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27c6750e GG |
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> | |
dc9913a0 | 19 | #include <linux/err.h> |
27c6750e GG |
20 | #include <linux/slab.h> |
21 | #include <linux/i2c.h> | |
22 | #include <linux/gpio.h> | |
23 | #include <linux/mfd/core.h> | |
dc9913a0 | 24 | #include <linux/regmap.h> |
27c6750e GG |
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 | { | |
dc9913a0 | 43 | return regmap_bulk_read(tps65910->regmap, reg, dest, bytes); |
27c6750e GG |
44 | } |
45 | ||
46 | static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg, | |
dc9913a0 | 47 | int bytes, void *src) |
27c6750e | 48 | { |
dc9913a0 | 49 | return regmap_bulk_write(tps65910->regmap, reg, src, bytes); |
27c6750e GG |
50 | } |
51 | ||
52 | int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask) | |
53 | { | |
dc9913a0 | 54 | return regmap_update_bits(tps65910->regmap, reg, mask, mask); |
27c6750e GG |
55 | } |
56 | EXPORT_SYMBOL_GPL(tps65910_set_bits); | |
57 | ||
58 | int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask) | |
59 | { | |
dc9913a0 | 60 | return regmap_update_bits(tps65910->regmap, reg, mask, 0); |
27c6750e GG |
61 | } |
62 | EXPORT_SYMBOL_GPL(tps65910_clear_bits); | |
63 | ||
dc9913a0 LD |
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 | ||
39ecb037 | 84 | static const struct regmap_config tps65910_regmap_config = { |
dc9913a0 LD |
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 | ||
201cf052 LD |
93 | static int __init tps65910_sleepinit(struct tps65910 *tps65910, |
94 | struct tps65910_board *pmic_pdata) | |
95 | { | |
96 | struct device *dev = NULL; | |
97 | int ret = 0; | |
98 | ||
99 | dev = tps65910->dev; | |
100 | ||
101 | if (!pmic_pdata->en_dev_slp) | |
102 | return 0; | |
103 | ||
104 | /* enabling SLEEP device state */ | |
105 | ret = tps65910_set_bits(tps65910, TPS65910_DEVCTRL, | |
106 | DEVCTRL_DEV_SLP_MASK); | |
107 | if (ret < 0) { | |
108 | dev_err(dev, "set dev_slp failed: %d\n", ret); | |
109 | goto err_sleep_init; | |
110 | } | |
111 | ||
112 | /* Return if there is no sleep keepon data. */ | |
113 | if (!pmic_pdata->slp_keepon) | |
114 | return 0; | |
115 | ||
116 | if (pmic_pdata->slp_keepon->therm_keepon) { | |
117 | ret = tps65910_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, | |
118 | SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); | |
119 | if (ret < 0) { | |
120 | dev_err(dev, "set therm_keepon failed: %d\n", ret); | |
121 | goto disable_dev_slp; | |
122 | } | |
123 | } | |
124 | ||
125 | if (pmic_pdata->slp_keepon->clkout32k_keepon) { | |
126 | ret = tps65910_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, | |
127 | SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); | |
128 | if (ret < 0) { | |
129 | dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); | |
130 | goto disable_dev_slp; | |
131 | } | |
132 | } | |
133 | ||
134 | if (pmic_pdata->slp_keepon->i2chs_keepon) { | |
135 | ret = tps65910_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, | |
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: | |
146 | tps65910_clear_bits(tps65910, TPS65910_DEVCTRL, DEVCTRL_DEV_SLP_MASK); | |
147 | ||
148 | err_sleep_init: | |
149 | return ret; | |
150 | } | |
151 | ||
152 | ||
27c6750e GG |
153 | static int tps65910_i2c_probe(struct i2c_client *i2c, |
154 | const struct i2c_device_id *id) | |
155 | { | |
156 | struct tps65910 *tps65910; | |
2537df72 | 157 | struct tps65910_board *pmic_plat_data; |
e3471bdc | 158 | struct tps65910_platform_data *init_data; |
27c6750e GG |
159 | int ret = 0; |
160 | ||
2537df72 GG |
161 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
162 | if (!pmic_plat_data) | |
163 | return -EINVAL; | |
164 | ||
e3471bdc GG |
165 | init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL); |
166 | if (init_data == NULL) | |
167 | return -ENOMEM; | |
168 | ||
27c6750e | 169 | tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL); |
dc7e412d JJ |
170 | if (tps65910 == NULL) { |
171 | kfree(init_data); | |
27c6750e | 172 | return -ENOMEM; |
dc7e412d | 173 | } |
27c6750e GG |
174 | |
175 | i2c_set_clientdata(i2c, tps65910); | |
176 | tps65910->dev = &i2c->dev; | |
177 | tps65910->i2c_client = i2c; | |
79557056 | 178 | tps65910->id = id->driver_data; |
27c6750e GG |
179 | tps65910->read = tps65910_i2c_read; |
180 | tps65910->write = tps65910_i2c_write; | |
181 | mutex_init(&tps65910->io_mutex); | |
182 | ||
39ecb037 | 183 | tps65910->regmap = regmap_init_i2c(i2c, &tps65910_regmap_config); |
dc9913a0 LD |
184 | if (IS_ERR(tps65910->regmap)) { |
185 | ret = PTR_ERR(tps65910->regmap); | |
186 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); | |
187 | goto regmap_err; | |
188 | } | |
189 | ||
27c6750e GG |
190 | ret = mfd_add_devices(tps65910->dev, -1, |
191 | tps65910s, ARRAY_SIZE(tps65910s), | |
192 | NULL, 0); | |
193 | if (ret < 0) | |
194 | goto err; | |
195 | ||
b1224cd1 | 196 | init_data->irq = pmic_plat_data->irq; |
1773140f | 197 | init_data->irq_base = pmic_plat_data->irq_base; |
b1224cd1 | 198 | |
2537df72 GG |
199 | tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base); |
200 | ||
1e351a95 | 201 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
e3471bdc | 202 | |
201cf052 LD |
203 | tps65910_sleepinit(tps65910, pmic_plat_data); |
204 | ||
dc7e412d | 205 | kfree(init_data); |
27c6750e GG |
206 | return ret; |
207 | ||
208 | err: | |
dc9913a0 LD |
209 | regmap_exit(tps65910->regmap); |
210 | regmap_err: | |
27c6750e | 211 | kfree(tps65910); |
dc7e412d | 212 | kfree(init_data); |
27c6750e GG |
213 | return ret; |
214 | } | |
215 | ||
216 | static int tps65910_i2c_remove(struct i2c_client *i2c) | |
217 | { | |
218 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); | |
219 | ||
ec2328c3 | 220 | tps65910_irq_exit(tps65910); |
1e351a95 | 221 | mfd_remove_devices(tps65910->dev); |
dc9913a0 | 222 | regmap_exit(tps65910->regmap); |
27c6750e GG |
223 | kfree(tps65910); |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static const struct i2c_device_id tps65910_i2c_id[] = { | |
79557056 JEC |
229 | { "tps65910", TPS65910 }, |
230 | { "tps65911", TPS65911 }, | |
27c6750e GG |
231 | { } |
232 | }; | |
233 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); | |
234 | ||
235 | ||
236 | static struct i2c_driver tps65910_i2c_driver = { | |
237 | .driver = { | |
238 | .name = "tps65910", | |
239 | .owner = THIS_MODULE, | |
240 | }, | |
241 | .probe = tps65910_i2c_probe, | |
242 | .remove = tps65910_i2c_remove, | |
243 | .id_table = tps65910_i2c_id, | |
244 | }; | |
245 | ||
246 | static int __init tps65910_i2c_init(void) | |
247 | { | |
248 | return i2c_add_driver(&tps65910_i2c_driver); | |
249 | } | |
250 | /* init early so consumer devices can complete system boot */ | |
251 | subsys_initcall(tps65910_i2c_init); | |
252 | ||
253 | static void __exit tps65910_i2c_exit(void) | |
254 | { | |
255 | i2c_del_driver(&tps65910_i2c_driver); | |
256 | } | |
257 | module_exit(tps65910_i2c_exit); | |
258 | ||
259 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
260 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); | |
261 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); | |
262 | MODULE_LICENSE("GPL"); |