bcma: get IRQ numbers from dt

It is not possible to auto detect the irq numbers used by the cores on
an arm SoC. If bcma was registered with device tree it will search for
some device tree nodes with the irq number and add it to the core
configuration.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/Documentation/devicetree/bindings/bus/bcma.txt b/Documentation/devicetree/bindings/bus/bcma.txt
index 62a48348ac1561935416f7d0bd4e4c5357b60429..edd44d8021392f27b2f3fa1655068f4dbd3b2d8c 100644 (file)
--- a/Documentation/devicetree/bindings/bus/bcma.txt
+++ b/Documentation/devicetree/bindings/bus/bcma.txt
@@ -8,6 +8,11 @@ Required properties:
 
 The cores on the AXI bus are automatically detected by bcma with the
 memory ranges they are using and they get registered afterwards.
+Automatic detection of the IRQ number is not working on
+BCM47xx/BCM53xx ARM SoCs. To assign IRQ numbers to the cores, provide
+them manually through device tree. Use an interrupt-map to specify the
+IRQ used by the devices on the bus. The first address is just an index,
+because we do not have any special register.
 
 The top-level axi bus may contain children representing attached cores
 (devices). This is needed since some hardware details can't be auto
@@ -22,6 +27,22 @@ Example:
                ranges = <0x00000000 0x18000000 0x00100000>;
                #address-cells = <1>;
                #size-cells = <1>;
+               #interrupt-cells = <1>;
+               interrupt-map-mask = <0x000fffff 0xffff>;
+               interrupt-map =
+                       /* Ethernet Controller 0 */
+                       <0x00024000 0 &gic GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>,
+
+                       /* Ethernet Controller 1 */
+                       <0x00025000 0 &gic GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+
+                       /* PCIe Controller 0 */
+                       <0x00012000 0 &gic GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
+                       <0x00012000 1 &gic GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>,
+                       <0x00012000 2 &gic GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>,
+                       <0x00012000 3 &gic GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH>,
+                       <0x00012000 4 &gic GIC_SPI 130 IRQ_TYPE_LEVEL_HIGH>,
+                       <0x00012000 5 &gic GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
 
                chipcommon {
                        reg = <0x00000000 0x1000>;

diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 6d1cf57014521d73c3d66657d8aeb30a2c504b95..122086ef9fe1b78accfeffecb97ccbbcd35e4751 100644 (file)
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -11,6 +11,7 @@
 #include <linux/bcma/bcma.h>
 #include <linux/slab.h>
 #include <linux/of_address.h>
+#include <linux/of_irq.h>
 
 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
 MODULE_LICENSE("GPL");
@@ -153,6 +154,46 @@ static struct device_node *bcma_of_find_child_device(struct platform_device *par
        return NULL;
 }
 
+static int bcma_of_irq_parse(struct platform_device *parent,
+                            struct bcma_device *core,
+                            struct of_phandle_args *out_irq, int num)
+{
+       __be32 laddr[1];
+       int rc;
+
+       if (core->dev.of_node) {
+               rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
+               if (!rc)
+                       return rc;
+       }
+
+       out_irq->np = parent->dev.of_node;
+       out_irq->args_count = 1;
+       out_irq->args[0] = num;
+
+       laddr[0] = cpu_to_be32(core->addr);
+       return of_irq_parse_raw(laddr, out_irq);
+}
+
+static unsigned int bcma_of_get_irq(struct platform_device *parent,
+                                   struct bcma_device *core, int num)
+{
+       struct of_phandle_args out_irq;
+       int ret;
+
+       if (!parent || !parent->dev.of_node)
+               return 0;
+
+       ret = bcma_of_irq_parse(parent, core, &out_irq, num);
+       if (ret) {
+               bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
+                          ret);
+               return 0;
+       }
+
+       return irq_create_of_mapping(&out_irq);
+}
+
 static void bcma_of_fill_device(struct platform_device *parent,
                                struct bcma_device *core)
 {
@@ -161,12 +202,19 @@ static void bcma_of_fill_device(struct platform_device *parent,
        node = bcma_of_find_child_device(parent, core);
        if (node)
                core->dev.of_node = node;
+
+       core->irq = bcma_of_get_irq(parent, core, 0);
 }
 #else
 static void bcma_of_fill_device(struct platform_device *parent,
                                struct bcma_device *core)
 {
 }
+static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
+                                          struct bcma_device *core, int num)
+{
+       return 0;
+}
 #endif /* CONFIG_OF */
 
 unsigned int bcma_core_irq(struct bcma_device *core, int num)
@@ -182,7 +230,9 @@ unsigned int bcma_core_irq(struct bcma_device *core, int num)
                        mips_irq = bcma_core_mips_irq(core);
                        return mips_irq <= 4 ? mips_irq + 2 : 0;
                }
-               break;
+               if (bus->host_pdev)
+                       return bcma_of_get_irq(bus->host_pdev, core, num);
+               return 0;
        case BCMA_HOSTTYPE_SDIO:
                return 0;
        }