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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 | 26 | |
5863eabb VB |
27 | static struct resource rtc_resources[] = { |
28 | { | |
29 | .start = TPS65910_IRQ_RTC_ALARM, | |
30 | .end = TPS65910_IRQ_RTC_ALARM, | |
31 | .flags = IORESOURCE_IRQ, | |
32 | } | |
33 | }; | |
34 | ||
27c6750e | 35 | static struct mfd_cell tps65910s[] = { |
32df986e LD |
36 | { |
37 | .name = "tps65910-gpio", | |
38 | }, | |
27c6750e GG |
39 | { |
40 | .name = "tps65910-pmic", | |
41 | }, | |
42 | { | |
43 | .name = "tps65910-rtc", | |
5863eabb VB |
44 | .num_resources = ARRAY_SIZE(rtc_resources), |
45 | .resources = &rtc_resources[0], | |
27c6750e GG |
46 | }, |
47 | { | |
48 | .name = "tps65910-power", | |
49 | }, | |
50 | }; | |
51 | ||
52 | ||
dc9913a0 LD |
53 | static bool is_volatile_reg(struct device *dev, unsigned int reg) |
54 | { | |
55 | struct tps65910 *tps65910 = dev_get_drvdata(dev); | |
56 | ||
57 | /* | |
58 | * Caching all regulator registers. | |
59 | * All regualator register address range is same for | |
60 | * TPS65910 and TPS65911 | |
61 | */ | |
62 | if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { | |
63 | /* Check for non-existing register */ | |
64 | if (tps65910_chip_id(tps65910) == TPS65910) | |
65 | if ((reg == TPS65911_VDDCTRL_OP) || | |
66 | (reg == TPS65911_VDDCTRL_SR)) | |
67 | return true; | |
68 | return false; | |
69 | } | |
70 | return true; | |
71 | } | |
72 | ||
39ecb037 | 73 | static const struct regmap_config tps65910_regmap_config = { |
dc9913a0 LD |
74 | .reg_bits = 8, |
75 | .val_bits = 8, | |
76 | .volatile_reg = is_volatile_reg, | |
3bf6bf9b | 77 | .max_register = TPS65910_MAX_REGISTER - 1, |
dc9913a0 LD |
78 | .cache_type = REGCACHE_RBTREE, |
79 | }; | |
80 | ||
d02e83cb | 81 | static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910, |
712db99d JH |
82 | struct tps65910_board *pmic_pdata) |
83 | { | |
712db99d JH |
84 | int ret; |
85 | ||
d02e83cb JH |
86 | if (!pmic_pdata->en_ck32k_xtal) |
87 | return 0; | |
88 | ||
89 | ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, | |
712db99d | 90 | DEVCTRL_CK32K_CTRL_MASK); |
d02e83cb JH |
91 | if (ret < 0) { |
92 | dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret); | |
93 | return ret; | |
712db99d JH |
94 | } |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
63745d40 | 99 | static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, |
201cf052 LD |
100 | struct tps65910_board *pmic_pdata) |
101 | { | |
102 | struct device *dev = NULL; | |
103 | int ret = 0; | |
104 | ||
105 | dev = tps65910->dev; | |
106 | ||
107 | if (!pmic_pdata->en_dev_slp) | |
108 | return 0; | |
109 | ||
110 | /* enabling SLEEP device state */ | |
3f7e8275 | 111 | ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, |
201cf052 LD |
112 | DEVCTRL_DEV_SLP_MASK); |
113 | if (ret < 0) { | |
114 | dev_err(dev, "set dev_slp failed: %d\n", ret); | |
115 | goto err_sleep_init; | |
116 | } | |
117 | ||
118 | /* Return if there is no sleep keepon data. */ | |
119 | if (!pmic_pdata->slp_keepon) | |
120 | return 0; | |
121 | ||
122 | if (pmic_pdata->slp_keepon->therm_keepon) { | |
3f7e8275 RK |
123 | ret = tps65910_reg_set_bits(tps65910, |
124 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
125 | SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); |
126 | if (ret < 0) { | |
127 | dev_err(dev, "set therm_keepon failed: %d\n", ret); | |
128 | goto disable_dev_slp; | |
129 | } | |
130 | } | |
131 | ||
132 | if (pmic_pdata->slp_keepon->clkout32k_keepon) { | |
3f7e8275 RK |
133 | ret = tps65910_reg_set_bits(tps65910, |
134 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
135 | SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); |
136 | if (ret < 0) { | |
137 | dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); | |
138 | goto disable_dev_slp; | |
139 | } | |
140 | } | |
141 | ||
142 | if (pmic_pdata->slp_keepon->i2chs_keepon) { | |
3f7e8275 RK |
143 | ret = tps65910_reg_set_bits(tps65910, |
144 | TPS65910_SLEEP_KEEP_RES_ON, | |
201cf052 LD |
145 | SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); |
146 | if (ret < 0) { | |
147 | dev_err(dev, "set i2chs_keepon failed: %d\n", ret); | |
148 | goto disable_dev_slp; | |
149 | } | |
150 | } | |
151 | ||
152 | return 0; | |
153 | ||
154 | disable_dev_slp: | |
3f7e8275 RK |
155 | tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, |
156 | DEVCTRL_DEV_SLP_MASK); | |
201cf052 LD |
157 | |
158 | err_sleep_init: | |
159 | return ret; | |
160 | } | |
161 | ||
cd4209ce RK |
162 | #ifdef CONFIG_OF |
163 | static struct of_device_id tps65910_of_match[] = { | |
164 | { .compatible = "ti,tps65910", .data = (void *)TPS65910}, | |
165 | { .compatible = "ti,tps65911", .data = (void *)TPS65911}, | |
166 | { }, | |
167 | }; | |
168 | MODULE_DEVICE_TABLE(of, tps65910_of_match); | |
169 | ||
170 | static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, | |
171 | int *chip_id) | |
172 | { | |
173 | struct device_node *np = client->dev.of_node; | |
174 | struct tps65910_board *board_info; | |
175 | unsigned int prop; | |
176 | const struct of_device_id *match; | |
cd4209ce | 177 | int ret = 0; |
cd4209ce RK |
178 | |
179 | match = of_match_device(tps65910_of_match, &client->dev); | |
180 | if (!match) { | |
181 | dev_err(&client->dev, "Failed to find matching dt id\n"); | |
182 | return NULL; | |
183 | } | |
184 | ||
185 | *chip_id = (int)match->data; | |
186 | ||
187 | board_info = devm_kzalloc(&client->dev, sizeof(*board_info), | |
188 | GFP_KERNEL); | |
189 | if (!board_info) { | |
190 | dev_err(&client->dev, "Failed to allocate pdata\n"); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); | |
195 | if (!ret) | |
196 | board_info->vmbch_threshold = prop; | |
197 | else if (*chip_id == TPS65911) | |
198 | dev_warn(&client->dev, "VMBCH-Threshold not specified"); | |
199 | ||
200 | ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); | |
201 | if (!ret) | |
202 | board_info->vmbch2_threshold = prop; | |
203 | else if (*chip_id == TPS65911) | |
204 | dev_warn(&client->dev, "VMBCH2-Threshold not specified"); | |
205 | ||
bcc1dd4c JH |
206 | prop = of_property_read_bool(np, "ti,en-ck32k-xtal"); |
207 | board_info->en_ck32k_xtal = prop; | |
208 | ||
cd4209ce RK |
209 | board_info->irq = client->irq; |
210 | board_info->irq_base = -1; | |
b079fa72 BH |
211 | board_info->pm_off = of_property_read_bool(np, |
212 | "ti,system-power-controller"); | |
cd4209ce RK |
213 | |
214 | return board_info; | |
215 | } | |
216 | #else | |
7f65f74c SO |
217 | static inline |
218 | struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, | |
219 | int *chip_id) | |
cd4209ce RK |
220 | { |
221 | return NULL; | |
222 | } | |
223 | #endif | |
201cf052 | 224 | |
b079fa72 BH |
225 | static struct i2c_client *tps65910_i2c_client; |
226 | static void tps65910_power_off(void) | |
227 | { | |
228 | struct tps65910 *tps65910; | |
229 | ||
230 | tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev); | |
231 | ||
232 | if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, | |
233 | DEVCTRL_PWR_OFF_MASK) < 0) | |
234 | return; | |
235 | ||
236 | tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, | |
237 | DEVCTRL_DEV_ON_MASK); | |
238 | } | |
239 | ||
63745d40 MB |
240 | static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, |
241 | const struct i2c_device_id *id) | |
27c6750e GG |
242 | { |
243 | struct tps65910 *tps65910; | |
2537df72 | 244 | struct tps65910_board *pmic_plat_data; |
cb8d8654 | 245 | struct tps65910_board *of_pmic_plat_data = NULL; |
e3471bdc | 246 | struct tps65910_platform_data *init_data; |
27c6750e | 247 | int ret = 0; |
cd4209ce | 248 | int chip_id = id->driver_data; |
27c6750e | 249 | |
2537df72 | 250 | pmic_plat_data = dev_get_platdata(&i2c->dev); |
cd4209ce | 251 | |
cb8d8654 | 252 | if (!pmic_plat_data && i2c->dev.of_node) { |
cd4209ce | 253 | pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); |
cb8d8654 LD |
254 | of_pmic_plat_data = pmic_plat_data; |
255 | } | |
cd4209ce | 256 | |
2537df72 GG |
257 | if (!pmic_plat_data) |
258 | return -EINVAL; | |
259 | ||
63fe7dee | 260 | init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); |
e3471bdc GG |
261 | if (init_data == NULL) |
262 | return -ENOMEM; | |
263 | ||
63fe7dee LD |
264 | tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); |
265 | if (tps65910 == NULL) | |
27c6750e GG |
266 | return -ENOMEM; |
267 | ||
cb8d8654 | 268 | tps65910->of_plat_data = of_pmic_plat_data; |
27c6750e GG |
269 | i2c_set_clientdata(i2c, tps65910); |
270 | tps65910->dev = &i2c->dev; | |
271 | tps65910->i2c_client = i2c; | |
cd4209ce | 272 | tps65910->id = chip_id; |
27c6750e GG |
273 | mutex_init(&tps65910->io_mutex); |
274 | ||
63fe7dee | 275 | tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); |
dc9913a0 LD |
276 | if (IS_ERR(tps65910->regmap)) { |
277 | ret = PTR_ERR(tps65910->regmap); | |
278 | dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); | |
63fe7dee | 279 | return ret; |
dc9913a0 LD |
280 | } |
281 | ||
27c6750e GG |
282 | ret = mfd_add_devices(tps65910->dev, -1, |
283 | tps65910s, ARRAY_SIZE(tps65910s), | |
55692af5 | 284 | NULL, 0, NULL); |
63fe7dee LD |
285 | if (ret < 0) { |
286 | dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); | |
287 | return ret; | |
288 | } | |
27c6750e | 289 | |
b1224cd1 | 290 | init_data->irq = pmic_plat_data->irq; |
1773140f | 291 | init_data->irq_base = pmic_plat_data->irq_base; |
b1224cd1 | 292 | |
1e351a95 | 293 | tps65910_irq_init(tps65910, init_data->irq, init_data); |
d02e83cb | 294 | tps65910_ck32k_init(tps65910, pmic_plat_data); |
201cf052 LD |
295 | tps65910_sleepinit(tps65910, pmic_plat_data); |
296 | ||
b079fa72 BH |
297 | if (pmic_plat_data->pm_off && !pm_power_off) { |
298 | tps65910_i2c_client = i2c; | |
299 | pm_power_off = tps65910_power_off; | |
300 | } | |
301 | ||
27c6750e GG |
302 | return ret; |
303 | } | |
304 | ||
63745d40 | 305 | static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) |
27c6750e GG |
306 | { |
307 | struct tps65910 *tps65910 = i2c_get_clientdata(i2c); | |
308 | ||
ec2328c3 | 309 | tps65910_irq_exit(tps65910); |
1e351a95 | 310 | mfd_remove_devices(tps65910->dev); |
27c6750e GG |
311 | |
312 | return 0; | |
313 | } | |
314 | ||
315 | static const struct i2c_device_id tps65910_i2c_id[] = { | |
79557056 JEC |
316 | { "tps65910", TPS65910 }, |
317 | { "tps65911", TPS65911 }, | |
27c6750e GG |
318 | { } |
319 | }; | |
320 | MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); | |
321 | ||
322 | ||
323 | static struct i2c_driver tps65910_i2c_driver = { | |
324 | .driver = { | |
325 | .name = "tps65910", | |
326 | .owner = THIS_MODULE, | |
cd4209ce | 327 | .of_match_table = of_match_ptr(tps65910_of_match), |
27c6750e GG |
328 | }, |
329 | .probe = tps65910_i2c_probe, | |
84449216 | 330 | .remove = tps65910_i2c_remove, |
27c6750e GG |
331 | .id_table = tps65910_i2c_id, |
332 | }; | |
333 | ||
334 | static int __init tps65910_i2c_init(void) | |
335 | { | |
336 | return i2c_add_driver(&tps65910_i2c_driver); | |
337 | } | |
338 | /* init early so consumer devices can complete system boot */ | |
339 | subsys_initcall(tps65910_i2c_init); | |
340 | ||
341 | static void __exit tps65910_i2c_exit(void) | |
342 | { | |
343 | i2c_del_driver(&tps65910_i2c_driver); | |
344 | } | |
345 | module_exit(tps65910_i2c_exit); | |
346 | ||
347 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
348 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); | |
349 | MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); | |
350 | MODULE_LICENSE("GPL"); |