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>
19 #include <linux/err.h>
20 #include <linux/slab.h>
21 #include <linux/i2c.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/irqdomain.h>
25 #include <linux/mfd/core.h>
26 #include <linux/regmap.h>
27 #include <linux/mfd/tps65910.h>
28 #include <linux/of.h>
29 #include <linux/of_device.h>
30
31 static struct resource rtc_resources[] = {
32 {
33 .start = TPS65910_IRQ_RTC_ALARM,
34 .end = TPS65910_IRQ_RTC_ALARM,
35 .flags = IORESOURCE_IRQ,
36 }
37 };
38
39 static const struct mfd_cell tps65910s[] = {
40 {
41 .name = "tps65910-gpio",
42 },
43 {
44 .name = "tps65910-pmic",
45 },
46 {
47 .name = "tps65910-rtc",
48 .num_resources = ARRAY_SIZE(rtc_resources),
49 .resources = &rtc_resources[0],
50 },
51 {
52 .name = "tps65910-power",
53 },
54 };
55
56
57 static const struct regmap_irq tps65911_irqs[] = {
58 /* INT_STS */
59 [TPS65911_IRQ_PWRHOLD_F] = {
60 .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
61 .reg_offset = 0,
62 },
63 [TPS65911_IRQ_VBAT_VMHI] = {
64 .mask = INT_MSK_VMBHI_IT_MSK_MASK,
65 .reg_offset = 0,
66 },
67 [TPS65911_IRQ_PWRON] = {
68 .mask = INT_MSK_PWRON_IT_MSK_MASK,
69 .reg_offset = 0,
70 },
71 [TPS65911_IRQ_PWRON_LP] = {
72 .mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
73 .reg_offset = 0,
74 },
75 [TPS65911_IRQ_PWRHOLD_R] = {
76 .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
77 .reg_offset = 0,
78 },
79 [TPS65911_IRQ_HOTDIE] = {
80 .mask = INT_MSK_HOTDIE_IT_MSK_MASK,
81 .reg_offset = 0,
82 },
83 [TPS65911_IRQ_RTC_ALARM] = {
84 .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
85 .reg_offset = 0,
86 },
87 [TPS65911_IRQ_RTC_PERIOD] = {
88 .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
89 .reg_offset = 0,
90 },
91
92 /* INT_STS2 */
93 [TPS65911_IRQ_GPIO0_R] = {
94 .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
95 .reg_offset = 1,
96 },
97 [TPS65911_IRQ_GPIO0_F] = {
98 .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
99 .reg_offset = 1,
100 },
101 [TPS65911_IRQ_GPIO1_R] = {
102 .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
103 .reg_offset = 1,
104 },
105 [TPS65911_IRQ_GPIO1_F] = {
106 .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
107 .reg_offset = 1,
108 },
109 [TPS65911_IRQ_GPIO2_R] = {
110 .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
111 .reg_offset = 1,
112 },
113 [TPS65911_IRQ_GPIO2_F] = {
114 .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
115 .reg_offset = 1,
116 },
117 [TPS65911_IRQ_GPIO3_R] = {
118 .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
119 .reg_offset = 1,
120 },
121 [TPS65911_IRQ_GPIO3_F] = {
122 .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
123 .reg_offset = 1,
124 },
125
126 /* INT_STS2 */
127 [TPS65911_IRQ_GPIO4_R] = {
128 .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
129 .reg_offset = 2,
130 },
131 [TPS65911_IRQ_GPIO4_F] = {
132 .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
133 .reg_offset = 2,
134 },
135 [TPS65911_IRQ_GPIO5_R] = {
136 .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
137 .reg_offset = 2,
138 },
139 [TPS65911_IRQ_GPIO5_F] = {
140 .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
141 .reg_offset = 2,
142 },
143 [TPS65911_IRQ_WTCHDG] = {
144 .mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
145 .reg_offset = 2,
146 },
147 [TPS65911_IRQ_VMBCH2_H] = {
148 .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
149 .reg_offset = 2,
150 },
151 [TPS65911_IRQ_VMBCH2_L] = {
152 .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
153 .reg_offset = 2,
154 },
155 [TPS65911_IRQ_PWRDN] = {
156 .mask = INT_MSK3_PWRDN_IT_MSK_MASK,
157 .reg_offset = 2,
158 },
159 };
160
161 static const struct regmap_irq tps65910_irqs[] = {
162 /* INT_STS */
163 [TPS65910_IRQ_VBAT_VMBDCH] = {
164 .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
165 .reg_offset = 0,
166 },
167 [TPS65910_IRQ_VBAT_VMHI] = {
168 .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
169 .reg_offset = 0,
170 },
171 [TPS65910_IRQ_PWRON] = {
172 .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
173 .reg_offset = 0,
174 },
175 [TPS65910_IRQ_PWRON_LP] = {
176 .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
177 .reg_offset = 0,
178 },
179 [TPS65910_IRQ_PWRHOLD] = {
180 .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
181 .reg_offset = 0,
182 },
183 [TPS65910_IRQ_HOTDIE] = {
184 .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
185 .reg_offset = 0,
186 },
187 [TPS65910_IRQ_RTC_ALARM] = {
188 .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
189 .reg_offset = 0,
190 },
191 [TPS65910_IRQ_RTC_PERIOD] = {
192 .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
193 .reg_offset = 0,
194 },
195
196 /* INT_STS2 */
197 [TPS65910_IRQ_GPIO_R] = {
198 .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
199 .reg_offset = 1,
200 },
201 [TPS65910_IRQ_GPIO_F] = {
202 .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
203 .reg_offset = 1,
204 },
205 };
206
207 static struct regmap_irq_chip tps65911_irq_chip = {
208 .name = "tps65910",
209 .irqs = tps65911_irqs,
210 .num_irqs = ARRAY_SIZE(tps65911_irqs),
211 .num_regs = 3,
212 .irq_reg_stride = 2,
213 .status_base = TPS65910_INT_STS,
214 .mask_base = TPS65910_INT_MSK,
215 .ack_base = TPS65910_INT_STS,
216 };
217
218 static struct regmap_irq_chip tps65910_irq_chip = {
219 .name = "tps65910",
220 .irqs = tps65910_irqs,
221 .num_irqs = ARRAY_SIZE(tps65910_irqs),
222 .num_regs = 2,
223 .irq_reg_stride = 2,
224 .status_base = TPS65910_INT_STS,
225 .mask_base = TPS65910_INT_MSK,
226 .ack_base = TPS65910_INT_STS,
227 };
228
tps65910_irq_init(struct tps65910 * tps65910,int irq,struct tps65910_platform_data * pdata)229 static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
230 struct tps65910_platform_data *pdata)
231 {
232 int ret;
233 static struct regmap_irq_chip *tps6591x_irqs_chip;
234
235 if (!irq) {
236 dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
237 return -EINVAL;
238 }
239
240 if (!pdata) {
241 dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
242 return -EINVAL;
243 }
244
245 switch (tps65910_chip_id(tps65910)) {
246 case TPS65910:
247 tps6591x_irqs_chip = &tps65910_irq_chip;
248 break;
249 case TPS65911:
250 tps6591x_irqs_chip = &tps65911_irq_chip;
251 break;
252 }
253
254 tps65910->chip_irq = irq;
255 ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
256 tps65910->chip_irq,
257 IRQF_ONESHOT, pdata->irq_base,
258 tps6591x_irqs_chip, &tps65910->irq_data);
259 if (ret < 0) {
260 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
261 tps65910->chip_irq = 0;
262 }
263 return ret;
264 }
265
is_volatile_reg(struct device * dev,unsigned int reg)266 static bool is_volatile_reg(struct device *dev, unsigned int reg)
267 {
268 struct tps65910 *tps65910 = dev_get_drvdata(dev);
269
270 /*
271 * Caching all regulator registers.
272 * All regualator register address range is same for
273 * TPS65910 and TPS65911
274 */
275 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
276 /* Check for non-existing register */
277 if (tps65910_chip_id(tps65910) == TPS65910)
278 if ((reg == TPS65911_VDDCTRL_OP) ||
279 (reg == TPS65911_VDDCTRL_SR))
280 return true;
281 return false;
282 }
283 return true;
284 }
285
286 static const struct regmap_config tps65910_regmap_config = {
287 .reg_bits = 8,
288 .val_bits = 8,
289 .volatile_reg = is_volatile_reg,
290 .max_register = TPS65910_MAX_REGISTER - 1,
291 .cache_type = REGCACHE_RBTREE,
292 };
293
tps65910_ck32k_init(struct tps65910 * tps65910,struct tps65910_board * pmic_pdata)294 static int tps65910_ck32k_init(struct tps65910 *tps65910,
295 struct tps65910_board *pmic_pdata)
296 {
297 int ret;
298
299 if (!pmic_pdata->en_ck32k_xtal)
300 return 0;
301
302 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
303 DEVCTRL_CK32K_CTRL_MASK);
304 if (ret < 0) {
305 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
306 return ret;
307 }
308
309 return 0;
310 }
311
tps65910_sleepinit(struct tps65910 * tps65910,struct tps65910_board * pmic_pdata)312 static int tps65910_sleepinit(struct tps65910 *tps65910,
313 struct tps65910_board *pmic_pdata)
314 {
315 struct device *dev;
316 int ret;
317
318 if (!pmic_pdata->en_dev_slp)
319 return 0;
320
321 dev = tps65910->dev;
322
323 /* enabling SLEEP device state */
324 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
325 DEVCTRL_DEV_SLP_MASK);
326 if (ret < 0) {
327 dev_err(dev, "set dev_slp failed: %d\n", ret);
328 goto err_sleep_init;
329 }
330
331 if (pmic_pdata->slp_keepon.therm_keepon) {
332 ret = tps65910_reg_set_bits(tps65910,
333 TPS65910_SLEEP_KEEP_RES_ON,
334 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
335 if (ret < 0) {
336 dev_err(dev, "set therm_keepon failed: %d\n", ret);
337 goto disable_dev_slp;
338 }
339 }
340
341 if (pmic_pdata->slp_keepon.clkout32k_keepon) {
342 ret = tps65910_reg_set_bits(tps65910,
343 TPS65910_SLEEP_KEEP_RES_ON,
344 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
345 if (ret < 0) {
346 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
347 goto disable_dev_slp;
348 }
349 }
350
351 if (pmic_pdata->slp_keepon.i2chs_keepon) {
352 ret = tps65910_reg_set_bits(tps65910,
353 TPS65910_SLEEP_KEEP_RES_ON,
354 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
355 if (ret < 0) {
356 dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
357 goto disable_dev_slp;
358 }
359 }
360
361 return 0;
362
363 disable_dev_slp:
364 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
365 DEVCTRL_DEV_SLP_MASK);
366
367 err_sleep_init:
368 return ret;
369 }
370
371 #ifdef CONFIG_OF
372 static const struct of_device_id tps65910_of_match[] = {
373 { .compatible = "ti,tps65910", .data = (void *)TPS65910},
374 { .compatible = "ti,tps65911", .data = (void *)TPS65911},
375 { },
376 };
377 MODULE_DEVICE_TABLE(of, tps65910_of_match);
378
tps65910_parse_dt(struct i2c_client * client,unsigned long * chip_id)379 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
380 unsigned long *chip_id)
381 {
382 struct device_node *np = client->dev.of_node;
383 struct tps65910_board *board_info;
384 unsigned int prop;
385 const struct of_device_id *match;
386 int ret;
387
388 match = of_match_device(tps65910_of_match, &client->dev);
389 if (!match) {
390 dev_err(&client->dev, "Failed to find matching dt id\n");
391 return NULL;
392 }
393
394 *chip_id = (unsigned long)match->data;
395
396 board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
397 GFP_KERNEL);
398 if (!board_info)
399 return NULL;
400
401 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
402 if (!ret)
403 board_info->vmbch_threshold = prop;
404
405 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
406 if (!ret)
407 board_info->vmbch2_threshold = prop;
408
409 prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
410 board_info->en_ck32k_xtal = prop;
411
412 prop = of_property_read_bool(np, "ti,sleep-enable");
413 board_info->en_dev_slp = prop;
414
415 prop = of_property_read_bool(np, "ti,sleep-keep-therm");
416 board_info->slp_keepon.therm_keepon = prop;
417
418 prop = of_property_read_bool(np, "ti,sleep-keep-ck32k");
419 board_info->slp_keepon.clkout32k_keepon = prop;
420
421 prop = of_property_read_bool(np, "ti,sleep-keep-hsclk");
422 board_info->slp_keepon.i2chs_keepon = prop;
423
424 board_info->irq = client->irq;
425 board_info->irq_base = -1;
426 board_info->pm_off = of_property_read_bool(np,
427 "ti,system-power-controller");
428
429 return board_info;
430 }
431 #else
432 static inline
tps65910_parse_dt(struct i2c_client * client,unsigned long * chip_id)433 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
434 unsigned long *chip_id)
435 {
436 return NULL;
437 }
438 #endif
439
440 static struct i2c_client *tps65910_i2c_client;
tps65910_power_off(void)441 static void tps65910_power_off(void)
442 {
443 struct tps65910 *tps65910;
444
445 tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
446
447 if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
448 DEVCTRL_PWR_OFF_MASK) < 0)
449 return;
450
451 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
452 DEVCTRL_DEV_ON_MASK);
453 }
454
tps65910_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)455 static int tps65910_i2c_probe(struct i2c_client *i2c,
456 const struct i2c_device_id *id)
457 {
458 struct tps65910 *tps65910;
459 struct tps65910_board *pmic_plat_data;
460 struct tps65910_board *of_pmic_plat_data = NULL;
461 struct tps65910_platform_data *init_data;
462 unsigned long chip_id = id->driver_data;
463 int ret;
464
465 pmic_plat_data = dev_get_platdata(&i2c->dev);
466
467 if (!pmic_plat_data && i2c->dev.of_node) {
468 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
469 of_pmic_plat_data = pmic_plat_data;
470 }
471
472 if (!pmic_plat_data)
473 return -EINVAL;
474
475 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
476 if (init_data == NULL)
477 return -ENOMEM;
478
479 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
480 if (tps65910 == NULL)
481 return -ENOMEM;
482
483 tps65910->of_plat_data = of_pmic_plat_data;
484 i2c_set_clientdata(i2c, tps65910);
485 tps65910->dev = &i2c->dev;
486 tps65910->i2c_client = i2c;
487 tps65910->id = chip_id;
488
489 /* Work around silicon erratum SWCZ010: the tps65910 may miss the
490 * first I2C transfer. So issue a dummy transfer before the first
491 * real transfer.
492 */
493 i2c_master_send(i2c, "", 1);
494 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
495 if (IS_ERR(tps65910->regmap)) {
496 ret = PTR_ERR(tps65910->regmap);
497 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
498 return ret;
499 }
500
501 init_data->irq = pmic_plat_data->irq;
502 init_data->irq_base = pmic_plat_data->irq_base;
503
504 tps65910_irq_init(tps65910, init_data->irq, init_data);
505 tps65910_ck32k_init(tps65910, pmic_plat_data);
506 tps65910_sleepinit(tps65910, pmic_plat_data);
507
508 if (pmic_plat_data->pm_off && !pm_power_off) {
509 tps65910_i2c_client = i2c;
510 pm_power_off = tps65910_power_off;
511 }
512
513 ret = devm_mfd_add_devices(tps65910->dev, -1,
514 tps65910s, ARRAY_SIZE(tps65910s),
515 NULL, 0,
516 regmap_irq_get_domain(tps65910->irq_data));
517 if (ret < 0) {
518 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
519 return ret;
520 }
521
522 return ret;
523 }
524
525 static const struct i2c_device_id tps65910_i2c_id[] = {
526 { "tps65910", TPS65910 },
527 { "tps65911", TPS65911 },
528 { }
529 };
530 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
531
532
533 static struct i2c_driver tps65910_i2c_driver = {
534 .driver = {
535 .name = "tps65910",
536 .of_match_table = of_match_ptr(tps65910_of_match),
537 },
538 .probe = tps65910_i2c_probe,
539 .id_table = tps65910_i2c_id,
540 };
541
tps65910_i2c_init(void)542 static int __init tps65910_i2c_init(void)
543 {
544 return i2c_add_driver(&tps65910_i2c_driver);
545 }
546 /* init early so consumer devices can complete system boot */
547 subsys_initcall(tps65910_i2c_init);
548
tps65910_i2c_exit(void)549 static void __exit tps65910_i2c_exit(void)
550 {
551 i2c_del_driver(&tps65910_i2c_driver);
552 }
553 module_exit(tps65910_i2c_exit);
554
555 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
556 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
557 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
558 MODULE_LICENSE("GPL");
559
