[SPARC]: sparc32 side of of_device layer IRQ resolution.

Happily, life is much simpler on 32-bit sparc systems.
The "intr" property, preferred over the "interrupts"
property is used-as.  Some minor translations of this
value happen on sun4d systems.

The stage is now set to rewrite the sparc serial driver
probing to use the of_driver framework, and then to convert
all SBUS, EBUS, and ISA drivers in-kind so that we can nuke
all those special bus frameworks.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 66 insertions, 8 deletions

diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c
index 3ebe6cc71e71..bc956c530376 100644
--- a/arch/sparc/kernel/of_device.c
+++ b/arch/sparc/kernel/of_device.c
@@ -129,6 +129,26 @@ static int of_device_resume(struct device * dev)
         return error;
 }
 
+static int node_match(struct device *dev, void *data)
+{
+        struct of_device *op = to_of_device(dev);
+        struct device_node *dp = data;
+
+        return (op->node == dp);
+}
+
+struct of_device *of_find_device_by_node(struct device_node *dp)
+{
+        struct device *dev = bus_find_device(&of_bus_type, NULL,
+                                             dp, node_match);
+
+        if (dev)
+                return to_of_device(dev);
+
+        return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
 #ifdef CONFIG_PCI
 struct bus_type ebus_bus_type = {
        .name    = "ebus",
@@ -503,8 +523,8 @@ static struct of_device * __init scan_one_device(struct device_node *dp,
                                                  struct device *parent)
 {
         struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
-        unsigned int *irq;
-        int len;
+        struct linux_prom_irqs *intr;
+        int len, i;
 
         if (!op)
                 return NULL;
@@ -517,11 +537,46 @@ static struct of_device * __init scan_one_device(struct device_node *dp,
         if (op->portid == -1)
                 op->portid = of_getintprop_default(dp, "portid", -1);
 
-        irq = of_get_property(dp, "interrupts", &len);
-        if (irq)
-                op->irq = *irq;
-        else
-                op->irq = 0xffffffff;
+        intr = of_get_property(dp, "intr", &len);
+        if (intr) {
+                op->num_irqs = len / sizeof(struct linux_prom_irqs);
+                for (i = 0; i < op->num_irqs; i++)
+                        op->irqs[i] = intr[i].pri;
+        } else {
+                unsigned int *irq = of_get_property(dp, "interrupts", &len);
+
+                if (irq) {
+                        op->num_irqs = len / sizeof(unsigned int);
+                        for (i = 0; i < op->num_irqs; i++)
+                                op->irqs[i] = irq[i];
+                } else {
+                        op->num_irqs = 0;
+                }
+        }
+        if (sparc_cpu_model == sun4d) {
+                static int pil_to_sbus[] = {
+                        0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+                };
+                struct device_node *busp = dp->parent;
+                struct linux_prom_registers *regs;
+                int board = of_getintprop_default(busp, "board#", 0);
+                int slot;
+
+                regs = of_get_property(dp, "reg", NULL);
+                slot = regs->which_io;
+
+                for (i = 0; i < op->num_irqs; i++) {
+                        int this_irq = op->irqs[i];
+                        int sbusl = pil_to_sbus[this_irq];
+
+                        if (sbusl)
+                                this_irq = (((board + 1) << 5) +
+                                            (sbusl << 2) +
+                                            slot);
+
+                        op->irqs[i] = this_irq;
+                }
+        }
 
         build_device_resources(op, parent);
 
diff --git a/include/asm-sparc/of_device.h b/include/asm-sparc/of_device.h
index b5ca3145d48b..80ea31f6e17f 100644
--- a/include/asm-sparc/of_device.h
+++ b/include/asm-sparc/of_device.h
@@ -21,7 +21,8 @@ struct of_device
         struct device_node              *node;
         struct device                   dev;
         struct resource                 resource[PROMREG_MAX];
-        unsigned int                    irq;
+        unsigned int                    irqs[PROMINTR_MAX];
+        int                             num_irqs;
 
         void                            *sysdata;
 
@@ -34,6 +35,8 @@ struct of_device
 extern void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name);
 extern void of_iounmap(void __iomem *base, unsigned long size);
 
+extern struct of_device *of_find_device_by_node(struct device_node *);
+
 extern const struct of_device_id *of_match_device(
         const struct of_device_id *matches, const struct of_device *dev);