arch/powerpc/platforms/85xx/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         { .compatible = "fsl,srio", },
  24         /* So that the DMA channel nodes can be probed individually: */
  25         { .compatible = "fsl,eloplus-dma", },
  26         /* For the PMC driver */
  27         { .compatible = "fsl,mpc8548-guts", },
  28         /* Probably unnecessary? */
  29         { .compatible = "gpio-leds", },
  30         {},
  31 };
  32
  33 int __init mpc85xx_common_publish_devices(void)
  34 {
  35         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  36 }
  37 #ifdef CONFIG_CPM2
  38 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  39 {
  40         struct irq_chip *chip = irq_desc_get_chip(desc);
  41         int cascade_irq;
  42
  43         while ((cascade_irq = cpm2_get_irq()) >= 0)
  44                 generic_handle_irq(cascade_irq);
  45
  46         chip->irq_eoi(&desc->irq_data);
  47 }
  48
  49
  50 void __init mpc85xx_cpm2_pic_init(void)
  51 {
  52         struct device_node *np;
  53         int irq;
  54
  55         /* Setup CPM2 PIC */
  56         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  57         if (np == NULL) {
  58                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  59                 return;
  60         }
  61         irq = irq_of_parse_and_map(np, 0);
  62         if (irq == NO_IRQ) {
  63                 of_node_put(np);
  64                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  65                 return;
  66         }
  67
  68         cpm2_pic_init(np);
  69         of_node_put(np);
  70         irq_set_chained_handler(irq, cpm2_cascade);
  71 }
  72 #endif