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

   1 /*
   2  * Renesas INTC External IRQ Pin Driver
   3  *
   4  *  Copyright (C) 2013 Magnus Damm
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <linux/clk.h>
  21 #include <linux/init.h>
  22 #include <linux/of.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/ioport.h>
  27 #include <linux/io.h>
  28 #include <linux/irq.h>
  29 #include <linux/irqdomain.h>
  30 #include <linux/err.h>
  31 #include <linux/slab.h>
  32 #include <linux/module.h>
  33 #include <linux/of_device.h>
  34 #include <linux/pm_runtime.h>
  35
  36 #define INTC_IRQPIN_MAX 8 /* maximum 8 interrupts per driver instance */
  37
  38 #define INTC_IRQPIN_REG_SENSE 0 /* ICRn */
  39 #define INTC_IRQPIN_REG_PRIO 1 /* INTPRInn */
  40 #define INTC_IRQPIN_REG_SOURCE 2 /* INTREQnn */
  41 #define INTC_IRQPIN_REG_MASK 3 /* INTMSKnn */
  42 #define INTC_IRQPIN_REG_CLEAR 4 /* INTMSKCLRnn */
  43 #define INTC_IRQPIN_REG_NR_MANDATORY 5
  44 #define INTC_IRQPIN_REG_IRLM 5 /* ICR0 with IRLM bit (optional) */
  45 #define INTC_IRQPIN_REG_NR 6
  46
  47 /* INTC external IRQ PIN hardware register access:
  48  *
  49  * SENSE is read-write 32-bit with 2-bits or 4-bits per IRQ (*)
  50  * PRIO is read-write 32-bit with 4-bits per IRQ (**)
  51  * SOURCE is read-only 32-bit or 8-bit with 1-bit per IRQ (***)
  52  * MASK is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
  53  * CLEAR is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
  54  *
  55  * (*) May be accessed by more than one driver instance - lock needed
  56  * (**) Read-modify-write access by one driver instance - lock needed
  57  * (***) Accessed by one driver instance only - no locking needed
  58  */
  59
  60 struct intc_irqpin_iomem {
  61         void __iomem *iomem;
  62         unsigned long (*read)(void __iomem *iomem);
  63         void (*write)(void __iomem *iomem, unsigned long data);
  64         int width;
  65 };
  66
  67 struct intc_irqpin_irq {
  68         int hw_irq;
  69         int requested_irq;
  70         int domain_irq;
  71         struct intc_irqpin_priv *p;
  72 };
  73
  74 struct intc_irqpin_priv {
  75         struct intc_irqpin_iomem iomem[INTC_IRQPIN_REG_NR];
  76         struct intc_irqpin_irq irq[INTC_IRQPIN_MAX];
  77         unsigned int sense_bitfield_width;
  78         struct platform_device *pdev;
  79         struct irq_chip irq_chip;
  80         struct irq_domain *irq_domain;
  81         struct clk *clk;
  82         unsigned shared_irqs:1;
  83         unsigned needs_clk:1;
  84         u8 shared_irq_mask;
  85 };
  86
  87 struct intc_irqpin_config {
  88         unsigned int irlm_bit;
  89         unsigned needs_irlm:1;
  90         unsigned needs_clk:1;
  91 };
  92
  93 static unsigned long intc_irqpin_read32(void __iomem *iomem)
  94 {
  95         return ioread32(iomem);
  96 }
  97
  98 static unsigned long intc_irqpin_read8(void __iomem *iomem)
  99 {
 100         return ioread8(iomem);
 101 }
 102
 103 static void intc_irqpin_write32(void __iomem *iomem, unsigned long data)
 104 {
 105         iowrite32(data, iomem);
 106 }
 107
 108 static void intc_irqpin_write8(void __iomem *iomem, unsigned long data)
 109 {
 110         iowrite8(data, iomem);
 111 }
 112
 113 static inline unsigned long intc_irqpin_read(struct intc_irqpin_priv *p,
 114                                              int reg)
 115 {
 116         struct intc_irqpin_iomem *i = &p->iomem[reg];
 117
 118         return i->read(i->iomem);
 119 }
 120
 121 static inline void intc_irqpin_write(struct intc_irqpin_priv *p,
 122                                      int reg, unsigned long data)
 123 {
 124         struct intc_irqpin_iomem *i = &p->iomem[reg];
 125
 126         i->write(i->iomem, data);
 127 }
 128
 129 static inline unsigned long intc_irqpin_hwirq_mask(struct intc_irqpin_priv *p,
 130                                                    int reg, int hw_irq)
 131 {
 132         return BIT((p->iomem[reg].width - 1) - hw_irq);
 133 }
 134
 135 static inline void intc_irqpin_irq_write_hwirq(struct intc_irqpin_priv *p,
 136                                                int reg, int hw_irq)
 137 {
 138         intc_irqpin_write(p, reg, intc_irqpin_hwirq_mask(p, reg, hw_irq));
 139 }
 140
 141 static DEFINE_RAW_SPINLOCK(intc_irqpin_lock); /* only used by slow path */
 142
 143 static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p,
 144                                           int reg, int shift,
 145                                           int width, int value)
 146 {
 147         unsigned long flags;
 148         unsigned long tmp;
 149
 150         raw_spin_lock_irqsave(&intc_irqpin_lock, flags);
 151
 152         tmp = intc_irqpin_read(p, reg);
 153         tmp &= ~(((1 << width) - 1) << shift);
 154         tmp |= value << shift;
 155         intc_irqpin_write(p, reg, tmp);
 156
 157         raw_spin_unlock_irqrestore(&intc_irqpin_lock, flags);
 158 }
 159
 160 static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p,
 161                                          int irq, int do_mask)
 162 {
 163         /* The PRIO register is assumed to be 32-bit with fixed 4-bit fields. */
 164         int bitfield_width = 4;
 165         int shift = 32 - (irq + 1) * bitfield_width;
 166
 167         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_PRIO,
 168                                       shift, bitfield_width,
 169                                       do_mask ? 0 : (1 << bitfield_width) - 1);
 170 }
 171
 172 static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value)
 173 {
 174         /* The SENSE register is assumed to be 32-bit. */
 175         int bitfield_width = p->sense_bitfield_width;
 176         int shift = 32 - (irq + 1) * bitfield_width;
 177
 178         dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value);
 179
 180         if (value >= (1 << bitfield_width))
 181                 return -EINVAL;
 182
 183         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_SENSE, shift,
 184                                       bitfield_width, value);
 185         return 0;
 186 }
 187
 188 static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str)
 189 {
 190         dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n",
 191                 str, i->requested_irq, i->hw_irq, i->domain_irq);
 192 }
 193
 194 static void intc_irqpin_irq_enable(struct irq_data *d)
 195 {
 196         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 197         int hw_irq = irqd_to_hwirq(d);
 198
 199         intc_irqpin_dbg(&p->irq[hw_irq], "enable");
 200         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
 201 }
 202
 203 static void intc_irqpin_irq_disable(struct irq_data *d)
 204 {
 205         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 206         int hw_irq = irqd_to_hwirq(d);
 207
 208         intc_irqpin_dbg(&p->irq[hw_irq], "disable");
 209         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
 210 }
 211
 212 static void intc_irqpin_shared_irq_enable(struct irq_data *d)
 213 {
 214         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 215         int hw_irq = irqd_to_hwirq(d);
 216
 217         intc_irqpin_dbg(&p->irq[hw_irq], "shared enable");
 218         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
 219
 220         p->shared_irq_mask &= ~BIT(hw_irq);
 221 }
 222
 223 static void intc_irqpin_shared_irq_disable(struct irq_data *d)
 224 {
 225         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 226         int hw_irq = irqd_to_hwirq(d);
 227
 228         intc_irqpin_dbg(&p->irq[hw_irq], "shared disable");
 229         intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
 230
 231         p->shared_irq_mask |= BIT(hw_irq);
 232 }
 233
 234 static void intc_irqpin_irq_enable_force(struct irq_data *d)
 235 {
 236         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 237         int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 238
 239         intc_irqpin_irq_enable(d);
 240
 241         /* enable interrupt through parent interrupt controller,
 242          * assumes non-shared interrupt with 1:1 mapping
 243          * needed for busted IRQs on some SoCs like sh73a0
 244          */
 245         irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq));
 246 }
 247
 248 static void intc_irqpin_irq_disable_force(struct irq_data *d)
 249 {
 250         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 251         int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 252
 253         /* disable interrupt through parent interrupt controller,
 254          * assumes non-shared interrupt with 1:1 mapping
 255          * needed for busted IRQs on some SoCs like sh73a0
 256          */
 257         irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq));
 258         intc_irqpin_irq_disable(d);
 259 }
 260
 261 #define INTC_IRQ_SENSE_VALID 0x10
 262 #define INTC_IRQ_SENSE(x) (x + INTC_IRQ_SENSE_VALID)
 263
 264 static unsigned char intc_irqpin_sense[IRQ_TYPE_SENSE_MASK + 1] = {
 265         [IRQ_TYPE_EDGE_FALLING] = INTC_IRQ_SENSE(0x00),
 266         [IRQ_TYPE_EDGE_RISING] = INTC_IRQ_SENSE(0x01),
 267         [IRQ_TYPE_LEVEL_LOW] = INTC_IRQ_SENSE(0x02),
 268         [IRQ_TYPE_LEVEL_HIGH] = INTC_IRQ_SENSE(0x03),
 269         [IRQ_TYPE_EDGE_BOTH] = INTC_IRQ_SENSE(0x04),
 270 };
 271
 272 static int intc_irqpin_irq_set_type(struct irq_data *d, unsigned int type)
 273 {
 274         unsigned char value = intc_irqpin_sense[type & IRQ_TYPE_SENSE_MASK];
 275         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 276
 277         if (!(value & INTC_IRQ_SENSE_VALID))
 278                 return -EINVAL;
 279
 280         return intc_irqpin_set_sense(p, irqd_to_hwirq(d),
 281                                      value ^ INTC_IRQ_SENSE_VALID);
 282 }
 283
 284 static int intc_irqpin_irq_set_wake(struct irq_data *d, unsigned int on)
 285 {
 286         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
 287         int hw_irq = irqd_to_hwirq(d);
 288
 289         irq_set_irq_wake(p->irq[hw_irq].requested_irq, on);
 290
 291         if (!p->clk)
 292                 return 0;
 293
 294         if (on)
 295                 clk_enable(p->clk);
 296         else
 297                 clk_disable(p->clk);
 298
 299         return 0;
 300 }
 301
 302 static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id)
 303 {
 304         struct intc_irqpin_irq *i = dev_id;
 305         struct intc_irqpin_priv *p = i->p;
 306         unsigned long bit;
 307
 308         intc_irqpin_dbg(i, "demux1");
 309         bit = intc_irqpin_hwirq_mask(p, INTC_IRQPIN_REG_SOURCE, i->hw_irq);
 310
 311         if (intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE) & bit) {
 312                 intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, ~bit);
 313                 intc_irqpin_dbg(i, "demux2");
 314                 generic_handle_irq(i->domain_irq);
 315                 return IRQ_HANDLED;
 316         }
 317         return IRQ_NONE;
 318 }
 319
 320 static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id)
 321 {
 322         struct intc_irqpin_priv *p = dev_id;
 323         unsigned int reg_source = intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE);
 324         irqreturn_t status = IRQ_NONE;
 325         int k;
 326
 327         for (k = 0; k < 8; k++) {
 328                 if (reg_source & BIT(7 - k)) {
 329                         if (BIT(k) & p->shared_irq_mask)
 330                                 continue;
 331
 332                         status |= intc_irqpin_irq_handler(irq, &p->irq[k]);
 333                 }
 334         }
 335
 336         return status;
 337 }
 338
 339 /*
 340  * This lock class tells lockdep that INTC External IRQ Pin irqs are in a
 341  * different category than their parents, so it won't report false recursion.
 342  */
 343 static struct lock_class_key intc_irqpin_irq_lock_class;
 344
 345 static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
 346                                       irq_hw_number_t hw)
 347 {
 348         struct intc_irqpin_priv *p = h->host_data;
 349
 350         p->irq[hw].domain_irq = virq;
 351         p->irq[hw].hw_irq = hw;
 352
 353         intc_irqpin_dbg(&p->irq[hw], "map");
 354         irq_set_chip_data(virq, h->host_data);
 355         irq_set_lockdep_class(virq, &intc_irqpin_irq_lock_class);
 356         irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq);
 357         return 0;
 358 }
 359
 360 static const struct irq_domain_ops intc_irqpin_irq_domain_ops = {
 361         .map    = intc_irqpin_irq_domain_map,
 362         .xlate  = irq_domain_xlate_twocell,
 363 };
 364
 365 static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = {
 366         .irlm_bit = 23, /* ICR0.IRLM0 */
 367         .needs_irlm = 1,
 368         .needs_clk = 0,
 369 };
 370
 371 static const struct intc_irqpin_config intc_irqpin_rmobile = {
 372         .needs_irlm = 0,
 373         .needs_clk = 1,
 374 };
 375
 376 static const struct of_device_id intc_irqpin_dt_ids[] = {
 377         { .compatible = "renesas,intc-irqpin", },
 378         { .compatible = "renesas,intc-irqpin-r8a7778",
 379           .data = &intc_irqpin_irlm_r8a777x },
 380         { .compatible = "renesas,intc-irqpin-r8a7779",
 381           .data = &intc_irqpin_irlm_r8a777x },
 382         { .compatible = "renesas,intc-irqpin-r8a7740",
 383           .data = &intc_irqpin_rmobile },
 384         { .compatible = "renesas,intc-irqpin-sh73a0",
 385           .data = &intc_irqpin_rmobile },
 386         {},
 387 };
 388 MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids);
 389
 390 static int intc_irqpin_probe(struct platform_device *pdev)
 391 {
 392         const struct intc_irqpin_config *config;
 393         struct device *dev = &pdev->dev;
 394         struct intc_irqpin_priv *p;
 395         struct intc_irqpin_iomem *i;
 396         struct resource *io[INTC_IRQPIN_REG_NR];
 397         struct resource *irq;
 398         struct irq_chip *irq_chip;
 399         void (*enable_fn)(struct irq_data *d);
 400         void (*disable_fn)(struct irq_data *d);
 401         const char *name = dev_name(dev);
 402         bool control_parent;
 403         unsigned int nirqs;
 404         int ref_irq;
 405         int ret;
 406         int k;
 407
 408         p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
 409         if (!p) {
 410                 dev_err(dev, "failed to allocate driver data\n");
 411                 return -ENOMEM;
 412         }
 413
 414         /* deal with driver instance configuration */
 415         of_property_read_u32(dev->of_node, "sense-bitfield-width",
 416                              &p->sense_bitfield_width);
 417         control_parent = of_property_read_bool(dev->of_node, "control-parent");
 418         if (!p->sense_bitfield_width)
 419                 p->sense_bitfield_width = 4; /* default to 4 bits */
 420
 421         p->pdev = pdev;
 422         platform_set_drvdata(pdev, p);
 423
 424         config = of_device_get_match_data(dev);
 425         if (config)
 426                 p->needs_clk = config->needs_clk;
 427
 428         p->clk = devm_clk_get(dev, NULL);
 429         if (IS_ERR(p->clk)) {
 430                 if (p->needs_clk) {
 431                         dev_err(dev, "unable to get clock\n");
 432                         ret = PTR_ERR(p->clk);
 433                         goto err0;
 434                 }
 435                 p->clk = NULL;
 436         }
 437
 438         pm_runtime_enable(dev);
 439         pm_runtime_get_sync(dev);
 440
 441         /* get hold of register banks */
 442         memset(io, 0, sizeof(io));
 443         for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
 444                 io[k] = platform_get_resource(pdev, IORESOURCE_MEM, k);
 445                 if (!io[k] && k < INTC_IRQPIN_REG_NR_MANDATORY) {
 446                         dev_err(dev, "not enough IOMEM resources\n");
 447                         ret = -EINVAL;
 448                         goto err0;
 449                 }
 450         }
 451
 452         /* allow any number of IRQs between 1 and INTC_IRQPIN_MAX */
 453         for (k = 0; k < INTC_IRQPIN_MAX; k++) {
 454                 irq = platform_get_resource(pdev, IORESOURCE_IRQ, k);
 455                 if (!irq)
 456                         break;
 457
 458                 p->irq[k].p = p;
 459                 p->irq[k].requested_irq = irq->start;
 460         }
 461
 462         nirqs = k;
 463         if (nirqs < 1) {
 464                 dev_err(dev, "not enough IRQ resources\n");
 465                 ret = -EINVAL;
 466                 goto err0;
 467         }
 468
 469         /* ioremap IOMEM and setup read/write callbacks */
 470         for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
 471                 i = &p->iomem[k];
 472
 473                 /* handle optional registers */
 474                 if (!io[k])
 475                         continue;
 476
 477                 switch (resource_size(io[k])) {
 478                 case 1:
 479                         i->width = 8;
 480                         i->read = intc_irqpin_read8;
 481                         i->write = intc_irqpin_write8;
 482                         break;
 483                 case 4:
 484                         i->width = 32;
 485                         i->read = intc_irqpin_read32;
 486                         i->write = intc_irqpin_write32;
 487                         break;
 488                 default:
 489                         dev_err(dev, "IOMEM size mismatch\n");
 490                         ret = -EINVAL;
 491                         goto err0;
 492                 }
 493
 494                 i->iomem = devm_ioremap_nocache(dev, io[k]->start,
 495                                                 resource_size(io[k]));
 496                 if (!i->iomem) {
 497                         dev_err(dev, "failed to remap IOMEM\n");
 498                         ret = -ENXIO;
 499                         goto err0;
 500                 }
 501         }
 502
 503         /* configure "individual IRQ mode" where needed */
 504         if (config && config->needs_irlm) {
 505                 if (io[INTC_IRQPIN_REG_IRLM])
 506                         intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_IRLM,
 507                                                       config->irlm_bit, 1, 1);
 508                 else
 509                         dev_warn(dev, "unable to select IRLM mode\n");
 510         }
 511
 512         /* mask all interrupts using priority */
 513         for (k = 0; k < nirqs; k++)
 514                 intc_irqpin_mask_unmask_prio(p, k, 1);
 515
 516         /* clear all pending interrupts */
 517         intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, 0x0);
 518
 519         /* scan for shared interrupt lines */
 520         ref_irq = p->irq[0].requested_irq;
 521         p->shared_irqs = 1;
 522         for (k = 1; k < nirqs; k++) {
 523                 if (ref_irq != p->irq[k].requested_irq) {
 524                         p->shared_irqs = 0;
 525                         break;
 526                 }
 527         }
 528
 529         /* use more severe masking method if requested */
 530         if (control_parent) {
 531                 enable_fn = intc_irqpin_irq_enable_force;
 532                 disable_fn = intc_irqpin_irq_disable_force;
 533         } else if (!p->shared_irqs) {
 534                 enable_fn = intc_irqpin_irq_enable;
 535                 disable_fn = intc_irqpin_irq_disable;
 536         } else {
 537                 enable_fn = intc_irqpin_shared_irq_enable;
 538                 disable_fn = intc_irqpin_shared_irq_disable;
 539         }
 540
 541         irq_chip = &p->irq_chip;
 542         irq_chip->name = name;
 543         irq_chip->irq_mask = disable_fn;
 544         irq_chip->irq_unmask = enable_fn;
 545         irq_chip->irq_set_type = intc_irqpin_irq_set_type;
 546         irq_chip->irq_set_wake = intc_irqpin_irq_set_wake;
 547         irq_chip->flags = IRQCHIP_MASK_ON_SUSPEND;
 548
 549         p->irq_domain = irq_domain_add_simple(dev->of_node, nirqs, 0,
 550                                               &intc_irqpin_irq_domain_ops, p);
 551         if (!p->irq_domain) {
 552                 ret = -ENXIO;
 553                 dev_err(dev, "cannot initialize irq domain\n");
 554                 goto err0;
 555         }
 556
 557         if (p->shared_irqs) {
 558                 /* request one shared interrupt */
 559                 if (devm_request_irq(dev, p->irq[0].requested_irq,
 560                                 intc_irqpin_shared_irq_handler,
 561                                 IRQF_SHARED, name, p)) {
 562                         dev_err(dev, "failed to request low IRQ\n");
 563                         ret = -ENOENT;
 564                         goto err1;
 565                 }
 566         } else {
 567                 /* request interrupts one by one */
 568                 for (k = 0; k < nirqs; k++) {
 569                         if (devm_request_irq(dev, p->irq[k].requested_irq,
 570                                              intc_irqpin_irq_handler, 0, name,
 571                                              &p->irq[k])) {
 572                                 dev_err(dev, "failed to request low IRQ\n");
 573                                 ret = -ENOENT;
 574                                 goto err1;
 575                         }
 576                 }
 577         }
 578
 579         /* unmask all interrupts on prio level */
 580         for (k = 0; k < nirqs; k++)
 581                 intc_irqpin_mask_unmask_prio(p, k, 0);
 582
 583         dev_info(dev, "driving %d irqs\n", nirqs);
 584
 585         return 0;
 586
 587 err1:
 588         irq_domain_remove(p->irq_domain);
 589 err0:
 590         pm_runtime_put(dev);
 591         pm_runtime_disable(dev);
 592         return ret;
 593 }
 594
 595 static int intc_irqpin_remove(struct platform_device *pdev)
 596 {
 597         struct intc_irqpin_priv *p = platform_get_drvdata(pdev);
 598
 599         irq_domain_remove(p->irq_domain);
 600         pm_runtime_put(&pdev->dev);
 601         pm_runtime_disable(&pdev->dev);
 602         return 0;
 603 }
 604
 605 static struct platform_driver intc_irqpin_device_driver = {
 606         .probe          = intc_irqpin_probe,
 607         .remove         = intc_irqpin_remove,
 608         .driver         = {
 609                 .name   = "renesas_intc_irqpin",
 610                 .of_match_table = intc_irqpin_dt_ids,
 611         }
 612 };
 613
 614 static int __init intc_irqpin_init(void)
 615 {
 616         return platform_driver_register(&intc_irqpin_device_driver);
 617 }
 618 postcore_initcall(intc_irqpin_init);
 619
 620 static void __exit intc_irqpin_exit(void)
 621 {
 622         platform_driver_unregister(&intc_irqpin_device_driver);
 623 }
 624 module_exit(intc_irqpin_exit);
 625
 626 MODULE_AUTHOR("Magnus Damm");
 627 MODULE_DESCRIPTION("Renesas INTC External IRQ Pin Driver");
 628 MODULE_LICENSE("GPL v2");