1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) Maxime Coquelin 2015
4 * Copyright (C) STMicroelectronics 2017
5 * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com>
8 #include <linux/bitops.h>
9 #include <linux/delay.h>
10 #include <linux/hwspinlock.h>
11 #include <linux/interrupt.h>
13 #include <linux/irq.h>
14 #include <linux/irqchip.h>
15 #include <linux/irqchip/chained_irq.h>
16 #include <linux/irqdomain.h>
17 #include <linux/module.h>
18 #include <linux/of_address.h>
19 #include <linux/of_irq.h>
20 #include <linux/of_platform.h>
21 #include <linux/syscore_ops.h>
23 #include <dt-bindings/interrupt-controller/arm-gic.h>
25 #define IRQS_PER_BANK 32
27 #define HWSPNLCK_TIMEOUT 1000 /* usec */
29 struct stm32_exti_bank {
41 struct stm32_desc_irq {
44 struct irq_chip *chip;
47 struct stm32_exti_drv_data {
48 const struct stm32_exti_bank **exti_banks;
49 const struct stm32_desc_irq *desc_irqs;
54 struct stm32_exti_chip_data {
55 struct stm32_exti_host_data *host_data;
56 const struct stm32_exti_bank *reg_bank;
57 struct raw_spinlock rlock;
64 struct stm32_exti_host_data {
66 struct stm32_exti_chip_data *chips_data;
67 const struct stm32_exti_drv_data *drv_data;
68 struct hwspinlock *hwlock;
71 static struct stm32_exti_host_data *stm32_host_data;
73 static const struct stm32_exti_bank stm32f4xx_exti_b1 = {
80 .fpr_ofst = UNDEF_REG,
83 static const struct stm32_exti_bank *stm32f4xx_exti_banks[] = {
87 static const struct stm32_exti_drv_data stm32f4xx_drv_data = {
88 .exti_banks = stm32f4xx_exti_banks,
89 .bank_nr = ARRAY_SIZE(stm32f4xx_exti_banks),
92 static const struct stm32_exti_bank stm32h7xx_exti_b1 = {
99 .fpr_ofst = UNDEF_REG,
102 static const struct stm32_exti_bank stm32h7xx_exti_b2 = {
109 .fpr_ofst = UNDEF_REG,
112 static const struct stm32_exti_bank stm32h7xx_exti_b3 = {
119 .fpr_ofst = UNDEF_REG,
122 static const struct stm32_exti_bank *stm32h7xx_exti_banks[] = {
128 static const struct stm32_exti_drv_data stm32h7xx_drv_data = {
129 .exti_banks = stm32h7xx_exti_banks,
130 .bank_nr = ARRAY_SIZE(stm32h7xx_exti_banks),
133 static const struct stm32_exti_bank stm32mp1_exti_b1 = {
143 static const struct stm32_exti_bank stm32mp1_exti_b2 = {
153 static const struct stm32_exti_bank stm32mp1_exti_b3 = {
163 static const struct stm32_exti_bank *stm32mp1_exti_banks[] = {
169 static struct irq_chip stm32_exti_h_chip;
170 static struct irq_chip stm32_exti_h_chip_direct;
172 static const struct stm32_desc_irq stm32mp1_desc_irq[] = {
173 { .exti = 0, .irq_parent = 6, .chip = &stm32_exti_h_chip },
174 { .exti = 1, .irq_parent = 7, .chip = &stm32_exti_h_chip },
175 { .exti = 2, .irq_parent = 8, .chip = &stm32_exti_h_chip },
176 { .exti = 3, .irq_parent = 9, .chip = &stm32_exti_h_chip },
177 { .exti = 4, .irq_parent = 10, .chip = &stm32_exti_h_chip },
178 { .exti = 5, .irq_parent = 23, .chip = &stm32_exti_h_chip },
179 { .exti = 6, .irq_parent = 64, .chip = &stm32_exti_h_chip },
180 { .exti = 7, .irq_parent = 65, .chip = &stm32_exti_h_chip },
181 { .exti = 8, .irq_parent = 66, .chip = &stm32_exti_h_chip },
182 { .exti = 9, .irq_parent = 67, .chip = &stm32_exti_h_chip },
183 { .exti = 10, .irq_parent = 40, .chip = &stm32_exti_h_chip },
184 { .exti = 11, .irq_parent = 42, .chip = &stm32_exti_h_chip },
185 { .exti = 12, .irq_parent = 76, .chip = &stm32_exti_h_chip },
186 { .exti = 13, .irq_parent = 77, .chip = &stm32_exti_h_chip },
187 { .exti = 14, .irq_parent = 121, .chip = &stm32_exti_h_chip },
188 { .exti = 15, .irq_parent = 127, .chip = &stm32_exti_h_chip },
189 { .exti = 16, .irq_parent = 1, .chip = &stm32_exti_h_chip },
190 { .exti = 19, .irq_parent = 3, .chip = &stm32_exti_h_chip_direct },
191 { .exti = 21, .irq_parent = 31, .chip = &stm32_exti_h_chip_direct },
192 { .exti = 22, .irq_parent = 33, .chip = &stm32_exti_h_chip_direct },
193 { .exti = 23, .irq_parent = 72, .chip = &stm32_exti_h_chip_direct },
194 { .exti = 24, .irq_parent = 95, .chip = &stm32_exti_h_chip_direct },
195 { .exti = 25, .irq_parent = 107, .chip = &stm32_exti_h_chip_direct },
196 { .exti = 30, .irq_parent = 52, .chip = &stm32_exti_h_chip_direct },
197 { .exti = 47, .irq_parent = 93, .chip = &stm32_exti_h_chip_direct },
198 { .exti = 54, .irq_parent = 135, .chip = &stm32_exti_h_chip_direct },
199 { .exti = 61, .irq_parent = 100, .chip = &stm32_exti_h_chip_direct },
200 { .exti = 65, .irq_parent = 144, .chip = &stm32_exti_h_chip },
201 { .exti = 68, .irq_parent = 143, .chip = &stm32_exti_h_chip },
202 { .exti = 70, .irq_parent = 62, .chip = &stm32_exti_h_chip_direct },
203 { .exti = 73, .irq_parent = 129, .chip = &stm32_exti_h_chip },
206 static const struct stm32_exti_drv_data stm32mp1_drv_data = {
207 .exti_banks = stm32mp1_exti_banks,
208 .bank_nr = ARRAY_SIZE(stm32mp1_exti_banks),
209 .desc_irqs = stm32mp1_desc_irq,
210 .irq_nr = ARRAY_SIZE(stm32mp1_desc_irq),
214 stm32_desc_irq *stm32_exti_get_desc(const struct stm32_exti_drv_data *drv_data,
215 irq_hw_number_t hwirq)
217 const struct stm32_desc_irq *desc = NULL;
220 if (!drv_data->desc_irqs)
223 for (i = 0; i < drv_data->irq_nr; i++) {
224 desc = &drv_data->desc_irqs[i];
225 if (desc->exti == hwirq)
232 static unsigned long stm32_exti_pending(struct irq_chip_generic *gc)
234 struct stm32_exti_chip_data *chip_data = gc->private;
235 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
236 unsigned long pending;
238 pending = irq_reg_readl(gc, stm32_bank->rpr_ofst);
239 if (stm32_bank->fpr_ofst != UNDEF_REG)
240 pending |= irq_reg_readl(gc, stm32_bank->fpr_ofst);
245 static void stm32_irq_handler(struct irq_desc *desc)
247 struct irq_domain *domain = irq_desc_get_handler_data(desc);
248 struct irq_chip *chip = irq_desc_get_chip(desc);
249 unsigned int virq, nbanks = domain->gc->num_chips;
250 struct irq_chip_generic *gc;
251 unsigned long pending;
252 int n, i, irq_base = 0;
254 chained_irq_enter(chip, desc);
256 for (i = 0; i < nbanks; i++, irq_base += IRQS_PER_BANK) {
257 gc = irq_get_domain_generic_chip(domain, irq_base);
259 while ((pending = stm32_exti_pending(gc))) {
260 for_each_set_bit(n, &pending, IRQS_PER_BANK) {
261 virq = irq_find_mapping(domain, irq_base + n);
262 generic_handle_irq(virq);
267 chained_irq_exit(chip, desc);
270 static int stm32_exti_set_type(struct irq_data *d,
271 unsigned int type, u32 *rtsr, u32 *ftsr)
273 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
276 case IRQ_TYPE_EDGE_RISING:
280 case IRQ_TYPE_EDGE_FALLING:
284 case IRQ_TYPE_EDGE_BOTH:
295 static int stm32_irq_set_type(struct irq_data *d, unsigned int type)
297 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
298 struct stm32_exti_chip_data *chip_data = gc->private;
299 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
300 struct hwspinlock *hwlock = chip_data->host_data->hwlock;
307 err = hwspin_lock_timeout_in_atomic(hwlock, HWSPNLCK_TIMEOUT);
309 pr_err("%s can't get hwspinlock (%d)\n", __func__, err);
314 rtsr = irq_reg_readl(gc, stm32_bank->rtsr_ofst);
315 ftsr = irq_reg_readl(gc, stm32_bank->ftsr_ofst);
317 err = stm32_exti_set_type(d, type, &rtsr, &ftsr);
321 irq_reg_writel(gc, rtsr, stm32_bank->rtsr_ofst);
322 irq_reg_writel(gc, ftsr, stm32_bank->ftsr_ofst);
326 hwspin_unlock_in_atomic(hwlock);
333 static void stm32_chip_suspend(struct stm32_exti_chip_data *chip_data,
336 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
337 void __iomem *base = chip_data->host_data->base;
339 /* save rtsr, ftsr registers */
340 chip_data->rtsr_cache = readl_relaxed(base + stm32_bank->rtsr_ofst);
341 chip_data->ftsr_cache = readl_relaxed(base + stm32_bank->ftsr_ofst);
343 writel_relaxed(wake_active, base + stm32_bank->imr_ofst);
346 static void stm32_chip_resume(struct stm32_exti_chip_data *chip_data,
349 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
350 void __iomem *base = chip_data->host_data->base;
352 /* restore rtsr, ftsr, registers */
353 writel_relaxed(chip_data->rtsr_cache, base + stm32_bank->rtsr_ofst);
354 writel_relaxed(chip_data->ftsr_cache, base + stm32_bank->ftsr_ofst);
356 writel_relaxed(mask_cache, base + stm32_bank->imr_ofst);
359 static void stm32_irq_suspend(struct irq_chip_generic *gc)
361 struct stm32_exti_chip_data *chip_data = gc->private;
364 stm32_chip_suspend(chip_data, gc->wake_active);
368 static void stm32_irq_resume(struct irq_chip_generic *gc)
370 struct stm32_exti_chip_data *chip_data = gc->private;
373 stm32_chip_resume(chip_data, gc->mask_cache);
377 static int stm32_exti_alloc(struct irq_domain *d, unsigned int virq,
378 unsigned int nr_irqs, void *data)
380 struct irq_fwspec *fwspec = data;
381 irq_hw_number_t hwirq;
383 hwirq = fwspec->param[0];
385 irq_map_generic_chip(d, virq, hwirq);
390 static void stm32_exti_free(struct irq_domain *d, unsigned int virq,
391 unsigned int nr_irqs)
393 struct irq_data *data = irq_domain_get_irq_data(d, virq);
395 irq_domain_reset_irq_data(data);
398 static const struct irq_domain_ops irq_exti_domain_ops = {
399 .map = irq_map_generic_chip,
400 .alloc = stm32_exti_alloc,
401 .free = stm32_exti_free,
404 static void stm32_irq_ack(struct irq_data *d)
406 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
407 struct stm32_exti_chip_data *chip_data = gc->private;
408 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
412 irq_reg_writel(gc, d->mask, stm32_bank->rpr_ofst);
413 if (stm32_bank->fpr_ofst != UNDEF_REG)
414 irq_reg_writel(gc, d->mask, stm32_bank->fpr_ofst);
419 /* directly set the target bit without reading first. */
420 static inline void stm32_exti_write_bit(struct irq_data *d, u32 reg)
422 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
423 void __iomem *base = chip_data->host_data->base;
424 u32 val = BIT(d->hwirq % IRQS_PER_BANK);
426 writel_relaxed(val, base + reg);
429 static inline u32 stm32_exti_set_bit(struct irq_data *d, u32 reg)
431 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
432 void __iomem *base = chip_data->host_data->base;
435 val = readl_relaxed(base + reg);
436 val |= BIT(d->hwirq % IRQS_PER_BANK);
437 writel_relaxed(val, base + reg);
442 static inline u32 stm32_exti_clr_bit(struct irq_data *d, u32 reg)
444 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
445 void __iomem *base = chip_data->host_data->base;
448 val = readl_relaxed(base + reg);
449 val &= ~BIT(d->hwirq % IRQS_PER_BANK);
450 writel_relaxed(val, base + reg);
455 static void stm32_exti_h_eoi(struct irq_data *d)
457 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
458 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
460 raw_spin_lock(&chip_data->rlock);
462 stm32_exti_write_bit(d, stm32_bank->rpr_ofst);
463 if (stm32_bank->fpr_ofst != UNDEF_REG)
464 stm32_exti_write_bit(d, stm32_bank->fpr_ofst);
466 raw_spin_unlock(&chip_data->rlock);
468 if (d->parent_data->chip)
469 irq_chip_eoi_parent(d);
472 static void stm32_exti_h_mask(struct irq_data *d)
474 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
475 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
477 raw_spin_lock(&chip_data->rlock);
478 chip_data->mask_cache = stm32_exti_clr_bit(d, stm32_bank->imr_ofst);
479 raw_spin_unlock(&chip_data->rlock);
481 if (d->parent_data->chip)
482 irq_chip_mask_parent(d);
485 static void stm32_exti_h_unmask(struct irq_data *d)
487 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
488 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
490 raw_spin_lock(&chip_data->rlock);
491 chip_data->mask_cache = stm32_exti_set_bit(d, stm32_bank->imr_ofst);
492 raw_spin_unlock(&chip_data->rlock);
494 if (d->parent_data->chip)
495 irq_chip_unmask_parent(d);
498 static int stm32_exti_h_set_type(struct irq_data *d, unsigned int type)
500 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
501 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
502 struct hwspinlock *hwlock = chip_data->host_data->hwlock;
503 void __iomem *base = chip_data->host_data->base;
507 raw_spin_lock(&chip_data->rlock);
510 err = hwspin_lock_timeout_in_atomic(hwlock, HWSPNLCK_TIMEOUT);
512 pr_err("%s can't get hwspinlock (%d)\n", __func__, err);
517 rtsr = readl_relaxed(base + stm32_bank->rtsr_ofst);
518 ftsr = readl_relaxed(base + stm32_bank->ftsr_ofst);
520 err = stm32_exti_set_type(d, type, &rtsr, &ftsr);
524 writel_relaxed(rtsr, base + stm32_bank->rtsr_ofst);
525 writel_relaxed(ftsr, base + stm32_bank->ftsr_ofst);
529 hwspin_unlock_in_atomic(hwlock);
531 raw_spin_unlock(&chip_data->rlock);
536 static int stm32_exti_h_set_wake(struct irq_data *d, unsigned int on)
538 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
539 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
541 raw_spin_lock(&chip_data->rlock);
544 chip_data->wake_active |= mask;
546 chip_data->wake_active &= ~mask;
548 raw_spin_unlock(&chip_data->rlock);
553 static int stm32_exti_h_set_affinity(struct irq_data *d,
554 const struct cpumask *dest, bool force)
556 if (d->parent_data->chip)
557 return irq_chip_set_affinity_parent(d, dest, force);
562 static int __maybe_unused stm32_exti_h_suspend(void)
564 struct stm32_exti_chip_data *chip_data;
567 for (i = 0; i < stm32_host_data->drv_data->bank_nr; i++) {
568 chip_data = &stm32_host_data->chips_data[i];
569 raw_spin_lock(&chip_data->rlock);
570 stm32_chip_suspend(chip_data, chip_data->wake_active);
571 raw_spin_unlock(&chip_data->rlock);
577 static void __maybe_unused stm32_exti_h_resume(void)
579 struct stm32_exti_chip_data *chip_data;
582 for (i = 0; i < stm32_host_data->drv_data->bank_nr; i++) {
583 chip_data = &stm32_host_data->chips_data[i];
584 raw_spin_lock(&chip_data->rlock);
585 stm32_chip_resume(chip_data, chip_data->mask_cache);
586 raw_spin_unlock(&chip_data->rlock);
590 static struct syscore_ops stm32_exti_h_syscore_ops = {
591 #ifdef CONFIG_PM_SLEEP
592 .suspend = stm32_exti_h_suspend,
593 .resume = stm32_exti_h_resume,
597 static void stm32_exti_h_syscore_init(struct stm32_exti_host_data *host_data)
599 stm32_host_data = host_data;
600 register_syscore_ops(&stm32_exti_h_syscore_ops);
603 static void stm32_exti_h_syscore_deinit(void)
605 unregister_syscore_ops(&stm32_exti_h_syscore_ops);
608 static int stm32_exti_h_retrigger(struct irq_data *d)
610 struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
611 const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank;
612 void __iomem *base = chip_data->host_data->base;
613 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
615 writel_relaxed(mask, base + stm32_bank->swier_ofst);
620 static struct irq_chip stm32_exti_h_chip = {
621 .name = "stm32-exti-h",
622 .irq_eoi = stm32_exti_h_eoi,
623 .irq_mask = stm32_exti_h_mask,
624 .irq_unmask = stm32_exti_h_unmask,
625 .irq_retrigger = stm32_exti_h_retrigger,
626 .irq_set_type = stm32_exti_h_set_type,
627 .irq_set_wake = stm32_exti_h_set_wake,
628 .flags = IRQCHIP_MASK_ON_SUSPEND,
629 .irq_set_affinity = IS_ENABLED(CONFIG_SMP) ? stm32_exti_h_set_affinity : NULL,
632 static struct irq_chip stm32_exti_h_chip_direct = {
633 .name = "stm32-exti-h-direct",
634 .irq_eoi = irq_chip_eoi_parent,
635 .irq_ack = irq_chip_ack_parent,
636 .irq_mask = irq_chip_mask_parent,
637 .irq_unmask = irq_chip_unmask_parent,
638 .irq_retrigger = irq_chip_retrigger_hierarchy,
639 .irq_set_type = irq_chip_set_type_parent,
640 .irq_set_wake = stm32_exti_h_set_wake,
641 .flags = IRQCHIP_MASK_ON_SUSPEND,
642 .irq_set_affinity = IS_ENABLED(CONFIG_SMP) ? irq_chip_set_affinity_parent : NULL,
645 static int stm32_exti_h_domain_alloc(struct irq_domain *dm,
647 unsigned int nr_irqs, void *data)
649 struct stm32_exti_host_data *host_data = dm->host_data;
650 struct stm32_exti_chip_data *chip_data;
651 const struct stm32_desc_irq *desc;
652 struct irq_fwspec *fwspec = data;
653 struct irq_fwspec p_fwspec;
654 irq_hw_number_t hwirq;
657 hwirq = fwspec->param[0];
658 bank = hwirq / IRQS_PER_BANK;
659 chip_data = &host_data->chips_data[bank];
662 desc = stm32_exti_get_desc(host_data->drv_data, hwirq);
666 irq_domain_set_hwirq_and_chip(dm, virq, hwirq, desc->chip,
668 if (desc->irq_parent) {
669 p_fwspec.fwnode = dm->parent->fwnode;
670 p_fwspec.param_count = 3;
671 p_fwspec.param[0] = GIC_SPI;
672 p_fwspec.param[1] = desc->irq_parent;
673 p_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH;
675 return irq_domain_alloc_irqs_parent(dm, virq, 1, &p_fwspec);
682 stm32_exti_host_data *stm32_exti_host_init(const struct stm32_exti_drv_data *dd,
683 struct device_node *node)
685 struct stm32_exti_host_data *host_data;
687 host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
691 host_data->drv_data = dd;
692 host_data->chips_data = kcalloc(dd->bank_nr,
693 sizeof(struct stm32_exti_chip_data),
695 if (!host_data->chips_data)
698 host_data->base = of_iomap(node, 0);
699 if (!host_data->base) {
700 pr_err("%pOF: Unable to map registers\n", node);
701 goto free_chips_data;
704 stm32_host_data = host_data;
709 kfree(host_data->chips_data);
717 stm32_exti_chip_data *stm32_exti_chip_init(struct stm32_exti_host_data *h_data,
719 struct device_node *node)
721 const struct stm32_exti_bank *stm32_bank;
722 struct stm32_exti_chip_data *chip_data;
723 void __iomem *base = h_data->base;
725 stm32_bank = h_data->drv_data->exti_banks[bank_idx];
726 chip_data = &h_data->chips_data[bank_idx];
727 chip_data->host_data = h_data;
728 chip_data->reg_bank = stm32_bank;
730 raw_spin_lock_init(&chip_data->rlock);
733 * This IP has no reset, so after hot reboot we should
734 * clear registers to avoid residue
736 writel_relaxed(0, base + stm32_bank->imr_ofst);
737 writel_relaxed(0, base + stm32_bank->emr_ofst);
739 pr_info("%pOF: bank%d\n", node, bank_idx);
744 static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data,
745 struct device_node *node)
747 struct stm32_exti_host_data *host_data;
748 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
750 struct irq_chip_generic *gc;
751 struct irq_domain *domain;
753 host_data = stm32_exti_host_init(drv_data, node);
757 domain = irq_domain_add_linear(node, drv_data->bank_nr * IRQS_PER_BANK,
758 &irq_exti_domain_ops, NULL);
760 pr_err("%pOFn: Could not register interrupt domain.\n",
766 ret = irq_alloc_domain_generic_chips(domain, IRQS_PER_BANK, 1, "exti",
767 handle_edge_irq, clr, 0, 0);
769 pr_err("%pOF: Could not allocate generic interrupt chip.\n",
771 goto out_free_domain;
774 for (i = 0; i < drv_data->bank_nr; i++) {
775 const struct stm32_exti_bank *stm32_bank;
776 struct stm32_exti_chip_data *chip_data;
778 stm32_bank = drv_data->exti_banks[i];
779 chip_data = stm32_exti_chip_init(host_data, i, node);
781 gc = irq_get_domain_generic_chip(domain, i * IRQS_PER_BANK);
783 gc->reg_base = host_data->base;
784 gc->chip_types->type = IRQ_TYPE_EDGE_BOTH;
785 gc->chip_types->chip.irq_ack = stm32_irq_ack;
786 gc->chip_types->chip.irq_mask = irq_gc_mask_clr_bit;
787 gc->chip_types->chip.irq_unmask = irq_gc_mask_set_bit;
788 gc->chip_types->chip.irq_set_type = stm32_irq_set_type;
789 gc->chip_types->chip.irq_set_wake = irq_gc_set_wake;
790 gc->suspend = stm32_irq_suspend;
791 gc->resume = stm32_irq_resume;
792 gc->wake_enabled = IRQ_MSK(IRQS_PER_BANK);
794 gc->chip_types->regs.mask = stm32_bank->imr_ofst;
795 gc->private = (void *)chip_data;
798 nr_irqs = of_irq_count(node);
799 for (i = 0; i < nr_irqs; i++) {
800 unsigned int irq = irq_of_parse_and_map(node, i);
802 irq_set_handler_data(irq, domain);
803 irq_set_chained_handler(irq, stm32_irq_handler);
809 irq_domain_remove(domain);
811 iounmap(host_data->base);
812 kfree(host_data->chips_data);
817 static const struct irq_domain_ops stm32_exti_h_domain_ops = {
818 .alloc = stm32_exti_h_domain_alloc,
819 .free = irq_domain_free_irqs_common,
820 .xlate = irq_domain_xlate_twocell,
823 static void stm32_exti_remove_irq(void *data)
825 struct irq_domain *domain = data;
827 irq_domain_remove(domain);
830 static int stm32_exti_remove(struct platform_device *pdev)
832 stm32_exti_h_syscore_deinit();
836 static int stm32_exti_probe(struct platform_device *pdev)
839 struct device *dev = &pdev->dev;
840 struct device_node *np = dev->of_node;
841 struct irq_domain *parent_domain, *domain;
842 struct stm32_exti_host_data *host_data;
843 const struct stm32_exti_drv_data *drv_data;
844 struct resource *res;
846 host_data = devm_kzalloc(dev, sizeof(*host_data), GFP_KERNEL);
850 /* check for optional hwspinlock which may be not available yet */
851 ret = of_hwspin_lock_get_id(np, 0);
852 if (ret == -EPROBE_DEFER)
853 /* hwspinlock framework not yet ready */
857 host_data->hwlock = devm_hwspin_lock_request_specific(dev, ret);
858 if (!host_data->hwlock) {
859 dev_err(dev, "Failed to request hwspinlock\n");
862 } else if (ret != -ENOENT) {
863 /* note: ENOENT is a valid case (means 'no hwspinlock') */
864 dev_err(dev, "Failed to get hwspinlock\n");
868 /* initialize host_data */
869 drv_data = of_device_get_match_data(dev);
871 dev_err(dev, "no of match data\n");
874 host_data->drv_data = drv_data;
876 host_data->chips_data = devm_kcalloc(dev, drv_data->bank_nr,
877 sizeof(*host_data->chips_data),
879 if (!host_data->chips_data)
882 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
883 host_data->base = devm_ioremap_resource(dev, res);
884 if (IS_ERR(host_data->base)) {
885 dev_err(dev, "Unable to map registers\n");
886 return PTR_ERR(host_data->base);
889 for (i = 0; i < drv_data->bank_nr; i++)
890 stm32_exti_chip_init(host_data, i, np);
892 parent_domain = irq_find_host(of_irq_find_parent(np));
893 if (!parent_domain) {
894 dev_err(dev, "GIC interrupt-parent not found\n");
898 domain = irq_domain_add_hierarchy(parent_domain, 0,
899 drv_data->bank_nr * IRQS_PER_BANK,
900 np, &stm32_exti_h_domain_ops,
904 dev_err(dev, "Could not register exti domain\n");
908 ret = devm_add_action_or_reset(dev, stm32_exti_remove_irq, domain);
912 stm32_exti_h_syscore_init(host_data);
917 /* platform driver only for MP1 */
918 static const struct of_device_id stm32_exti_ids[] = {
919 { .compatible = "st,stm32mp1-exti", .data = &stm32mp1_drv_data},
922 MODULE_DEVICE_TABLE(of, stm32_exti_ids);
924 static struct platform_driver stm32_exti_driver = {
925 .probe = stm32_exti_probe,
926 .remove = stm32_exti_remove,
928 .name = "stm32_exti",
929 .of_match_table = stm32_exti_ids,
933 static int __init stm32_exti_arch_init(void)
935 return platform_driver_register(&stm32_exti_driver);
938 static void __exit stm32_exti_arch_exit(void)
940 return platform_driver_unregister(&stm32_exti_driver);
943 arch_initcall(stm32_exti_arch_init);
944 module_exit(stm32_exti_arch_exit);
946 /* no platform driver for F4 and H7 */
947 static int __init stm32f4_exti_of_init(struct device_node *np,
948 struct device_node *parent)
950 return stm32_exti_init(&stm32f4xx_drv_data, np);
953 IRQCHIP_DECLARE(stm32f4_exti, "st,stm32-exti", stm32f4_exti_of_init);
955 static int __init stm32h7_exti_of_init(struct device_node *np,
956 struct device_node *parent)
958 return stm32_exti_init(&stm32h7xx_drv_data, np);
961 IRQCHIP_DECLARE(stm32h7_exti, "st,stm32h7-exti", stm32h7_exti_of_init);