arch/powerpc/platforms/85xx/mpc85xx_common.c

   1 /*
   2  * Routines common to most mpc85xx-based boards.
   3  *
   4  * This is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include <linux/of_platform.h>
   9
  10 #include <sysdev/cpm2_pic.h>
  11
  12 #include "mpc85xx.h"
  13
  14 static struct of_device_id __initdata mpc85xx_common_ids[] = {
  15         { .type = "soc", },
  16         { .compatible = "soc", },
  17         { .compatible = "simple-bus", },
  18         { .name = "cpm", },
  19         { .name = "localbus", },
  20         { .compatible = "gianfar", },
  21         { .compatible = "fsl,qe", },
  22         { .compatible = "fsl,cpm2", },
  23         {},
  24 };
  25
  26 int __init mpc85xx_common_publish_devices(void)
  27 {
  28         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  29 }
  30 #ifdef CONFIG_CPM2
  31 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  32 {
  33         struct irq_chip *chip = irq_desc_get_chip(desc);
  34         int cascade_irq;
  35
  36         while ((cascade_irq = cpm2_get_irq()) >= 0)
  37                 generic_handle_irq(cascade_irq);
  38
  39         chip->irq_eoi(&desc->irq_data);
  40 }
  41
  42
  43 void __init mpc85xx_cpm2_pic_init(void)
  44 {
  45         struct device_node *np;
  46         int irq;
  47
  48         /* Setup CPM2 PIC */
  49         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  50         if (np == NULL) {
  51                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  52                 return;
  53         }
  54         irq = irq_of_parse_and_map(np, 0);
  55         if (irq == NO_IRQ) {
  56                 of_node_put(np);
  57                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  58                 return;
  59         }
  60
  61         cpm2_pic_init(np);
  62         of_node_put(np);
  63         irq_set_chained_handler(irq, cpm2_cascade);
  64 }
  65 #endif