1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * tps65910.c -- TI TPS6591x chip family multi-function driver
4 *
5 * Copyright 2010 Texas Instruments Inc.
6 *
7 * Author: Graeme Gregory <gg@slimlogic.co.uk>
8 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
9 */
10
11 #include <linux/init.h>
12 #include <linux/err.h>
13 #include <linux/slab.h>
14 #include <linux/i2c.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/irqdomain.h>
18 #include <linux/mfd/core.h>
19 #include <linux/regmap.h>
20 #include <linux/mfd/tps65910.h>
21 #include <linux/of.h>
22 #include <linux/of_device.h>
23
24 static struct resource rtc_resources[] = {
25 {
26 .start = TPS65910_IRQ_RTC_ALARM,
27 .end = TPS65910_IRQ_RTC_ALARM,
28 .flags = IORESOURCE_IRQ,
29 }
30 };
31
32 static const struct mfd_cell tps65910s[] = {
33 {
34 .name = "tps65910-gpio",
35 },
36 {
37 .name = "tps65910-pmic",
38 },
39 {
40 .name = "tps65910-rtc",
41 .num_resources = ARRAY_SIZE(rtc_resources),
42 .resources = &rtc_resources[0],
43 },
44 {
45 .name = "tps65910-power",
46 },
47 };
48
49
50 static const struct regmap_irq tps65911_irqs[] = {
51 /* INT_STS */
52 [TPS65911_IRQ_PWRHOLD_F] = {
53 .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
54 .reg_offset = 0,
55 },
56 [TPS65911_IRQ_VBAT_VMHI] = {
57 .mask = INT_MSK_VMBHI_IT_MSK_MASK,
58 .reg_offset = 0,
59 },
60 [TPS65911_IRQ_PWRON] = {
61 .mask = INT_MSK_PWRON_IT_MSK_MASK,
62 .reg_offset = 0,
63 },
64 [TPS65911_IRQ_PWRON_LP] = {
65 .mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
66 .reg_offset = 0,
67 },
68 [TPS65911_IRQ_PWRHOLD_R] = {
69 .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
70 .reg_offset = 0,
71 },
72 [TPS65911_IRQ_HOTDIE] = {
73 .mask = INT_MSK_HOTDIE_IT_MSK_MASK,
74 .reg_offset = 0,
75 },
76 [TPS65911_IRQ_RTC_ALARM] = {
77 .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
78 .reg_offset = 0,
79 },
80 [TPS65911_IRQ_RTC_PERIOD] = {
81 .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
82 .reg_offset = 0,
83 },
84
85 /* INT_STS2 */
86 [TPS65911_IRQ_GPIO0_R] = {
87 .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
88 .reg_offset = 1,
89 },
90 [TPS65911_IRQ_GPIO0_F] = {
91 .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
92 .reg_offset = 1,
93 },
94 [TPS65911_IRQ_GPIO1_R] = {
95 .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
96 .reg_offset = 1,
97 },
98 [TPS65911_IRQ_GPIO1_F] = {
99 .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
100 .reg_offset = 1,
101 },
102 [TPS65911_IRQ_GPIO2_R] = {
103 .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
104 .reg_offset = 1,
105 },
106 [TPS65911_IRQ_GPIO2_F] = {
107 .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
108 .reg_offset = 1,
109 },
110 [TPS65911_IRQ_GPIO3_R] = {
111 .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
112 .reg_offset = 1,
113 },
114 [TPS65911_IRQ_GPIO3_F] = {
115 .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
116 .reg_offset = 1,
117 },
118
119 /* INT_STS2 */
120 [TPS65911_IRQ_GPIO4_R] = {
121 .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
122 .reg_offset = 2,
123 },
124 [TPS65911_IRQ_GPIO4_F] = {
125 .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
126 .reg_offset = 2,
127 },
128 [TPS65911_IRQ_GPIO5_R] = {
129 .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
130 .reg_offset = 2,
131 },
132 [TPS65911_IRQ_GPIO5_F] = {
133 .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
134 .reg_offset = 2,
135 },
136 [TPS65911_IRQ_WTCHDG] = {
137 .mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
138 .reg_offset = 2,
139 },
140 [TPS65911_IRQ_VMBCH2_H] = {
141 .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
142 .reg_offset = 2,
143 },
144 [TPS65911_IRQ_VMBCH2_L] = {
145 .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
146 .reg_offset = 2,
147 },
148 [TPS65911_IRQ_PWRDN] = {
149 .mask = INT_MSK3_PWRDN_IT_MSK_MASK,
150 .reg_offset = 2,
151 },
152 };
153
154 static const struct regmap_irq tps65910_irqs[] = {
155 /* INT_STS */
156 [TPS65910_IRQ_VBAT_VMBDCH] = {
157 .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
158 .reg_offset = 0,
159 },
160 [TPS65910_IRQ_VBAT_VMHI] = {
161 .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
162 .reg_offset = 0,
163 },
164 [TPS65910_IRQ_PWRON] = {
165 .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
166 .reg_offset = 0,
167 },
168 [TPS65910_IRQ_PWRON_LP] = {
169 .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
170 .reg_offset = 0,
171 },
172 [TPS65910_IRQ_PWRHOLD] = {
173 .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
174 .reg_offset = 0,
175 },
176 [TPS65910_IRQ_HOTDIE] = {
177 .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
178 .reg_offset = 0,
179 },
180 [TPS65910_IRQ_RTC_ALARM] = {
181 .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
182 .reg_offset = 0,
183 },
184 [TPS65910_IRQ_RTC_PERIOD] = {
185 .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
186 .reg_offset = 0,
187 },
188
189 /* INT_STS2 */
190 [TPS65910_IRQ_GPIO_R] = {
191 .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
192 .reg_offset = 1,
193 },
194 [TPS65910_IRQ_GPIO_F] = {
195 .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
196 .reg_offset = 1,
197 },
198 };
199
200 static struct regmap_irq_chip tps65911_irq_chip = {
201 .name = "tps65910",
202 .irqs = tps65911_irqs,
203 .num_irqs = ARRAY_SIZE(tps65911_irqs),
204 .num_regs = 3,
205 .irq_reg_stride = 2,
206 .status_base = TPS65910_INT_STS,
207 .mask_base = TPS65910_INT_MSK,
208 .ack_base = TPS65910_INT_STS,
209 };
210
211 static struct regmap_irq_chip tps65910_irq_chip = {
212 .name = "tps65910",
213 .irqs = tps65910_irqs,
214 .num_irqs = ARRAY_SIZE(tps65910_irqs),
215 .num_regs = 2,
216 .irq_reg_stride = 2,
217 .status_base = TPS65910_INT_STS,
218 .mask_base = TPS65910_INT_MSK,
219 .ack_base = TPS65910_INT_STS,
220 };
221
tps65910_irq_init(struct tps65910 * tps65910,int irq,struct tps65910_platform_data * pdata)222 static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
223 struct tps65910_platform_data *pdata)
224 {
225 int ret;
226 static struct regmap_irq_chip *tps6591x_irqs_chip;
227
228 if (!irq) {
229 dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
230 return -EINVAL;
231 }
232
233 if (!pdata) {
234 dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
235 return -EINVAL;
236 }
237
238 switch (tps65910_chip_id(tps65910)) {
239 case TPS65910:
240 tps6591x_irqs_chip = &tps65910_irq_chip;
241 break;
242 case TPS65911:
243 tps6591x_irqs_chip = &tps65911_irq_chip;
244 break;
245 }
246
247 tps65910->chip_irq = irq;
248 ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
249 tps65910->chip_irq,
250 IRQF_ONESHOT, pdata->irq_base,
251 tps6591x_irqs_chip, &tps65910->irq_data);
252 if (ret < 0) {
253 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
254 tps65910->chip_irq = 0;
255 }
256 return ret;
257 }
258
is_volatile_reg(struct device * dev,unsigned int reg)259 static bool is_volatile_reg(struct device *dev, unsigned int reg)
260 {
261 struct tps65910 *tps65910 = dev_get_drvdata(dev);
262
263 /*
264 * Caching all regulator registers.
265 * All regualator register address range is same for
266 * TPS65910 and TPS65911
267 */
268 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
269 /* Check for non-existing register */
270 if (tps65910_chip_id(tps65910) == TPS65910)
271 if ((reg == TPS65911_VDDCTRL_OP) ||
272 (reg == TPS65911_VDDCTRL_SR))
273 return true;
274 return false;
275 }
276 return true;
277 }
278
279 static const struct regmap_config tps65910_regmap_config = {
280 .reg_bits = 8,
281 .val_bits = 8,
282 .volatile_reg = is_volatile_reg,
283 .max_register = TPS65910_MAX_REGISTER - 1,
284 .cache_type = REGCACHE_RBTREE,
285 };
286
tps65910_ck32k_init(struct tps65910 * tps65910,struct tps65910_board * pmic_pdata)287 static int tps65910_ck32k_init(struct tps65910 *tps65910,
288 struct tps65910_board *pmic_pdata)
289 {
290 int ret;
291
292 if (!pmic_pdata->en_ck32k_xtal)
293 return 0;
294
295 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
296 DEVCTRL_CK32K_CTRL_MASK);
297 if (ret < 0) {
298 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
299 return ret;
300 }
301
302 return 0;
303 }
304
tps65910_sleepinit(struct tps65910 * tps65910,struct tps65910_board * pmic_pdata)305 static int tps65910_sleepinit(struct tps65910 *tps65910,
306 struct tps65910_board *pmic_pdata)
307 {
308 struct device *dev;
309 int ret;
310
311 if (!pmic_pdata->en_dev_slp)
312 return 0;
313
314 dev = tps65910->dev;
315
316 /* enabling SLEEP device state */
317 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
318 DEVCTRL_DEV_SLP_MASK);
319 if (ret < 0) {
320 dev_err(dev, "set dev_slp failed: %d\n", ret);
321 goto err_sleep_init;
322 }
323
324 if (pmic_pdata->slp_keepon.therm_keepon) {
325 ret = tps65910_reg_set_bits(tps65910,
326 TPS65910_SLEEP_KEEP_RES_ON,
327 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
328 if (ret < 0) {
329 dev_err(dev, "set therm_keepon failed: %d\n", ret);
330 goto disable_dev_slp;
331 }
332 }
333
334 if (pmic_pdata->slp_keepon.clkout32k_keepon) {
335 ret = tps65910_reg_set_bits(tps65910,
336 TPS65910_SLEEP_KEEP_RES_ON,
337 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
338 if (ret < 0) {
339 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
340 goto disable_dev_slp;
341 }
342 }
343
344 if (pmic_pdata->slp_keepon.i2chs_keepon) {
345 ret = tps65910_reg_set_bits(tps65910,
346 TPS65910_SLEEP_KEEP_RES_ON,
347 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
348 if (ret < 0) {
349 dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
350 goto disable_dev_slp;
351 }
352 }
353
354 return 0;
355
356 disable_dev_slp:
357 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
358 DEVCTRL_DEV_SLP_MASK);
359
360 err_sleep_init:
361 return ret;
362 }
363
364 #ifdef CONFIG_OF
365 static const struct of_device_id tps65910_of_match[] = {
366 { .compatible = "ti,tps65910", .data = (void *)TPS65910},
367 { .compatible = "ti,tps65911", .data = (void *)TPS65911},
368 { },
369 };
370
tps65910_parse_dt(struct i2c_client * client,unsigned long * chip_id)371 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
372 unsigned long *chip_id)
373 {
374 struct device_node *np = client->dev.of_node;
375 struct tps65910_board *board_info;
376 unsigned int prop;
377 const struct of_device_id *match;
378 int ret;
379
380 match = of_match_device(tps65910_of_match, &client->dev);
381 if (!match) {
382 dev_err(&client->dev, "Failed to find matching dt id\n");
383 return NULL;
384 }
385
386 *chip_id = (unsigned long)match->data;
387
388 board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
389 GFP_KERNEL);
390 if (!board_info)
391 return NULL;
392
393 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
394 if (!ret)
395 board_info->vmbch_threshold = prop;
396
397 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
398 if (!ret)
399 board_info->vmbch2_threshold = prop;
400
401 prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
402 board_info->en_ck32k_xtal = prop;
403
404 prop = of_property_read_bool(np, "ti,sleep-enable");
405 board_info->en_dev_slp = prop;
406
407 prop = of_property_read_bool(np, "ti,sleep-keep-therm");
408 board_info->slp_keepon.therm_keepon = prop;
409
410 prop = of_property_read_bool(np, "ti,sleep-keep-ck32k");
411 board_info->slp_keepon.clkout32k_keepon = prop;
412
413 prop = of_property_read_bool(np, "ti,sleep-keep-hsclk");
414 board_info->slp_keepon.i2chs_keepon = prop;
415
416 board_info->irq = client->irq;
417 board_info->irq_base = -1;
418 board_info->pm_off = of_property_read_bool(np,
419 "ti,system-power-controller");
420
421 return board_info;
422 }
423 #else
424 static inline
tps65910_parse_dt(struct i2c_client * client,unsigned long * chip_id)425 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
426 unsigned long *chip_id)
427 {
428 return NULL;
429 }
430 #endif
431
432 static struct i2c_client *tps65910_i2c_client;
tps65910_power_off(void)433 static void tps65910_power_off(void)
434 {
435 struct tps65910 *tps65910;
436
437 tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
438
439 if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
440 DEVCTRL_PWR_OFF_MASK) < 0)
441 return;
442
443 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
444 DEVCTRL_DEV_ON_MASK);
445 }
446
tps65910_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)447 static int tps65910_i2c_probe(struct i2c_client *i2c,
448 const struct i2c_device_id *id)
449 {
450 struct tps65910 *tps65910;
451 struct tps65910_board *pmic_plat_data;
452 struct tps65910_board *of_pmic_plat_data = NULL;
453 struct tps65910_platform_data *init_data;
454 unsigned long chip_id = id->driver_data;
455 int ret;
456
457 pmic_plat_data = dev_get_platdata(&i2c->dev);
458
459 if (!pmic_plat_data && i2c->dev.of_node) {
460 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
461 of_pmic_plat_data = pmic_plat_data;
462 }
463
464 if (!pmic_plat_data)
465 return -EINVAL;
466
467 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
468 if (init_data == NULL)
469 return -ENOMEM;
470
471 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
472 if (tps65910 == NULL)
473 return -ENOMEM;
474
475 tps65910->of_plat_data = of_pmic_plat_data;
476 i2c_set_clientdata(i2c, tps65910);
477 tps65910->dev = &i2c->dev;
478 tps65910->i2c_client = i2c;
479 tps65910->id = chip_id;
480
481 /* Work around silicon erratum SWCZ010: the tps65910 may miss the
482 * first I2C transfer. So issue a dummy transfer before the first
483 * real transfer.
484 */
485 i2c_master_send(i2c, "", 1);
486 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
487 if (IS_ERR(tps65910->regmap)) {
488 ret = PTR_ERR(tps65910->regmap);
489 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
490 return ret;
491 }
492
493 init_data->irq = pmic_plat_data->irq;
494 init_data->irq_base = pmic_plat_data->irq_base;
495
496 tps65910_irq_init(tps65910, init_data->irq, init_data);
497 tps65910_ck32k_init(tps65910, pmic_plat_data);
498 tps65910_sleepinit(tps65910, pmic_plat_data);
499
500 if (pmic_plat_data->pm_off && !pm_power_off) {
501 tps65910_i2c_client = i2c;
502 pm_power_off = tps65910_power_off;
503 }
504
505 ret = devm_mfd_add_devices(tps65910->dev, -1,
506 tps65910s, ARRAY_SIZE(tps65910s),
507 NULL, 0,
508 regmap_irq_get_domain(tps65910->irq_data));
509 if (ret < 0) {
510 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
511 return ret;
512 }
513
514 return ret;
515 }
516
517 static const struct i2c_device_id tps65910_i2c_id[] = {
518 { "tps65910", TPS65910 },
519 { "tps65911", TPS65911 },
520 { }
521 };
522
523 static struct i2c_driver tps65910_i2c_driver = {
524 .driver = {
525 .name = "tps65910",
526 .of_match_table = of_match_ptr(tps65910_of_match),
527 },
528 .probe = tps65910_i2c_probe,
529 .id_table = tps65910_i2c_id,
530 };
531
tps65910_i2c_init(void)532 static int __init tps65910_i2c_init(void)
533 {
534 return i2c_add_driver(&tps65910_i2c_driver);
535 }
536 /* init early so consumer devices can complete system boot */
537 subsys_initcall(tps65910_i2c_init);
538
