drivers/irqchip/irq-renesas-intc-irqpin.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas INTC External IRQ Pin Driver
   4  *
   5  *  Copyright (C) 2013 Magnus Damm
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/of.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/ioport.h>
  14 #include <linux/io.h>
  15 #include <linux/irq.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/module.h>
  20 #include <linux/of_device.h>
  21 #include <linux/pm_runtime.h>
  22
  23 #define INTC_IRQPIN_MAX 8 /* maximum 8 interrupts per driver instance */
  24
  25 #define INTC_IRQPIN_REG_SENSE 0 /* ICRn */
  26 #define INTC_IRQPIN_REG_PRIO 1 /* INTPRInn */
  27 #define INTC_IRQPIN_REG_SOURCE 2 /* INTREQnn */
  28 #define INTC_IRQPIN_REG_MASK 3 /* INTMSKnn */
  29 #define INTC_IRQPIN_REG_CLEAR 4 /* INTMSKCLRnn */
  30 #define INTC_IRQPIN_REG_NR_MANDATORY 5
  31 #define INTC_IRQPIN_REG_IRLM 5 /* ICR0 with IRLM bit (optional) */
  32 #define INTC_IRQPIN_REG_NR 6
  33
  34 /* INTC external IRQ PIN hardware register access:
  35  *
  36  * SENSE is read-write 32-bit with 2-bits or 4-bits per IRQ (*)
  37  * PRIO is read-write 32-bit with 4-bits per IRQ (**)
  38  * SOURCE is read-only 32-bit or 8-bit with 1-bit per IRQ (***)
  39  * MASK is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
  40  * CLEAR is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
  41  *
  42  * (*) May be accessed by more than one driver instance - lock needed
  43  * (**) Read-modify-write access by one driver instance - lock needed
  44  * (***) Accessed by one driver instance only - no locking needed
  45  */
  46
  47 struct intc_irqpin_iomem {
  48         void __iomem *iomem;
  49         unsigned long (*read)(void __iomem *iomem);
  50         void (*write)(void __iomem *iomem, unsigned long data);
  51         int width;
  52 };
  53
  54 struct intc_irqpin_irq {
  55         int hw_irq;
  56         int requested_irq;
  57         int domain_irq;
  58         struct intc_irqpin_priv *p;
  59 };
  60
  61 struct intc_irqpin_priv {
  62         struct intc_irqpin_iomem iomem[INTC_IRQPIN_REG_NR];
  63         struct intc_irqpin_irq irq[INTC_IRQPIN_MAX];
  64         unsigned int sense_bitfield_width;
  65         struct platform_device *pdev;
  66         struct irq_chip irq_chip;
  67         struct irq_domain *irq_domain;
  68         atomic_t wakeup_path;
  69         unsigned shared_irqs:1;
  70         u8 shared_irq_mask;
  71 };
  72
  73 struct intc_irqpin_config {
  74         unsigned int irlm_bit;
  75         unsigned needs_irlm:1;
  76 };
  77
  78 static unsigned long intc_irqpin_read32(void __iomem *iomem)
  79 {
  80         return ioread32(iomem);
  81 }
  82
  83 static unsigned long intc_irqpin_read8(void __iomem *iomem)
  84 {
  85         return ioread8(iomem);
  86 }
  87
  88 static void intc_irqpin_write32(void __iomem *iomem, unsigned long data)
  89 {
  90         iowrite32(data, iomem);
  91 }
  92
  93 static void intc_irqpin_write8(void __iomem *iomem, unsigned long data)
  94 {
  95         iowrite8(data, iomem);
  96 }
  97
  98 static inline unsigned long intc_irqpin_read(struct intc_irqpin_priv *p,
  99                                              int reg)
 100 {
 101         struct intc_irqpin_iomem *i = &p->iomem[reg];
 102
 103         return i->read(i->iomem);
 104 }
 105
 106 static inline void intc_irqpin_write(struct intc_irqpin_priv *p,
 107                                      int reg, unsigned long data)
 108 {
 109         struct intc_irqpin_iomem *i = &p->iomem[reg];
 110
 111         i->write(i->iomem, data);
 112 }
 113
 114 static inline unsigned long intc_irqpin_hwirq_mask(struct intc_irqpin_priv *p,
 115                                                    int reg, int hw_irq)
 116 {
 117         return BIT((p->iomem[reg].width - 1) - hw_irq);
 118 }
 119
 120 static inline void intc_irqpin_irq_write_hwirq(struct intc_irqpin_priv *p,
 121                                                int reg, int hw_irq)
 122 {
 123         intc_irqpin_write(p, reg, intc_irqpin_hwirq_mask(p, reg, hw_irq));
 124 }
 125
 126 static DEFINE_RAW_SPINLOCK(intc_irqpin_lock); /* only used by slow path */
 127
 128 static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p,
 129                                           int reg, int shift,
 130                                           int width, int value)
 131 {
 132         unsigned long flags;
 133         unsigned long tmp;
 134
 135         raw_spin_lock_irqsave(&intc_irqpin_lock, flags);
 136
 137         tmp = intc_irqpin_read(p, reg);
 138         tmp &= ~(((1 << width) - 1) << shift);
 139         tmp |= value << shift;
 140         intc_irqpin_write(p, reg, tmp);
 141
 142         raw_spin_unlock_irqrestore(&intc_irqpin_lock, flags);
 143 }
 144
 145 static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p,
 146                                          int irq, int do_mask)
 147 {
 148         /* The PRIO register is assumed to be 32-bit with fixed 4-bit fields. */
 149         int bitfield_width = 4;
 150         int shift = 32 - (irq + 1) * bitfield_width;
 151
 152         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_PRIO,
 153                                       shift, bitfield_width,
 154                                       do_mask ? 0 : (1 << bitfield_width) - 1);
 155 }
 156
 157 static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value)
 158 {
 159         /* The SENSE register is assumed to be 32-bit. */
 160         int bitfield_width = p->sense_bitfield_width;
 161         int shift = 32 - (irq + 1) * bitfield_width;
 162
 163         dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value);
 164
 165         if (value >= (1 << bitfield_width))
 166                 return -EINVAL;
 167
 168         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_SENSE, shift,
 169                                       bitfield_width, value);
 170         return 0;
 171 }
 172
 173 static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str)
 174 {
 175         dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n",
 176                 str, i->requested_irq, i->hw_irq, i->domain_irq);
 177 }
 178
 179 static void intc_irqpin_irq_enable(struct irq_data *d)
 180 {
 181         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 182         int hw_irq = irqd_to_hwirq(d);
 183
 184         intc_irqpin_dbg(&p->irq[hw_irq], "enable");
 185         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
 186 }
 187
 188 static void intc_irqpin_irq_disable(struct irq_data *d)
 189 {
 190         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 191         int hw_irq = irqd_to_hwirq(d);
 192
 193         intc_irqpin_dbg(&p->irq[hw_irq], "disable");
 194         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
 195 }
 196
 197 static void intc_irqpin_shared_irq_enable(struct irq_data *d)
 198 {
 199         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 200         int hw_irq = irqd_to_hwirq(d);
 201
 202         intc_irqpin_dbg(&p->irq[hw_irq], "shared enable");
 203         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
 204
 205         p->shared_irq_mask &= ~BIT(hw_irq);
 206 }
 207
 208 static void intc_irqpin_shared_irq_disable(struct irq_data *d)
 209 {
 210         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 211         int hw_irq = irqd_to_hwirq(d);
 212
 213         intc_irqpin_dbg(&p->irq[hw_irq], "shared disable");
 214         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
 215
 216         p->shared_irq_mask |= BIT(hw_irq);
 217 }
 218
 219 static void intc_irqpin_irq_enable_force(struct irq_data *d)
 220 {
 221         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 222         int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 223
 224         intc_irqpin_irq_enable(d);
 225
 226         /* enable interrupt through parent interrupt controller,
 227          * assumes non-shared interrupt with 1:1 mapping
 228          * needed for busted IRQs on some SoCs like sh73a0
 229          */
 230         irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq));
 231 }
 232
 233 static void intc_irqpin_irq_disable_force(struct irq_data *d)
 234 {
 235         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 236         int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 237
 238         /* disable interrupt through parent interrupt controller,
 239          * assumes non-shared interrupt with 1:1 mapping
 240          * needed for busted IRQs on some SoCs like sh73a0
 241          */
 242         irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq));
 243         intc_irqpin_irq_disable(d);
 244 }
 245
 246 #define INTC_IRQ_SENSE_VALID 0x10
 247 #define INTC_IRQ_SENSE(x) (x + INTC_IRQ_SENSE_VALID)
 248
 249 static unsigned char intc_irqpin_sense[IRQ_TYPE_SENSE_MASK + 1] = {
 250         [IRQ_TYPE_EDGE_FALLING] = INTC_IRQ_SENSE(0x00),
 251         [IRQ_TYPE_EDGE_RISING] = INTC_IRQ_SENSE(0x01),
 252         [IRQ_TYPE_LEVEL_LOW] = INTC_IRQ_SENSE(0x02),
 253         [IRQ_TYPE_LEVEL_HIGH] = INTC_IRQ_SENSE(0x03),
 254         [IRQ_TYPE_EDGE_BOTH] = INTC_IRQ_SENSE(0x04),
 255 };
 256
 257 static int intc_irqpin_irq_set_type(struct irq_data *d, unsigned int type)
 258 {
 259         unsigned char value = intc_irqpin_sense[type & IRQ_TYPE_SENSE_MASK];
 260         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 261
 262         if (!(value & INTC_IRQ_SENSE_VALID))
 263                 return -EINVAL;
 264
 265         return intc_irqpin_set_sense(p, irqd_to_hwirq(d),
 266                                      value ^ INTC_IRQ_SENSE_VALID);
 267 }
 268
 269 static int intc_irqpin_irq_set_wake(struct irq_data *d, unsigned int on)
 270 {
 271         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 272         int hw_irq = irqd_to_hwirq(d);
 273
 274         irq_set_irq_wake(p->irq[hw_irq].requested_irq, on);
 275         if (on)
 276                 atomic_inc(&p->wakeup_path);
 277         else
 278                 atomic_dec(&p->wakeup_path);
 279
 280         return 0;
 281 }
 282
 283 static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id)
 284 {
 285         struct intc_irqpin_irq *i = dev_id;
 286         struct intc_irqpin_priv *p = i->p;
 287         unsigned long bit;
 288
 289         intc_irqpin_dbg(i, "demux1");
 290         bit = intc_irqpin_hwirq_mask(p, INTC_IRQPIN_REG_SOURCE, i->hw_irq);
 291
 292         if (intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE) & bit) {
 293                 intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, ~bit);
 294                 intc_irqpin_dbg(i, "demux2");
 295                 generic_handle_irq(i->domain_irq);
 296                 return IRQ_HANDLED;
 297         }
 298         return IRQ_NONE;
 299 }
 300
 301 static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id)
 302 {
 303         struct intc_irqpin_priv *p = dev_id;
 304         unsigned int reg_source = intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE);
 305         irqreturn_t status = IRQ_NONE;
 306         int k;
 307
 308         for (k = 0; k < 8; k++) {
 309                 if (reg_source & BIT(7 - k)) {
 310                         if (BIT(k) & p->shared_irq_mask)
 311                                 continue;
 312
 313                         status |= intc_irqpin_irq_handler(irq, &p->irq[k]);
 314                 }
 315         }
 316
 317         return status;
 318 }
 319
 320 /*
 321  * This lock class tells lockdep that INTC External IRQ Pin irqs are in a
 322  * different category than their parents, so it won't report false recursion.
 323  */
 324 static struct lock_class_key intc_irqpin_irq_lock_class;
 325
 326 /* And this is for the request mutex */
 327 static struct lock_class_key intc_irqpin_irq_request_class;
 328
 329 static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
 330                                       irq_hw_number_t hw)
 331 {
 332         struct intc_irqpin_priv *p = h->host_data;
 333
 334         p->irq[hw].domain_irq = virq;
 335         p->irq[hw].hw_irq = hw;
 336
 337         intc_irqpin_dbg(&p->irq[hw], "map");
 338         irq_set_chip_data(virq, h->host_data);
 339         irq_set_lockdep_class(virq, &intc_irqpin_irq_lock_class,
 340                               &intc_irqpin_irq_request_class);
 341         irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq);
 342         return 0;
 343 }
 344
 345 static const struct irq_domain_ops intc_irqpin_irq_domain_ops = {
 346         .map    = intc_irqpin_irq_domain_map,
 347         .xlate  = irq_domain_xlate_twocell,
 348 };
 349
 350 static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = {
 351         .irlm_bit = 23, /* ICR0.IRLM0 */
 352         .needs_irlm = 1,
 353 };
 354
 355 static const struct intc_irqpin_config intc_irqpin_rmobile = {
 356         .needs_irlm = 0,
 357 };
 358
 359 static const struct of_device_id intc_irqpin_dt_ids[] = {
 360         { .compatible = "renesas,intc-irqpin", },
 361         { .compatible = "renesas,intc-irqpin-r8a7778",
 362           .data = &intc_irqpin_irlm_r8a777x },
 363         { .compatible = "renesas,intc-irqpin-r8a7779",
 364           .data = &intc_irqpin_irlm_r8a777x },
 365         { .compatible = "renesas,intc-irqpin-r8a7740",
 366           .data = &intc_irqpin_rmobile },
 367         { .compatible = "renesas,intc-irqpin-sh73a0",
 368           .data = &intc_irqpin_rmobile },
 369         {},
 370 };
 371 MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids);
 372
 373 static int intc_irqpin_probe(struct platform_device *pdev)
 374 {
 375         const struct intc_irqpin_config *config;
 376         struct device *dev = &pdev->dev;
 377         struct intc_irqpin_priv *p;
 378         struct intc_irqpin_iomem *i;
 379         struct resource *io[INTC_IRQPIN_REG_NR];
 380         struct resource *irq;
 381         struct irq_chip *irq_chip;
 382         void (*enable_fn)(struct irq_data *d);
 383         void (*disable_fn)(struct irq_data *d);
 384         const char *name = dev_name(dev);
 385         bool control_parent;
 386         unsigned int nirqs;
 387         int ref_irq;
 388         int ret;
 389         int k;
 390
 391         p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
 392         if (!p)
 393                 return -ENOMEM;
 394
 395         /* deal with driver instance configuration */
 396         of_property_read_u32(dev->of_node, "sense-bitfield-width",
 397                              &p->sense_bitfield_width);
 398         control_parent = of_property_read_bool(dev->of_node, "control-parent");
 399         if (!p->sense_bitfield_width)
 400                 p->sense_bitfield_width = 4; /* default to 4 bits */
 401
 402         p->pdev = pdev;
 403         platform_set_drvdata(pdev, p);
 404
 405         config = of_device_get_match_data(dev);
 406
 407         pm_runtime_enable(dev);
 408         pm_runtime_get_sync(dev);
 409
 410         /* get hold of register banks */
 411         memset(io, 0, sizeof(io));
 412         for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
 413                 io[k] = platform_get_resource(pdev, IORESOURCE_MEM, k);
 414                 if (!io[k] && k < INTC_IRQPIN_REG_NR_MANDATORY) {
 415                         dev_err(dev, "not enough IOMEM resources\n");
 416                         ret = -EINVAL;
 417                         goto err0;
 418                 }
 419         }
 420
 421         /* allow any number of IRQs between 1 and INTC_IRQPIN_MAX */
 422         for (k = 0; k < INTC_IRQPIN_MAX; k++) {
 423                 irq = platform_get_resource(pdev, IORESOURCE_IRQ, k);
 424                 if (!irq)
 425                         break;
 426
 427                 p->irq[k].p = p;
 428                 p->irq[k].requested_irq = irq->start;
 429         }
 430
 431         nirqs = k;
 432         if (nirqs < 1) {
 433                 dev_err(dev, "not enough IRQ resources\n");
 434                 ret = -EINVAL;
 435                 goto err0;
 436         }
 437
 438         /* ioremap IOMEM and setup read/write callbacks */
 439         for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
 440                 i = &p->iomem[k];
 441
 442                 /* handle optional registers */
 443                 if (!io[k])
 444                         continue;
 445
 446                 switch (resource_size(io[k])) {
 447                 case 1:
 448                         i->width = 8;
 449                         i->read = intc_irqpin_read8;
 450                         i->write = intc_irqpin_write8;
 451                         break;
 452                 case 4:
 453                         i->width = 32;
 454                         i->read = intc_irqpin_read32;
 455                         i->write = intc_irqpin_write32;
 456                         break;
 457                 default:
 458                         dev_err(dev, "IOMEM size mismatch\n");
 459                         ret = -EINVAL;
 460                         goto err0;
 461                 }
 462
 463                 i->iomem = devm_ioremap(dev, io[k]->start,
 464                                                 resource_size(io[k]));
 465                 if (!i->iomem) {
 466                         dev_err(dev, "failed to remap IOMEM\n");
 467                         ret = -ENXIO;
 468                         goto err0;
 469                 }
 470         }
 471
 472         /* configure "individual IRQ mode" where needed */
 473         if (config && config->needs_irlm) {
 474                 if (io[INTC_IRQPIN_REG_IRLM])
 475                         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_IRLM,
 476                                                       config->irlm_bit, 1, 1);
 477                 else
 478                         dev_warn(dev, "unable to select IRLM mode\n");
 479         }
 480
 481         /* mask all interrupts using priority */
 482         for (k = 0; k < nirqs; k++)
 483                 intc_irqpin_mask_unmask_prio(p, k, 1);
 484
 485         /* clear all pending interrupts */
 486         intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, 0x0);
 487
 488         /* scan for shared interrupt lines */
 489         ref_irq = p->irq[0].requested_irq;
 490         p->shared_irqs = 1;
 491         for (k = 1; k < nirqs; k++) {
 492                 if (ref_irq != p->irq[k].requested_irq) {
 493                         p->shared_irqs = 0;
 494                         break;
 495                 }
 496         }
 497
 498         /* use more severe masking method if requested */
 499         if (control_parent) {
 500                 enable_fn = intc_irqpin_irq_enable_force;
 501                 disable_fn = intc_irqpin_irq_disable_force;
 502         } else if (!p->shared_irqs) {
 503                 enable_fn = intc_irqpin_irq_enable;
 504                 disable_fn = intc_irqpin_irq_disable;
 505         } else {
 506                 enable_fn = intc_irqpin_shared_irq_enable;
 507                 disable_fn = intc_irqpin_shared_irq_disable;
 508         }
 509
 510         irq_chip = &p->irq_chip;
 511         irq_chip->name = "intc-irqpin";
 512         irq_chip->parent_device = dev;
 513         irq_chip->irq_mask = disable_fn;
 514         irq_chip->irq_unmask = enable_fn;
 515         irq_chip->irq_set_type = intc_irqpin_irq_set_type;
 516         irq_chip->irq_set_wake = intc_irqpin_irq_set_wake;
 517         irq_chip->flags = IRQCHIP_MASK_ON_SUSPEND;
 518
 519         p->irq_domain = irq_domain_add_simple(dev->of_node, nirqs, 0,
 520                                               &intc_irqpin_irq_domain_ops, p);
 521         if (!p->irq_domain) {
 522                 ret = -ENXIO;
 523                 dev_err(dev, "cannot initialize irq domain\n");
 524                 goto err0;
 525         }
 526
 527         if (p->shared_irqs) {
 528                 /* request one shared interrupt */
 529                 if (devm_request_irq(dev, p->irq[0].requested_irq,
 530                                 intc_irqpin_shared_irq_handler,
 531                                 IRQF_SHARED, name, p)) {
 532                         dev_err(dev, "failed to request low IRQ\n");
 533                         ret = -ENOENT;
 534                         goto err1;
 535                 }
 536         } else {
 537                 /* request interrupts one by one */
 538                 for (k = 0; k < nirqs; k++) {
 539                         if (devm_request_irq(dev, p->irq[k].requested_irq,
 540                                              intc_irqpin_irq_handler, 0, name,
 541                                              &p->irq[k])) {
 542                                 dev_err(dev, "failed to request low IRQ\n");
 543                                 ret = -ENOENT;
 544                                 goto err1;
 545                         }
 546                 }
 547         }
 548
 549         /* unmask all interrupts on prio level */
 550         for (k = 0; k < nirqs; k++)
 551                 intc_irqpin_mask_unmask_prio(p, k, 0);
 552
 553         dev_info(dev, "driving %d irqs\n", nirqs);
 554
 555         return 0;
 556
 557 err1:
 558         irq_domain_remove(p->irq_domain);
 559 err0:
 560         pm_runtime_put(dev);
 561         pm_runtime_disable(dev);
 562         return ret;
 563 }
 564
 565 static int intc_irqpin_remove(struct platform_device *pdev)
 566 {
 567         struct intc_irqpin_priv *p = platform_get_drvdata(pdev);
 568
 569         irq_domain_remove(p->irq_domain);
 570         pm_runtime_put(&pdev->dev);
 571         pm_runtime_disable(&pdev->dev);
 572         return 0;
 573 }
 574
 575 static int __maybe_unused intc_irqpin_suspend(struct device *dev)
 576 {
 577         struct intc_irqpin_priv *p = dev_get_drvdata(dev);
 578
 579         if (atomic_read(&p->wakeup_path))
 580                 device_set_wakeup_path(dev);
 581
 582         return 0;
 583 }
 584
 585 static SIMPLE_DEV_PM_OPS(intc_irqpin_pm_ops, intc_irqpin_suspend, NULL);
 586
 587 static struct platform_driver intc_irqpin_device_driver = {
 588         .probe          = intc_irqpin_probe,
 589         .remove         = intc_irqpin_remove,
 590         .driver         = {
 591                 .name   = "renesas_intc_irqpin",
 592                 .of_match_table = intc_irqpin_dt_ids,
 593                 .pm     = &intc_irqpin_pm_ops,
 594         }
 595 };
 596
 597 static int __init intc_irqpin_init(void)
 598 {
 599         return platform_driver_register(&intc_irqpin_device_driver);
 600 }
 601 postcore_initcall(intc_irqpin_init);
 602
 603 static void __exit intc_irqpin_exit(void)
 604 {
 605         platform_driver_unregister(&intc_irqpin_device_driver);
 606 }
 607 module_exit(intc_irqpin_exit);
 608
 609 MODULE_AUTHOR("Magnus Damm");
 610 MODULE_DESCRIPTION("Renesas INTC External IRQ Pin Driver");
 611 MODULE_LICENSE("GPL v2");