1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Texas Instruments' K3 Interrupt Aggregator irqchip driver
4  *
5  * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
6  *	Lokesh Vutla <lokeshvutla@ti.com>
7  */
8 
9 #include <linux/err.h>
10 #include <linux/io.h>
11 #include <linux/irqchip.h>
12 #include <linux/irqdomain.h>
13 #include <linux/interrupt.h>
14 #include <linux/msi.h>
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/of_address.h>
18 #include <linux/of_irq.h>
19 #include <linux/of_platform.h>
20 #include <linux/irqchip/chained_irq.h>
21 #include <linux/soc/ti/ti_sci_inta_msi.h>
22 #include <linux/soc/ti/ti_sci_protocol.h>
23 #include <asm-generic/msi.h>
24 
25 #define TI_SCI_DEV_ID_MASK	0xffff
26 #define TI_SCI_DEV_ID_SHIFT	16
27 #define TI_SCI_IRQ_ID_MASK	0xffff
28 #define TI_SCI_IRQ_ID_SHIFT	0
29 #define HWIRQ_TO_DEVID(hwirq)	(((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
30 				 (TI_SCI_DEV_ID_MASK))
31 #define HWIRQ_TO_IRQID(hwirq)	((hwirq) & (TI_SCI_IRQ_ID_MASK))
32 #define TO_HWIRQ(dev, index)	((((dev) & TI_SCI_DEV_ID_MASK) << \
33 				 TI_SCI_DEV_ID_SHIFT) | \
34 				((index) & TI_SCI_IRQ_ID_MASK))
35 
36 #define MAX_EVENTS_PER_VINT	64
37 #define VINT_ENABLE_SET_OFFSET	0x0
38 #define VINT_ENABLE_CLR_OFFSET	0x8
39 #define VINT_STATUS_OFFSET	0x18
40 
41 /**
42  * struct ti_sci_inta_event_desc - Description of an event coming to
43  *				   Interrupt Aggregator. This serves
44  *				   as a mapping table for global event,
45  *				   hwirq and vint bit.
46  * @global_event:	Global event number corresponding to this event
47  * @hwirq:		Hwirq of the incoming interrupt
48  * @vint_bit:		Corresponding vint bit to which this event is attached.
49  */
50 struct ti_sci_inta_event_desc {
51 	u16 global_event;
52 	u32 hwirq;
53 	u8 vint_bit;
54 };
55 
56 /**
57  * struct ti_sci_inta_vint_desc - Description of a virtual interrupt coming out
58  *				  of Interrupt Aggregator.
59  * @domain:		Pointer to IRQ domain to which this vint belongs.
60  * @list:		List entry for the vint list
61  * @event_map:		Bitmap to manage the allocation of events to vint.
62  * @events:		Array of event descriptors assigned to this vint.
63  * @parent_virq:	Linux IRQ number that gets attached to parent
64  * @vint_id:		TISCI vint ID
65  */
66 struct ti_sci_inta_vint_desc {
67 	struct irq_domain *domain;
68 	struct list_head list;
69 	DECLARE_BITMAP(event_map, MAX_EVENTS_PER_VINT);
70 	struct ti_sci_inta_event_desc events[MAX_EVENTS_PER_VINT];
71 	unsigned int parent_virq;
72 	u16 vint_id;
73 };
74 
75 /**
76  * struct ti_sci_inta_irq_domain - Structure representing a TISCI based
77  *				   Interrupt Aggregator IRQ domain.
78  * @sci:		Pointer to TISCI handle
79  * @vint:		TISCI resource pointer representing IA inerrupts.
80  * @global_event:	TISCI resource pointer representing global events.
81  * @vint_list:		List of the vints active in the system
82  * @vint_mutex:		Mutex to protect vint_list
83  * @base:		Base address of the memory mapped IO registers
84  * @pdev:		Pointer to platform device.
85  */
86 struct ti_sci_inta_irq_domain {
87 	const struct ti_sci_handle *sci;
88 	struct ti_sci_resource *vint;
89 	struct ti_sci_resource *global_event;
90 	struct list_head vint_list;
91 	/* Mutex to protect vint list */
92 	struct mutex vint_mutex;
93 	void __iomem *base;
94 	struct platform_device *pdev;
95 };
96 
97 #define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
98 					events[i])
99 
100 /**
101  * ti_sci_inta_irq_handler() - Chained IRQ handler for the vint irqs
102  * @desc:	Pointer to irq_desc corresponding to the irq
103  */
104 static void ti_sci_inta_irq_handler(struct irq_desc *desc)
105 {
106 	struct ti_sci_inta_vint_desc *vint_desc;
107 	struct ti_sci_inta_irq_domain *inta;
108 	struct irq_domain *domain;
109 	unsigned int virq, bit;
110 	unsigned long val;
111 
112 	vint_desc = irq_desc_get_handler_data(desc);
113 	domain = vint_desc->domain;
114 	inta = domain->host_data;
115 
116 	chained_irq_enter(irq_desc_get_chip(desc), desc);
117 
118 	val = readq_relaxed(inta->base + vint_desc->vint_id * 0x1000 +
119 			    VINT_STATUS_OFFSET);
120 
121 	for_each_set_bit(bit, &val, MAX_EVENTS_PER_VINT) {
122 		virq = irq_find_mapping(domain, vint_desc->events[bit].hwirq);
123 		if (virq)
124 			generic_handle_irq(virq);
125 	}
126 
127 	chained_irq_exit(irq_desc_get_chip(desc), desc);
128 }
129 
130 /**
131  * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
132  * @domain:	IRQ domain corresponding to Interrupt Aggregator
133  *
134  * Return 0 if all went well else corresponding error value.
135  */
136 static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_domain *domain)
137 {
138 	struct ti_sci_inta_irq_domain *inta = domain->host_data;
139 	struct ti_sci_inta_vint_desc *vint_desc;
140 	struct irq_fwspec parent_fwspec;
141 	unsigned int parent_virq;
142 	u16 vint_id;
143 
144 	vint_id = ti_sci_get_free_resource(inta->vint);
145 	if (vint_id == TI_SCI_RESOURCE_NULL)
146 		return ERR_PTR(-EINVAL);
147 
148 	vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
149 	if (!vint_desc)
150 		return ERR_PTR(-ENOMEM);
151 
152 	vint_desc->domain = domain;
153 	vint_desc->vint_id = vint_id;
154 	INIT_LIST_HEAD(&vint_desc->list);
155 
156 	parent_fwspec.fwnode = of_node_to_fwnode(of_irq_find_parent(dev_of_node(&inta->pdev->dev)));
157 	parent_fwspec.param_count = 2;
158 	parent_fwspec.param[0] = inta->pdev->id;
159 	parent_fwspec.param[1] = vint_desc->vint_id;
160 
161 	parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
162 	if (parent_virq <= 0) {
163 		kfree(vint_desc);
164 		return ERR_PTR(parent_virq);
165 	}
166 	vint_desc->parent_virq = parent_virq;
167 
168 	list_add_tail(&vint_desc->list, &inta->vint_list);
169 	irq_set_chained_handler_and_data(vint_desc->parent_virq,
170 					 ti_sci_inta_irq_handler, vint_desc);
171 
172 	return vint_desc;
173 }
174 
175 /**
176  * ti_sci_inta_alloc_event() - Attach an event to a IA vint.
177  * @vint_desc:	Pointer to vint_desc to which the event gets attached
178  * @free_bit:	Bit inside vint to which event gets attached
179  * @hwirq:	hwirq of the input event
180  *
181  * Return event_desc pointer if all went ok else appropriate error value.
182  */
183 static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_event(struct ti_sci_inta_vint_desc *vint_desc,
184 							      u16 free_bit,
185 							      u32 hwirq)
186 {
187 	struct ti_sci_inta_irq_domain *inta = vint_desc->domain->host_data;
188 	struct ti_sci_inta_event_desc *event_desc;
189 	u16 dev_id, dev_index;
190 	int err;
191 
192 	dev_id = HWIRQ_TO_DEVID(hwirq);
193 	dev_index = HWIRQ_TO_IRQID(hwirq);
194 
195 	event_desc = &vint_desc->events[free_bit];
196 	event_desc->hwirq = hwirq;
197 	event_desc->vint_bit = free_bit;
198 	event_desc->global_event = ti_sci_get_free_resource(inta->global_event);
199 	if (event_desc->global_event == TI_SCI_RESOURCE_NULL)
200 		return ERR_PTR(-EINVAL);
201 
202 	err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,
203 						      dev_id, dev_index,
204 						      inta->pdev->id,
205 						      vint_desc->vint_id,
206 						      event_desc->global_event,
207 						      free_bit);
208 	if (err)
209 		goto free_global_event;
210 
211 	return event_desc;
212 free_global_event:
213 	ti_sci_release_resource(inta->global_event, event_desc->global_event);
214 	return ERR_PTR(err);
215 }
216 
217 /**
218  * ti_sci_inta_alloc_irq() -  Allocate an irq within INTA domain
219  * @domain:	irq_domain pointer corresponding to INTA
220  * @hwirq:	hwirq of the input event
221  *
222  * Note: Allocation happens in the following manner:
223  *	- Find a free bit available in any of the vints available in the list.
224  *	- If not found, allocate a vint from the vint pool
225  *	- Attach the free bit to input hwirq.
226  * Return event_desc if all went ok else appropriate error value.
227  */
228 static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_irq(struct irq_domain *domain,
229 							    u32 hwirq)
230 {
231 	struct ti_sci_inta_irq_domain *inta = domain->host_data;
232 	struct ti_sci_inta_vint_desc *vint_desc = NULL;
233 	struct ti_sci_inta_event_desc *event_desc;
234 	u16 free_bit;
235 
236 	mutex_lock(&inta->vint_mutex);
237 	list_for_each_entry(vint_desc, &inta->vint_list, list) {
238 		free_bit = find_first_zero_bit(vint_desc->event_map,
239 					       MAX_EVENTS_PER_VINT);
240 		if (free_bit != MAX_EVENTS_PER_VINT) {
241 			set_bit(free_bit, vint_desc->event_map);
242 			goto alloc_event;
243 		}
244 	}
245 
246 	/* No free bits available. Allocate a new vint */
247 	vint_desc = ti_sci_inta_alloc_parent_irq(domain);
248 	if (IS_ERR(vint_desc)) {
249 		mutex_unlock(&inta->vint_mutex);
250 		return ERR_PTR(PTR_ERR(vint_desc));
251 	}
252 
253 	free_bit = find_first_zero_bit(vint_desc->event_map,
254 				       MAX_EVENTS_PER_VINT);
255 	set_bit(free_bit, vint_desc->event_map);
256 
257 alloc_event:
258 	event_desc = ti_sci_inta_alloc_event(vint_desc, free_bit, hwirq);
259 	if (IS_ERR(event_desc))
260 		clear_bit(free_bit, vint_desc->event_map);
261 
262 	mutex_unlock(&inta->vint_mutex);
263 	return event_desc;
264 }
265 
266 /**
267  * ti_sci_inta_free_parent_irq() - Free a parent irq to INTA
268  * @inta:	Pointer to inta domain.
269  * @vint_desc:	Pointer to vint_desc that needs to be freed.
270  */
271 static void ti_sci_inta_free_parent_irq(struct ti_sci_inta_irq_domain *inta,
272 					struct ti_sci_inta_vint_desc *vint_desc)
273 {
274 	if (find_first_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT) == MAX_EVENTS_PER_VINT) {
275 		list_del(&vint_desc->list);
276 		ti_sci_release_resource(inta->vint, vint_desc->vint_id);
277 		irq_dispose_mapping(vint_desc->parent_virq);
278 		kfree(vint_desc);
279 	}
280 }
281 
282 /**
283  * ti_sci_inta_free_irq() - Free an IRQ within INTA domain
284  * @event_desc:	Pointer to event_desc that needs to be freed.
285  * @hwirq:	Hwirq number within INTA domain that needs to be freed
286  */
287 static void ti_sci_inta_free_irq(struct ti_sci_inta_event_desc *event_desc,
288 				 u32 hwirq)
289 {
290 	struct ti_sci_inta_vint_desc *vint_desc;
291 	struct ti_sci_inta_irq_domain *inta;
292 
293 	vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
294 	inta = vint_desc->domain->host_data;
295 	/* free event irq */
296 	mutex_lock(&inta->vint_mutex);
297 	inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
298 						 HWIRQ_TO_DEVID(hwirq),
299 						 HWIRQ_TO_IRQID(hwirq),
300 						 inta->pdev->id,
301 						 vint_desc->vint_id,
302 						 event_desc->global_event,
303 						 event_desc->vint_bit);
304 
305 	clear_bit(event_desc->vint_bit, vint_desc->event_map);
306 	ti_sci_release_resource(inta->global_event, event_desc->global_event);
307 	event_desc->global_event = TI_SCI_RESOURCE_NULL;
308 	event_desc->hwirq = 0;
309 
310 	ti_sci_inta_free_parent_irq(inta, vint_desc);
311 	mutex_unlock(&inta->vint_mutex);
312 }
313 
314 /**
315  * ti_sci_inta_request_resources() - Allocate resources for input irq
316  * @data: Pointer to corresponding irq_data
317  *
318  * Note: This is the core api where the actual allocation happens for input
319  *	 hwirq. This allocation involves creating a parent irq for vint.
320  *	 If this is done in irq_domain_ops.alloc() then a deadlock is reached
321  *	 for allocation. So this allocation is being done in request_resources()
322  *
323  * Return: 0 if all went well else corresponding error.
324  */
325 static int ti_sci_inta_request_resources(struct irq_data *data)
326 {
327 	struct ti_sci_inta_event_desc *event_desc;
328 
329 	event_desc = ti_sci_inta_alloc_irq(data->domain, data->hwirq);
330 	if (IS_ERR(event_desc))
331 		return PTR_ERR(event_desc);
332 
333 	data->chip_data = event_desc;
334 
335 	return 0;
336 }
337 
338 /**
339  * ti_sci_inta_release_resources - Release resources for input irq
340  * @data: Pointer to corresponding irq_data
341  *
342  * Note: Corresponding to request_resources(), all the unmapping and deletion
343  *	 of parent vint irqs happens in this api.
344  */
345 static void ti_sci_inta_release_resources(struct irq_data *data)
346 {
347 	struct ti_sci_inta_event_desc *event_desc;
348 
349 	event_desc = irq_data_get_irq_chip_data(data);
350 	ti_sci_inta_free_irq(event_desc, data->hwirq);
351 }
352 
353 /**
354  * ti_sci_inta_manage_event() - Control the event based on the offset
355  * @data:	Pointer to corresponding irq_data
356  * @offset:	register offset using which event is controlled.
357  */
358 static void ti_sci_inta_manage_event(struct irq_data *data, u32 offset)
359 {
360 	struct ti_sci_inta_event_desc *event_desc;
361 	struct ti_sci_inta_vint_desc *vint_desc;
362 	struct ti_sci_inta_irq_domain *inta;
363 
364 	event_desc = irq_data_get_irq_chip_data(data);
365 	vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
366 	inta = data->domain->host_data;
367 
368 	writeq_relaxed(BIT(event_desc->vint_bit),
369 		       inta->base + vint_desc->vint_id * 0x1000 + offset);
370 }
371 
372 /**
373  * ti_sci_inta_mask_irq() - Mask an event
374  * @data:	Pointer to corresponding irq_data
375  */
376 static void ti_sci_inta_mask_irq(struct irq_data *data)
377 {
378 	ti_sci_inta_manage_event(data, VINT_ENABLE_CLR_OFFSET);
379 }
380 
381 /**
382  * ti_sci_inta_unmask_irq() - Unmask an event
383  * @data:	Pointer to corresponding irq_data
384  */
385 static void ti_sci_inta_unmask_irq(struct irq_data *data)
386 {
387 	ti_sci_inta_manage_event(data, VINT_ENABLE_SET_OFFSET);
388 }
389 
390 /**
391  * ti_sci_inta_ack_irq() - Ack an event
392  * @data:	Pointer to corresponding irq_data
393  */
394 static void ti_sci_inta_ack_irq(struct irq_data *data)
395 {
396 	/*
397 	 * Do not clear the event if hardware is capable of sending
398 	 * a down event.
399 	 */
400 	if (irqd_get_trigger_type(data) != IRQF_TRIGGER_HIGH)
401 		ti_sci_inta_manage_event(data, VINT_STATUS_OFFSET);
402 }
403 
404 static int ti_sci_inta_set_affinity(struct irq_data *d,
405 				    const struct cpumask *mask_val, bool force)
406 {
407 	return -EINVAL;
408 }
409 
410 /**
411  * ti_sci_inta_set_type() - Update the trigger type of the irq.
412  * @data:	Pointer to corresponding irq_data
413  * @type:	Trigger type as specified by user
414  *
415  * Note: This updates the handle_irq callback for level msi.
416  *
417  * Return 0 if all went well else appropriate error.
418  */
419 static int ti_sci_inta_set_type(struct irq_data *data, unsigned int type)
420 {
421 	/*
422 	 * .alloc default sets handle_edge_irq. But if the user specifies
423 	 * that IRQ is level MSI, then update the handle to handle_level_irq
424 	 */
425 	switch (type & IRQ_TYPE_SENSE_MASK) {
426 	case IRQF_TRIGGER_HIGH:
427 		irq_set_handler_locked(data, handle_level_irq);
428 		return 0;
429 	case IRQF_TRIGGER_RISING:
430 		return 0;
431 	default:
432 		return -EINVAL;
433 	}
434 
435 	return -EINVAL;
436 }
437 
438 static struct irq_chip ti_sci_inta_irq_chip = {
439 	.name			= "INTA",
440 	.irq_ack		= ti_sci_inta_ack_irq,
441 	.irq_mask		= ti_sci_inta_mask_irq,
442 	.irq_set_type		= ti_sci_inta_set_type,
443 	.irq_unmask		= ti_sci_inta_unmask_irq,
444 	.irq_set_affinity	= ti_sci_inta_set_affinity,
445 	.irq_request_resources	= ti_sci_inta_request_resources,
446 	.irq_release_resources	= ti_sci_inta_release_resources,
447 };
448 
449 /**
450  * ti_sci_inta_irq_domain_free() - Free an IRQ from the IRQ domain
451  * @domain:	Domain to which the irqs belong
452  * @virq:	base linux virtual IRQ to be freed.
453  * @nr_irqs:	Number of continuous irqs to be freed
454  */
455 static void ti_sci_inta_irq_domain_free(struct irq_domain *domain,
456 					unsigned int virq, unsigned int nr_irqs)
457 {
458 	struct irq_data *data = irq_domain_get_irq_data(domain, virq);
459 
460 	irq_domain_reset_irq_data(data);
461 }
462 
463 /**
464  * ti_sci_inta_irq_domain_alloc() - Allocate Interrupt aggregator IRQs
465  * @domain:	Point to the interrupt aggregator IRQ domain
466  * @virq:	Corresponding Linux virtual IRQ number
467  * @nr_irqs:	Continuous irqs to be allocated
468  * @data:	Pointer to firmware specifier
469  *
470  * No actual allocation happens here.
471  *
472  * Return 0 if all went well else appropriate error value.
473  */
474 static int ti_sci_inta_irq_domain_alloc(struct irq_domain *domain,
475 					unsigned int virq, unsigned int nr_irqs,
476 					void *data)
477 {
478 	msi_alloc_info_t *arg = data;
479 
480 	irq_domain_set_info(domain, virq, arg->hwirq, &ti_sci_inta_irq_chip,
481 			    NULL, handle_edge_irq, NULL, NULL);
482 
483 	return 0;
484 }
485 
486 static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = {
487 	.free		= ti_sci_inta_irq_domain_free,
488 	.alloc		= ti_sci_inta_irq_domain_alloc,
489 };
490 
491 static struct irq_chip ti_sci_inta_msi_irq_chip = {
492 	.name			= "MSI-INTA",
493 	.flags			= IRQCHIP_SUPPORTS_LEVEL_MSI,
494 };
495 
496 static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,
497 				     struct msi_desc *desc)
498 {
499 	struct platform_device *pdev = to_platform_device(desc->dev);
500 
501 	arg->desc = desc;
502 	arg->hwirq = TO_HWIRQ(pdev->id, desc->inta.dev_index);
503 }
504 
505 static struct msi_domain_ops ti_sci_inta_msi_ops = {
506 	.set_desc	= ti_sci_inta_msi_set_desc,
507 };
508 
509 static struct msi_domain_info ti_sci_inta_msi_domain_info = {
510 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
511 		   MSI_FLAG_LEVEL_CAPABLE),
512 	.ops	= &ti_sci_inta_msi_ops,
513 	.chip	= &ti_sci_inta_msi_irq_chip,
514 };
515 
516 static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
517 {
518 	struct irq_domain *parent_domain, *domain, *msi_domain;
519 	struct device_node *parent_node, *node;
520 	struct ti_sci_inta_irq_domain *inta;
521 	struct device *dev = &pdev->dev;
522 	struct resource *res;
523 	int ret;
524 
525 	node = dev_of_node(dev);
526 	parent_node = of_irq_find_parent(node);
527 	if (!parent_node) {
528 		dev_err(dev, "Failed to get IRQ parent node\n");
529 		return -ENODEV;
530 	}
531 
532 	parent_domain = irq_find_host(parent_node);
533 	if (!parent_domain)
534 		return -EPROBE_DEFER;
535 
536 	inta = devm_kzalloc(dev, sizeof(*inta), GFP_KERNEL);
537 	if (!inta)
538 		return -ENOMEM;
539 
540 	inta->pdev = pdev;
541 	inta->sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
542 	if (IS_ERR(inta->sci)) {
543 		ret = PTR_ERR(inta->sci);
544 		if (ret != -EPROBE_DEFER)
545 			dev_err(dev, "ti,sci read fail %d\n", ret);
546 		inta->sci = NULL;
547 		return ret;
548 	}
549 
550 	ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &pdev->id);
551 	if (ret) {
552 		dev_err(dev, "missing 'ti,sci-dev-id' property\n");
553 		return -EINVAL;
554 	}
555 
556 	inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
557 						 "ti,sci-rm-range-vint");
558 	if (IS_ERR(inta->vint)) {
559 		dev_err(dev, "VINT resource allocation failed\n");
560 		return PTR_ERR(inta->vint);
561 	}
562 
563 	inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
564 						"ti,sci-rm-range-global-event");
565 	if (IS_ERR(inta->global_event)) {
566 		dev_err(dev, "Global event resource allocation failed\n");
567 		return PTR_ERR(inta->global_event);
568 	}
569 
570 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
571 	inta->base = devm_ioremap_resource(dev, res);
572 	if (IS_ERR(inta->base))
573 		return -ENODEV;
574 
575 	domain = irq_domain_add_linear(dev_of_node(dev),
576 				       ti_sci_get_num_resources(inta->vint),
577 				       &ti_sci_inta_irq_domain_ops, inta);
578 	if (!domain) {
579 		dev_err(dev, "Failed to allocate IRQ domain\n");
580 		return -ENOMEM;
581 	}
582 
583 	msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),
584 						&ti_sci_inta_msi_domain_info,
585 						domain);
586 	if (!msi_domain) {
587 		irq_domain_remove(domain);
588 		dev_err(dev, "Failed to allocate msi domain\n");
589 		return -ENOMEM;
590 	}
591 
592 	INIT_LIST_HEAD(&inta->vint_list);
593 	mutex_init(&inta->vint_mutex);
594 
595 	return 0;
596 }
597 
598 static const struct of_device_id ti_sci_inta_irq_domain_of_match[] = {
599 	{ .compatible = "ti,sci-inta", },
600 	{ /* sentinel */ },
601 };
602 MODULE_DEVICE_TABLE(of, ti_sci_inta_irq_domain_of_match);
603 
604 static struct platform_driver ti_sci_inta_irq_domain_driver = {
605 	.probe = ti_sci_inta_irq_domain_probe,
606 	.driver = {
607 		.name = "ti-sci-inta",
608 		.of_match_table = ti_sci_inta_irq_domain_of_match,
609 	},
610 };
611 module_platform_driver(ti_sci_inta_irq_domain_driver);
612 
613 MODULE_AUTHOR("Lokesh Vutla <lokeshvutla@ticom>");
614 MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI protocol");
615 MODULE_LICENSE("GPL v2");
616