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/property.h> |
23 | |
24 | static const 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 | |
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(dev: tps65910->dev, map: tps65910->regmap, |
249 | irq: tps65910->chip_irq, |
250 | IRQF_ONESHOT, irq_base: pdata->irq_base, |
251 | chip: tps6591x_irqs_chip, data: &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 | |
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_MAPLE, |
285 | }; |
286 | |
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 = regmap_clear_bits(map: tps65910->regmap, 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 | |
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 = regmap_set_bits(map: tps65910->regmap, 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 = regmap_set_bits(map: tps65910->regmap, |
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 = regmap_set_bits(map: tps65910->regmap, |
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 = regmap_set_bits(map: tps65910->regmap, |
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 | regmap_clear_bits(map: tps65910->regmap, 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 | |
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 | int ret; |
378 | |
379 | *chip_id = (unsigned long)device_get_match_data(dev: &client->dev); |
380 | |
381 | board_info = devm_kzalloc(dev: &client->dev, size: sizeof(*board_info), |
382 | GFP_KERNEL); |
383 | if (!board_info) |
384 | return NULL; |
385 | |
386 | ret = of_property_read_u32(np, propname: "ti,vmbch-threshold" , out_value: &prop); |
387 | if (!ret) |
388 | board_info->vmbch_threshold = prop; |
389 | |
390 | ret = of_property_read_u32(np, propname: "ti,vmbch2-threshold" , out_value: &prop); |
391 | if (!ret) |
392 | board_info->vmbch2_threshold = prop; |
393 | |
394 | prop = of_property_read_bool(np, propname: "ti,en-ck32k-xtal" ); |
395 | board_info->en_ck32k_xtal = prop; |
396 | |
397 | prop = of_property_read_bool(np, propname: "ti,sleep-enable" ); |
398 | board_info->en_dev_slp = prop; |
399 | |
400 | prop = of_property_read_bool(np, propname: "ti,sleep-keep-therm" ); |
401 | board_info->slp_keepon.therm_keepon = prop; |
402 | |
403 | prop = of_property_read_bool(np, propname: "ti,sleep-keep-ck32k" ); |
404 | board_info->slp_keepon.clkout32k_keepon = prop; |
405 | |
406 | prop = of_property_read_bool(np, propname: "ti,sleep-keep-hsclk" ); |
407 | board_info->slp_keepon.i2chs_keepon = prop; |
408 | |
409 | board_info->irq = client->irq; |
410 | board_info->irq_base = -1; |
411 | board_info->pm_off = of_property_read_bool(np, |
412 | propname: "ti,system-power-controller" ); |
413 | |
414 | return board_info; |
415 | } |
416 | #else |
417 | static inline |
418 | struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, |
419 | unsigned long *chip_id) |
420 | { |
421 | return NULL; |
422 | } |
423 | #endif |
424 | |
425 | static struct i2c_client *tps65910_i2c_client; |
426 | static void tps65910_power_off(void) |
427 | { |
428 | struct tps65910 *tps65910; |
429 | |
430 | tps65910 = dev_get_drvdata(dev: &tps65910_i2c_client->dev); |
431 | |
432 | regmap_update_bits(map: tps65910->regmap, TPS65910_DEVCTRL, |
433 | DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK, |
434 | DEVCTRL_DEV_OFF_MASK); |
435 | } |
436 | |
437 | static int tps65910_i2c_probe(struct i2c_client *i2c) |
438 | { |
439 | const struct i2c_device_id *id = i2c_client_get_device_id(client: i2c); |
440 | struct tps65910 *tps65910; |
441 | struct tps65910_board *pmic_plat_data; |
442 | struct tps65910_board *of_pmic_plat_data = NULL; |
443 | struct tps65910_platform_data *init_data; |
444 | unsigned long chip_id = id->driver_data; |
445 | int ret; |
446 | |
447 | pmic_plat_data = dev_get_platdata(dev: &i2c->dev); |
448 | |
449 | if (!pmic_plat_data && i2c->dev.of_node) { |
450 | pmic_plat_data = tps65910_parse_dt(client: i2c, chip_id: &chip_id); |
451 | of_pmic_plat_data = pmic_plat_data; |
452 | } |
453 | |
454 | if (!pmic_plat_data) |
455 | return -EINVAL; |
456 | |
457 | init_data = devm_kzalloc(dev: &i2c->dev, size: sizeof(*init_data), GFP_KERNEL); |
458 | if (init_data == NULL) |
459 | return -ENOMEM; |
460 | |
461 | tps65910 = devm_kzalloc(dev: &i2c->dev, size: sizeof(*tps65910), GFP_KERNEL); |
462 | if (tps65910 == NULL) |
463 | return -ENOMEM; |
464 | |
465 | tps65910->of_plat_data = of_pmic_plat_data; |
466 | i2c_set_clientdata(client: i2c, data: tps65910); |
467 | tps65910->dev = &i2c->dev; |
468 | tps65910->i2c_client = i2c; |
469 | tps65910->id = chip_id; |
470 | |
471 | /* Work around silicon erratum SWCZ010: the tps65910 may miss the |
472 | * first I2C transfer. So issue a dummy transfer before the first |
473 | * real transfer. |
474 | */ |
475 | i2c_master_send(client: i2c, buf: "" , count: 1); |
476 | tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); |
477 | if (IS_ERR(ptr: tps65910->regmap)) { |
478 | ret = PTR_ERR(ptr: tps65910->regmap); |
479 | dev_err(&i2c->dev, "regmap initialization failed: %d\n" , ret); |
480 | return ret; |
481 | } |
482 | |
483 | init_data->irq = pmic_plat_data->irq; |
484 | init_data->irq_base = pmic_plat_data->irq_base; |
485 | |
486 | tps65910_irq_init(tps65910, irq: init_data->irq, pdata: init_data); |
487 | tps65910_ck32k_init(tps65910, pmic_pdata: pmic_plat_data); |
488 | tps65910_sleepinit(tps65910, pmic_pdata: pmic_plat_data); |
489 | |
490 | if (pmic_plat_data->pm_off && !pm_power_off) { |
491 | /* |
492 | * The PWR_OFF bit needs to be set separately, before |
493 | * transitioning to the OFF state. It enables the "sequential" |
494 | * power-off mode on TPS65911, it's a NO-OP on TPS65910. |
495 | */ |
496 | ret = regmap_set_bits(map: tps65910->regmap, TPS65910_DEVCTRL, |
497 | DEVCTRL_PWR_OFF_MASK); |
498 | if (ret) { |
499 | dev_err(&i2c->dev, "failed to set power-off mode: %d\n" , |
500 | ret); |
501 | return ret; |
502 | } |
503 | |
504 | tps65910_i2c_client = i2c; |
505 | pm_power_off = tps65910_power_off; |
506 | } |
507 | |
508 | ret = devm_mfd_add_devices(dev: tps65910->dev, id: -1, |
509 | cells: tps65910s, ARRAY_SIZE(tps65910s), |
510 | NULL, irq_base: 0, |
511 | irq_domain: regmap_irq_get_domain(data: tps65910->irq_data)); |
512 | if (ret < 0) { |
513 | dev_err(&i2c->dev, "mfd_add_devices failed: %d\n" , ret); |
514 | return ret; |
515 | } |
516 | |
517 | return ret; |
518 | } |
519 | |
520 | static const struct i2c_device_id tps65910_i2c_id[] = { |
521 | { "tps65910" , TPS65910 }, |
522 | { "tps65911" , TPS65911 }, |
523 | { } |
524 | }; |
525 | |
526 | static struct i2c_driver tps65910_i2c_driver = { |
527 | .driver = { |
528 | .name = "tps65910" , |
529 | .of_match_table = of_match_ptr(tps65910_of_match), |
530 | }, |
531 | .probe = tps65910_i2c_probe, |
532 | .id_table = tps65910_i2c_id, |
533 | }; |
534 | |
535 | static int __init tps65910_i2c_init(void) |
536 | { |
537 | return i2c_add_driver(&tps65910_i2c_driver); |
538 | } |
539 | /* init early so consumer devices can complete system boot */ |
540 | subsys_initcall(tps65910_i2c_init); |
541 | |