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
   9 #include <linux/of_irq.h>
  10 #include <linux/of_platform.h>
  11
  12 #include <sysdev/cpm2_pic.h>
  13
  14 #include "mpc85xx.h"
  15
  16 static struct of_device_id __initdata mpc85xx_common_ids[] = {
  17         { .type = "soc", },
  18         { .compatible = "soc", },
  19         { .compatible = "simple-bus", },
  20         { .name = "cpm", },
  21         { .name = "localbus", },
  22         { .compatible = "gianfar", },
  23         { .compatible = "fsl,qe", },
  24         { .compatible = "fsl,cpm2", },
  25         { .compatible = "fsl,srio", },
  26         /* So that the DMA channel nodes can be probed individually: */
  27         { .compatible = "fsl,eloplus-dma", },
  28         /* For the PMC driver */
  29         { .compatible = "fsl,mpc8548-guts", },
  30         /* Probably unnecessary? */
  31         { .compatible = "gpio-leds", },
  32         /* For all PCI controllers */
  33         { .compatible = "fsl,mpc8540-pci", },
  34         { .compatible = "fsl,mpc8548-pcie", },
  35         { .compatible = "fsl,p1022-pcie", },
  36         { .compatible = "fsl,p1010-pcie", },
  37         { .compatible = "fsl,p1023-pcie", },
  38         { .compatible = "fsl,p4080-pcie", },
  39         { .compatible = "fsl,qoriq-pcie-v2.4", },
  40         { .compatible = "fsl,qoriq-pcie-v2.3", },
  41         { .compatible = "fsl,qoriq-pcie-v2.2", },
  42         {},
  43 };
  44
  45 int __init mpc85xx_common_publish_devices(void)
  46 {
  47         return of_platform_bus_probe(NULL, mpc85xx_common_ids, NULL);
  48 }
  49 #ifdef CONFIG_CPM2
  50 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  51 {
  52         struct irq_chip *chip = irq_desc_get_chip(desc);
  53         int cascade_irq;
  54
  55         while ((cascade_irq = cpm2_get_irq()) >= 0)
  56                 generic_handle_irq(cascade_irq);
  57
  58         chip->irq_eoi(&desc->irq_data);
  59 }
  60
  61
  62 void __init mpc85xx_cpm2_pic_init(void)
  63 {
  64         struct device_node *np;
  65         int irq;
  66
  67         /* Setup CPM2 PIC */
  68         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  69         if (np == NULL) {
  70                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  71                 return;
  72         }
  73         irq = irq_of_parse_and_map(np, 0);
  74         if (irq == NO_IRQ) {
  75                 of_node_put(np);
  76                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  77                 return;
  78         }
  79
  80         cpm2_pic_init(np);
  81         of_node_put(np);
  82         irq_set_chained_handler(irq, cpm2_cascade);
  83 }
  84 #endif