root/drivers/irqchip/irq-ti-sci-inta.c

DEFINITIONS

1. ti_sci_inta_irq_handler
2. ti_sci_inta_alloc_parent_irq
3. ti_sci_inta_alloc_event
4. ti_sci_inta_alloc_irq
5. ti_sci_inta_free_parent_irq
6. ti_sci_inta_free_irq
7. ti_sci_inta_request_resources
8. ti_sci_inta_release_resources
9. ti_sci_inta_manage_event
10. ti_sci_inta_mask_irq
11. ti_sci_inta_unmask_irq
12. ti_sci_inta_ack_irq
13. ti_sci_inta_set_affinity
14. ti_sci_inta_set_type
15. ti_sci_inta_irq_domain_free
16. ti_sci_inta_irq_domain_alloc
17. ti_sci_inta_msi_set_desc
18. ti_sci_inta_irq_domain_probe

   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 #define VINT_STATUS_MASKED_OFFSET       0x20
  41 
  42 /**
  43  * struct ti_sci_inta_event_desc - Description of an event coming to
  44  *                                 Interrupt Aggregator. This serves
  45  *                                 as a mapping table for global event,
  46  *                                 hwirq and vint bit.
  47  * @global_event:       Global event number corresponding to this event
  48  * @hwirq:              Hwirq of the incoming interrupt
  49  * @vint_bit:           Corresponding vint bit to which this event is attached.
  50  */
  51 struct ti_sci_inta_event_desc {
  52         u16 global_event;
  53         u32 hwirq;
  54         u8 vint_bit;
  55 };
  56 
  57 /**
  58  * struct ti_sci_inta_vint_desc - Description of a virtual interrupt coming out
  59  *                                of Interrupt Aggregator.
  60  * @domain:             Pointer to IRQ domain to which this vint belongs.
  61  * @list:               List entry for the vint list
  62  * @event_map:          Bitmap to manage the allocation of events to vint.
  63  * @events:             Array of event descriptors assigned to this vint.
  64  * @parent_virq:        Linux IRQ number that gets attached to parent
  65  * @vint_id:            TISCI vint ID
  66  */
  67 struct ti_sci_inta_vint_desc {
  68         struct irq_domain *domain;
  69         struct list_head list;
  70         DECLARE_BITMAP(event_map, MAX_EVENTS_PER_VINT);
  71         struct ti_sci_inta_event_desc events[MAX_EVENTS_PER_VINT];
  72         unsigned int parent_virq;
  73         u16 vint_id;
  74 };
  75 
  76 /**
  77  * struct ti_sci_inta_irq_domain - Structure representing a TISCI based
  78  *                                 Interrupt Aggregator IRQ domain.
  79  * @sci:                Pointer to TISCI handle
  80  * @vint:               TISCI resource pointer representing IA inerrupts.
  81  * @global_event:       TISCI resource pointer representing global events.
  82  * @vint_list:          List of the vints active in the system
  83  * @vint_mutex:         Mutex to protect vint_list
  84  * @base:               Base address of the memory mapped IO registers
  85  * @pdev:               Pointer to platform device.
  86  */
  87 struct ti_sci_inta_irq_domain {
  88         const struct ti_sci_handle *sci;
  89         struct ti_sci_resource *vint;
  90         struct ti_sci_resource *global_event;
  91         struct list_head vint_list;
  92         /* Mutex to protect vint list */
  93         struct mutex vint_mutex;
  94         void __iomem *base;
  95         struct platform_device *pdev;
  96 };
  97 
  98 #define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
  99                                         events[i])
 100 
 101 /**
 102  * ti_sci_inta_irq_handler() - Chained IRQ handler for the vint irqs
 103  * @desc:       Pointer to irq_desc corresponding to the irq
 104  */
 105 static void ti_sci_inta_irq_handler(struct irq_desc *desc)
 106 {
 107         struct ti_sci_inta_vint_desc *vint_desc;
 108         struct ti_sci_inta_irq_domain *inta;
 109         struct irq_domain *domain;
 110         unsigned int virq, bit;
 111         unsigned long val;
 112 
 113         vint_desc = irq_desc_get_handler_data(desc);
 114         domain = vint_desc->domain;
 115         inta = domain->host_data;
 116 
 117         chained_irq_enter(irq_desc_get_chip(desc), desc);
 118 
 119         val = readq_relaxed(inta->base + vint_desc->vint_id * 0x1000 +
 120                             VINT_STATUS_MASKED_OFFSET);
 121 
 122         for_each_set_bit(bit, &val, MAX_EVENTS_PER_VINT) {
 123                 virq = irq_find_mapping(domain, vint_desc->events[bit].hwirq);
 124                 if (virq)
 125                         generic_handle_irq(virq);
 126         }
 127 
 128         chained_irq_exit(irq_desc_get_chip(desc), desc);
 129 }
 130 
 131 /**
 132  * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
 133  * @domain:     IRQ domain corresponding to Interrupt Aggregator
 134  *
 135  * Return 0 if all went well else corresponding error value.
 136  */
 137 static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_domain *domain)
 138 {
 139         struct ti_sci_inta_irq_domain *inta = domain->host_data;
 140         struct ti_sci_inta_vint_desc *vint_desc;
 141         struct irq_fwspec parent_fwspec;
 142         unsigned int parent_virq;
 143         u16 vint_id;
 144 
 145         vint_id = ti_sci_get_free_resource(inta->vint);
 146         if (vint_id == TI_SCI_RESOURCE_NULL)
 147                 return ERR_PTR(-EINVAL);
 148 
 149         vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
 150         if (!vint_desc)
 151                 return ERR_PTR(-ENOMEM);
 152 
 153         vint_desc->domain = domain;
 154         vint_desc->vint_id = vint_id;
 155         INIT_LIST_HEAD(&vint_desc->list);
 156 
 157         parent_fwspec.fwnode = of_node_to_fwnode(of_irq_find_parent(dev_of_node(&inta->pdev->dev)));
 158         parent_fwspec.param_count = 2;
 159         parent_fwspec.param[0] = inta->pdev->id;
 160         parent_fwspec.param[1] = vint_desc->vint_id;
 161 
 162         parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
 163         if (parent_virq == 0) {
 164                 kfree(vint_desc);
 165                 return ERR_PTR(-EINVAL);
 166         }
 167         vint_desc->parent_virq = parent_virq;
 168 
 169         list_add_tail(&vint_desc->list, &inta->vint_list);
 170         irq_set_chained_handler_and_data(vint_desc->parent_virq,
 171                                          ti_sci_inta_irq_handler, vint_desc);
 172 
 173         return vint_desc;
 174 }
 175 
 176 /**
 177  * ti_sci_inta_alloc_event() - Attach an event to a IA vint.
 178  * @vint_desc:  Pointer to vint_desc to which the event gets attached
 179  * @free_bit:   Bit inside vint to which event gets attached
 180  * @hwirq:      hwirq of the input event
 181  *
 182  * Return event_desc pointer if all went ok else appropriate error value.
 183  */
 184 static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_event(struct ti_sci_inta_vint_desc *vint_desc,
 185                                                               u16 free_bit,
 186                                                               u32 hwirq)
 187 {
 188         struct ti_sci_inta_irq_domain *inta = vint_desc->domain->host_data;
 189         struct ti_sci_inta_event_desc *event_desc;
 190         u16 dev_id, dev_index;
 191         int err;
 192 
 193         dev_id = HWIRQ_TO_DEVID(hwirq);
 194         dev_index = HWIRQ_TO_IRQID(hwirq);
 195 
 196         event_desc = &vint_desc->events[free_bit];
 197         event_desc->hwirq = hwirq;
 198         event_desc->vint_bit = free_bit;
 199         event_desc->global_event = ti_sci_get_free_resource(inta->global_event);
 200         if (event_desc->global_event == TI_SCI_RESOURCE_NULL)
 201                 return ERR_PTR(-EINVAL);
 202 
 203         err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,
 204                                                       dev_id, dev_index,
 205                                                       inta->pdev->id,
 206                                                       vint_desc->vint_id,
 207                                                       event_desc->global_event,
 208                                                       free_bit);
 209         if (err)
 210                 goto free_global_event;
 211 
 212         return event_desc;
 213 free_global_event:
 214         ti_sci_release_resource(inta->global_event, event_desc->global_event);
 215         return ERR_PTR(err);
 216 }
 217 
 218 /**
 219  * ti_sci_inta_alloc_irq() -  Allocate an irq within INTA domain
 220  * @domain:     irq_domain pointer corresponding to INTA
 221  * @hwirq:      hwirq of the input event
 222  *
 223  * Note: Allocation happens in the following manner:
 224  *      - Find a free bit available in any of the vints available in the list.
 225  *      - If not found, allocate a vint from the vint pool
 226  *      - Attach the free bit to input hwirq.
 227  * Return event_desc if all went ok else appropriate error value.
 228  */
 229 static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_irq(struct irq_domain *domain,
 230                                                             u32 hwirq)
 231 {
 232         struct ti_sci_inta_irq_domain *inta = domain->host_data;
 233         struct ti_sci_inta_vint_desc *vint_desc = NULL;
 234         struct ti_sci_inta_event_desc *event_desc;
 235         u16 free_bit;
 236 
 237         mutex_lock(&inta->vint_mutex);
 238         list_for_each_entry(vint_desc, &inta->vint_list, list) {
 239                 free_bit = find_first_zero_bit(vint_desc->event_map,
 240                                                MAX_EVENTS_PER_VINT);
 241                 if (free_bit != MAX_EVENTS_PER_VINT) {
 242                         set_bit(free_bit, vint_desc->event_map);
 243                         goto alloc_event;
 244                 }
 245         }
 246 
 247         /* No free bits available. Allocate a new vint */
 248         vint_desc = ti_sci_inta_alloc_parent_irq(domain);
 249         if (IS_ERR(vint_desc)) {
 250                 mutex_unlock(&inta->vint_mutex);
 251                 return ERR_PTR(PTR_ERR(vint_desc));
 252         }
 253 
 254         free_bit = find_first_zero_bit(vint_desc->event_map,
 255                                        MAX_EVENTS_PER_VINT);
 256         set_bit(free_bit, vint_desc->event_map);
 257 
 258 alloc_event:
 259         event_desc = ti_sci_inta_alloc_event(vint_desc, free_bit, hwirq);
 260         if (IS_ERR(event_desc))
 261                 clear_bit(free_bit, vint_desc->event_map);
 262 
 263         mutex_unlock(&inta->vint_mutex);
 264         return event_desc;
 265 }
 266 
 267 /**
 268  * ti_sci_inta_free_parent_irq() - Free a parent irq to INTA
 269  * @inta:       Pointer to inta domain.
 270  * @vint_desc:  Pointer to vint_desc that needs to be freed.
 271  */
 272 static void ti_sci_inta_free_parent_irq(struct ti_sci_inta_irq_domain *inta,
 273                                         struct ti_sci_inta_vint_desc *vint_desc)
 274 {
 275         if (find_first_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT) == MAX_EVENTS_PER_VINT) {
 276                 list_del(&vint_desc->list);
 277                 ti_sci_release_resource(inta->vint, vint_desc->vint_id);
 278                 irq_dispose_mapping(vint_desc->parent_virq);
 279                 kfree(vint_desc);
 280         }
 281 }
 282 
 283 /**
 284  * ti_sci_inta_free_irq() - Free an IRQ within INTA domain
 285  * @event_desc: Pointer to event_desc that needs to be freed.
 286  * @hwirq:      Hwirq number within INTA domain that needs to be freed
 287  */
 288 static void ti_sci_inta_free_irq(struct ti_sci_inta_event_desc *event_desc,
 289                                  u32 hwirq)
 290 {
 291         struct ti_sci_inta_vint_desc *vint_desc;
 292         struct ti_sci_inta_irq_domain *inta;
 293 
 294         vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
 295         inta = vint_desc->domain->host_data;
 296         /* free event irq */
 297         mutex_lock(&inta->vint_mutex);
 298         inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
 299                                                  HWIRQ_TO_DEVID(hwirq),
 300                                                  HWIRQ_TO_IRQID(hwirq),
 301                                                  inta->pdev->id,
 302                                                  vint_desc->vint_id,
 303                                                  event_desc->global_event,
 304                                                  event_desc->vint_bit);
 305 
 306         clear_bit(event_desc->vint_bit, vint_desc->event_map);
 307         ti_sci_release_resource(inta->global_event, event_desc->global_event);
 308         event_desc->global_event = TI_SCI_RESOURCE_NULL;
 309         event_desc->hwirq = 0;
 310 
 311         ti_sci_inta_free_parent_irq(inta, vint_desc);
 312         mutex_unlock(&inta->vint_mutex);
 313 }
 314 
 315 /**
 316  * ti_sci_inta_request_resources() - Allocate resources for input irq
 317  * @data: Pointer to corresponding irq_data
 318  *
 319  * Note: This is the core api where the actual allocation happens for input
 320  *       hwirq. This allocation involves creating a parent irq for vint.
 321  *       If this is done in irq_domain_ops.alloc() then a deadlock is reached
 322  *       for allocation. So this allocation is being done in request_resources()
 323  *
 324  * Return: 0 if all went well else corresponding error.
 325  */
 326 static int ti_sci_inta_request_resources(struct irq_data *data)
 327 {
 328         struct ti_sci_inta_event_desc *event_desc;
 329 
 330         event_desc = ti_sci_inta_alloc_irq(data->domain, data->hwirq);
 331         if (IS_ERR(event_desc))
 332                 return PTR_ERR(event_desc);
 333 
 334         data->chip_data = event_desc;
 335 
 336         return 0;
 337 }
 338 
 339 /**
 340  * ti_sci_inta_release_resources - Release resources for input irq
 341  * @data: Pointer to corresponding irq_data
 342  *
 343  * Note: Corresponding to request_resources(), all the unmapping and deletion
 344  *       of parent vint irqs happens in this api.
 345  */
 346 static void ti_sci_inta_release_resources(struct irq_data *data)
 347 {
 348         struct ti_sci_inta_event_desc *event_desc;
 349 
 350         event_desc = irq_data_get_irq_chip_data(data);
 351         ti_sci_inta_free_irq(event_desc, data->hwirq);
 352 }
 353 
 354 /**
 355  * ti_sci_inta_manage_event() - Control the event based on the offset
 356  * @data:       Pointer to corresponding irq_data
 357  * @offset:     register offset using which event is controlled.
 358  */
 359 static void ti_sci_inta_manage_event(struct irq_data *data, u32 offset)
 360 {
 361         struct ti_sci_inta_event_desc *event_desc;
 362         struct ti_sci_inta_vint_desc *vint_desc;
 363         struct ti_sci_inta_irq_domain *inta;
 364 
 365         event_desc = irq_data_get_irq_chip_data(data);
 366         vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
 367         inta = data->domain->host_data;
 368 
 369         writeq_relaxed(BIT(event_desc->vint_bit),
 370                        inta->base + vint_desc->vint_id * 0x1000 + offset);
 371 }
 372 
 373 /**
 374  * ti_sci_inta_mask_irq() - Mask an event
 375  * @data:       Pointer to corresponding irq_data
 376  */
 377 static void ti_sci_inta_mask_irq(struct irq_data *data)
 378 {
 379         ti_sci_inta_manage_event(data, VINT_ENABLE_CLR_OFFSET);
 380 }
 381 
 382 /**
 383  * ti_sci_inta_unmask_irq() - Unmask an event
 384  * @data:       Pointer to corresponding irq_data
 385  */
 386 static void ti_sci_inta_unmask_irq(struct irq_data *data)
 387 {
 388         ti_sci_inta_manage_event(data, VINT_ENABLE_SET_OFFSET);
 389 }
 390 
 391 /**
 392  * ti_sci_inta_ack_irq() - Ack an event
 393  * @data:       Pointer to corresponding irq_data
 394  */
 395 static void ti_sci_inta_ack_irq(struct irq_data *data)
 396 {
 397         /*
 398          * Do not clear the event if hardware is capable of sending
 399          * a down event.
 400          */
 401         if (irqd_get_trigger_type(data) != IRQF_TRIGGER_HIGH)
 402                 ti_sci_inta_manage_event(data, VINT_STATUS_OFFSET);
 403 }
 404 
 405 static int ti_sci_inta_set_affinity(struct irq_data *d,
 406                                     const struct cpumask *mask_val, bool force)
 407 {
 408         return -EINVAL;
 409 }
 410 
 411 /**
 412  * ti_sci_inta_set_type() - Update the trigger type of the irq.
 413  * @data:       Pointer to corresponding irq_data
 414  * @type:       Trigger type as specified by user
 415  *
 416  * Note: This updates the handle_irq callback for level msi.
 417  *
 418  * Return 0 if all went well else appropriate error.
 419  */
 420 static int ti_sci_inta_set_type(struct irq_data *data, unsigned int type)
 421 {
 422         /*
 423          * .alloc default sets handle_edge_irq. But if the user specifies
 424          * that IRQ is level MSI, then update the handle to handle_level_irq
 425          */
 426         switch (type & IRQ_TYPE_SENSE_MASK) {
 427         case IRQF_TRIGGER_HIGH:
 428                 irq_set_handler_locked(data, handle_level_irq);
 429                 return 0;
 430         case IRQF_TRIGGER_RISING:
 431                 return 0;
 432         default:
 433                 return -EINVAL;
 434         }
 435 
 436         return -EINVAL;
 437 }
 438 
 439 static struct irq_chip ti_sci_inta_irq_chip = {
 440         .name                   = "INTA",
 441         .irq_ack                = ti_sci_inta_ack_irq,
 442         .irq_mask               = ti_sci_inta_mask_irq,
 443         .irq_set_type           = ti_sci_inta_set_type,
 444         .irq_unmask             = ti_sci_inta_unmask_irq,
 445         .irq_set_affinity       = ti_sci_inta_set_affinity,
 446         .irq_request_resources  = ti_sci_inta_request_resources,
 447         .irq_release_resources  = ti_sci_inta_release_resources,
 448 };
 449 
 450 /**
 451  * ti_sci_inta_irq_domain_free() - Free an IRQ from the IRQ domain
 452  * @domain:     Domain to which the irqs belong
 453  * @virq:       base linux virtual IRQ to be freed.
 454  * @nr_irqs:    Number of continuous irqs to be freed
 455  */
 456 static void ti_sci_inta_irq_domain_free(struct irq_domain *domain,
 457                                         unsigned int virq, unsigned int nr_irqs)
 458 {
 459         struct irq_data *data = irq_domain_get_irq_data(domain, virq);
 460 
 461         irq_domain_reset_irq_data(data);
 462 }
 463 
 464 /**
 465  * ti_sci_inta_irq_domain_alloc() - Allocate Interrupt aggregator IRQs
 466  * @domain:     Point to the interrupt aggregator IRQ domain
 467  * @virq:       Corresponding Linux virtual IRQ number
 468  * @nr_irqs:    Continuous irqs to be allocated
 469  * @data:       Pointer to firmware specifier
 470  *
 471  * No actual allocation happens here.
 472  *
 473  * Return 0 if all went well else appropriate error value.
 474  */
 475 static int ti_sci_inta_irq_domain_alloc(struct irq_domain *domain,
 476                                         unsigned int virq, unsigned int nr_irqs,
 477                                         void *data)
 478 {
 479         msi_alloc_info_t *arg = data;
 480 
 481         irq_domain_set_info(domain, virq, arg->hwirq, &ti_sci_inta_irq_chip,
 482                             NULL, handle_edge_irq, NULL, NULL);
 483 
 484         return 0;
 485 }
 486 
 487 static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = {
 488         .free           = ti_sci_inta_irq_domain_free,
 489         .alloc          = ti_sci_inta_irq_domain_alloc,
 490 };
 491 
 492 static struct irq_chip ti_sci_inta_msi_irq_chip = {
 493         .name                   = "MSI-INTA",
 494         .flags                  = IRQCHIP_SUPPORTS_LEVEL_MSI,
 495 };
 496 
 497 static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,
 498                                      struct msi_desc *desc)
 499 {
 500         struct platform_device *pdev = to_platform_device(desc->dev);
 501 
 502         arg->desc = desc;
 503         arg->hwirq = TO_HWIRQ(pdev->id, desc->inta.dev_index);
 504 }
 505 
 506 static struct msi_domain_ops ti_sci_inta_msi_ops = {
 507         .set_desc       = ti_sci_inta_msi_set_desc,
 508 };
 509 
 510 static struct msi_domain_info ti_sci_inta_msi_domain_info = {
 511         .flags  = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
 512                    MSI_FLAG_LEVEL_CAPABLE),
 513         .ops    = &ti_sci_inta_msi_ops,
 514         .chip   = &ti_sci_inta_msi_irq_chip,
 515 };
 516 
 517 static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
 518 {
 519         struct irq_domain *parent_domain, *domain, *msi_domain;
 520         struct device_node *parent_node, *node;
 521         struct ti_sci_inta_irq_domain *inta;
 522         struct device *dev = &pdev->dev;
 523         struct resource *res;
 524         int ret;
 525 
 526         node = dev_of_node(dev);
 527         parent_node = of_irq_find_parent(node);
 528         if (!parent_node) {
 529                 dev_err(dev, "Failed to get IRQ parent node\n");
 530                 return -ENODEV;
 531         }
 532 
 533         parent_domain = irq_find_host(parent_node);
 534         if (!parent_domain)
 535                 return -EPROBE_DEFER;
 536 
 537         inta = devm_kzalloc(dev, sizeof(*inta), GFP_KERNEL);
 538         if (!inta)
 539                 return -ENOMEM;
 540 
 541         inta->pdev = pdev;
 542         inta->sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
 543         if (IS_ERR(inta->sci)) {
 544                 ret = PTR_ERR(inta->sci);
 545                 if (ret != -EPROBE_DEFER)
 546                         dev_err(dev, "ti,sci read fail %d\n", ret);
 547                 inta->sci = NULL;
 548                 return ret;
 549         }
 550 
 551         ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &pdev->id);
 552         if (ret) {
 553                 dev_err(dev, "missing 'ti,sci-dev-id' property\n");
 554                 return -EINVAL;
 555         }
 556 
 557         inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
 558                                                  "ti,sci-rm-range-vint");
 559         if (IS_ERR(inta->vint)) {
 560                 dev_err(dev, "VINT resource allocation failed\n");
 561                 return PTR_ERR(inta->vint);
 562         }
 563 
 564         inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
 565                                                 "ti,sci-rm-range-global-event");
 566         if (IS_ERR(inta->global_event)) {
 567                 dev_err(dev, "Global event resource allocation failed\n");
 568                 return PTR_ERR(inta->global_event);
 569         }
 570 
 571         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 572         inta->base = devm_ioremap_resource(dev, res);
 573         if (IS_ERR(inta->base))
 574                 return -ENODEV;
 575 
 576         domain = irq_domain_add_linear(dev_of_node(dev),
 577                                        ti_sci_get_num_resources(inta->vint),
 578                                        &ti_sci_inta_irq_domain_ops, inta);
 579         if (!domain) {
 580                 dev_err(dev, "Failed to allocate IRQ domain\n");
 581                 return -ENOMEM;
 582         }
 583 
 584         msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),
 585                                                 &ti_sci_inta_msi_domain_info,
 586                                                 domain);
 587         if (!msi_domain) {
 588                 irq_domain_remove(domain);
 589                 dev_err(dev, "Failed to allocate msi domain\n");
 590                 return -ENOMEM;
 591         }
 592 
 593         INIT_LIST_HEAD(&inta->vint_list);
 594         mutex_init(&inta->vint_mutex);
 595 
 596         return 0;
 597 }
 598 
 599 static const struct of_device_id ti_sci_inta_irq_domain_of_match[] = {
 600         { .compatible = "ti,sci-inta", },
 601         { /* sentinel */ },
 602 };
 603 MODULE_DEVICE_TABLE(of, ti_sci_inta_irq_domain_of_match);
 604 
 605 static struct platform_driver ti_sci_inta_irq_domain_driver = {
 606         .probe = ti_sci_inta_irq_domain_probe,
 607         .driver = {
 608                 .name = "ti-sci-inta",
 609                 .of_match_table = ti_sci_inta_irq_domain_of_match,
 610         },
 611 };
 612 module_platform_driver(ti_sci_inta_irq_domain_driver);
 613 
 614 MODULE_AUTHOR("Lokesh Vutla <lokeshvutla@ticom>");
 615 MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI protocol");
 616 MODULE_LICENSE("GPL v2");