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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> | |
27c6750e | 22 | #include <linux/mfd/core.h> |
dc9913a0 | 23 | #include <linux/regmap.h> |
27c6750e | 24 | #include <linux/mfd/tps65910.h> |
cd4209ce | 25 | #include <linux/of_device.h> |
27c6750e GG |
26 | |
27 | static struct mfd_cell tps65910s[] = { | |
32df986e LD |
28 | { |
29 | .name = "tps65910-gpio", | |
30 | }, | |
27c6750e GG |
31 | { |
32 | .name = "tps65910-pmic", | |
33 | }, | |
34 | { | |
35 | .name = "tps65910-rtc", | |
36 | }, | |
37 | { | |
38 | .name = "tps65910-power", | |
39 | }, | |
40 | }; | |
41 | ||
42 | ||
dc9913a0 LD |
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 | ||
39ecb037 | 63 | static const struct regmap_config tps65910_regmap_config = { |
dc9913a0 LD |
64 | .reg_bits = 8, |
65 | .val_bits = 8, | |
66 | .volatile_reg = is_volatile_reg, | |
3bf6bf9b | 67 | .max_register = TPS65910_MAX_REGISTER - 1, |
dc9913a0 LD |
68 | .cache_type = REGCACHE_RBTREE, |
69 | }; | |
70 | ||
63745d40 | 71 | static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, |
201cf052 LD |
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 */ | |
3f7e8275 | 83 | ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, |
201cf052 LD |
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) { | |
3f7e8275 RK |
95 | ret = tps65910_reg_set_bits(tps65910, |
96 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
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) { | |
3f7e8275 RK |
105 | ret = tps65910_reg_set_bits(tps65910, |
106 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
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) { | |
3f7e8275 RK |
115 | ret = tps65910_reg_set_bits(tps65910, |
116 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
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: | |
3f7e8275 RK |
127 | tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, |
128 | DEVCTRL_DEV_SLP_MASK); | |
201cf052 LD |
129 | |
130 | err_sleep_init: | |
131 | return ret; | |
132 | } | |
133 | ||
cd4209ce RK |
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 | |
7f65f74c SO |
199 | static inline |
200 | struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, | |
201 | int *chip_id) | |
cd4209ce RK |
202 | { |
203 | return NULL; | |
204 | } | |
205 | #endif | |
201cf052 | 206 | |
63745d40 MB |
207 | static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, |
208 | const struct i2c_device_id *id) | |
27c6750e GG |
209 | { |
210 | struct tps65910 *tps65910; | |
2537df72 | 211 | struct tps65910_board *pmic_plat_data; |
cb8d8654 | 212 | struct tps65910_board *of_pmic_plat_data = NULL; |
e3471bdc | 213 | struct tps65910_platform_data *init_data; |
27c6750e | 214 | int ret = 0; |
cd4209ce | 215 | int chip_id = id->driver_data; |
27c6750e | 216 | |
2537df72 | 217 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
cd4209ce | 218 | |
cb8d8654 | 219 | if (!pmic_plat_data && i2c->dev.of_node) { |
cd4209ce | 220 | pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); |
cb8d8654 LD |
221 | of_pmic_plat_data = pmic_plat_data; |
222 | } | |
cd4209ce | 223 | |
2537df72 GG |
224 | if (!pmic_plat_data) |
225 | return -EINVAL; | |
226 | ||
63fe7dee | 227 | init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); |
e3471bdc GG |
228 | if (init_data == NULL) |
229 | return -ENOMEM; | |
230 | ||
63fe7dee LD |
231 | tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); |
232 | if (tps65910 == NULL) | |
27c6750e GG |
233 | return -ENOMEM; |
234 | ||
cb8d8654 | 235 | tps65910->of_plat_data = of_pmic_plat_data; |
27c6750e GG |
236 | i2c_set_clientdata(i2c, tps65910); |
237 | tps65910->dev = &i2c->dev; | |
238 | tps65910->i2c_client = i2c; | |
cd4209ce | 239 | tps65910->id = chip_id; |
27c6750e GG |
240 | mutex_init(&tps65910->io_mutex); |
241 | ||
63fe7dee | 242 | tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); |
dc9913a0 LD |
243 | if (IS_ERR(tps65910->regmap)) { |
244 | ret = PTR_ERR(tps65910->regmap); | |
245 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); | |
63fe7dee | 246 | return ret; |
dc9913a0 LD |
247 | } |
248 | ||
27c6750e GG |
249 | ret = mfd_add_devices(tps65910->dev, -1, |
250 | tps65910s, ARRAY_SIZE(tps65910s), | |
251 | NULL, 0); | |
63fe7dee LD |
252 | if (ret < 0) { |
253 | dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); | |
254 | return ret; | |
255 | } | |
27c6750e | 256 | |
b1224cd1 | 257 | init_data->irq = pmic_plat_data->irq; |
1773140f | 258 | init_data->irq_base = pmic_plat_data->irq_base; |
b1224cd1 | 259 | |
1e351a95 | 260 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
e3471bdc | 261 | |
201cf052 LD |
262 | tps65910_sleepinit(tps65910, pmic_plat_data); |
263 | ||
27c6750e GG |
264 | return ret; |
265 | } | |
266 | ||
63745d40 | 267 | static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) |
27c6750e GG |
268 | { |
269 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); | |
270 | ||
ec2328c3 | 271 | tps65910_irq_exit(tps65910); |
1e351a95 | 272 | mfd_remove_devices(tps65910->dev); |
27c6750e GG |
273 | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static const struct i2c_device_id tps65910_i2c_id[] = { | |
79557056 JEC |
278 | { "tps65910", TPS65910 }, |
279 | { "tps65911", TPS65911 }, | |
27c6750e GG |
280 | { } |
281 | }; | |
282 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); | |
283 | ||
284 | ||
285 | static struct i2c_driver tps65910_i2c_driver = { | |
286 | .driver = { | |
287 | .name = "tps65910", | |
288 | .owner = THIS_MODULE, | |
cd4209ce | 289 | .of_match_table = of_match_ptr(tps65910_of_match), |
27c6750e GG |
290 | }, |
291 | .probe = tps65910_i2c_probe, | |
63745d40 | 292 | .remove = __devexit_p(tps65910_i2c_remove), |
27c6750e GG |
293 | .id_table = tps65910_i2c_id, |
294 | }; | |
295 | ||
296 | static int __init tps65910_i2c_init(void) | |
297 | { | |
298 | return i2c_add_driver(&tps65910_i2c_driver); | |
299 | } | |
300 | /* init early so consumer devices can complete system boot */ | |
301 | subsys_initcall(tps65910_i2c_init); | |
302 | ||
303 | static void __exit tps65910_i2c_exit(void) | |
304 | { | |
305 | i2c_del_driver(&tps65910_i2c_driver); | |
306 | } | |
307 | module_exit(tps65910_i2c_exit); | |
308 | ||
309 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
310 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); | |
311 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); | |
312 | MODULE_LICENSE("GPL"); |