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

   1 From eaf1943a2c49cbc6eb0ffafa7b6ced45f2d328da 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 05/17] bcma: get IRQ numbers from dt
   5
   6 It is not possible to auto detect the irq numbers used by the cores on
   7 an arm SoC. If bcma was registered with device tree it will search for
   8 some device tree nodes with the irq number and add it to the core
   9 configuration.
  10
  11 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  12 ---
  13  drivers/bcma/main.c | 42 +++++++++++++++++++++++++++++++++++++++++-
  14  1 file changed, 41 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/bcma/main.c
  17 +++ b/drivers/bcma/main.c
  18 @@ -10,6 +10,8 @@
  19  #include <linux/platform_device.h>
  20  #include <linux/bcma/bcma.h>
  21  #include <linux/slab.h>
  22 +#include <linux/of_irq.h>
  23 +#include <linux/of_address.h>
  24
  25  MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
  26  MODULE_LICENSE("GPL");
  27 @@ -131,6 +133,38 @@ static bool bcma_is_core_needed_early(u1
  28         return false;
  29  }
  30
  31 +static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
  32 +                                                    struct bcma_device *core)
  33 +{
  34 +       struct device_node *node;
  35 +       u64 size;
  36 +       const __be32 *reg;
  37 +
  38 +       if (!parent || !parent->dev.of_node)
  39 +               return NULL;
  40 +
  41 +       for_each_child_of_node(parent->dev.of_node, node) {
  42 +               reg = of_get_address(node, 0, &size, NULL);
  43 +               if (!reg)
  44 +                       continue;
  45 +               if (be32_to_cpup(reg) == core->addr)
  46 +                       return node;
  47 +       }
  48 +       return NULL;
  49 +}
  50 +
  51 +static void bcma_of_fill_device(struct platform_device *parent,
  52 +                               struct bcma_device *core)
  53 +{
  54 +       struct device_node *node;
  55 +
  56 +       node = bcma_of_find_child_device(parent, core);
  57 +       if (!node)
  58 +               return;
  59 +       core->dev.of_node = node;
  60 +       core->irq = irq_of_parse_and_map(node, 0);
  61 +}
  62 +
  63  static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
  64  {
  65         int err;
  66 @@ -147,7 +181,13 @@ static void bcma_register_core(struct bc
  67                 break;
  68         case BCMA_HOSTTYPE_SOC:
  69                 core->dev.dma_mask = &core->dev.coherent_dma_mask;
  70 -               core->dma_dev = &core->dev;
  71 +               if (bus->host_pdev) {
  72 +                       core->dma_dev = &bus->host_pdev->dev;
  73 +                       core->dev.parent = &bus->host_pdev->dev;
  74 +                       bcma_of_fill_device(bus->host_pdev, core);
  75 +               } else {
  76 +                       core->dma_dev = &core->dev;
  77 +               }
  78                 break;
  79         case BCMA_HOSTTYPE_SDIO:
  80                 break;