1 files changed, 66 insertions, 10 deletions

diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index c39f5c225f2e..896548ba1ca1 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -14,6 +14,7 @@
 #include <linux/pci.h>
 #include <linux/msi.h>
 #include <linux/of_platform.h>
+#include <linux/debugfs.h>
 
 #include <asm/dcr.h>
 #include <asm/machdep.h>
@@ -69,8 +70,19 @@ struct axon_msic {
         dma_addr_t fifo_phys;
         dcr_host_t dcr_host;
         u32 read_offset;
+#ifdef DEBUG
+        u32 __iomem *trigger;
+#endif
 };
 
+#ifdef DEBUG
+void axon_msi_debug_setup(struct device_node *dn, struct axon_msic *msic);
+#else
+static inline void axon_msi_debug_setup(struct device_node *dn,
+                                        struct axon_msic *msic) { }
+#endif
+
+
 static void msic_dcr_write(struct axon_msic *msic, unsigned int dcr_n, u32 val)
 {
         pr_debug("axon_msi: dcr_write(0x%x, 0x%x)\n", val, dcr_n);
@@ -346,7 +358,14 @@ static int axon_msi_probe(struct of_device *device,
                 goto out_free_msic;
         }
 
-        msic->irq_host = irq_alloc_host(of_node_get(dn), IRQ_HOST_MAP_NOMAP,
+        virq = irq_of_parse_and_map(dn, 0);
+        if (virq == NO_IRQ) {
+                printk(KERN_ERR "axon_msi: irq parse and map failed for %s\n",
+                       dn->full_name);
+                goto out_free_fifo;
+        }
+
+        msic->irq_host = irq_alloc_host(dn, IRQ_HOST_MAP_NOMAP,
                                         NR_IRQS, &msic_host_ops, 0);
         if (!msic->irq_host) {
                 printk(KERN_ERR "axon_msi: couldn't allocate irq_host for %s\n",
@@ -356,13 +375,6 @@ static int axon_msi_probe(struct of_device *device,
 
         msic->irq_host->host_data = msic;
 
-        virq = irq_of_parse_and_map(dn, 0);
-        if (virq == NO_IRQ) {
-                printk(KERN_ERR "axon_msi: irq parse and map failed for %s\n",
-                       dn->full_name);
-                goto out_free_host;
-        }
-
         set_irq_data(virq, msic);
         set_irq_chained_handler(virq, axon_msi_cascade);
         pr_debug("axon_msi: irq 0x%x setup for axon_msi\n", virq);
@@ -381,12 +393,12 @@ static int axon_msi_probe(struct of_device *device,
         ppc_md.teardown_msi_irqs = axon_msi_teardown_msi_irqs;
         ppc_md.msi_check_device = axon_msi_check_device;
 
+        axon_msi_debug_setup(dn, msic);
+
         printk(KERN_DEBUG "axon_msi: setup MSIC on %s\n", dn->full_name);
 
         return 0;
 
-out_free_host:
-        kfree(msic->irq_host);
 out_free_fifo:
         dma_free_coherent(&device->dev, MSIC_FIFO_SIZE_BYTES, msic->fifo_virt,
                           msic->fifo_phys);
@@ -418,3 +430,47 @@ static int __init axon_msi_init(void)
         return of_register_platform_driver(&axon_msi_driver);
 }
 subsys_initcall(axon_msi_init);
+
+
+#ifdef DEBUG
+static int msic_set(void *data, u64 val)
+{
+        struct axon_msic *msic = data;
+        out_le32(msic->trigger, val);
+        return 0;
+}
+
+static int msic_get(void *data, u64 *val)
+{
+        *val = 0;
+        return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fops_msic, msic_get, msic_set, "%llu\n");
+
+void axon_msi_debug_setup(struct device_node *dn, struct axon_msic *msic)
+{
+        char name[8];
+        u64 addr;
+
+        addr = of_translate_address(dn, of_get_property(dn, "reg", NULL));
+        if (addr == OF_BAD_ADDR) {
+                pr_debug("axon_msi: couldn't translate reg property\n");
+                return;
+        }
+
+        msic->trigger = ioremap(addr, 0x4);
+        if (!msic->trigger) {
+                pr_debug("axon_msi: ioremap failed\n");
+                return;
+        }
+
+        snprintf(name, sizeof(name), "msic_%d", of_node_to_nid(dn));
+
+        if (!debugfs_create_file(name, 0600, powerpc_debugfs_root,
+                                 msic, &fops_msic)) {
+                pr_debug("axon_msi: debugfs_create_file failed!\n");
+                return;
+        }
+}
+#endif /* DEBUG */