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> |
| 22 | #include <linux/gpio.h> |
| 23 | #include <linux/mfd/core.h> |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 24 | #include <linux/regmap.h> |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 25 | #include <linux/mfd/tps65910.h> |
| 26 | |
| 27 | static struct mfd_cell tps65910s[] = { |
| 28 | { |
| 29 | .name = "tps65910-pmic", |
| 30 | }, |
| 31 | { |
| 32 | .name = "tps65910-rtc", |
| 33 | }, |
| 34 | { |
| 35 | .name = "tps65910-power", |
| 36 | }, |
| 37 | }; |
| 38 | |
| 39 | |
| 40 | static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg, |
| 41 | int bytes, void *dest) |
| 42 | { |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 43 | return regmap_bulk_read(tps65910->regmap, reg, dest, bytes); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg, |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 47 | int bytes, void *src) |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 48 | { |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 49 | return regmap_bulk_write(tps65910->regmap, reg, src, bytes); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 50 | } |
| 51 | |
| 52 | int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask) |
| 53 | { |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 54 | return regmap_update_bits(tps65910->regmap, reg, mask, mask); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 55 | } |
| 56 | EXPORT_SYMBOL_GPL(tps65910_set_bits); |
| 57 | |
| 58 | int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask) |
| 59 | { |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 60 | return regmap_update_bits(tps65910->regmap, reg, mask, 0); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 61 | } |
| 62 | EXPORT_SYMBOL_GPL(tps65910_clear_bits); |
| 63 | |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 64 | static bool is_volatile_reg(struct device *dev, unsigned int reg) |
| 65 | { |
| 66 | struct tps65910 *tps65910 = dev_get_drvdata(dev); |
| 67 | |
| 68 | /* |
| 69 | * Caching all regulator registers. |
| 70 | * All regualator register address range is same for |
| 71 | * TPS65910 and TPS65911 |
| 72 | */ |
| 73 | if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { |
| 74 | /* Check for non-existing register */ |
| 75 | if (tps65910_chip_id(tps65910) == TPS65910) |
| 76 | if ((reg == TPS65911_VDDCTRL_OP) || |
| 77 | (reg == TPS65911_VDDCTRL_SR)) |
| 78 | return true; |
| 79 | return false; |
| 80 | } |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | static const struct regmap_config rc5t583_regmap_config = { |
| 85 | .reg_bits = 8, |
| 86 | .val_bits = 8, |
| 87 | .volatile_reg = is_volatile_reg, |
| 88 | .max_register = TPS65910_MAX_REGISTER, |
| 89 | .num_reg_defaults_raw = TPS65910_MAX_REGISTER, |
| 90 | .cache_type = REGCACHE_RBTREE, |
| 91 | }; |
| 92 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 93 | static int tps65910_i2c_probe(struct i2c_client *i2c, |
| 94 | const struct i2c_device_id *id) |
| 95 | { |
| 96 | struct tps65910 *tps65910; |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 97 | struct tps65910_board *pmic_plat_data; |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 98 | struct tps65910_platform_data *init_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 99 | int ret = 0; |
| 100 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 101 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
| 102 | if (!pmic_plat_data) |
| 103 | return -EINVAL; |
| 104 | |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 105 | init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL); |
| 106 | if (init_data == NULL) |
| 107 | return -ENOMEM; |
| 108 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 109 | tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL); |
Jesper Juhl | dc7e412 | 2011-07-06 00:29:07 +0200 | [diff] [blame] | 110 | if (tps65910 == NULL) { |
| 111 | kfree(init_data); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 112 | return -ENOMEM; |
Jesper Juhl | dc7e412 | 2011-07-06 00:29:07 +0200 | [diff] [blame] | 113 | } |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 114 | |
| 115 | i2c_set_clientdata(i2c, tps65910); |
| 116 | tps65910->dev = &i2c->dev; |
| 117 | tps65910->i2c_client = i2c; |
Jorge Eduardo Candelaria | 7955705 | 2011-05-16 18:34:59 -0500 | [diff] [blame] | 118 | tps65910->id = id->driver_data; |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 119 | tps65910->read = tps65910_i2c_read; |
| 120 | tps65910->write = tps65910_i2c_write; |
| 121 | mutex_init(&tps65910->io_mutex); |
| 122 | |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 123 | tps65910->regmap = regmap_init_i2c(i2c, &rc5t583_regmap_config); |
| 124 | if (IS_ERR(tps65910->regmap)) { |
| 125 | ret = PTR_ERR(tps65910->regmap); |
| 126 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); |
| 127 | goto regmap_err; |
| 128 | } |
| 129 | |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 130 | ret = mfd_add_devices(tps65910->dev, -1, |
| 131 | tps65910s, ARRAY_SIZE(tps65910s), |
| 132 | NULL, 0); |
| 133 | if (ret < 0) |
| 134 | goto err; |
| 135 | |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 136 | init_data->irq = pmic_plat_data->irq; |
Laxman Dewangan | 1773140 | 2012-01-18 20:19:16 +0530 | [diff] [blame] | 137 | init_data->irq_base = pmic_plat_data->irq_base; |
Jesper Juhl | b1224cd | 2011-07-13 23:22:26 +0200 | [diff] [blame] | 138 | |
Graeme Gregory | 2537df7 | 2011-05-02 16:19:52 -0500 | [diff] [blame] | 139 | tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base); |
| 140 | |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 141 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
Graeme Gregory | e3471bd | 2011-05-02 16:20:04 -0500 | [diff] [blame] | 142 | |
Jesper Juhl | dc7e412 | 2011-07-06 00:29:07 +0200 | [diff] [blame] | 143 | kfree(init_data); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 144 | return ret; |
| 145 | |
| 146 | err: |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 147 | regmap_exit(tps65910->regmap); |
| 148 | regmap_err: |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 149 | kfree(tps65910); |
Jesper Juhl | dc7e412 | 2011-07-06 00:29:07 +0200 | [diff] [blame] | 150 | kfree(init_data); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | static int tps65910_i2c_remove(struct i2c_client *i2c) |
| 155 | { |
| 156 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); |
| 157 | |
Mark Brown | ec2328c | 2011-06-20 11:47:55 +0100 | [diff] [blame] | 158 | tps65910_irq_exit(tps65910); |
Afzal Mohammed | 1e351a9 | 2011-12-14 16:05:35 +0530 | [diff] [blame] | 159 | mfd_remove_devices(tps65910->dev); |
Laxman Dewangan | dc9913a | 2012-02-21 18:21:34 +0530 | [diff] [blame^] | 160 | regmap_exit(tps65910->regmap); |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 161 | kfree(tps65910); |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static const struct i2c_device_id tps65910_i2c_id[] = { |
Jorge Eduardo Candelaria | 7955705 | 2011-05-16 18:34:59 -0500 | [diff] [blame] | 167 | { "tps65910", TPS65910 }, |
| 168 | { "tps65911", TPS65911 }, |
Graeme Gregory | 27c6750 | 2011-05-02 16:19:46 -0500 | [diff] [blame] | 169 | { } |
| 170 | }; |
| 171 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); |
| 172 | |
| 173 | |
| 174 | static struct i2c_driver tps65910_i2c_driver = { |
| 175 | .driver = { |
| 176 | .name = "tps65910", |
| 177 | .owner = THIS_MODULE, |
| 178 | }, |
| 179 | .probe = tps65910_i2c_probe, |
| 180 | .remove = tps65910_i2c_remove, |
| 181 | .id_table = tps65910_i2c_id, |
| 182 | }; |
| 183 | |
| 184 | static int __init tps65910_i2c_init(void) |
| 185 | { |
| 186 | return i2c_add_driver(&tps65910_i2c_driver); |
| 187 | } |
| 188 | /* init early so consumer devices can complete system boot */ |
| 189 | subsys_initcall(tps65910_i2c_init); |
| 190 | |
| 191 | static void __exit tps65910_i2c_exit(void) |
| 192 | { |
| 193 | i2c_del_driver(&tps65910_i2c_driver); |
| 194 | } |
| 195 | module_exit(tps65910_i2c_exit); |
| 196 | |
| 197 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); |
| 198 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); |
| 199 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); |
| 200 | MODULE_LICENSE("GPL"); |