target/linux/bcm53xx/patches-3.14/121-bcma-get-irqs-from-dt.patch

   1 From 3e59da41882a408064cd23f4c9124a7938bdb91f Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Thu, 9 Jan 2014 19:40:14 +0100
   4 Subject: [PATCH 06/15] bcma: get irqs from dt
   5
   6 If bcma was registered with device tree it will search for some nodes
   7 with the irq number and add it to the core configuration.
   8 ---
   9  drivers/bcma/main.c | 42 +++++++++++++++++++++++++++++++++++++++++-
  10  1 file changed, 41 insertions(+), 1 deletion(-)
  11
  12 --- a/drivers/bcma/main.c
  13 +++ b/drivers/bcma/main.c
  14 @@ -10,6 +10,8 @@
  15  #include <linux/platform_device.h>
  16  #include <linux/bcma/bcma.h>
  17  #include <linux/slab.h>
  18 +#include <linux/of_irq.h>
  19 +#include <linux/of_address.h>
  20
  21  MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
  22  MODULE_LICENSE("GPL");
  23 @@ -120,6 +122,38 @@ static void bcma_release_core_dev(struct
  24         kfree(core);
  25  }
  26
  27 +static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
  28 +                                                    struct bcma_device *core)
  29 +{
  30 +       struct device_node *node;
  31 +       u64 size;
  32 +       const __be32 *reg;
  33 +
  34 +       if (!parent || !parent->dev.of_node)
  35 +               return NULL;
  36 +
  37 +       for_each_child_of_node(parent->dev.of_node, node) {
  38 +               reg = of_get_address(node, 0, &size, 0);
  39 +               if (!reg)
  40 +                       continue;
  41 +               if (be32_to_cpup(reg) == core->addr)
  42 +                       return node;
  43 +       }
  44 +       return NULL;
  45 +}
  46 +
  47 +static void bcma_of_fill_device(struct platform_device *parent,
  48 +                               struct bcma_device *core)
  49 +{
  50 +       struct device_node *node;
  51 +
  52 +       node = bcma_of_find_child_device(parent, core);
  53 +       if (!node)
  54 +               return;
  55 +       core->dev.of_node = node;
  56 +       core->irq = irq_of_parse_and_map(node, 0);
  57 +}
  58 +
  59  static int bcma_register_cores(struct bcma_bus *bus)
  60  {
  61         struct bcma_device *core;
  62 @@ -154,7 +188,13 @@ static int bcma_register_cores(struct bc
  63                         break;
  64                 case BCMA_HOSTTYPE_SOC:
  65                         core->dev.dma_mask = &core->dev.coherent_dma_mask;
  66 -                       core->dma_dev = &core->dev;
  67 +                       if (bus->host_pdev) {
  68 +                               core->dma_dev = &bus->host_pdev->dev;
  69 +                               core->dev.parent = &bus->host_pdev->dev;
  70 +                               bcma_of_fill_device(bus->host_pdev, core);
  71 +                       } else {
  72 +                               core->dma_dev = &core->dev;
  73 +                       }
  74                         break;
  75                 case BCMA_HOSTTYPE_SDIO:
  76                         break;