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Commit | Line | Data |
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d48f411c AC |
1 | /* |
2 | * tps65217.c | |
3 | * | |
4 | * TPS65217 chip family multi-function driver | |
5 | * | |
6 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation version 2. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
d48f411c | 18 | #include <linux/device.h> |
6556bdac | 19 | #include <linux/err.h> |
d48f411c | 20 | #include <linux/init.h> |
6556bdac | 21 | #include <linux/interrupt.h> |
d48f411c | 22 | #include <linux/i2c.h> |
6556bdac MN |
23 | #include <linux/irq.h> |
24 | #include <linux/irqdomain.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
817bb7fb AC |
27 | #include <linux/of.h> |
28 | #include <linux/of_device.h> | |
6556bdac MN |
29 | #include <linux/platform_device.h> |
30 | #include <linux/regmap.h> | |
31 | #include <linux/slab.h> | |
d48f411c AC |
32 | |
33 | #include <linux/mfd/core.h> | |
34 | #include <linux/mfd/tps65217.h> | |
35 | ||
6556bdac MN |
36 | static struct resource charger_resources[] = { |
37 | DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"), | |
38 | DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"), | |
39 | }; | |
40 | ||
dea9c730 MN |
41 | static struct resource pb_resources[] = { |
42 | DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"), | |
43 | }; | |
44 | ||
6556bdac MN |
45 | static void tps65217_irq_lock(struct irq_data *data) |
46 | { | |
47 | struct tps65217 *tps = irq_data_get_irq_chip_data(data); | |
48 | ||
49 | mutex_lock(&tps->irq_lock); | |
50 | } | |
51 | ||
52 | static void tps65217_irq_sync_unlock(struct irq_data *data) | |
53 | { | |
54 | struct tps65217 *tps = irq_data_get_irq_chip_data(data); | |
55 | int ret; | |
56 | ||
fa917052 MK |
57 | ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK, |
58 | tps->irq_mask, TPS65217_PROTECT_NONE); | |
6556bdac MN |
59 | if (ret != 0) |
60 | dev_err(tps->dev, "Failed to sync IRQ masks\n"); | |
61 | ||
62 | mutex_unlock(&tps->irq_lock); | |
63 | } | |
64 | ||
6556bdac MN |
65 | static void tps65217_irq_enable(struct irq_data *data) |
66 | { | |
67 | struct tps65217 *tps = irq_data_get_irq_chip_data(data); | |
fa917052 | 68 | u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT; |
6556bdac | 69 | |
fa917052 | 70 | tps->irq_mask &= ~mask; |
6556bdac MN |
71 | } |
72 | ||
73 | static void tps65217_irq_disable(struct irq_data *data) | |
74 | { | |
75 | struct tps65217 *tps = irq_data_get_irq_chip_data(data); | |
fa917052 | 76 | u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT; |
6556bdac | 77 | |
fa917052 | 78 | tps->irq_mask |= mask; |
6556bdac MN |
79 | } |
80 | ||
81 | static struct irq_chip tps65217_irq_chip = { | |
f6602064 | 82 | .name = "tps65217", |
6556bdac MN |
83 | .irq_bus_lock = tps65217_irq_lock, |
84 | .irq_bus_sync_unlock = tps65217_irq_sync_unlock, | |
85 | .irq_enable = tps65217_irq_enable, | |
86 | .irq_disable = tps65217_irq_disable, | |
87 | }; | |
88 | ||
89 | static struct mfd_cell tps65217s[] = { | |
817bb7fb AC |
90 | { |
91 | .name = "tps65217-pmic", | |
11d0d300 | 92 | .of_compatible = "ti,tps65217-pmic", |
817bb7fb | 93 | }, |
b6290ffe MK |
94 | { |
95 | .name = "tps65217-bl", | |
11d0d300 | 96 | .of_compatible = "ti,tps65217-bl", |
b6290ffe | 97 | }, |
55cec67a EBS |
98 | { |
99 | .name = "tps65217-charger", | |
6556bdac MN |
100 | .num_resources = ARRAY_SIZE(charger_resources), |
101 | .resources = charger_resources, | |
55cec67a EBS |
102 | .of_compatible = "ti,tps65217-charger", |
103 | }, | |
dea9c730 MN |
104 | { |
105 | .name = "tps65217-pwrbutton", | |
106 | .num_resources = ARRAY_SIZE(pb_resources), | |
107 | .resources = pb_resources, | |
108 | .of_compatible = "ti,tps65217-pwrbutton", | |
109 | }, | |
817bb7fb AC |
110 | }; |
111 | ||
6556bdac MN |
112 | static irqreturn_t tps65217_irq_thread(int irq, void *data) |
113 | { | |
114 | struct tps65217 *tps = data; | |
115 | unsigned int status; | |
116 | bool handled = false; | |
117 | int i; | |
118 | int ret; | |
119 | ||
120 | ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status); | |
121 | if (ret < 0) { | |
122 | dev_err(tps->dev, "Failed to read IRQ status: %d\n", | |
123 | ret); | |
124 | return IRQ_NONE; | |
125 | } | |
126 | ||
fa917052 MK |
127 | for (i = 0; i < TPS65217_NUM_IRQ; i++) { |
128 | if (status & BIT(i)) { | |
6556bdac MN |
129 | handle_nested_irq(irq_find_mapping(tps->irq_domain, i)); |
130 | handled = true; | |
131 | } | |
132 | } | |
133 | ||
134 | if (handled) | |
135 | return IRQ_HANDLED; | |
136 | ||
137 | return IRQ_NONE; | |
138 | } | |
139 | ||
140 | static int tps65217_irq_map(struct irq_domain *h, unsigned int virq, | |
141 | irq_hw_number_t hw) | |
142 | { | |
143 | struct tps65217 *tps = h->host_data; | |
144 | ||
145 | irq_set_chip_data(virq, tps); | |
146 | irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq); | |
147 | irq_set_nested_thread(virq, 1); | |
148 | irq_set_parent(virq, tps->irq); | |
149 | irq_set_noprobe(virq); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static const struct irq_domain_ops tps65217_irq_domain_ops = { | |
155 | .map = tps65217_irq_map, | |
156 | }; | |
157 | ||
158 | static int tps65217_irq_init(struct tps65217 *tps, int irq) | |
159 | { | |
160 | int ret; | |
161 | ||
162 | mutex_init(&tps->irq_lock); | |
163 | tps->irq = irq; | |
164 | ||
165 | /* Mask all interrupt sources */ | |
6d2c2b9f MK |
166 | tps->irq_mask = TPS65217_INT_MASK; |
167 | tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK, | |
168 | TPS65217_INT_MASK, TPS65217_PROTECT_NONE); | |
6556bdac MN |
169 | |
170 | tps->irq_domain = irq_domain_add_linear(tps->dev->of_node, | |
171 | TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps); | |
172 | if (!tps->irq_domain) { | |
173 | dev_err(tps->dev, "Could not create IRQ domain\n"); | |
174 | return -ENOMEM; | |
175 | } | |
176 | ||
177 | ret = devm_request_threaded_irq(tps->dev, irq, NULL, | |
178 | tps65217_irq_thread, IRQF_ONESHOT, | |
179 | "tps65217-irq", tps); | |
180 | if (ret) { | |
181 | dev_err(tps->dev, "Failed to request IRQ %d: %d\n", | |
182 | irq, ret); | |
183 | return ret; | |
184 | } | |
185 | ||
93559191 MK |
186 | enable_irq_wake(irq); |
187 | ||
6556bdac MN |
188 | return 0; |
189 | } | |
190 | ||
d48f411c AC |
191 | /** |
192 | * tps65217_reg_read: Read a single tps65217 register. | |
193 | * | |
194 | * @tps: Device to read from. | |
195 | * @reg: Register to read. | |
196 | * @val: Contians the value | |
197 | */ | |
198 | int tps65217_reg_read(struct tps65217 *tps, unsigned int reg, | |
199 | unsigned int *val) | |
200 | { | |
201 | return regmap_read(tps->regmap, reg, val); | |
202 | } | |
203 | EXPORT_SYMBOL_GPL(tps65217_reg_read); | |
204 | ||
205 | /** | |
206 | * tps65217_reg_write: Write a single tps65217 register. | |
207 | * | |
208 | * @tps65217: Device to write to. | |
209 | * @reg: Register to write to. | |
210 | * @val: Value to write. | |
211 | * @level: Password protected level | |
212 | */ | |
213 | int tps65217_reg_write(struct tps65217 *tps, unsigned int reg, | |
214 | unsigned int val, unsigned int level) | |
215 | { | |
216 | int ret; | |
217 | unsigned int xor_reg_val; | |
218 | ||
219 | switch (level) { | |
220 | case TPS65217_PROTECT_NONE: | |
221 | return regmap_write(tps->regmap, reg, val); | |
222 | case TPS65217_PROTECT_L1: | |
223 | xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK; | |
224 | ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD, | |
225 | xor_reg_val); | |
226 | if (ret < 0) | |
227 | return ret; | |
228 | ||
229 | return regmap_write(tps->regmap, reg, val); | |
230 | case TPS65217_PROTECT_L2: | |
231 | xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK; | |
232 | ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD, | |
233 | xor_reg_val); | |
234 | if (ret < 0) | |
235 | return ret; | |
236 | ret = regmap_write(tps->regmap, reg, val); | |
237 | if (ret < 0) | |
238 | return ret; | |
239 | ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD, | |
240 | xor_reg_val); | |
241 | if (ret < 0) | |
242 | return ret; | |
243 | return regmap_write(tps->regmap, reg, val); | |
244 | default: | |
245 | return -EINVAL; | |
246 | } | |
247 | } | |
248 | EXPORT_SYMBOL_GPL(tps65217_reg_write); | |
249 | ||
250 | /** | |
251 | * tps65217_update_bits: Modify bits w.r.t mask, val and level. | |
252 | * | |
253 | * @tps65217: Device to write to. | |
254 | * @reg: Register to read-write to. | |
255 | * @mask: Mask. | |
256 | * @val: Value to write. | |
257 | * @level: Password protected level | |
258 | */ | |
27757e82 | 259 | static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg, |
d48f411c AC |
260 | unsigned int mask, unsigned int val, unsigned int level) |
261 | { | |
262 | int ret; | |
263 | unsigned int data; | |
264 | ||
265 | ret = tps65217_reg_read(tps, reg, &data); | |
266 | if (ret) { | |
267 | dev_err(tps->dev, "Read from reg 0x%x failed\n", reg); | |
268 | return ret; | |
269 | } | |
270 | ||
271 | data &= ~mask; | |
272 | data |= val & mask; | |
273 | ||
274 | ret = tps65217_reg_write(tps, reg, data, level); | |
275 | if (ret) | |
276 | dev_err(tps->dev, "Write for reg 0x%x failed\n", reg); | |
277 | ||
278 | return ret; | |
279 | } | |
280 | ||
281 | int tps65217_set_bits(struct tps65217 *tps, unsigned int reg, | |
282 | unsigned int mask, unsigned int val, unsigned int level) | |
283 | { | |
284 | return tps65217_update_bits(tps, reg, mask, val, level); | |
285 | } | |
286 | EXPORT_SYMBOL_GPL(tps65217_set_bits); | |
287 | ||
288 | int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg, | |
289 | unsigned int mask, unsigned int level) | |
290 | { | |
291 | return tps65217_update_bits(tps, reg, mask, 0, level); | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(tps65217_clear_bits); | |
294 | ||
6556bdac MN |
295 | static bool tps65217_volatile_reg(struct device *dev, unsigned int reg) |
296 | { | |
297 | switch (reg) { | |
298 | case TPS65217_REG_INT: | |
299 | return true; | |
300 | default: | |
301 | return false; | |
302 | } | |
303 | } | |
304 | ||
af0a837d | 305 | static const struct regmap_config tps65217_regmap_config = { |
d48f411c AC |
306 | .reg_bits = 8, |
307 | .val_bits = 8, | |
0b496b4c MB |
308 | |
309 | .max_register = TPS65217_REG_MAX, | |
6556bdac | 310 | .volatile_reg = tps65217_volatile_reg, |
d48f411c AC |
311 | }; |
312 | ||
817bb7fb AC |
313 | static const struct of_device_id tps65217_of_match[] = { |
314 | { .compatible = "ti,tps65217", .data = (void *)TPS65217 }, | |
315 | { /* sentinel */ }, | |
316 | }; | |
4895e493 | 317 | MODULE_DEVICE_TABLE(of, tps65217_of_match); |
817bb7fb | 318 | |
f791be49 | 319 | static int tps65217_probe(struct i2c_client *client, |
d48f411c AC |
320 | const struct i2c_device_id *ids) |
321 | { | |
322 | struct tps65217 *tps; | |
d48f411c | 323 | unsigned int version; |
5c6fbd56 | 324 | unsigned long chip_id = ids->driver_data; |
817bb7fb | 325 | const struct of_device_id *match; |
eb433dad | 326 | bool status_off = false; |
817bb7fb | 327 | int ret; |
d48f411c | 328 | |
817bb7fb AC |
329 | if (client->dev.of_node) { |
330 | match = of_match_device(tps65217_of_match, &client->dev); | |
331 | if (!match) { | |
332 | dev_err(&client->dev, | |
333 | "Failed to find matching dt id\n"); | |
334 | return -EINVAL; | |
335 | } | |
5c6fbd56 | 336 | chip_id = (unsigned long)match->data; |
eb433dad CFP |
337 | status_off = of_property_read_bool(client->dev.of_node, |
338 | "ti,pmic-shutdown-controller"); | |
817bb7fb AC |
339 | } |
340 | ||
341 | if (!chip_id) { | |
342 | dev_err(&client->dev, "id is null.\n"); | |
343 | return -ENODEV; | |
344 | } | |
a7f1b63e | 345 | |
d48f411c AC |
346 | tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
347 | if (!tps) | |
348 | return -ENOMEM; | |
349 | ||
817bb7fb AC |
350 | i2c_set_clientdata(client, tps); |
351 | tps->dev = &client->dev; | |
352 | tps->id = chip_id; | |
353 | ||
0ef4619c | 354 | tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config); |
d48f411c AC |
355 | if (IS_ERR(tps->regmap)) { |
356 | ret = PTR_ERR(tps->regmap); | |
357 | dev_err(tps->dev, "Failed to allocate register map: %d\n", | |
358 | ret); | |
359 | return ret; | |
360 | } | |
361 | ||
6556bdac MN |
362 | if (client->irq) { |
363 | tps65217_irq_init(tps, client->irq); | |
364 | } else { | |
365 | int i; | |
366 | ||
367 | /* Don't tell children about IRQ resources which won't fire */ | |
368 | for (i = 0; i < ARRAY_SIZE(tps65217s); i++) | |
369 | tps65217s[i].num_resources = 0; | |
370 | } | |
371 | ||
b89b6b6b | 372 | ret = devm_mfd_add_devices(tps->dev, -1, tps65217s, |
6556bdac MN |
373 | ARRAY_SIZE(tps65217s), NULL, 0, |
374 | tps->irq_domain); | |
817bb7fb AC |
375 | if (ret < 0) { |
376 | dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret); | |
377 | return ret; | |
378 | } | |
d48f411c AC |
379 | |
380 | ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version); | |
381 | if (ret < 0) { | |
0ef4619c AL |
382 | dev_err(tps->dev, "Failed to read revision register: %d\n", |
383 | ret); | |
384 | return ret; | |
d48f411c AC |
385 | } |
386 | ||
eb433dad CFP |
387 | /* Set the PMIC to shutdown on PWR_EN toggle */ |
388 | if (status_off) { | |
389 | ret = tps65217_set_bits(tps, TPS65217_REG_STATUS, | |
390 | TPS65217_STATUS_OFF, TPS65217_STATUS_OFF, | |
391 | TPS65217_PROTECT_NONE); | |
392 | if (ret) | |
393 | dev_warn(tps->dev, "unable to set the status OFF\n"); | |
394 | } | |
395 | ||
d48f411c AC |
396 | dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n", |
397 | (version & TPS65217_CHIPID_CHIP_MASK) >> 4, | |
398 | version & TPS65217_CHIPID_REV_MASK); | |
399 | ||
d48f411c | 400 | return 0; |
d48f411c AC |
401 | } |
402 | ||
40a50f8b MK |
403 | static int tps65217_remove(struct i2c_client *client) |
404 | { | |
405 | struct tps65217 *tps = i2c_get_clientdata(client); | |
406 | unsigned int virq; | |
407 | int i; | |
408 | ||
fa917052 | 409 | for (i = 0; i < TPS65217_NUM_IRQ; i++) { |
40a50f8b MK |
410 | virq = irq_find_mapping(tps->irq_domain, i); |
411 | if (virq) | |
412 | irq_dispose_mapping(virq); | |
413 | } | |
414 | ||
415 | irq_domain_remove(tps->irq_domain); | |
416 | tps->irq_domain = NULL; | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
d48f411c | 421 | static const struct i2c_device_id tps65217_id_table[] = { |
817bb7fb AC |
422 | {"tps65217", TPS65217}, |
423 | { /* sentinel */ } | |
d48f411c AC |
424 | }; |
425 | MODULE_DEVICE_TABLE(i2c, tps65217_id_table); | |
426 | ||
427 | static struct i2c_driver tps65217_driver = { | |
428 | .driver = { | |
429 | .name = "tps65217", | |
a351451a | 430 | .of_match_table = tps65217_of_match, |
d48f411c AC |
431 | }, |
432 | .id_table = tps65217_id_table, | |
433 | .probe = tps65217_probe, | |
40a50f8b | 434 | .remove = tps65217_remove, |
d48f411c AC |
435 | }; |
436 | ||
437 | static int __init tps65217_init(void) | |
438 | { | |
439 | return i2c_add_driver(&tps65217_driver); | |
440 | } | |
441 | subsys_initcall(tps65217_init); | |
442 | ||
443 | static void __exit tps65217_exit(void) | |
444 | { | |
445 | i2c_del_driver(&tps65217_driver); | |
446 | } | |
447 | module_exit(tps65217_exit); | |
448 | ||
449 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); | |
450 | MODULE_DESCRIPTION("TPS65217 chip family multi-function driver"); | |
451 | MODULE_LICENSE("GPL v2"); |