arch/powerpc/platforms/pseries/event_sources.c

   1 /*
   2  * Copyright (C) 2001 Dave Engebretsen IBM Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17  */
  18
  19 #include <asm/prom.h>
  20
  21 #include "pseries.h"
  22
  23 void request_event_sources_irqs(struct device_node *np,
  24                                 irq_handler_t handler,
  25                                 const char *name)
  26 {
  27         int i, index, count = 0;
  28         struct of_phandle_args oirq;
  29         unsigned int virqs[16];
  30
  31         /* First try to do a proper OF tree parsing */
  32         for (index = 0; of_irq_parse_one(np, index, &oirq) == 0;
  33              index++) {
  34                 if (count > 15)
  35                         break;
  36                 virqs[count] = irq_create_of_mapping(&oirq);
  37                 if (virqs[count] == NO_IRQ) {
  38                         pr_err("event-sources: Unable to allocate "
  39                                "interrupt number for %s\n",
  40                                np->full_name);
  41                         WARN_ON(1);
  42                 } else {
  43                         count++;
  44                 }
  45         }
  46
  47         /* Now request them */
  48         for (i = 0; i < count; i++) {
  49                 if (request_irq(virqs[i], handler, 0, name, NULL)) {
  50                         pr_err("event-sources: Unable to request interrupt "
  51                                "%d for %s\n", virqs[i], np->full_name);
  52                         WARN_ON(1);
  53                         return;
  54                 }
  55         }
  56 }
  57