NULL) |
| 226 | return -ENOMEM; |
| 227 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 228 | tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); |
| 229 | if (tps65910 == NULL) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 230 | return -ENOMEM; |
| 231 | |
| 232 | i2c_set_clientdata(i2c, tps65910); |
| 233 | tps65910->dev = &i2c->dev; |
| 234 | tps65910->i2c_client = i2c; |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 235 | tps65910->id = chip_id; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 236 | mutex_init(&tps65910->io_mutex); |
| 237 | |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 238 | tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 239 | if (IS_ERR(tps65910->regmap)) { |
| 240 | ret = PTR_ERR(tps65910->regmap); |
| 241 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 242 | return ret; |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame] | 243 | } |
| 244 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 245 | ret = mfd_add_devices(tps65910->dev, -1, |
| 246 | tps65910s, ARRAY_SIZE(tps65910s), |
| 247 | NULL, 0); |
Laxman Dewangan | 63fe7de | 2012-05-11 12:36:57 +0200 | [diff] [blame] | 248 | if (ret < 0) { |
| 249 | dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); |
| 250 | return ret; |
| 251 | } |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 252 | |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 253 | init_data->irq = pmic_plat_data->irq; |
Laxman Dewangan | 1773140 | 2012-01-18 20:19:16 +0530 | [diff] [blame] | 254 | init_data->irq_base = pmic_plat_data->irq_base; |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 255 | |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 256 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 257 | |
Laxman Dewangan | 201cf05 | 2012-04-18 12:13:51 +0200 | [diff] [blame] | 258 | tps65910_sleepinit(tps65910, pmic_plat_data); |
| 259 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 260 | return ret; |
| 261 | } |
| 262 | |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 263 | static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 264 | { |
| 265 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); |
| 266 | |
Mark Brown | ec2328c | 2011-06-20 11:47:55 +0100 | [diff] [blame] | 267 | tps65910_irq_exit(tps65910); |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 268 | mfd_remove_devices(tps65910->dev); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static const struct i2c_device_id tps65910_i2c_id[] = { |
Jorge Eduardo Candelaria | 7955705 | 2011-05-16 18:34:59 -0500 | [diff] [blame] | 274 | { "tps65910", TPS65910 }, |
| 275 | { "tps65911", TPS65911 }, |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 276 | { } |
| 277 | }; |
| 278 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); |
| 279 | |
| 280 | |
| 281 | static struct i2c_driver tps65910_i2c_driver = { |
| 282 | .driver = { |
| 283 | .name = "tps65910", |
| 284 | .owner = THIS_MODULE, |
Rhyland Klein | cd4209c | 2012-05-11 11:36:26 +0200 | [diff] [blame] | 285 | .of_match_table = of_match_ptr(tps65910_of_match), |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 286 | }, |
| 287 | .probe = tps65910_i2c_probe, |
Mark Brown | 63745d4 | 2012-05-07 10:03:19 +0100 | [diff] [blame] | 288 | .remove = __devexit_p(tps65910_i2c_remove), |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 289 | .id_table = tps65910_i2c_id, |
| 290 | }; |
| 291 | |
| 292 | static int __init tps65910_i2c_init(void) |
| 293 | { |
| 294 | return i2c_add_driver(&tps65910_i2c_driver); |
| 295 | } |
| 296 | /* init early so consumer devices can complete system boot */ |
| 297 | subsys_initcall(tps65910_i2c_init); |
| 298 | |
| 299 | static void __exit tps65910_i2c_exit(void) |
| 300 | { |
| 301 | i2c_del_driver(&tps65910_i2c_driver); |
| 302 | } |
| 303 | module_exit(tps65910_i2c_exit); |
| 304 | |
| 305 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); |
| 306 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); |
| 307 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); |
| 308 | MODULE_LICENSE("GPL"); |