This source file includes following definitions.
- to_exynos_irq_chip
- exynos_irq_mask
- exynos_irq_ack
- exynos_irq_unmask
- exynos_irq_set_type
- exynos_irq_request_resources
- exynos_irq_release_resources
- exynos_eint_irq_map
- exynos_eint_gpio_irq
- exynos_eint_gpio_init
- exynos_wkup_irq_set_wake
- exynos_irq_eint0_15
- exynos_irq_demux_eint
- exynos_irq_demux_eint16_31
- exynos_eint_wkup_init
- exynos_pinctrl_set_eint_wakeup_mask
- exynos_pinctrl_suspend_bank
- exynos_pinctrl_suspend
- exynos_pinctrl_resume_bank
- exynos_pinctrl_resume
- exynos_retention_enable
- exynos_retention_disable
- exynos_retention_init
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16 #include <linux/device.h>
17 #include <linux/interrupt.h>
18 #include <linux/irqdomain.h>
19 #include <linux/irq.h>
20 #include <linux/irqchip/chained_irq.h>
21 #include <linux/of.h>
22 #include <linux/of_irq.h>
23 #include <linux/slab.h>
24 #include <linux/spinlock.h>
25 #include <linux/regmap.h>
26 #include <linux/err.h>
27 #include <linux/soc/samsung/exynos-pmu.h>
28 #include <linux/soc/samsung/exynos-regs-pmu.h>
29
30 #include <dt-bindings/pinctrl/samsung.h>
31
32 #include "pinctrl-samsung.h"
33 #include "pinctrl-exynos.h"
34
35 struct exynos_irq_chip {
36 struct irq_chip chip;
37
38 u32 eint_con;
39 u32 eint_mask;
40 u32 eint_pend;
41 u32 eint_wake_mask_value;
42 u32 eint_wake_mask_reg;
43 };
44
45 static inline struct exynos_irq_chip *to_exynos_irq_chip(struct irq_chip *chip)
46 {
47 return container_of(chip, struct exynos_irq_chip, chip);
48 }
49
50 static void exynos_irq_mask(struct irq_data *irqd)
51 {
52 struct irq_chip *chip = irq_data_get_irq_chip(irqd);
53 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
54 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
55 unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
56 unsigned long mask;
57 unsigned long flags;
58
59 spin_lock_irqsave(&bank->slock, flags);
60
61 mask = readl(bank->eint_base + reg_mask);
62 mask |= 1 << irqd->hwirq;
63 writel(mask, bank->eint_base + reg_mask);
64
65 spin_unlock_irqrestore(&bank->slock, flags);
66 }
67
68 static void exynos_irq_ack(struct irq_data *irqd)
69 {
70 struct irq_chip *chip = irq_data_get_irq_chip(irqd);
71 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
72 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
73 unsigned long reg_pend = our_chip->eint_pend + bank->eint_offset;
74
75 writel(1 << irqd->hwirq, bank->eint_base + reg_pend);
76 }
77
78 static void exynos_irq_unmask(struct irq_data *irqd)
79 {
80 struct irq_chip *chip = irq_data_get_irq_chip(irqd);
81 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
82 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
83 unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
84 unsigned long mask;
85 unsigned long flags;
86
87
88
89
90
91
92
93
94
95 if (irqd_get_trigger_type(irqd) & IRQ_TYPE_LEVEL_MASK)
96 exynos_irq_ack(irqd);
97
98 spin_lock_irqsave(&bank->slock, flags);
99
100 mask = readl(bank->eint_base + reg_mask);
101 mask &= ~(1 << irqd->hwirq);
102 writel(mask, bank->eint_base + reg_mask);
103
104 spin_unlock_irqrestore(&bank->slock, flags);
105 }
106
107 static int exynos_irq_set_type(struct irq_data *irqd, unsigned int type)
108 {
109 struct irq_chip *chip = irq_data_get_irq_chip(irqd);
110 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
111 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
112 unsigned int shift = EXYNOS_EINT_CON_LEN * irqd->hwirq;
113 unsigned int con, trig_type;
114 unsigned long reg_con = our_chip->eint_con + bank->eint_offset;
115
116 switch (type) {
117 case IRQ_TYPE_EDGE_RISING:
118 trig_type = EXYNOS_EINT_EDGE_RISING;
119 break;
120 case IRQ_TYPE_EDGE_FALLING:
121 trig_type = EXYNOS_EINT_EDGE_FALLING;
122 break;
123 case IRQ_TYPE_EDGE_BOTH:
124 trig_type = EXYNOS_EINT_EDGE_BOTH;
125 break;
126 case IRQ_TYPE_LEVEL_HIGH:
127 trig_type = EXYNOS_EINT_LEVEL_HIGH;
128 break;
129 case IRQ_TYPE_LEVEL_LOW:
130 trig_type = EXYNOS_EINT_LEVEL_LOW;
131 break;
132 default:
133 pr_err("unsupported external interrupt type\n");
134 return -EINVAL;
135 }
136
137 if (type & IRQ_TYPE_EDGE_BOTH)
138 irq_set_handler_locked(irqd, handle_edge_irq);
139 else
140 irq_set_handler_locked(irqd, handle_level_irq);
141
142 con = readl(bank->eint_base + reg_con);
143 con &= ~(EXYNOS_EINT_CON_MASK << shift);
144 con |= trig_type << shift;
145 writel(con, bank->eint_base + reg_con);
146
147 return 0;
148 }
149
150 static int exynos_irq_request_resources(struct irq_data *irqd)
151 {
152 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
153 const struct samsung_pin_bank_type *bank_type = bank->type;
154 unsigned long reg_con, flags;
155 unsigned int shift, mask, con;
156 int ret;
157
158 ret = gpiochip_lock_as_irq(&bank->gpio_chip, irqd->hwirq);
159 if (ret) {
160 dev_err(bank->gpio_chip.parent,
161 "unable to lock pin %s-%lu IRQ\n",
162 bank->name, irqd->hwirq);
163 return ret;
164 }
165
166 reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC];
167 shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
168 mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
169
170 spin_lock_irqsave(&bank->slock, flags);
171
172 con = readl(bank->pctl_base + reg_con);
173 con &= ~(mask << shift);
174 con |= EXYNOS_PIN_FUNC_EINT << shift;
175 writel(con, bank->pctl_base + reg_con);
176
177 spin_unlock_irqrestore(&bank->slock, flags);
178
179 return 0;
180 }
181
182 static void exynos_irq_release_resources(struct irq_data *irqd)
183 {
184 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
185 const struct samsung_pin_bank_type *bank_type = bank->type;
186 unsigned long reg_con, flags;
187 unsigned int shift, mask, con;
188
189 reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC];
190 shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
191 mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
192
193 spin_lock_irqsave(&bank->slock, flags);
194
195 con = readl(bank->pctl_base + reg_con);
196 con &= ~(mask << shift);
197 con |= EXYNOS_PIN_FUNC_INPUT << shift;
198 writel(con, bank->pctl_base + reg_con);
199
200 spin_unlock_irqrestore(&bank->slock, flags);
201
202 gpiochip_unlock_as_irq(&bank->gpio_chip, irqd->hwirq);
203 }
204
205
206
207
208 static struct exynos_irq_chip exynos_gpio_irq_chip = {
209 .chip = {
210 .name = "exynos_gpio_irq_chip",
211 .irq_unmask = exynos_irq_unmask,
212 .irq_mask = exynos_irq_mask,
213 .irq_ack = exynos_irq_ack,
214 .irq_set_type = exynos_irq_set_type,
215 .irq_request_resources = exynos_irq_request_resources,
216 .irq_release_resources = exynos_irq_release_resources,
217 },
218 .eint_con = EXYNOS_GPIO_ECON_OFFSET,
219 .eint_mask = EXYNOS_GPIO_EMASK_OFFSET,
220 .eint_pend = EXYNOS_GPIO_EPEND_OFFSET,
221
222 };
223
224 static int exynos_eint_irq_map(struct irq_domain *h, unsigned int virq,
225 irq_hw_number_t hw)
226 {
227 struct samsung_pin_bank *b = h->host_data;
228
229 irq_set_chip_data(virq, b);
230 irq_set_chip_and_handler(virq, &b->irq_chip->chip,
231 handle_level_irq);
232 return 0;
233 }
234
235
236
237
238 static const struct irq_domain_ops exynos_eint_irqd_ops = {
239 .map = exynos_eint_irq_map,
240 .xlate = irq_domain_xlate_twocell,
241 };
242
243 static irqreturn_t exynos_eint_gpio_irq(int irq, void *data)
244 {
245 struct samsung_pinctrl_drv_data *d = data;
246 struct samsung_pin_bank *bank = d->pin_banks;
247 unsigned int svc, group, pin, virq;
248
249 svc = readl(bank->eint_base + EXYNOS_SVC_OFFSET);
250 group = EXYNOS_SVC_GROUP(svc);
251 pin = svc & EXYNOS_SVC_NUM_MASK;
252
253 if (!group)
254 return IRQ_HANDLED;
255 bank += (group - 1);
256
257 virq = irq_linear_revmap(bank->irq_domain, pin);
258 if (!virq)
259 return IRQ_NONE;
260 generic_handle_irq(virq);
261 return IRQ_HANDLED;
262 }
263
264 struct exynos_eint_gpio_save {
265 u32 eint_con;
266 u32 eint_fltcon0;
267 u32 eint_fltcon1;
268 };
269
270
271
272
273
274 int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
275 {
276 struct samsung_pin_bank *bank;
277 struct device *dev = d->dev;
278 int ret;
279 int i;
280
281 if (!d->irq) {
282 dev_err(dev, "irq number not available\n");
283 return -EINVAL;
284 }
285
286 ret = devm_request_irq(dev, d->irq, exynos_eint_gpio_irq,
287 0, dev_name(dev), d);
288 if (ret) {
289 dev_err(dev, "irq request failed\n");
290 return -ENXIO;
291 }
292
293 bank = d->pin_banks;
294 for (i = 0; i < d->nr_banks; ++i, ++bank) {
295 if (bank->eint_type != EINT_TYPE_GPIO)
296 continue;
297 bank->irq_domain = irq_domain_add_linear(bank->of_node,
298 bank->nr_pins, &exynos_eint_irqd_ops, bank);
299 if (!bank->irq_domain) {
300 dev_err(dev, "gpio irq domain add failed\n");
301 ret = -ENXIO;
302 goto err_domains;
303 }
304
305 bank->soc_priv = devm_kzalloc(d->dev,
306 sizeof(struct exynos_eint_gpio_save), GFP_KERNEL);
307 if (!bank->soc_priv) {
308 irq_domain_remove(bank->irq_domain);
309 ret = -ENOMEM;
310 goto err_domains;
311 }
312
313 bank->irq_chip = &exynos_gpio_irq_chip;
314 }
315
316 return 0;
317
318 err_domains:
319 for (--i, --bank; i >= 0; --i, --bank) {
320 if (bank->eint_type != EINT_TYPE_GPIO)
321 continue;
322 irq_domain_remove(bank->irq_domain);
323 }
324
325 return ret;
326 }
327
328 static int exynos_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on)
329 {
330 struct irq_chip *chip = irq_data_get_irq_chip(irqd);
331 struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
332 struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
333 unsigned long bit = 1UL << (2 * bank->eint_offset + irqd->hwirq);
334
335 pr_info("wake %s for irq %d\n", on ? "enabled" : "disabled", irqd->irq);
336
337 if (!on)
338 our_chip->eint_wake_mask_value |= bit;
339 else
340 our_chip->eint_wake_mask_value &= ~bit;
341
342 return 0;
343 }
344
345
346
347
348 static const struct exynos_irq_chip s5pv210_wkup_irq_chip __initconst = {
349 .chip = {
350 .name = "s5pv210_wkup_irq_chip",
351 .irq_unmask = exynos_irq_unmask,
352 .irq_mask = exynos_irq_mask,
353 .irq_ack = exynos_irq_ack,
354 .irq_set_type = exynos_irq_set_type,
355 .irq_set_wake = exynos_wkup_irq_set_wake,
356 .irq_request_resources = exynos_irq_request_resources,
357 .irq_release_resources = exynos_irq_release_resources,
358 },
359 .eint_con = EXYNOS_WKUP_ECON_OFFSET,
360 .eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
361 .eint_pend = EXYNOS_WKUP_EPEND_OFFSET,
362 .eint_wake_mask_value = EXYNOS_EINT_WAKEUP_MASK_DISABLED,
363
364 .eint_wake_mask_reg = S5PV210_EINT_WAKEUP_MASK,
365 };
366
367 static const struct exynos_irq_chip exynos4210_wkup_irq_chip __initconst = {
368 .chip = {
369 .name = "exynos4210_wkup_irq_chip",
370 .irq_unmask = exynos_irq_unmask,
371 .irq_mask = exynos_irq_mask,
372 .irq_ack = exynos_irq_ack,
373 .irq_set_type = exynos_irq_set_type,
374 .irq_set_wake = exynos_wkup_irq_set_wake,
375 .irq_request_resources = exynos_irq_request_resources,
376 .irq_release_resources = exynos_irq_release_resources,
377 },
378 .eint_con = EXYNOS_WKUP_ECON_OFFSET,
379 .eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
380 .eint_pend = EXYNOS_WKUP_EPEND_OFFSET,
381 .eint_wake_mask_value = EXYNOS_EINT_WAKEUP_MASK_DISABLED,
382 .eint_wake_mask_reg = EXYNOS_EINT_WAKEUP_MASK,
383 };
384
385 static const struct exynos_irq_chip exynos7_wkup_irq_chip __initconst = {
386 .chip = {
387 .name = "exynos7_wkup_irq_chip",
388 .irq_unmask = exynos_irq_unmask,
389 .irq_mask = exynos_irq_mask,
390 .irq_ack = exynos_irq_ack,
391 .irq_set_type = exynos_irq_set_type,
392 .irq_set_wake = exynos_wkup_irq_set_wake,
393 .irq_request_resources = exynos_irq_request_resources,
394 .irq_release_resources = exynos_irq_release_resources,
395 },
396 .eint_con = EXYNOS7_WKUP_ECON_OFFSET,
397 .eint_mask = EXYNOS7_WKUP_EMASK_OFFSET,
398 .eint_pend = EXYNOS7_WKUP_EPEND_OFFSET,
399 .eint_wake_mask_value = EXYNOS_EINT_WAKEUP_MASK_DISABLED,
400 .eint_wake_mask_reg = EXYNOS5433_EINT_WAKEUP_MASK,
401 };
402
403
404 static const struct of_device_id exynos_wkup_irq_ids[] = {
405 { .compatible = "samsung,s5pv210-wakeup-eint",
406 .data = &s5pv210_wkup_irq_chip },
407 { .compatible = "samsung,exynos4210-wakeup-eint",
408 .data = &exynos4210_wkup_irq_chip },
409 { .compatible = "samsung,exynos7-wakeup-eint",
410 .data = &exynos7_wkup_irq_chip },
411 { }
412 };
413
414
415 static void exynos_irq_eint0_15(struct irq_desc *desc)
416 {
417 struct exynos_weint_data *eintd = irq_desc_get_handler_data(desc);
418 struct samsung_pin_bank *bank = eintd->bank;
419 struct irq_chip *chip = irq_desc_get_chip(desc);
420 int eint_irq;
421
422 chained_irq_enter(chip, desc);
423
424 eint_irq = irq_linear_revmap(bank->irq_domain, eintd->irq);
425 generic_handle_irq(eint_irq);
426
427 chained_irq_exit(chip, desc);
428 }
429
430 static inline void exynos_irq_demux_eint(unsigned long pend,
431 struct irq_domain *domain)
432 {
433 unsigned int irq;
434
435 while (pend) {
436 irq = fls(pend) - 1;
437 generic_handle_irq(irq_find_mapping(domain, irq));
438 pend &= ~(1 << irq);
439 }
440 }
441
442
443 static void exynos_irq_demux_eint16_31(struct irq_desc *desc)
444 {
445 struct irq_chip *chip = irq_desc_get_chip(desc);
446 struct exynos_muxed_weint_data *eintd = irq_desc_get_handler_data(desc);
447 unsigned long pend;
448 unsigned long mask;
449 int i;
450
451 chained_irq_enter(chip, desc);
452
453 for (i = 0; i < eintd->nr_banks; ++i) {
454 struct samsung_pin_bank *b = eintd->banks[i];
455 pend = readl(b->eint_base + b->irq_chip->eint_pend
456 + b->eint_offset);
457 mask = readl(b->eint_base + b->irq_chip->eint_mask
458 + b->eint_offset);
459 exynos_irq_demux_eint(pend & ~mask, b->irq_domain);
460 }
461
462 chained_irq_exit(chip, desc);
463 }
464
465
466
467
468
469 int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
470 {
471 struct device *dev = d->dev;
472 struct device_node *wkup_np = NULL;
473 struct device_node *np;
474 struct samsung_pin_bank *bank;
475 struct exynos_weint_data *weint_data;
476 struct exynos_muxed_weint_data *muxed_data;
477 struct exynos_irq_chip *irq_chip;
478 unsigned int muxed_banks = 0;
479 unsigned int i;
480 int idx, irq;
481
482 for_each_child_of_node(dev->of_node, np) {
483 const struct of_device_id *match;
484
485 match = of_match_node(exynos_wkup_irq_ids, np);
486 if (match) {
487 irq_chip = kmemdup(match->data,
488 sizeof(*irq_chip), GFP_KERNEL);
489 if (!irq_chip) {
490 of_node_put(np);
491 return -ENOMEM;
492 }
493 wkup_np = np;
494 break;
495 }
496 }
497 if (!wkup_np)
498 return -ENODEV;
499
500 bank = d->pin_banks;
501 for (i = 0; i < d->nr_banks; ++i, ++bank) {
502 if (bank->eint_type != EINT_TYPE_WKUP)
503 continue;
504
505 bank->irq_domain = irq_domain_add_linear(bank->of_node,
506 bank->nr_pins, &exynos_eint_irqd_ops, bank);
507 if (!bank->irq_domain) {
508 dev_err(dev, "wkup irq domain add failed\n");
509 of_node_put(wkup_np);
510 return -ENXIO;
511 }
512
513 bank->irq_chip = irq_chip;
514
515 if (!of_find_property(bank->of_node, "interrupts", NULL)) {
516 bank->eint_type = EINT_TYPE_WKUP_MUX;
517 ++muxed_banks;
518 continue;
519 }
520
521 weint_data = devm_kcalloc(dev,
522 bank->nr_pins, sizeof(*weint_data),
523 GFP_KERNEL);
524 if (!weint_data) {
525 of_node_put(wkup_np);
526 return -ENOMEM;
527 }
528
529 for (idx = 0; idx < bank->nr_pins; ++idx) {
530 irq = irq_of_parse_and_map(bank->of_node, idx);
531 if (!irq) {
532 dev_err(dev, "irq number for eint-%s-%d not found\n",
533 bank->name, idx);
534 continue;
535 }
536 weint_data[idx].irq = idx;
537 weint_data[idx].bank = bank;
538 irq_set_chained_handler_and_data(irq,
539 exynos_irq_eint0_15,
540 &weint_data[idx]);
541 }
542 }
543
544 if (!muxed_banks) {
545 of_node_put(wkup_np);
546 return 0;
547 }
548
549 irq = irq_of_parse_and_map(wkup_np, 0);
550 of_node_put(wkup_np);
551 if (!irq) {
552 dev_err(dev, "irq number for muxed EINTs not found\n");
553 return 0;
554 }
555
556 muxed_data = devm_kzalloc(dev, sizeof(*muxed_data)
557 + muxed_banks*sizeof(struct samsung_pin_bank *), GFP_KERNEL);
558 if (!muxed_data)
559 return -ENOMEM;
560
561 irq_set_chained_handler_and_data(irq, exynos_irq_demux_eint16_31,
562 muxed_data);
563
564 bank = d->pin_banks;
565 idx = 0;
566 for (i = 0; i < d->nr_banks; ++i, ++bank) {
567 if (bank->eint_type != EINT_TYPE_WKUP_MUX)
568 continue;
569
570 muxed_data->banks[idx++] = bank;
571 }
572 muxed_data->nr_banks = muxed_banks;
573
574 return 0;
575 }
576
577 static void
578 exynos_pinctrl_set_eint_wakeup_mask(struct samsung_pinctrl_drv_data *drvdata,
579 struct exynos_irq_chip *irq_chip)
580 {
581 struct regmap *pmu_regs;
582
583 if (!drvdata->retention_ctrl || !drvdata->retention_ctrl->priv) {
584 dev_warn(drvdata->dev,
585 "No retention data configured bank with external wakeup interrupt. Wake-up mask will not be set.\n");
586 return;
587 }
588
589 pmu_regs = drvdata->retention_ctrl->priv;
590 dev_info(drvdata->dev,
591 "Setting external wakeup interrupt mask: 0x%x\n",
592 irq_chip->eint_wake_mask_value);
593
594 regmap_write(pmu_regs, irq_chip->eint_wake_mask_reg,
595 irq_chip->eint_wake_mask_value);
596 }
597
598 static void exynos_pinctrl_suspend_bank(
599 struct samsung_pinctrl_drv_data *drvdata,
600 struct samsung_pin_bank *bank)
601 {
602 struct exynos_eint_gpio_save *save = bank->soc_priv;
603 void __iomem *regs = bank->eint_base;
604
605 save->eint_con = readl(regs + EXYNOS_GPIO_ECON_OFFSET
606 + bank->eint_offset);
607 save->eint_fltcon0 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
608 + 2 * bank->eint_offset);
609 save->eint_fltcon1 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
610 + 2 * bank->eint_offset + 4);
611
612 pr_debug("%s: save con %#010x\n", bank->name, save->eint_con);
613 pr_debug("%s: save fltcon0 %#010x\n", bank->name, save->eint_fltcon0);
614 pr_debug("%s: save fltcon1 %#010x\n", bank->name, save->eint_fltcon1);
615 }
616
617 void exynos_pinctrl_suspend(struct samsung_pinctrl_drv_data *drvdata)
618 {
619 struct samsung_pin_bank *bank = drvdata->pin_banks;
620 struct exynos_irq_chip *irq_chip = NULL;
621 int i;
622
623 for (i = 0; i < drvdata->nr_banks; ++i, ++bank) {
624 if (bank->eint_type == EINT_TYPE_GPIO)
625 exynos_pinctrl_suspend_bank(drvdata, bank);
626 else if (bank->eint_type == EINT_TYPE_WKUP) {
627 if (!irq_chip) {
628 irq_chip = bank->irq_chip;
629 exynos_pinctrl_set_eint_wakeup_mask(drvdata,
630 irq_chip);
631 } else if (bank->irq_chip != irq_chip) {
632 dev_warn(drvdata->dev,
633 "More than one external wakeup interrupt chip configured (bank: %s). This is not supported by hardware nor by driver.\n",
634 bank->name);
635 }
636 }
637 }
638 }
639
640 static void exynos_pinctrl_resume_bank(
641 struct samsung_pinctrl_drv_data *drvdata,
642 struct samsung_pin_bank *bank)
643 {
644 struct exynos_eint_gpio_save *save = bank->soc_priv;
645 void __iomem *regs = bank->eint_base;
646
647 pr_debug("%s: con %#010x => %#010x\n", bank->name,
648 readl(regs + EXYNOS_GPIO_ECON_OFFSET
649 + bank->eint_offset), save->eint_con);
650 pr_debug("%s: fltcon0 %#010x => %#010x\n", bank->name,
651 readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
652 + 2 * bank->eint_offset), save->eint_fltcon0);
653 pr_debug("%s: fltcon1 %#010x => %#010x\n", bank->name,
654 readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
655 + 2 * bank->eint_offset + 4), save->eint_fltcon1);
656
657 writel(save->eint_con, regs + EXYNOS_GPIO_ECON_OFFSET
658 + bank->eint_offset);
659 writel(save->eint_fltcon0, regs + EXYNOS_GPIO_EFLTCON_OFFSET
660 + 2 * bank->eint_offset);
661 writel(save->eint_fltcon1, regs + EXYNOS_GPIO_EFLTCON_OFFSET
662 + 2 * bank->eint_offset + 4);
663 }
664
665 void exynos_pinctrl_resume(struct samsung_pinctrl_drv_data *drvdata)
666 {
667 struct samsung_pin_bank *bank = drvdata->pin_banks;
668 int i;
669
670 for (i = 0; i < drvdata->nr_banks; ++i, ++bank)
671 if (bank->eint_type == EINT_TYPE_GPIO)
672 exynos_pinctrl_resume_bank(drvdata, bank);
673 }
674
675 static void exynos_retention_enable(struct samsung_pinctrl_drv_data *drvdata)
676 {
677 if (drvdata->retention_ctrl->refcnt)
678 atomic_inc(drvdata->retention_ctrl->refcnt);
679 }
680
681 static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
682 {
683 struct samsung_retention_ctrl *ctrl = drvdata->retention_ctrl;
684 struct regmap *pmu_regs = ctrl->priv;
685 int i;
686
687 if (ctrl->refcnt && !atomic_dec_and_test(ctrl->refcnt))
688 return;
689
690 for (i = 0; i < ctrl->nr_regs; i++)
691 regmap_write(pmu_regs, ctrl->regs[i], ctrl->value);
692 }
693
694 struct samsung_retention_ctrl *
695 exynos_retention_init(struct samsung_pinctrl_drv_data *drvdata,
696 const struct samsung_retention_data *data)
697 {
698 struct samsung_retention_ctrl *ctrl;
699 struct regmap *pmu_regs;
700 int i;
701
702 ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL);
703 if (!ctrl)
704 return ERR_PTR(-ENOMEM);
705
706 pmu_regs = exynos_get_pmu_regmap();
707 if (IS_ERR(pmu_regs))
708 return ERR_CAST(pmu_regs);
709
710 ctrl->priv = pmu_regs;
711 ctrl->regs = data->regs;
712 ctrl->nr_regs = data->nr_regs;
713 ctrl->value = data->value;
714 ctrl->refcnt = data->refcnt;
715 ctrl->enable = exynos_retention_enable;
716 ctrl->disable = exynos_retention_disable;
717
718
719 for (i = 0; i < ctrl->nr_regs; i++)
720 regmap_write(pmu_regs, ctrl->regs[i], ctrl->value);
721
722 return ctrl;
723 }