1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Maxime Coquelin 2015
4 * Copyright (C) STMicroelectronics 2017-2024
5 * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com>
6 */
7
8#include <linux/bitops.h>
9#include <linux/hwspinlock.h>
10#include <linux/interrupt.h>
11#include <linux/io.h>
12#include <linux/irq.h>
13#include <linux/irqchip.h>
14#include <linux/irqdomain.h>
15#include <linux/mod_devicetable.h>
16#include <linux/module.h>
17#include <linux/of_address.h>
18#include <linux/of_irq.h>
19#include <linux/platform_device.h>
20#include <linux/pm.h>
21
22#include <dt-bindings/interrupt-controller/arm-gic.h>
23
24#define IRQS_PER_BANK 32
25
26#define HWSPNLCK_TIMEOUT 1000 /* usec */
27
28#define EXTI_EnCIDCFGR(n) (0x180 + (n) * 4)
29#define EXTI_HWCFGR1 0x3f0
30
31/* Register: EXTI_EnCIDCFGR(n) */
32#define EXTI_CIDCFGR_CFEN_MASK BIT(0)
33#define EXTI_CIDCFGR_CID_MASK GENMASK(6, 4)
34#define EXTI_CIDCFGR_CID_SHIFT 4
35
36/* Register: EXTI_HWCFGR1 */
37#define EXTI_HWCFGR1_CIDWIDTH_MASK GENMASK(27, 24)
38
39#define EXTI_CID1 1
40
41struct stm32mp_exti_bank {
42 u32 imr_ofst;
43 u32 rtsr_ofst;
44 u32 ftsr_ofst;
45 u32 swier_ofst;
46 u32 rpr_ofst;
47 u32 fpr_ofst;
48 u32 trg_ofst;
49 u32 seccfgr_ofst;
50};
51
52struct stm32mp_exti_drv_data {
53 const struct stm32mp_exti_bank **exti_banks;
54 const u8 *desc_irqs;
55 u32 bank_nr;
56};
57
58struct stm32mp_exti_chip_data {
59 struct stm32mp_exti_host_data *host_data;
60 const struct stm32mp_exti_bank *reg_bank;
61 struct raw_spinlock rlock;
62 u32 wake_active;
63 u32 mask_cache;
64 u32 rtsr_cache;
65 u32 ftsr_cache;
66 u32 event_reserved;
67};
68
69struct stm32mp_exti_host_data {
70 void __iomem *base;
71 struct device *dev;
72 struct stm32mp_exti_chip_data *chips_data;
73 const struct stm32mp_exti_drv_data *drv_data;
74 struct hwspinlock *hwlock;
75 /* skip internal desc_irqs array and get it from DT */
76 bool dt_has_irqs_desc;
77};
78
79static const struct stm32mp_exti_bank stm32mp_exti_b1 = {
80 .imr_ofst = 0x80,
81 .rtsr_ofst = 0x00,
82 .ftsr_ofst = 0x04,
83 .swier_ofst = 0x08,
84 .rpr_ofst = 0x0C,
85 .fpr_ofst = 0x10,
86 .trg_ofst = 0x3EC,
87 .seccfgr_ofst = 0x14,
88};
89
90static const struct stm32mp_exti_bank stm32mp_exti_b2 = {
91 .imr_ofst = 0x90,
92 .rtsr_ofst = 0x20,
93 .ftsr_ofst = 0x24,
94 .swier_ofst = 0x28,
95 .rpr_ofst = 0x2C,
96 .fpr_ofst = 0x30,
97 .trg_ofst = 0x3E8,
98 .seccfgr_ofst = 0x34,
99};
100
101static const struct stm32mp_exti_bank stm32mp_exti_b3 = {
102 .imr_ofst = 0xA0,
103 .rtsr_ofst = 0x40,
104 .ftsr_ofst = 0x44,
105 .swier_ofst = 0x48,
106 .rpr_ofst = 0x4C,
107 .fpr_ofst = 0x50,
108 .trg_ofst = 0x3E4,
109 .seccfgr_ofst = 0x54,
110};
111
112static const struct stm32mp_exti_bank *stm32mp_exti_banks[] = {
113 &stm32mp_exti_b1,
114 &stm32mp_exti_b2,
115 &stm32mp_exti_b3,
116};
117
118static struct irq_chip stm32mp_exti_chip;
119static struct irq_chip stm32mp_exti_chip_direct;
120
121#define EXTI_INVALID_IRQ U8_MAX
122#define STM32MP_DESC_IRQ_SIZE (ARRAY_SIZE(stm32mp_exti_banks) * IRQS_PER_BANK)
123
124/*
125 * Use some intentionally tricky logic here to initialize the whole array to
126 * EXTI_INVALID_IRQ, but then override certain fields, requiring us to indicate
127 * that we "know" that there are overrides in this structure, and we'll need to
128 * disable that warning from W=1 builds.
129 */
130__diag_push();
131__diag_ignore_all("-Woverride-init",
132 "logic to initialize all and then override some is OK");
133
134static const u8 stm32mp1_desc_irq[] = {
135 /* default value */
136 [0 ... (STM32MP_DESC_IRQ_SIZE - 1)] = EXTI_INVALID_IRQ,
137
138 [0] = 6,
139 [1] = 7,
140 [2] = 8,
141 [3] = 9,
142 [4] = 10,
143 [5] = 23,
144 [6] = 64,
145 [7] = 65,
146 [8] = 66,
147 [9] = 67,
148 [10] = 40,
149 [11] = 42,
150 [12] = 76,
151 [13] = 77,
152 [14] = 121,
153 [15] = 127,
154 [16] = 1,
155 [19] = 3,
156 [21] = 31,
157 [22] = 33,
158 [23] = 72,
159 [24] = 95,
160 [25] = 107,
161 [26] = 37,
162 [27] = 38,
163 [28] = 39,
164 [29] = 71,
165 [30] = 52,
166 [31] = 53,
167 [32] = 82,
168 [33] = 83,
169 [46] = 151,
170 [47] = 93,
171 [48] = 138,
172 [50] = 139,
173 [52] = 140,
174 [53] = 141,
175 [54] = 135,
176 [61] = 100,
177 [65] = 144,
178 [68] = 143,
179 [70] = 62,
180 [73] = 129,
181};
182
183static const u8 stm32mp13_desc_irq[] = {
184 /* default value */
185 [0 ... (STM32MP_DESC_IRQ_SIZE - 1)] = EXTI_INVALID_IRQ,
186
187 [0] = 6,
188 [1] = 7,
189 [2] = 8,
190 [3] = 9,
191 [4] = 10,
192 [5] = 24,
193 [6] = 65,
194 [7] = 66,
195 [8] = 67,
196 [9] = 68,
197 [10] = 41,
198 [11] = 43,
199 [12] = 77,
200 [13] = 78,
201 [14] = 106,
202 [15] = 109,
203 [16] = 1,
204 [19] = 3,
205 [21] = 32,
206 [22] = 34,
207 [23] = 73,
208 [24] = 93,
209 [25] = 114,
210 [26] = 38,
211 [27] = 39,
212 [28] = 40,
213 [29] = 72,
214 [30] = 53,
215 [31] = 54,
216 [32] = 83,
217 [33] = 84,
218 [44] = 96,
219 [47] = 92,
220 [48] = 116,
221 [50] = 117,
222 [52] = 118,
223 [53] = 119,
224 [68] = 63,
225 [70] = 98,
226};
227
228__diag_pop();
229
230static const struct stm32mp_exti_drv_data stm32mp1_drv_data = {
231 .exti_banks = stm32mp_exti_banks,
232 .bank_nr = ARRAY_SIZE(stm32mp_exti_banks),
233 .desc_irqs = stm32mp1_desc_irq,
234};
235
236static const struct stm32mp_exti_drv_data stm32mp13_drv_data = {
237 .exti_banks = stm32mp_exti_banks,
238 .bank_nr = ARRAY_SIZE(stm32mp_exti_banks),
239 .desc_irqs = stm32mp13_desc_irq,
240};
241
242static int stm32mp_exti_convert_type(struct irq_data *d, unsigned int type, u32 *rtsr, u32 *ftsr)
243{
244 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
245
246 switch (type) {
247 case IRQ_TYPE_EDGE_RISING:
248 *rtsr |= mask;
249 *ftsr &= ~mask;
250 break;
251 case IRQ_TYPE_EDGE_FALLING:
252 *rtsr &= ~mask;
253 *ftsr |= mask;
254 break;
255 case IRQ_TYPE_EDGE_BOTH:
256 *rtsr |= mask;
257 *ftsr |= mask;
258 break;
259 default:
260 return -EINVAL;
261 }
262
263 return 0;
264}
265
266static void stm32mp_chip_suspend(struct stm32mp_exti_chip_data *chip_data, u32 wake_active)
267{
268 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
269 void __iomem *base = chip_data->host_data->base;
270
271 /* save rtsr, ftsr registers */
272 chip_data->rtsr_cache = readl_relaxed(base + bank->rtsr_ofst);
273 chip_data->ftsr_cache = readl_relaxed(base + bank->ftsr_ofst);
274
275 writel_relaxed(wake_active, base + bank->imr_ofst);
276}
277
278static void stm32mp_chip_resume(struct stm32mp_exti_chip_data *chip_data, u32 mask_cache)
279{
280 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
281 void __iomem *base = chip_data->host_data->base;
282
283 /* restore rtsr, ftsr, registers */
284 writel_relaxed(chip_data->rtsr_cache, base + bank->rtsr_ofst);
285 writel_relaxed(chip_data->ftsr_cache, base + bank->ftsr_ofst);
286
287 writel_relaxed(mask_cache, base + bank->imr_ofst);
288}
289
290/* directly set the target bit without reading first. */
291static inline void stm32mp_exti_write_bit(struct irq_data *d, u32 reg)
292{
293 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
294 void __iomem *base = chip_data->host_data->base;
295 u32 val = BIT(d->hwirq % IRQS_PER_BANK);
296
297 writel_relaxed(val, base + reg);
298}
299
300static inline u32 stm32mp_exti_set_bit(struct irq_data *d, u32 reg)
301{
302 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
303 void __iomem *base = chip_data->host_data->base;
304 u32 val;
305
306 val = readl_relaxed(base + reg);
307 val |= BIT(d->hwirq % IRQS_PER_BANK);
308 writel_relaxed(val, base + reg);
309
310 return val;
311}
312
313static inline u32 stm32mp_exti_clr_bit(struct irq_data *d, u32 reg)
314{
315 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
316 void __iomem *base = chip_data->host_data->base;
317 u32 val;
318
319 val = readl_relaxed(base + reg);
320 val &= ~BIT(d->hwirq % IRQS_PER_BANK);
321 writel_relaxed(val, base + reg);
322
323 return val;
324}
325
326static void stm32mp_exti_eoi(struct irq_data *d)
327{
328 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
329 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
330
331 raw_spin_lock(&chip_data->rlock);
332
333 stm32mp_exti_write_bit(d, reg: bank->rpr_ofst);
334 stm32mp_exti_write_bit(d, reg: bank->fpr_ofst);
335
336 raw_spin_unlock(&chip_data->rlock);
337
338 if (d->parent_data->chip)
339 irq_chip_eoi_parent(data: d);
340}
341
342static void stm32mp_exti_mask(struct irq_data *d)
343{
344 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
345 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
346
347 raw_spin_lock(&chip_data->rlock);
348 chip_data->mask_cache = stm32mp_exti_clr_bit(d, reg: bank->imr_ofst);
349 raw_spin_unlock(&chip_data->rlock);
350
351 if (d->parent_data->chip)
352 irq_chip_mask_parent(data: d);
353}
354
355static void stm32mp_exti_unmask(struct irq_data *d)
356{
357 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
358 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
359
360 raw_spin_lock(&chip_data->rlock);
361 chip_data->mask_cache = stm32mp_exti_set_bit(d, reg: bank->imr_ofst);
362 raw_spin_unlock(&chip_data->rlock);
363
364 if (d->parent_data->chip)
365 irq_chip_unmask_parent(data: d);
366}
367
368static int stm32mp_exti_set_type(struct irq_data *d, unsigned int type)
369{
370 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
371 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
372 struct hwspinlock *hwlock = chip_data->host_data->hwlock;
373 void __iomem *base = chip_data->host_data->base;
374 u32 rtsr, ftsr;
375 int err;
376
377 raw_spin_lock(&chip_data->rlock);
378
379 if (hwlock) {
380 err = hwspin_lock_timeout_in_atomic(hwlock, HWSPNLCK_TIMEOUT);
381 if (err) {
382 pr_err("%s can't get hwspinlock (%d)\n", __func__, err);
383 goto unlock;
384 }
385 }
386
387 rtsr = readl_relaxed(base + bank->rtsr_ofst);
388 ftsr = readl_relaxed(base + bank->ftsr_ofst);
389
390 err = stm32mp_exti_convert_type(d, type, rtsr: &rtsr, ftsr: &ftsr);
391 if (!err) {
392 writel_relaxed(rtsr, base + bank->rtsr_ofst);
393 writel_relaxed(ftsr, base + bank->ftsr_ofst);
394 }
395
396 if (hwlock)
397 hwspin_unlock_in_atomic(hwlock);
398unlock:
399 raw_spin_unlock(&chip_data->rlock);
400 return err;
401}
402
403static int stm32mp_exti_set_wake(struct irq_data *d, unsigned int on)
404{
405 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
406 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
407
408 raw_spin_lock(&chip_data->rlock);
409
410 if (on)
411 chip_data->wake_active |= mask;
412 else
413 chip_data->wake_active &= ~mask;
414
415 raw_spin_unlock(&chip_data->rlock);
416
417 return 0;
418}
419
420static int stm32mp_exti_set_affinity(struct irq_data *d, const struct cpumask *dest, bool force)
421{
422 if (d->parent_data->chip)
423 return irq_chip_set_affinity_parent(data: d, dest, force);
424
425 return IRQ_SET_MASK_OK_DONE;
426}
427
428static int stm32mp_exti_suspend(struct device *dev)
429{
430 struct stm32mp_exti_host_data *host_data = dev_get_drvdata(dev);
431 struct stm32mp_exti_chip_data *chip_data;
432 int i;
433
434 for (i = 0; i < host_data->drv_data->bank_nr; i++) {
435 chip_data = &host_data->chips_data[i];
436 stm32mp_chip_suspend(chip_data, wake_active: chip_data->wake_active);
437 }
438
439 return 0;
440}
441
442static int stm32mp_exti_resume(struct device *dev)
443{
444 struct stm32mp_exti_host_data *host_data = dev_get_drvdata(dev);
445 struct stm32mp_exti_chip_data *chip_data;
446 int i;
447
448 for (i = 0; i < host_data->drv_data->bank_nr; i++) {
449 chip_data = &host_data->chips_data[i];
450 stm32mp_chip_resume(chip_data, mask_cache: chip_data->mask_cache);
451 }
452
453 return 0;
454}
455
456static int stm32mp_exti_retrigger(struct irq_data *d)
457{
458 struct stm32mp_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
459 const struct stm32mp_exti_bank *bank = chip_data->reg_bank;
460 void __iomem *base = chip_data->host_data->base;
461 u32 mask = BIT(d->hwirq % IRQS_PER_BANK);
462
463 writel_relaxed(mask, base + bank->swier_ofst);
464
465 return 0;
466}
467
468static struct irq_chip stm32mp_exti_chip = {
469 .name = "stm32mp-exti",
470 .irq_eoi = stm32mp_exti_eoi,
471 .irq_mask = stm32mp_exti_mask,
472 .irq_unmask = stm32mp_exti_unmask,
473 .irq_retrigger = stm32mp_exti_retrigger,
474 .irq_set_type = stm32mp_exti_set_type,
475 .irq_set_wake = stm32mp_exti_set_wake,
476 .flags = IRQCHIP_MASK_ON_SUSPEND,
477 .irq_set_affinity = IS_ENABLED(CONFIG_SMP) ? stm32mp_exti_set_affinity : NULL,
478};
479
480static struct irq_chip stm32mp_exti_chip_direct = {
481 .name = "stm32mp-exti-direct",
482 .irq_eoi = irq_chip_eoi_parent,
483 .irq_ack = irq_chip_ack_parent,
484 .irq_mask = stm32mp_exti_mask,
485 .irq_unmask = stm32mp_exti_unmask,
486 .irq_retrigger = irq_chip_retrigger_hierarchy,
487 .irq_set_type = irq_chip_set_type_parent,
488 .irq_set_wake = stm32mp_exti_set_wake,
489 .flags = IRQCHIP_MASK_ON_SUSPEND,
490 .irq_set_affinity = IS_ENABLED(CONFIG_SMP) ? irq_chip_set_affinity_parent : NULL,
491};
492
493static int stm32mp_exti_domain_alloc(struct irq_domain *dm,
494 unsigned int virq,
495 unsigned int nr_irqs, void *data)
496{
497 struct stm32mp_exti_host_data *host_data = dm->host_data;
498 struct stm32mp_exti_chip_data *chip_data;
499 struct irq_fwspec *fwspec = data;
500 struct irq_fwspec p_fwspec;
501 irq_hw_number_t hwirq;
502 struct irq_chip *chip;
503 u32 event_trg;
504 u8 desc_irq;
505 int bank;
506
507 hwirq = fwspec->param[0];
508 if (hwirq >= host_data->drv_data->bank_nr * IRQS_PER_BANK)
509 return -EINVAL;
510
511 bank = hwirq / IRQS_PER_BANK;
512 chip_data = &host_data->chips_data[bank];
513
514 /* Check if event is reserved (Secure) */
515 if (chip_data->event_reserved & BIT(hwirq % IRQS_PER_BANK)) {
516 dev_err(host_data->dev, "event %lu is reserved, secure\n", hwirq);
517 return -EPERM;
518 }
519
520 event_trg = readl_relaxed(host_data->base + chip_data->reg_bank->trg_ofst);
521 chip = (event_trg & BIT(hwirq % IRQS_PER_BANK)) ?
522 &stm32mp_exti_chip : &stm32mp_exti_chip_direct;
523
524 irq_domain_set_hwirq_and_chip(domain: dm, virq, hwirq, chip, chip_data);
525
526 if (host_data->dt_has_irqs_desc) {
527 struct of_phandle_args out_irq;
528 int ret;
529
530 ret = of_irq_parse_one(device: host_data->dev->of_node, index: hwirq, out_irq: &out_irq);
531 if (ret)
532 return ret;
533 /* we only support one parent, so far */
534 if (of_fwnode_handle(out_irq.np) != dm->parent->fwnode)
535 return -EINVAL;
536
537 of_phandle_args_to_fwspec(np: out_irq.np, args: out_irq.args,
538 count: out_irq.args_count, fwspec: &p_fwspec);
539
540 return irq_domain_alloc_irqs_parent(domain: dm, irq_base: virq, nr_irqs: 1, arg: &p_fwspec);
541 }
542
543 if (!host_data->drv_data->desc_irqs)
544 return -EINVAL;
545
546 desc_irq = host_data->drv_data->desc_irqs[hwirq];
547 if (desc_irq != EXTI_INVALID_IRQ) {
548 p_fwspec.fwnode = dm->parent->fwnode;
549 p_fwspec.param_count = 3;
550 p_fwspec.param[0] = GIC_SPI;
551 p_fwspec.param[1] = desc_irq;
552 p_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH;
553
554 return irq_domain_alloc_irqs_parent(domain: dm, irq_base: virq, nr_irqs: 1, arg: &p_fwspec);
555 }
556
557 return 0;
558}
559
560static struct stm32mp_exti_chip_data *stm32mp_exti_chip_init(struct stm32mp_exti_host_data *h_data,
561 u32 bank_idx, struct device_node *node)
562{
563 struct stm32mp_exti_chip_data *chip_data;
564 const struct stm32mp_exti_bank *bank;
565 void __iomem *base = h_data->base;
566
567 bank = h_data->drv_data->exti_banks[bank_idx];
568 chip_data = &h_data->chips_data[bank_idx];
569 chip_data->host_data = h_data;
570 chip_data->reg_bank = bank;
571
572 raw_spin_lock_init(&chip_data->rlock);
573
574 /*
575 * This IP has no reset, so after hot reboot we should
576 * clear registers to avoid residue
577 */
578 writel_relaxed(0, base + bank->imr_ofst);
579
580 /* reserve Secure events */
581 chip_data->event_reserved = readl_relaxed(base + bank->seccfgr_ofst);
582
583 pr_info("%pOF: bank%d\n", node, bank_idx);
584
585 return chip_data;
586}
587
588static const struct irq_domain_ops stm32mp_exti_domain_ops = {
589 .alloc = stm32mp_exti_domain_alloc,
590 .free = irq_domain_free_irqs_common,
591 .xlate = irq_domain_xlate_twocell,
592};
593
594static void stm32mp_exti_check_rif(struct stm32mp_exti_host_data *host_data)
595{
596 unsigned int bank, i, event;
597 u32 cid, cidcfgr, hwcfgr1;
598
599 /* quit on CID not supported */
600 hwcfgr1 = readl_relaxed(host_data->base + EXTI_HWCFGR1);
601 if ((hwcfgr1 & EXTI_HWCFGR1_CIDWIDTH_MASK) == 0)
602 return;
603
604 for (bank = 0; bank < host_data->drv_data->bank_nr; bank++) {
605 for (i = 0; i < IRQS_PER_BANK; i++) {
606 event = bank * IRQS_PER_BANK + i;
607 cidcfgr = readl_relaxed(host_data->base + EXTI_EnCIDCFGR(event));
608 cid = (cidcfgr & EXTI_CIDCFGR_CID_MASK) >> EXTI_CIDCFGR_CID_SHIFT;
609 if ((cidcfgr & EXTI_CIDCFGR_CFEN_MASK) && cid != EXTI_CID1)
610 host_data->chips_data[bank].event_reserved |= BIT(i);
611 }
612 }
613}
614
615static void stm32mp_exti_remove_irq(void *data)
616{
617 struct irq_domain *domain = data;
618
619 irq_domain_remove(domain);
620}
621
622static int stm32mp_exti_probe(struct platform_device *pdev)
623{
624 const struct stm32mp_exti_drv_data *drv_data;
625 struct irq_domain *parent_domain, *domain;
626 struct stm32mp_exti_host_data *host_data;
627 struct device *dev = &pdev->dev;
628 struct device_node *np = dev->of_node;
629 int ret, i;
630
631 host_data = devm_kzalloc(dev, size: sizeof(*host_data), GFP_KERNEL);
632 if (!host_data)
633 return -ENOMEM;
634
635 dev_set_drvdata(dev, data: host_data);
636 host_data->dev = dev;
637
638 /* check for optional hwspinlock which may be not available yet */
639 ret = of_hwspin_lock_get_id(np, index: 0);
640 if (ret == -EPROBE_DEFER)
641 /* hwspinlock framework not yet ready */
642 return ret;
643
644 if (ret >= 0) {
645 host_data->hwlock = devm_hwspin_lock_request_specific(dev, id: ret);
646 if (!host_data->hwlock) {
647 dev_err(dev, "Failed to request hwspinlock\n");
648 return -EINVAL;
649 }
650 } else if (ret != -ENOENT) {
651 /* note: ENOENT is a valid case (means 'no hwspinlock') */
652 dev_err(dev, "Failed to get hwspinlock\n");
653 return ret;
654 }
655
656 /* initialize host_data */
657 drv_data = of_device_get_match_data(dev);
658 if (!drv_data) {
659 dev_err(dev, "no of match data\n");
660 return -ENODEV;
661 }
662 host_data->drv_data = drv_data;
663
664 host_data->chips_data = devm_kcalloc(dev, n: drv_data->bank_nr,
665 size: sizeof(*host_data->chips_data),
666 GFP_KERNEL);
667 if (!host_data->chips_data)
668 return -ENOMEM;
669
670 host_data->base = devm_platform_ioremap_resource(pdev, index: 0);
671 if (IS_ERR(ptr: host_data->base))
672 return PTR_ERR(ptr: host_data->base);
673
674 for (i = 0; i < drv_data->bank_nr; i++)
675 stm32mp_exti_chip_init(h_data: host_data, bank_idx: i, node: np);
676
677 stm32mp_exti_check_rif(host_data);
678
679 parent_domain = irq_find_host(node: of_irq_find_parent(child: np));
680 if (!parent_domain) {
681 dev_err(dev, "GIC interrupt-parent not found\n");
682 return -EINVAL;
683 }
684
685 domain = irq_domain_create_hierarchy(parent: parent_domain, flags: 0, size: drv_data->bank_nr * IRQS_PER_BANK,
686 of_fwnode_handle(np), ops: &stm32mp_exti_domain_ops,
687 host_data);
688
689 if (!domain) {
690 dev_err(dev, "Could not register exti domain\n");
691 return -ENOMEM;
692 }
693
694 ret = devm_add_action_or_reset(dev, stm32mp_exti_remove_irq, domain);
695 if (ret)
696 return ret;
697
698 host_data->dt_has_irqs_desc = of_property_present(np, propname: "interrupts-extended");
699
700 return 0;
701}
702
703static const struct of_device_id stm32mp_exti_ids[] = {
704 { .compatible = "st,stm32mp1-exti", .data = &stm32mp1_drv_data},
705 { .compatible = "st,stm32mp13-exti", .data = &stm32mp13_drv_data},
706 {},
707};
708MODULE_DEVICE_TABLE(of, stm32mp_exti_ids);
709
710static const struct dev_pm_ops stm32mp_exti_dev_pm_ops = {
711 NOIRQ_SYSTEM_SLEEP_PM_OPS(stm32mp_exti_suspend, stm32mp_exti_resume)
712};
713
714static struct platform_driver stm32mp_exti_driver = {
715 .probe = stm32mp_exti_probe,
716 .driver = {
717 .name = "stm32mp_exti",
718 .of_match_table = stm32mp_exti_ids,
719 .pm = &stm32mp_exti_dev_pm_ops,
720 },
721};
722
723module_platform_driver(stm32mp_exti_driver);
724
725MODULE_AUTHOR("Maxime Coquelin <mcoquelin.stm32@gmail.com>");
726MODULE_DESCRIPTION("STM32MP EXTI driver");
727MODULE_LICENSE("GPL");
728

source code of linux/drivers/irqchip/irq-stm32mp-exti.c