linux/arch/powerpc/platforms/85xx/common.c
<<
>>
Prefs
   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
  14static 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        { .compatible = "fsl,srio", },
  24        {},
  25};
  26
  27int __init mpc85xx_common_publish_devices(void)
  28{
  29        return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  30}
  31#ifdef CONFIG_CPM2
  32static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  33{
  34        struct irq_chip *chip = irq_desc_get_chip(desc);
  35        int cascade_irq;
  36
  37        while ((cascade_irq = cpm2_get_irq()) >= 0)
  38                generic_handle_irq(cascade_irq);
  39
  40        chip->irq_eoi(&desc->irq_data);
  41}
  42
  43
  44void __init mpc85xx_cpm2_pic_init(void)
  45{
  46        struct device_node *np;
  47        int irq;
  48
  49        /* Setup CPM2 PIC */
  50        np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  51        if (np == NULL) {
  52                printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  53                return;
  54        }
  55        irq = irq_of_parse_and_map(np, 0);
  56        if (irq == NO_IRQ) {
  57                of_node_put(np);
  58                printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  59                return;
  60        }
  61
  62        cpm2_pic_init(np);
  63        of_node_put(np);
  64        irq_set_chained_handler(irq, cpm2_cascade);
  65}
  66#endif
  67